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Regulating means

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345 - Computer graphics processing and selective visual display systems

345204000 - DISPLAY DRIVING CONTROL CIRCUITRY

345211000 - Display power source

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DocumentTitleDate
20110175895METHOD FOR DRIVING DISPLAY DEVICE AND LIQUID CRYSTAL DISPLAY DEVICE - The still image display mode includes a first period of writing the data of the image signal from the driver circuit portion into the pixel; after the first period, a second period of stopping supply of a signal or voltage for operating the driver circuit portion to the driver circuit portion; and after the second period, a third period of restarting the supply of a signal or voltage for operating the driver circuit portion to the driver circuit portion and writing the data of the image signal into the pixel from the driver circuit portion, so that the pixel keeps displaying a still image. A length of a period from the stop of the supply of the signal for operating the driver circuit portion to the driver circuit portion to the restart is set in accordance with a temperature of the display device.07-21-2011
20110175894METHOD FOR DRIVING DISPLAY DEVICE - An object is to provide a convenient display device which consumes sufficiently small amount of power and a method for driving such a display device. The display device can be in an off state with a still image displayed in a still image display mode in which a pixel electrode and a common electrode which are for applying a voltage to the display element are brought into a floating state so that a voltage applied to the display element is held, and a still image is displayed without further supply of a potential. The display device is put to an off state with a desired image displayed in the still image display mode, whereby the display device can have a higher level of security and can be more convenient.07-21-2011
20130044098LIQUID CRYSTAL DISPLAY DEVICE AND DRIVING METHOD OF A LIQUID CRYSTAL DISPLAY DEVICE - A liquid crystal display device includes a gate driver, a source driver and a common driver. An input video signal is stored in a line memory and a gray scale with which an applied voltage becomes highest is detected from data corresponding to 1 line among the signal. A common electrode is driven by a common voltage being reduced in accordance with the gray scale and having a low effective value. The driver is driven by an output controlled in accordance with the voltage thus reduced. A voltage applied to a common electrode is set by using a LUT and a common voltage is set by using a LUT. It is therefore possible to provide a liquid crystal display device and a method of driving the liquid crystal display device, each of which can reduce power consumption.02-21-2013
20120200557Display Module - A display module including a substrate having a plurality of pixels, a data line that supplies a data signal to a pixel, a current supply line that supplies electric current to the pixel, a data driving circuit that supplies a data signal to the data line, and a gate driving circuit thereon. The plurality of pixels are arranged in a display area of the substrate, and each of the plurality of pixels include a light emitting device, a first thin film transistor connected to the data line that supplies the data signal, a second thin film transistor connected to the current supply line, and a capacitor. The light emitting device includes a first electrode layer connected to the second thin film transistor, an organic layer formed on the first electrode layer, and a second electrode layer formed on the organic layer.08-09-2012
20100164938LIGHT EMITTING DEVICE - Power consumption required for charging and discharging a source signal line is reduced in an active matrix EL display device. A bipolar transistor (Bi07-01-2010
20110181583DISPLAY DEVICE AND DRIVING METHOD THEREOF - A display device according to an embodiment of the present invention includes: a pixel including a first subpixel and a second subpixel; a first signal line connected to the first subpixel and transmitting a first signal; a second signal line connected to the second subpixel and transmitting a second signal; a third signal line intersecting the first and the second signal lines, connected to at least one of the first and the second subpixels, and transmitting a third signal; and a fourth signal line intersecting the first and the second signal lines and transmitting a fourth signal, wherein the first subpixel and the second subpixel are supplied with data voltages having different magnitude, and the data voltages applied to the first and the second subpixels are originated from a single image information.07-28-2011
20120162184METHOD OF DRIVING DISPLAY PANEL AND DISPLAY APPARATUS FOR PERFORMING THE SAME - A method of driving a display panel includes applying a common voltage to the display panel, sensing a frequency of the display panel to generate a frequency signal, adjusting a gain of an operational amplifier based on the frequency signal, receiving a feedback common voltage from the display panel, and compensating the common voltage using an input resistor, the operational amplifier and a feedback resistor based on the feedback common voltage to apply the compensated common voltage to the display panel. The operational amplifier includes an inverting input terminal connected to the input resistor, a non-inverting input terminal to which a reference common voltage is applied and an output terminal. The feedback resistor is between the inverting input terminal and the output terminal.06-28-2012
20100091004System and method for driving displays with single latch pixels - A method is disclosed for loading and modulating the pixels of a display in parallel. The method includes the steps of receiving a plurality of data bits, loading the data bits into the storage elements of single-latch pixels in a plurality of rows of the display within a loading period, turning on a light source prior to the end of the loading period when each of the loaded bits has an assertion time greater than or equal to the duration of the loading period. Alternatively, the method includes turning on the light source following the loading period when each of the bits has an assertion time less than the duration of the loading period. Another method includes modulating the light source on and off to conserve power when the light source is supposed to be turned on. A display driver is also disclosed to perform the inventive methods.04-15-2010
20090195528DRIVE CIRCUIT OF DISPLAY PANEL AND DISPLAY APPARATUS - A drive circuit, which drives a display panel having wirings and display devices to be connected to the wirings, has first driving means that allows a potential of the wirings to transit toward the first potential, second driving means that maintains the potential of the wirings at the first potential, and a control circuit that outputs the control signal for controlling the second driving means according to an output of the first driving means. As a result, a plurality of driving means can be controlled at appropriate timing in a simple structure.08-06-2009
20120169705FIELD SEQUENTIAL LIQUID CRYSTAL DISPLAY DEVICE AND METHOD FOR DRIVING THE SAME - A field sequential liquid crystal display device includes: first, second, third and fourth thin film transistors, a frame buffer capacitor, a storage capacitor and a holding capacitor connected to the storage capacitor in parallel. The gate of first thin film transistor is connected to a gate line, the source thereof is connected to a data line, the drain thereof is connected to the source of second thin film transistor; the source of second thin film transistor is connected to one end of frame buffer capacitor, the drain thereof is connected to the drain of third thin film transistor; the other end of frame buffer capacitor and a source of third thin film transistor are connected to the drain of fourth thin film transistor, the source of fourth thin film transistor is grounded; and the drain of second thin film transistor is connected to one end of storage capacitor.07-05-2012
20100149165PLASMA DISPLAY DEVICE AND SEMICONDUCTOR DEVICE - A plasma display device of the present invention having a plurality of display cells, comprises a X electrode kept at a reference voltage, a Y electrode, an address electrode, the X electrode and the Y electrode between which sustain discharge occurs, and an address driver comprising a first switch element Q06-17-2010
20130207959Liquid Crystal Display Controller - The present invention provides a liquid crystal display controller device and method which provides for a full and/or partial display with good display quality and/or low power consumption based on the scanning period for an active scan line being dependent upon a number of reference clock pulses. Some embodiments of the present invention include one or more of the following features: keeping the frequency substantially constant for different numbers of active scan lines, allowing change of the frequency due to characteristics of the LCD, displaying gradation with near linear effective voltage characteristics, displaying graduation data with lower power, or displaying a partial or full screen in a mobile device, for example, a cell phone.08-15-2013
20130207958DATA DRIVER AND LIQUID CRYSTAL DISPLAY DEVICE USING THE SAME - A liquid crystal display having data driving apparatus comprising first and second output switches, a charge sharing line, and first and second charge sharing switches. The first output switch switches an electrical connection between a first amplifier providing a positive gradation voltage and a first data line in response to a control signal. The second output switch switches an electrical connection between a second amplifier providing a negative gradation voltage and a second data line in response to the control signal. The first charge sharing switch switches an electrical connection between the first data line and the charge sharing line in response to the control signal. The second charge sharing switch switches an electrical connection between the second data line and the charge sharing line in response to the control signal.08-15-2013
20080259071INFORMATION DISPLAY DEVICE, INFORMATION DISPLAYING METHOD, AND COMPUTER PROGRAM PRODUCT - A display control unit performs a control of displaying first image information on a display unit. An electric-power supply unit converts thermal energy generated from a body temperature of a user into electric power upon the user contacting the electric-power supply unit, and supplies the electric power to the display control unit. A determination unit determines whether the user is in contact with the electric-power supply unit. When it is determined that the user is not in contact with the electric-power supply unit, the display control unit performs a control of rewriting the first image information displayed on the display unit with second image information.10-23-2008
20110193850PIXEL AND ORGANIC LIGHT EMITTING DISPLAY DEVICE USING THE SAME - There is provided an organic light emitting display device for providing a compensation period of a threshold voltage. The organic light emitting display device includes: a scan driver configured to supply a plurality of scan signals to a plurality of scan lines, each of the scan signals having a width greater than two horizontal periods; a data driver configured to supply a plurality of data signals to a plurality of data lines; and a pixel including an organic light emitting diode, a pixel circuit having a first transistor for controlling an amount of current supplied to the organic light emitting diode, and a compensation circuit configured to control a voltage of a gate electrode of the first transistor to compensate for deterioration of the organic light emitting diode; wherein the scan driver is configured to supply a current scan signal which partially overlaps in time with a previous scan signal.08-11-2011
20110193849VOLTAGE REGULATION METHOD - A voltage regulation method is provided and includes the following steps. A plurality of fixed voltages is provided to a gray-level resistor string, and a plurality of gray-level voltages and the fixed voltages are divided into a first voltage group and a second voltage group according to signal-to-noise ratios of the gray-level values. It is to determine whether the regulated fixed voltage is used to regulate a gray-level voltage corresponding to low gray-level value according to different voltage group. When the regulated fixed voltage is used to regulate the gray-level voltage corresponding to low gray-level value, it is determined whether the fixed voltage is regulated again by measuring a luminance value of a gray-level voltage having higher signal-to-noise ratio.08-11-2011
20130135281LCD Device and Method of Driving the LCD Device - The present invention provides a liquid crystal display (LCD) device and a driving method thereof capable of providing an enabling signal to the pixel unit which displaying different grayscales in the current frame signal and the previous frame signal via a plurality of secondary signal lines after determining the current frame signal is not identical with the previous frame signal. And the pixel unit conducts the data voltage outputted from the data line to the liquid crystal capacitor to adjust alignment of liquid crystal molecules in case of the first transistor receiving the scan signal pulse outputted from the corresponding scan line and the second transistor receiving the enabling signal outputted from the secondary signal lines. In this way, power consumption of the LCD device is reduced.05-30-2013
20130207957PIXEL DRIVING CIRCUITS, PIXEL DRIVING METHODS, DISPLAY PANELS AND ELECTRONIC DEVICES - A pixel driving circuit is provided, including first, second, third, fourth, and fifth switching devices and first and second capacitors. The first switching device has a first terminal coupled to a power source voltage, and a control terminal coupled to a first scan signal line. The second switching device has a first terminal coupled to a second terminal of the first switching device, a second terminal coupled between a first node and an emitting device, and a control terminal coupled to a second node. The third switching device has a first terminal coupled to the second node, a second terminal coupled between the first terminal of the second switching device and the second terminal of the first switching device, and a control terminal coupled to a second scan signal line.08-15-2013
20130207956SCAN DRIVING DEVICE FOR a DISPLAY DEVICE AND DRIVING METHOD THEREOF - A scan driving device for a display device includes a plurality of scan drive blocks that are sequentially arranged. Each scan drive block includes a first transistor including a gate electrode connected to a first node to which a gate on voltage is transmitted according to a first clock signal, a first electrode connected to a first power source voltage, and a second electrode connected to an output terminal; a second transistor including a gate electrode connected to a second node to which a signal that is input to an input terminal is transmitted according to the first clock signal, a first electrode connected to a second clock signal input terminal, and a second electrode connected to the output terminal; and a third transistor including a gate electrode connected to the first node, a first electrode connected to the input terminal, and a second electrode connected to the second node.08-15-2013
20130207955DRIVING METHOD OF A DISPLAY DEVICE - A driving method of a display device includes: a display panel having a plurality of first blocks, a data driver applying data voltages to pixels of the plurality of first blocks, and a backlight having a plurality of second blocks respectively corresponding to the plurality of first blocks of the display panel, applying the data voltages to the pixels of the plurality of the first blocks during a plurality of data input periods corresponding to the plurality of the first blocks for one frame by the data driver, and a vertical blank period having no applied date voltage is positioned between the plurality of data input periods.08-15-2013
20100118020DUAL EMISSION ORGANIC LIGHT EMITTING DISPLAY DEVICE AND METHOD OF DRIVING THE SAME - A dual emission organic light emitting display device and method of driving the same. The display device includes a pixel driver and an organic light emitting diode that can display different images on a top surface and a bottom surface and/or a same image on both the top and bottom surfaces. The display device includes a top/bottom selector that receives a driving current from the pixel driver and selectively supplies the driving current to a top organic light emitting diode or a bottom organic light emitting diode. The top/bottom selector includes transistors, which are connected between the pixel driver and the organic light emitting diode and select a top emission operation or a bottom emission operation. Here, the circuit configuration of the pixel driver is reduced so that the dual emission organic light emitting display device can be improved in terms of a layout, an interconnection, and an aperture ratio.05-13-2010
20130207954POWER SUPPLY DEVICE, ORGANIC LIGHT EMITTING DISPLAY DEVICE HAVING THE SAME, AND METHOD OF SUPPLYING POWER - A power supply device includes an SMPS circuit including an electric transformer having first and second stages, the SMPS circuit generating a second stage output voltage using the electric transformer, a power switcher receiving and switching the second stage output voltage to generate a first power voltage having logic high and low levels in one frame, and a PWM controller controlling a voltage level of the second stage output voltage by providing a control signal to the first stage. The first power voltage is simultaneously provided to a plurality of pixels, and a magnitude of the logic low level is increased or decreased according to a magnitude of an image load, where the magnitude of the image load is dependent on a color and a gradation level of an image to be displayed in a next frame.08-15-2013
20130076723IMAGE DISPLAY DEVICE, DRIVING METHOD OF IMAGE DISPLAY DEVICE AND TERMINAL DEVICE - A subpixel is provided with a pixel electrode 03-28-2013
20130076724Stereoscopic Image Display Device and Driving Method for the Same - The present invention is about a stereoscopic image display device and a driving method for the same, the stereoscopic image display device comprising: a display panel configured to display an image; a switchable panel located on the display panel and having a plurality of switchable regions, the switchable panel being configured to convert the image into a 3D image; a voltage applying unit configured to apply voltage to the switchable panel in such a way as to divide each switchable region into a barrier region and a transmitting region; and a controller configured to control the voltage applying unit in such a way as to adjust a position of the barrier region and a width of the barrier region within the switchable region.03-28-2013
20130076720PIXEL GUARD LINES AND MULTI-GATE LINE CONFIGURATION - Data can be written to a sub-pixel by applying a voltage to the sub-pixel's data line. A large change in voltage on a data line can affect the voltages on adjacent data lines due to capacitive coupling between data lines. The resulting change in voltage on these adjacent data lines can give rise to visual artifacts in the data lines' corresponding sub-pixels. Various embodiments of the present disclosure serve to prevent or reduce the appearance of these visual artifacts by inserting guard lines between data lines to reduce the mutual capacitance between data lines. In other embodiments, a pixel having multiple gate lines can be used to selectively turn on and turn off different sub-pixels which, in turn, can reduce or eliminate the appearance of visual artifacts.03-28-2013
20130083001ORGANIC LIGHT-EMITTING DISPLAY DEVICE - An organic light-emitting display device includes: an organic light-emitting panel defined into a plurality of pixel regions which each includes a drive transistor configured to drive an organic light emission element and a load capacitor configured to charge a threshold voltage of the drive transistor; and a controller configured to calculate an offset information on the basis of the threshold voltage and derive a second image signal by reflecting the offset information to a first image signal.04-04-2013
20130207953COMPUTER SYSTEM - A computer system includes a display and a computer device, having a CPU, a peripheral controller, and a setting circuit. The CPU and the peripheral controller respectively include first and second pins coupled to the setting circuit. The setting circuit respectively has the first pin biased with first reference voltage, and has the second pin biased with second reference voltage when the display supports first and second transmission interfaces. The CPU and the peripheral controller respectively provide first display data of the first transmission interface to drive the display in response to the first reference voltage on the first pin, and provide second display data of the second transmission interface to drive the display in response to the second reference voltage on the second pin.08-15-2013
20100073352SEMICONDUCTOR ELEMENT, ELECTRIC CIRCUIT, DISPLAY DEVICE AND LIGHT-EMITTING DEVICE - A current storing circuit capable of having a small area, a simple structure with the small number of devices, a low consumption current operation and high yield in manufacturing is provided. Applying the current storing circuit to the current-driving type of display device such as an OLED display device can improve the aperture rate of pixels and reliability of the display device as well as highly functionalize the display device. The invention is characterized by using a new semiconductor element in a shape of a transistor having plural drains or sources. When the semiconductor elements is used for both of a writing element and a driving element, reading in and storing a current value and outputting the current can be performed by only the two semiconductor elements, so that the area occupied by the devices would be easily reduced significantly.03-25-2010
20100073350DISPLAY WITH REDUCED PARASITIC EFFECTS - Visual artifacts in a display are reduced by moving, to the extent possible, display driver components to the display surface itself, thereby shortening conductor distances and reducing the parasitic effects caused by parasitic resistance of the conductors between the display power supply and the display, and between the stabilizing capacitors and the display. To avoid interference with the device housing, low-profile driver components, including either or both of stabilizing capacitors and power supply terminals, can be provided and bonded to the surface of the display side of the outer layer of the display. Alternatively, the stabilizing capacitors can be formed on the display side in the same way that, e.g., in an LCD display, the transparent electrodes for controlling the liquid crystals are formed.03-25-2010
20130076722DISPLAY APPARATUS - A display apparatus includes a display panel, a gate driver, and a data driver. The display panel includes a plurality of gate lines, a plurality of data lines, and a plurality of pixels connected to the gate lines and the data lines to display an image. The gate driver is configured to apply a gate signal to the gate lines and the data driver is configured to apply a data signal to the data lines. At least one intermediate voltage having a voltage level between a first voltage and a second voltage and a data voltage corresponding to a specific gray scale are sequentially applied to at least one pixel of the pixels as the data signal during a frame period.03-28-2013
20130076721DEVICES AND METHODS FOR ZERO-BIAS DISPLAY TURN-OFF USING VCOM SWITCH - Methods and devices employing zero-bias display turn-off circuitry, including turn-off logic and switching devices, are provided. In one example, a method may include supplying a common voltage output of ground to a common electrode of a pixel of an electronic display, supplying an activation signal to the pixel to activate the pixel, supplying a data signal of ground to a pixel electrode of the pixel, and removing the activation signal from the pixel while the data signal is being supplied to the pixel to store the data signal in the pixel. When the activation signal is removed, the method may include causing the common voltage output being supplied to the common electrode of the pixel to change to a floating value to prevent a kickback voltage from affecting the data signal stored in the pixel.03-28-2013
20130082998DISPLAY DEVICE VOLTAGE GENERATION - A voltage generator circuit comprises a resistor string, a drive mechanism configured to drive a drive signal, a voltage feedback network, and a voltage tap point. The voltage tap point is located along the resistor string. The voltage tap point is configured to be selectively coupled simultaneously with the drive mechanism and the voltage feedback network, such that an output of the voltage tap point is selectively coupled with the drive mechanism via the voltage feedback network.04-04-2013
20130083000PIXEL CIRCUIT, PIXEL CIRCUIT DRIVING METHOD, DISPLAY APPARATUS, AND ELECTRONIC DEVICE - Disclosed herein is a pixel circuit including: a light-emitting device; a constant current drive circuit configured to include a first transistor as a constant current source for supplying a predetermined current to the light-emitting device; a second transistor configured to open/close electrical connection between the first transistor and the light-emitting device; and a switching circuit configured to switch between an on state and an off state of the second transistor by controlling a gate voltage of the second transistor.04-04-2013
20130033479DISPLAY DEVICE FOR ACTIVE STORAGE PIXEL INVERSION AND METHOD OF DRIVING THE SAME - A pixel circuit for a display includes a pixel storage node for storing and presenting a pixel voltage to a pixel display element, a cell storage node for storing the data on the pixel storage node, and a first storage capacitor and a second storage capacitor each including a first electrode and a second electrode. The first electrode of the first storage capacitor is operatively coupled to the pixel storage node and the first electrode of the second storage capacitor operatively coupled to the cell storage node. The second electrode of the first and second storage capacitors is operatively coupled to a respective different one of first and second independent voltage signal lines. The pixel circuit further includes a pixel write circuit configured to write the pixel voltage to the pixel storage node during a data write cycle, and to provide respective voltage signals to the first and second independent voltage signal lines, each of the respective voltage signals being changed during the data write cycle in order to increase or reduce the pixel voltage.02-07-2013
20130038595OPERATING METHOD AND DISPLAY PANEL USING THE SAME - An operating method and a display panel are provided. The method Includes a number steps. A display panel is provided, and has a pixel element, the pixel element including an n-bit memory, n being a positive integer in accordance with image data. The pixel element is driven by using a k-th data voltage, k being smaller than 202-14-2013
20130038594INTERFACE CIRCUIT OF DISPLAY PANEL AND DISPLAY PANEL - The present invention discloses an interface circuit of a display panel and a display panel. The interface circuit of the display panel is connected with a source driver, comprising: a constant current source; a first resistor; a first triode, a gate electrode connected to a first signal input terminal, a source electrode connected to a first terminal of the constant current source, and a drain electrode connected to a first input terminal of a receiving circuit, wherein, the first input terminal of the receiving circuit is connected to a first voltage of the source driver via the first resistor; a second resistor; a second triode, a gate electrode connected to a second signal input terminal, a source electrode connected to a second terminal of the constant current source, and a drain electrode connected to a second input terminal of the receiving circuit, wherein, the second input terminal of the receiving circuit is connected to the first voltage of the source driver via the second resistor. The present invention can effectively reduce the power consumption in a differential signal circuit.02-14-2013
20130038596DISPLAY DEVICE - A display device according to the present invention includes: an organic EL element; an electrostatic holding capacitor; a drive transistor having a gate connected to one electrode of an electrostatic holding capacitor and a source connected to an anode of the organic EL element; another electrostatic holding capacitor having an electrode connected to the other electrode of the one electrostatic holding capacitor; a negative power supply line which determines a potential of a cathode of the organic EL element; and a scanning line drive circuit which controls switching transistors. In a display period, the entire display area of a display unit is caused to start generating photons at once. In a non-display period, the entire display area of the display unit is caused to stop generating photons at once, and the drive transistor is reset.02-14-2013
20100045652Display device and display drive method - A display device includes: a pixel array including pixel circuits arranged in a matrix, each pixel circuit having a light emitting element, a drive transistor, and a storage capacitor storing a threshold voltage of the transistor and an inputted signal value; and a threshold correction operation means for performing a threshold correction operation plural times, which allows the storage capacitor to store the threshold voltage by applying a drive voltage to the transistor in a state where a gate potential of the transistor is fixed in a reference potential before giving the signal value to the storage capacitor. The threshold correction operation is started in a state where the gate potential is made a correction acceleration potential higher than the reference potential only at the threshold correction operation of the first half in the plural threshold correction operations, then, returns the gate potential to the reference potential to be fixed.02-25-2010
20100045651VOLTAGE STABILIZING CIRCUIT AND DISPLAY APPARATUS HAVING THE SAME - A display apparatus includes a display panel, a printed circuit board, a data driver and a gate driver. The data driver includes a digital processor and an analog processor, and receives image data and a data control signal to provide the display panel with a data signal. The printed circuit board includes a first voltage interconnection which supplies a first source supply voltage to the digital processor of the data driver, and a second voltage interconnection electrically isolated from the first voltage interconnection and which supplies a second source supply voltage to the analog processor of the data driver.02-25-2010
20130135282DISPLAY DEVICE - A display device, including a signal controlling unit, a data driving unit, a gate driving voltage generating unit, a gate driving unit, and a display panel. The display panel displays an image during a frame period including a blank period and a display period. The gate driving voltage generating unit receives a control signal and an analog driving voltage. The gate driving voltage generating unit generates boosting-on and boosting-off gate driving voltages based on the analog driving voltage. The gate driving voltage generating unit outputs the boosting-on gate driving voltage during a part of the frame period and the boosting-off gate driving voltage during a remaining of the frame period.05-30-2013
20130033480STEREOSCOPIC IMAGE DISPLAY - A a stereoscopic image display includes: a liquid crystal display panel including a 3D control line to which a 3D control voltage is applied, and a plurality of pixels, each of the pixels being divided into a main pixel portion and an active black stripe; and a 3D control voltage generation circuit that supplies a 3D control voltage to the 3D control line and discharges a voltage of the active black stripe down to a black gray voltage.02-07-2013
20090128537PLASMA DISPLAY DEVICE - There is provided a plasma display device using a driving device for supplying driving signals to a plasma display panel (PDP). In a sustain falling period that at least partially overlaps the rising period of reset signals supplied to scan electrodes formed on the PDP, a voltage supplied to sustain electrodes is gradually reduced and a positive polar voltage is supplied to address electrodes. In driving the PDP, gradually falling signals are supplied to the sustain electrodes in the rising period of the reset signals so that the driving margin of the PDP can be secured. The positive polar voltage is supplied to the address electrodes so that initialization discharge can be stably performed and that the erroneous discharge of the plasma display device can be reduced.05-21-2009
20100128018DISPLAY PANEL DRIVING VOLTAGE OUTPUT CIRCUIT - A driving voltage output circuit for a matrix display panel includes high-side voltage followers and low-side voltage followers. Each voltage follower includes a differential input stage, a control stage, and an output stage. The differential input stage receives non-inverting and inverting inputs and produces first and second potentials. The control stage generates third and fourth potentials from the first and second potentials. The output stage includes three transistors connected respectively to the high-side power supply, the low-side power supply, and an intermediate reference potential, and connected in common to an output terminal. Two of the three transistors are of identical channel type and are controlled by the first and fourth potentials. The third transistor is of the opposite conductive type and is controlled by the third potential.05-27-2010
20130082999METHOD OF DRIVING A DISPLAY PANEL AND DISPLAY APPARATUS FOR PERFORMING THE SAME - A method of driving a display panel includes outputting a data voltage of three-dimensional (“3D”) image data included in a left-eye data frame and a right-eye data frame to the display panel along a scanning direction of a first direction during a first period, blocking the data voltage from being provided to the display panel during a second period and outputting a black data voltage to the display panel during a third period that is less than the first period.04-04-2013
20130027380DISPLAY SYSTEM - A display system including at least one pixel is disclosed. The pixel includes a switching unit and a controlling unit. The switching unit controls a level of a first node. The controlling unit controls a level of a second node. During a first period, the level of the first node equals to a first reference level and the level of the second node equals to a second reference level. During a second period, the level of the first node equals to a third reference level and the voltage difference between the first and the second nodes equals to a threshold voltage of a driving unit. During a third period, the level of the first node equals to a data signal. During a fourth period, the driving unit lights a luminescence unit according to the voltage difference between the first and the second nodes.01-31-2013
20130027383ORGANIC EL DISPLAY APPARATUS AND METHOD OF FABRICATING ORGANIC EL DISPLAY APPARATUS - A method of fabricating an organic EL display apparatus includes: obtaining a representative current (I)-voltage (V) characteristic of a display panel including pixels each having an organic EL device and a driving transistor; dividing the display panel into a plurality of divided regions, and calculating a light-emitting efficiency and an offset luminance value for each of the divided regions calculated by an I-luminance (L) characteristic of the divided region; measuring luminance of light emitted from each of the pixels and calculating an L-V characteristic of each of the pixels; calculating an L-V characteristic of each divided region by dividing each current value of the representative I-V characteristic by light-emitting efficiency, and by adding an offset luminance value; and calculating a correction parameter for each pixel such that the L-V characteristic of each pixel is corrected to the L-V characteristic of the divided region including the pixel.01-31-2013
20130027379DISPLAY DEVICE AND A DRIVING METHOD THEREOF - A display device including a display panel, a gate driver, a data driver and a signal controller. The display panel includes gate lines and data lines, the gate driver is connected to the gate lines, the data driver is connected to the data lines and the signal controller controls the display panel, the gate driver, and the data driver. The signal controller includes a timing controller and a low voltage differential signaling (LVDS) receiving unit. The timing controller includes a frame memory. The display device further includes an analog-to-digital (AD) board including an LVDS transmission unit, wherein the LVDS transmission unit transmits a signal identifying a stopped image or a moving image to the LVDS receiving unit, and in response to the signal identifying the stopped image, the signal controller maintains the display of the same image on the display panel by using the frame memory.01-31-2013
20130027381METHOD AND SYSTEM FOR PROGRAMMING, CALIBRATING AND DRIVING A LIGHT EMITTING DEVICE DISPLAY - A method and system for programming, calibrating and driving a light emitting device display is provided. The system may include extracting a time dependent parameter of a pixel for calibration.01-31-2013
20130027382DISPLAY DEVICE AND METHOD FOR DRIVING DISPLAY DEVICE - A display device includes: a driver including: a scanning line driver; and a signal line driver, in the pixels, a quenched state sequentially starts, for each row, in the rows of the pixels, based on the first pulse of the scanning signal that is input through the scanning line, and light-emission data from the signal line is written on the row of the pixels, based on the second pulse of the scanning signal, the driver supplies the scanning signal and the image signal to the scanning line and the signal line, respectively, such that writing the light-emission data on a first row of the pixels starts before a start of the quenched state in a last row of the pixels, and such that writing the light-emission data on the last row of the pixels ends after a start of a light-emission state in the first row of the pixels starts.01-31-2013
20130027377GATE DRIVER AND DISPLAY DEVICE INCLUDING THE SAME - A gate driver includes stages coupled to each other and outputting gate signals. Each stage includes a node driver, a pull-up unit, a node controller, a first node stabilizer, and a pull-down unit. The node driver outputs a first voltage or a second voltage to a first node in response to a first or a second input signal. The pull-up unit pulls an output terminal to high in response to a voltage of the first node. The node controller outputs an on-voltage to a second node in response to a first clock signal from a third node or a second clock signal from a fourth node. The first node stabilizer stabilizes the first node to an off-voltage in response to a voltage of the second node. The pull-down unit pulls the output terminal to low in response to the voltage of the second node or the second input signal.01-31-2013
20130027378DISPLAY PANEL AND INTEGRATED DRIVING APPARATUS THEREON - A display panel includes: gate and data lines; pixels connected to the gate and data lines; and a stage includes: a pull-up driver including an output terminal of the stage and which outputs a gate-on voltage, an output pull-down unit which pulls down an output terminal of the stage, a reset unit which changes a voltage of a second node into a low voltage based on a voltage of the output terminal of the stage, a first node pull-up unit which changes a first node into a high voltage based on a gate-on voltage from a previous stage, a first node pull-down unit which changes the first node into the low voltage based on the gate-on voltage from a subsequent stage, and a first node reset unit which changes the voltage of the first node into the low voltage based on the voltage of the second node.01-31-2013
20100066718DRIVING DEVICE AND DRIVING METHOD OF PLASMA DISPLAY PANEL, AND PLASMA DISPLAY DEVICE - In a driving device of a plasma display panel including switch circuits (Q03-18-2010
20100328299LIGHT EMITTING DEVICE, DRIVING METHOD OF LIGHT EMITTING DEVICE AND ELECTRONIC DEVICE - By controlling the luminance of light emitting element not by means of a voltage to be impressed to the TFT but by means of controlling a current that flows to the TFT in a signal line drive circuit, the current that flows to the light emitting element is held to a desired value without depending on the characteristics of the TFT. Further, a voltage of inverted bias is impressed to the light emitting element every predetermined period. Since a multiplier effect is given by the two configurations described above, it is possible to prevent the luminance from deteriorating due to a deterioration of the organic luminescent layer, and further, it is possible to maintain the current that flows to the light emitting element to a desired value without depending on the characteristics of the TFT.12-30-2010
20100328295SYSTEM AND METHOD FOR LCD LOOP CONTROL - An LCD controller includes a charge pump for generating a charge voltage responsive to an external voltage and a clock signal. The controller further includes an oscillator for generating the clock signal responsive to an oscillator control signal. An LCD driver voltage circuit generates a plurality of LCD driver voltages for driving segments of an associated LCD display. A loop control circuit within the LCD controller monitors an LCD driver voltage from the LCD driver voltage circuit and generates the oscillator control signal responsive thereto to enable and disable the oscillator.12-30-2010
20120182283SCAN DRIVER AND DRIVING METHOD THEREOF - A display device includes a plurality of scan lines and a scan driver. The scan driver includes a plurality of stages for transmitting a scan signal having a first voltage to the plurality of scan lines, and each of the stages includes a sequential switching unit, a sequential output unit, a concurrent switching unit, and a concurrent output unit. The concurrent output unit includes a first transistor for transmitting a second control signal to the output terminal according to a first control signal during a concurrent driving period before the scan signal is converted from a first level to a second level according to the second control signal, and a gate voltage of the first transistor is controlled by a voltage that is different from the first voltage according to the first control signal.07-19-2012
20120182282Super Low Voltage Driving Of Displays - A display device (07-19-2012
20130050172DISPLAY APPARATUS AND PIXEL VOLTAGE DRIVING METHOD THEREOF - A display apparatus includes a pixel array, a data line and a data driver. The pixel array has adjacent first and second pixels disposed in different rows. The data line transmits first and second pixel voltages to be written into the first and second pixels respectively. The first and second pixel voltages are employed to illustrate a same frame. The data driver is utilized for generating the first and second pixel voltages furnished to the data line based on input image data. The data driver includes a voltage analysis unit and a voltage setting unit. The voltage analysis unit is used for calculating a voltage difference between the first and second pixel voltages, and for comparing the voltage difference with a preset value so as to generate a control signal. The voltage setting unit is utilized for setting the voltage of the data line according to the control signal.02-28-2013
20130050171LIQUID CRYSTAL DISPLAY WHICH CAN COMPENSATE GATE VOLTAGES AND METHOD THEREOF - A method of compensating gate voltages of a liquid crystal display includes generating a first high gate voltage, a second high gate voltage, and a first low gate voltage; generating a first scan start signal and a reference clock; generating and outputting a second scan start signal, a first clock, a second clock, a third clock, a fourth clock, and the first low gate voltage according to the first high gate voltage, the second high gate voltage, the first low gate voltage, the first scan start signal, and the reference clock; driving a plurality of pixels included by a liquid crystal panel according to the second scan start signal, the first clock, the second clock, the third clock, the fourth clock, and the first low gate voltage to improve frame quality displayed by the liquid crystal panel.02-28-2013
20130088479DISPLAY DEVICE - A display device includes: an insulation substrate; a plurality of gate lines on the insulation substrate and divided into a first group and a second group; a plurality of data lines insulated from and intersecting the gate lines; a gate driver which applies a gate-on voltage to the gate lines and operates in one of a first mode and a second mode; and a data driver which applies a data voltage to the data lines, where the first group and the second group of the gate lines are applied with the gate-on voltage when the gate driver is in the first mode, and where the first group of the gate lines is applied with the gate-on voltage and the second group of the gate lines is in an off state when the gate driver is in the second mode.04-11-2013
20130088480DRIVING METHOD FOR DISPLAY DEVICE - A gate driver receiving a low voltage without an appropriate control signal in an initialization step from the time of turn-on of the power of the display device to the time of beginning of normal operation of the display device to previously generate and output a gate clock signal CPV so as to prevent a horizontal line defect from appearing. Thereby, the generated clock signals CKV and CKVB are transmitted to the gate driver such that the gate driver is appropriately controlled and the horizontal line defect is not generated.04-11-2013
20130069928LIQUID CRYSTAL DISPLAY DEVICE, DRIVING METHOD FOR THE LIQUID CRYSTAL DISPLAY DEVICE, AND ELECTRONIC APPARATUS - A liquid crystal display device according to the invention has an effect that burn-in and a flicker do not occur. Dummy pixels are provided around pixels of the liquid crystal display device. A first voltage higher in order than a reference voltage and a second voltage lower in order than the first voltage are applied to a pixel electrode of a liquid crystal device included in the dummy pixel while being temporally shifted. The liquid crystal display device changes, on the basis of an electric current flowing to a second opposed electrode when the first voltage is applied and an electric current flowing to the second opposed electrode when the second voltage is applied, a ratio of effective voltages of a positive voltage and a negative voltage applied to a liquid crystal device included in the pixel that displays an image.03-21-2013
20130069929CIRCUITS FOR CONTROLLING DISPLAY APPARATUS - A display includes an array of light modulators each having a first actuator and a second actuator. A control matrix includes a circuit having a first state inverter having an output coupled to an input of a second state inverter. A data store capacitor is coupled to an input of the first inverter and configured to store a data voltage corresponding to a future pixel state of the pixel. A first update interconnect is coupled to the first state inverter and configured such that altering a voltage applied to the first update interconnect causes the first actuator to respond to the stored data voltage. A second update interconnect is coupled to the second state inverter and configured such that altering a voltage applied to the second update interconnect causes the second actuator to respond to a voltage state of the first inverter.03-21-2013
20110001744Arrangement Comprising a First Electronic Device and a Power Supply Unit and Method for Operating an Electronic Device - An arrangement includes a first electronic device and a power supply unit adapted to provide the first electronic device with electric operating energy from a mains voltage. The first electronic device includes an evaluation unit adapted to switch the first electronic device from an operating state to at least one energy saving state and vice-versa, and a standard interface for connecting the first electronic device to a second electronic device.01-06-2011
20110001743Drive circuit, drive method, liquid crystal display panel, liquid crystal module, and liquid cystal display device - A drive circuit drives an active matrix display section. In at least one embodiment, a COM signal generation section changes, after an end of a selection period of a pixel included in the display section, a voltage V01-06-2011
20130088481STEREOSCOPIC IMAGE DISPLAY - A stereoscopic image display includes a display panel including pixels and a patterned retarder. Each pixel includes a main display unit including a first pixel electrode connected to a data line through a first thin film transistor (TFT) and a first common electrode connected to an upper common line, an auxiliary display unit including a second pixel electrode, which is connected to the data line through a second TFT and is connected to the upper common line through a discharge control TFT, and a second common electrode connected to the upper common line, and a line unit between the main display unit and the auxiliary display unit. The line unit includes a gate line, through which a scan pulse is applied to the first and second TFTs, and a discharge control line, through which a discharge control voltage is applied to the discharge control TFT.04-11-2013
20080297500DISPLAY DEVICE AND METHOD OF DRIVING THE SAME - Provided is a display device including a timing controller configured to generate a pulse of a start pulse signal (STH) once in every two frames. This configuration makes it possible to drive a source driver and a gate driver once in every two frames, and thereby to reduce power consumption. Moreover, when switching from a normal mode to a power saving mode, a personal computer only needs to turn on a power save control signal. Accordingly, it is possible to switch a liquid crystal display device into the power saving mode without causing distortion of a display screen.12-04-2008
20100134471Output driving circuits of output buffers for source driver integrated circuits - An output driving circuit is provided that may reduce power consumption by decreasing static current leakage in a liquid crystal display device. The output driving circuit of an output buffer of a source driver integrated circuit may include: an output driving unit including a pull-up transistor and a pull-down transistor coupled to a source line driving signal output terminal; and a sub output driving unit configured to perform an output driving operation together with the output driving unit during a normal operation period of an active horizontal synchronization signal and configured to be disabled during a period in which the horizontal synchronization signal is inactive in response to a control signal, in order to reduce static current leakage flowing through the output driving circuit. Current leakage is reduced in the inactive period of a horizontal synchronization signal in an output driving circuit, thereby reducing power consumption of a liquid crystal display device.06-03-2010
20100134470Liquid Crystal Display and Source Driving Circuit Thereof - A source driving circuit includes a gamma voltage generator, a common voltage generator and a driver. The gamma voltage generator receives gamma data from a timing controller through reduced swing differential signaling (RSDS) transmission interface to generate corresponding gamma voltages. The common voltage generator receives common voltage data from the timing controller to generate a corresponding common voltage. The driver receives image data from the timing controller through the RSDS transmission interface, the gamma voltages from the gamma voltage generator and the common voltage from the common voltage generator for modifying the image data using the gamma voltages and the common voltage and transmitting the modified image data to a panel of the liquid crystal display.06-03-2010
20130088482METHOD AND SYSTEM FOR DRIVING AN ACTIVE MATRIX DISPLAY CIRCUIT - A method and system for driving an active matrix display is provided. The system includes a drive circuit for a pixel having a light emitting device. The drive circuit includes a drive transistor for driving the light emitting device. The system includes a mechanism for adjusting the gate voltage of the drive transistor.04-11-2013
20090109206PLASMA DISPLAY APPARATUS - A plasma display apparatus is disclosed. The plasma display apparatus includes a plasma display panel including a scan electrode, and a driver that displays an image on the plasma display panel in a frame including a plurality of subfield groups each including a plurality of subfields. The driver controls a voltage magnitude of a reset signal, that is supplied to the scan electrode during a reset period of at least one subfield of the plurality of subfields belonging to each of the plurality of subfield groups of the frame, depending on an average power level (APL).04-30-2009
20090109205MONITORING AND SETTING APPARATUS AND PRODUCTION SYSTEM INCLUDING THE SAME - A monitoring and setting apparatus according to an embodiment of the present invention includes: an obtaining means for obtaining settings information of a monitored apparatus from the monitored apparatus; a display means for displaying the settings information of the monitored apparatus obtained by the obtaining means; an input means for changing the settings information of the monitored apparatus that has been displayed by the display means; and an instruction means for instructing the monitored apparatus to set the settings information of the monitored apparatus that has been changed by the input means. When the obtaining means obtains settings information of a plurality of monitored apparatuses, the display means divides a screen of the display means into a plurality of display regions and displays the settings information of the monitored apparatuses in the respective display regions, the input means can change the settings information of the monitored apparatuses for each monitored apparatus displayed in each display region, and the instruction means instructs each monitored apparatus whose settings information has been changed by the input means to set the changed settings information.04-30-2009
20090303221FLAT DISPLAY PANEL HAVING INTERNAL POWER SUPPLY CIRCUIT FOR REDUCING POWER CONSUMPTION - A flat display employs at least one high voltage different from logic voltages. The display has a voltage detection unit and a drive control signal control unit. The voltage detection unit is used to detect the high voltage. The drive control signal control unit is used to control drive control signals of the flat display in accordance with the detected high voltage. This arrangement eliminates charging currents that are applied to a display panel but have nothing to do on the actual displaying of data, or reactive currents due to unnecessary switching operations, thereby reducing power consumption.12-10-2009
20120218250VCOM AMPLIFIER WITH TRANSIENT ASSIST CIRCUIT - Electronic devices with a V08-30-2012
20120218252DISPLAY DEVICE - A display device in which a pixel voltage is held at low power consumption without any influence from fluctuation in threshold voltage is provided. A liquid crystal capacitor element (Clc) is formed between a pixel electrode (08-30-2012
20120218251DISPLAY APPARATUS, DRIVING METHOD FOR DISPLAY APPARATUS AND ELECTRONIC APPARATUS - Disclosed herein is a display apparatus, including: a pixel array section including a plurality of pixels, a writing transistor, a driving transistor, a first switching transistor, a holding capacitor, and a second switching transistor; a first scanning section configured to drive the writing transistor in a unit of a row of the pixels; a second scanning section configured to drive the switching transistors in synchronism with scanning by the first scanning section; and a third scanning section configured to control the second switching transistors to a non-conducting state within a period after the image signal is written by the writing transistor until the signal writing period of the same row of the pixels ends but to a conducting state within any other period.08-30-2012
20120218249VCOM SWITCHING AMPLIFIER - Certain electronic devices with displays, such as LCDs, are configured to provide a common voltage to a display backplane. The common voltage is supplied by a common voltage application circuit coupled to the display. The common voltage application circuit includes a switching amplifier configured to output the common voltage. The switching amplifier functions as a switching power supply having improved power efficiency compared to conventional common voltage application circuits.08-30-2012
20110007060LIQUID CRYSTAL DISPLAY DEVICE - A liquid crystal display device is provided, which may reduce flicker in all display gray levels. The liquid crystal display device includes a scan line drive circuit, a signal line drive circuit and a common connection line drive circuit. The common connection line drive circuit applies a voltage, the voltage having polarity opposite to polarity of the signal line, to a common connection line corresponding to a liquid crystal element as a selection object in a write period for writing into the liquid crystal element as a selection object, and applies one or multiple voltages, each voltage having a value different from a center value between an upper limit value and a lower limit value of voltages applied to the common connection lines in the write period, to the common connection lines in a holding period after writing into the liquid crystal element as a selection object is performed.01-13-2011
20090040209PLASMA DISPLAY AND DRIVING METHOD THEREOF - In a driver for driving an address electrode in a plasma display, a power recovery switch is coupled between a power recovery capacitor and the address electrode, and a driving switch is coupled between a power source for supplying an address voltage and the address electrode. A grounding switch is coupled between a ground terminal and the address electrode. The power recovery switch, the driving switch, and the grounding switch are formed in one integrated circuit. The address electrode driver turns on the power recovery switch during a first period within a period for varying a voltage at the address electrode from a 0V voltage to a Va voltage and turns on the power recovery switch during a second period within a period for varying the voltage at the address electrode from the Va voltage to the 0V voltage. The power recovery switch is turned on for about 62 ns.02-12-2009
20130057535DISPLAY APPARATUS, METHOD OF DRIVING DISPLAY APPARATUS, AND ELECTRONIC APPARATUS - Disclosed herein is a display apparatus including a pixel array and a driver, the pixel array including rows of scanning lines, rows of feeding lines, columns of signal lines, and a matrix of pixels disposed at the crossings of the scanning lines and the signal lines, the driver including a write scanner for supplying a control signal successively to the scanning lines, a power supply scanner for switching each of the feeding lines between a high potential, a low potential, and an intermediate potential between the high potential and the low potential, and a signal selector for supplying a video signal, which alternately switches between a signal potential and a reference potential, to each of the signal lines.03-07-2013
20130057534LCD Panel and Method for Controlling Voltage Thereof - The present invention discloses an LCD panel, which includes a gate driver, a source driver, a plurality of gate lines and data lines. The gate lines and the data lines define a plurality of pixel units, and each pixel unit includes a TFT, a common electrode, and a pixel electrode. The data line is utilized to charge the pixel electrode. The LCD panel further includes a common electrode line, the common electrode line coupled to the common electrode. The common electrode line is utilized to provide alternating common electrode voltages to the common electrode, so that a voltage of the pixel electrode still approaches a target voltage by which the data line charges the pixel electrode when a gate voltage of the TFT is turned off. The present invention also provides a method for controlling voltages of the LCD panel.03-07-2013
20120306844DISPLAY DEVICE - A driving circuit of a display device includes first to third output signal lines which are continuously arranged, a first transistor that has a source connected to the second output signal line and a drain connected to a first clock signal line, and a second transistor that provides a non-active potential to a gate of the first transistor when a second clock signal becomes the active potential, wherein a circuit that outputs the active potential to the first output signal line and the third output signal line is disposed at an opposite side to a circuit that outputs the active potential to the second output signal line with a display region interposed therebetween, and wherein the gate of the first transistor is connected to the first output signal line and the third output signal line via rectifying circuits.12-06-2012
20120306842LATCHING CIRCUITS FOR MEMS DISPLAY DEVICES - The described latching circuits can be formed using transistors of a single conductivity type. The transistors can be n-type transistors or p-type transistors. The latching circuits include at least one pre-charge transistor and at least one output terminal discharge transistor. Timing schemes are also described for operating the latching circuits. Pixel circuits and display devices that include these latching circuits are also described. The display devices are formed from an arrangement of the latching circuits.12-06-2012
20120306841ELECTRO-OPTICAL DEVICE AND ELECTRONIC APPARATUS - A pixel circuit is disposed in correspondence to an intersection of a scanning line and a data line. The pixel circuit is provided with a wiring for shielding an relay electrode connected to a source of the transistor for controlling a current flowing to a light emitting element from the data line. The wiring has a structure in which an relay electrode located on the same layer as the data line, an relay electrode located on the same layer as the relay electrode, an electrode portion of a conductive layer between the data line and the relay electrode are electrically connected to each other.12-06-2012
20120306840Pixel, Display Device Including the Pixel, and Driving Method of the Display Device - A pixel, a display device including the same, and a driving method thereof. After the anode voltage of an organic light emitting diode (OLED) is discharged and reset, a first voltage corresponding to a data voltage applied to a storage capacitor is transmitted to a compensation capacitor. A voltage corresponding to the threshold voltage of the driving transistor is transmitted to the compensation capacitor. The data voltage is stored according to a data signal corresponding to the storage capacitor. The organic light emitting diode (OLED) emits light according to a driving current flowing to the driving transistor by the voltage stored to the compensation capacitor. Here, the light emitting steps of a plurality of pixels are concurrently generated, and a scan step and the light emitting step are temporally overlapped.12-06-2012
20120188220GATE SIGNAL LINE DRIVE CIRCUIT AND DISPLAY DEVICE - A gate signal line driving circuit includes plural basic circuits, each outputting to a gate signal line a gate signal which is high during a high signal period and low during a low signal period. Each of the basic circuits includes: agate line high voltage application circuit which is turned on in accordance with the high signal period to apply the high voltage to the gate signal line; a gate line low voltage application circuit which is turned on in accordance with the low signal period to apply the low voltage to the gate signal line; and a second gate line low voltage application circuit which is turned on to apply the low voltage to the gate signal line in at least a part of a period between turning off the gate line high voltage application circuit and turning on the gate line low voltage application circuit.07-26-2012
20090295775DRIVING CIRCUIT OF LIGHT EMITTING DEVICE - There is provided a driving circuit of a light emitting device. The driving circuit of a light emitting may include: a DC/DC converter converting an input DC voltage into an output DC voltage; a light emitting device block including a plurality of LED groups connected to an output terminal of the DC/DC converter; a current source circuit unit including a plurality of current sources; a voltage detection unit detecting the output DC voltage of the DC/DC converter; a minimum voltage detection unit detecting a minimum voltage among a plurality of voltages between the plurality of LED groups and the plurality of current sources, respectively; and a single comparator including a first non-inverting input terminal receiving the voltage detected by the voltage detection unit, a second non-inverting input terminal receiving the minimum voltage detected by the minimum voltage detection unit, and an inverting input terminal receiving a predetermined reference voltage.12-03-2009
20110012889ELECTRO-OPTICAL APPARATUS, ELECTRONIC APPLIANCE, AND METHOD OF DRIVING ELECTRO-OPTICAL APPARATUS - An apparatus includes: a first pixel having a first transistor, a first pixel electrode and a first common electrode; a second pixel having a second transistor, a second pixel electrode and a second common electrode; first and second scanning lines connected to the first and second transistors, respectively; a first data line connected to the first and second transistors; common electrode wiring connected to the first and second common electrodes; and a driving circuit. The first transistor's on/off state is selected according to a voltage between the first scanning line and the first data line. The second transistor's on/off state is selected according to a voltage between the second scanning line and the first data line. The driving circuit selects the first transistor's on/off state, then selects the second transistor's on/off state, and then simultaneously changes the first and second pixels' display states.01-20-2011
20110012888POWER-OFF DISCHARGE CIRCUIT, AND SOURCE DRIVER CIRCUIT HAVING THE SAME - A power-off discharge circuit comprises a power voltage detection unit that detects whether a first power voltage for driving a source driver circuit is blocked and generates a discharge control signal, and a discharge unit that discharges a load circuit in a display panel based on the discharge control signal.01-20-2011
20110012887DISPLAY APPARATUS - A display apparatus includes a display panel and a data driving part. The display panel includes pixels, data lines and gate lines. A transverse side of the pixels is disposed adjacent to the data lines extending along a first direction, and a longitudinal side of the pixels is disposed adjacent to the gate lines extending along a second direction. Two adjacent pixels of the pixels disposed adjacent to each other along the second direction are connected to one gate line of the gate lines. The data driving part transmits two-dot-inversed first direction data voltages to pixels disposed along the second direction and two-dot-inversed second direction data voltages to pixels disposed along the first direction.01-20-2011
20110012886Efficient Display Driver - A driver circuit for a display device (e.g., an LCD) omits buffers and a resistive ladder and connects the output of a switched regulator directly to a display device through a selector switch. Voltage inputs for the display device can be selectively coupled to the output of the switched regulator using the selector switch. Each voltage input can be coupled to a capacitor that is charged when the corresponding voltage input is coupled to the high voltage output of the switched regulator. In some implementations, bypass switches are connected between the voltage inputs. If the voltage of a given capacitor is too high, the excess voltage can be transferred or otherwise discharged through the bypass switch to another capacitor storing a lower voltage.01-20-2011
20090267934METHOD AND DEVICE FOR SELECTIVE ADJUSTMENT OF HYSTERESIS WINDOW - The width and location of a hysteresis window of an interferometric modulator may be altered by adjusting various physical characteristics of the interferometric modulator. Thus, depending on the particular application for which the interferometric modulators are manufactured, the width and location of the hysteresis window may be altered. For example, in some applications, reducing the power required to operate an array of interferometric modulators may be an important consideration. In other applications, the speed of the interferometric modulators may be of more importance, where the speed of an interferometric modulator, as used herein, refers to the speed of actuating and relaxing the moveable mirror. In other applications, the cost and ease of manufacturing may be of most importance. Systems and methods are introduced that allow selection of a width and location of a hysteresis window by adjusting various physical characteristics.10-29-2009
20090267933BUFFER AND ORGANIC LIGHT EMITTING DISPLAY USING THE SAME - A buffer and an organic light emitting display using the same that reduces (or prevents) a signal of the organic light emitting display from being delayed by improving an output signal of the buffer. The buffer includes an input unit between a first power source and a second power source having a voltage lower than the first power source, and for receiving an input signal to output a first signal; a first inverter between the first and second power sources, and for receiving the first signal and the input signal to output a second signal obtained by inverting the first signal; a second inverter between the first and second power sources, and for receiving the second signal and the first signal to output a third signal obtained by inverting the second signal; and an output unit coupled between the first power source and a third power source having a voltage lower than the second power source, and for receiving the third signal and the second signal to output an output signal obtained by inverting the third signal.10-29-2009
20090267932Driving Unit - A driving unit comprises a first multiplexer, a second multiplexer, and a plurality of control terminals. The first multiplexer and the second multiplexer individually include an input and a plurality of outputs. Each of the inputs is configured to receive a first polar signal and a second polar signal. Each of the outputs individually couples to one of a plurality odd sub-pixel regions and one of a plurality of even sub-pixel regions. Each of the control terminals receives a control signal so that the first multiplexer and the second multiplexer individually outputs the first polar signal and the second polar signal to one odd sub-pixel region and one even sub-pixel region according to the control signal.10-29-2009
20120223933ELECTROPHORETIC DISPLAY PANEL - The electrophoretic display panel (09-06-2012
20120223932LCD MODULE AND METHOD FOR ADJUSTING RESPONSE TIME PERIOD THEREOF - The present invention relates to a LCD module and a method thereof. The LCD module includes a gate driver, a liquid crystal display panel having a plurality of pixel units, a temperature sensor for generating a temperature sensing signal based on a temperature of the liquid crystal display panel, and a voltage regulator for adjusting scan voltage according to the temperature sensing signal. The gate driver outputs a scan signal with the adjusted scan voltage to the plurality of pixel units. The LCD module can adjust the scan voltage based on a variety of the temperature of the LCD panel to further change current charging the pixel units, shortening a response time period of the LCD module.09-06-2012
20110063280ELECTRO-LUMINESCENCE DISPLAY DEVICE AND DRIVING APPARATUS THEREOF - An electro-luminescence display device includes: pixels provided between data lines and scan lines, each of the pixels including a light-emitting cell driven with a current; and a current controller for temporarily increasing the current for driving the light-emitting cells.03-17-2011
20110063279DISPLAY AND SOURCE DRIVER THEREOF - A pixel circuit has a light emitting diode, a first driving transistor, a second driving transistor, a capacitor, and a switch unit. When a scan signal is asserted, the switch unit couples sources/drains of the second driving transistor respectively to a first and a second source/drain of the first driving transistor, and couples a gate and second source/drain of the first driving transistor together. When the scan signal is de-asserted, the switch unit decouples one of the sources/drains of the second driving transistor from the first/second source/drain of the first driving transistor, and decouples the gate from the second source/drain of the first driving transistor.03-17-2011
20110063278TFT-LCD DRIVING CIRCUIT - A TFT-LCD driving circuit is disclosed. The TFT-LCT driving circuit comprises input terminals, output terminals, and a processing circuit connected between the input terminals and the output terminals, for processing a CPV signal, an OE03-17-2011
20110063277ELECTRONIC PROTECTIVE MEASURES FOR ORGANIC DISPLAYS IN SMALL MEDICAL INSTRUMENTS - A medical instrument is proposed, having an electrical power supply and a display device for visually displaying information. The display device comprises a display with at least one organic light-emitting material and is designed to be supplied with electrical power by means of the electrical power supply. The display device furthermore comprises a drive apparatus, for driving the display, as well as a display driver. The drive apparatus is designed to drive the display in a regular operating mode in order to display the information. The drive apparatus comprises a protective circuit which is designed to monitor an electrical signal, which is provided by the electrical power supply, and to switch the display device to a safe state in the event of any discrepancy of the electrical signal from a standard range.03-17-2011
20130063412ELECTRONIC DEVICE AND DRIVING METHOD OF THE ELECTRONIC DEVICE - According to one embodiment, an electronic device including, an emergency power supply module configured to supply electric power to the display at the time of interruption of a regular power supply, a first communication module configured to perform communication based on a first standard, a second communication module configured to perform communication based on a second standard having a capacity and a transmission speed that are lower than those of the first standard, and a controller configured to drive a display using the emergency power supply module and to switch the communication using the first communication module to the communication using the second communication module.03-14-2013
20130063411IPS PIXEL UNIT, LIQUID CRYSTAL DISPLAY AND IMAGE CONTROL METHOD - An in-plane switch (IPS) pixel unit comprises: a plurality of pixel electrodes, signal lines, voltage switch modules and control switches. The pixel electrodes are divided into at least two pixel electrode regions respectively connected to the signal lines via one voltage switch module; the control switches controls connection with the voltage switch modules respectively; and the signal lines supply voltage signals to the pixel electrodes through the control of the control switches over the voltage switch modules. With the IPS pixel unit, when the display switches from a three-dimensional (3D) displaying mode to a two-dimensional (2D) displaying mode, the aperture ratio of the display remains unchanged, and the display will have a high brightness level and low power consumption; and a situation where the number of available pixels in is decreased to cause a lower resolution and more significant black lines is avoided, the resolution of the display is increased.03-14-2013
20130063413LIGHT-EMITTING DEVICE - In a light-emitting device, supply of current is controlled using a transistor having a normal gate electrode (a first gate electrode) and a second gate electrode for controlling threshold voltage. The light-emitting device comprises one or more switches for selecting conduction or non-conduction between the first gate electrode and a drain terminal of the transistor. When the threshold voltage of the transistor is acquired, the first gate electrode and the drain terminal of the transistor are brought into conduction with the switch, and the threshold voltage of the transistor is shifted by controlling the potential of the second gate electrode.03-14-2013
20090244049Panel and driving controlling method - The present invention provides a panel, including: a plurality of pixel circuits disposed in rows and columns and each including a light emitting element for emitting light in response to driving current, a sampling transistor for sampling an image signal, a driving transistor for supplying the driving current to the light emitting element, and a storage capacitor for storing a predetermined potential; a power supplying section configured to supply a predetermined power supply voltage to the pixel circuits disposed in rows and columns; and a power supply line for connecting all of the pixel circuits disposed in rows and columns and the power supply section to each other.10-01-2009
20090237390DISPLAY DEVICE - A light emitting element has a property in which a current value is varied due to a change in temperature. A display device has a temperature compensation function in order to suppress the variation in current value dues to the change in temperature. The temperature compensation function, which is essential for the present invention has a sensor, a storage means, and a correction means. The sensor has a function of detecting an environmental temperature. The detected temperature is compared with data of voltage-current characteristic versus temperature in the light emitting element which is stored in advance in the storage means. In the correction means, a signal inputted to a pixel or a power source potential supplied to a pixel portion is corrected using an output of the sensor and the data stored in the storage means.09-24-2009
20090237389PICTURE DISPLAYING METHOD AND APPARATUS OF A PERSONAL INFORMATION TERMINAL - The present invention relates to method and apparatus of displaying a picture if a personal information terminal is in power-off mode or in nonuse state when an external AC power is being supplied. The present picture displaying apparatus embedded in a personal information terminal comprises a power supplier for receiving an electric energy from an external power source; a data storage storing picture data; a data displayer for reading and displaying the stored picture data; and a controller checking whether the external power source is supplied through the power supplier if a current operation state is power-off or nonuse state, and controlling the data displayer to read and display the stored picture data, based on the checked result. Owing to the present invention, a personal information terminal presents user's favorite picture or pictures on a displaying unit when in nonuse state under the condition that an external power is supplied, whereby a user can feel sentimental emotion from a dry machine.09-24-2009
20090009506DISPLAY SYSTEM AND POWER CONTROL METHOD THEREOF - A display system is provided. The display system includes a display unit for displaying an image, a support stand for supporting the display unit, a power source unit for supplying power to the display unit, an approaching detection unit that is formed on the support stand to detect an approach of an object, and a control unit for controlling the power source unit by recognizing a predetermined command corresponding to a detection signal from the approaching detection unit.01-08-2009
20090009505Display device - A display device according to the present invention includes a switching regulator control circuit formed of TFTs. A digital switching regulator control circuit is composed of an AD converter circuit, a CPU, a pulse generation circuit or the like. An analog switching regulator control circuit is composed of an error amplifier circuit, a triangle wave generation circuit, a PWM comparator or the like. By integrally forming the switching regulator control circuit on a display device, the problem of the conventional portable information equipment as to the reduction in size and weight can be solved.01-08-2009
20090009504Method of Driving a Display Panel with Depolarization - The method comprises, in addition to emission periods, depolarization periods during which a predetermined depolarization voltage, which exhibits a polarity opposite to the polarity opposite to the voltage applied during the emission periods, is applied and sustained at the control terminal of said driver circuits of the panel, and a reference depolarization voltage, which is different from the reference emission voltage, is applied to the reference electrodes to which reference terminals of the driver circuits are linked. This method makes it possible to use conventional and inexpensive column control means.01-08-2009
20130215096DISPLAY APPARATUS AND METHOD OF DRIVING THE SAME - A method of driving a display apparatus including a plurality of pixels that respectively store a voltage level corresponding to a data signal and respectively include a storage capacitor connected between a pixel electrode and a second common voltage electrode, the method including operations of determining whether image data of a current frame is changed, compared to image data of a previous frame, when the image data of the current frame is changed, storing a voltage level corresponding to the image data of the current frame in the storage capacitor of each of the plurality of pixels, and when the image data of the current frame is not changed, changing a level of a second common voltage applied to the second common voltage electrode of each of the plurality of pixels.08-22-2013
20130162622DISPLAY DEVICE - A display device includes: a power supplying unit which outputs at least one of a high-side output potential and a low-side output potential; a display unit in which pixels are arranged in a matrix and which receives power supply from the power supplying unit; a monitor wire arranged along a column direction of the pixels in the matrix, which has one end connected to at least one pixel inside the display unit, and is for transmitting the high-side potential to be applied to the pixel; and a voltage regulating unit connected to the other end of the monitor wire, which regulates at least one of the high-side output potential and the low-side output potential to be outputted by the power supplying unit, to set a potential difference between the high-side potential and the low-side potential to a predetermined potential difference.06-27-2013
20120113088SHIFT REGISTER, GATE DRIVING DEVICE AND DATA LINE DRIVING DEVICE FOR LIQUID CRYSTAL DISPLAY - A shift register increases a number of thin film transistors for lowering drive and a manner of alternatively applying clock signals every other frame, lowers duty cycle of the thin film transistors for lowering drive, and effectively prevents a biasing effect by the thin film transistors for lowering drive, thereby reliability of the shift register unit is guaranteed.05-10-2012
20120113087CURRENT-DRIVEN-PIXEL CIRCUITS AND RELATED METHODS - Pixel circuits (05-10-2012
20120113086METHOD FOR DRIVING DISPLAY DEVICE - A method for driving a display device in which characteristics of a transistor including an oxide semiconductor can approximately be recovered to characteristics before deterioration is provided. In the method for driving the display device, by which images are displayed with the use of a plurality of frame periods, the display device is driven so that a voltage of 20 V or higher can be applied to a gate of a transistor, which is a driving element, for 1 millisecond or longer in a period, in which any one of scan lines is selected, in each frame period. For a plurality of frame periods, the rows are selected so that a voltage of 20 V or higher is applied to gates of all of the transistors which are driving elements for 1 millisecond or longer, whereby characteristics of the transistor can approximately be recovered to characteristics before deterioration.05-10-2012
20120113084LIQUID CRYSTAL DISPLAY DEVICE AND DRIVING METHOD OF THE SAME - A liquid crystal display (LCD) and a driving method thereof are disclosed. According to some aspects the liquid crystal display (LCD) includes: a display unit including a plurality of pixels arranged in a matrix, a gate line respectively connected to the plurality of pixel rows, and a data line respectively connected to a plurality of pixel columns. The LCD further includes a gate driver configured to generate and sequentially transmit a plurality of gate signals to a plurality of pixel rows through the gate line by row to turn on a switch included in the pixel. The LCD further includes a data driver configured to apply a data voltage according to an image data signal to the pixel during a period in which the switch is turned on; and a common voltage generator configured to generate and apply a common voltage having a polarity that is opposite to the polarity of the data voltage to the pixel. According to some aspects, the period in which the switch is turned on includes a first period and a second period that are separated from each other by a period in which the data voltage is transmitted to at least one pixel row, and during the first period, as a voltage according to a difference between the data voltage transmitted to the pixel and the common voltage applied to the pixel, a voltage for displaying a black image according to a liquid crystal mode of the display unit is stored to the pixel.05-10-2012
20120113083Method of Driving Display Device - A method of driving a display device by using a pixel voltage corresponding to a difference between a common voltage and a data voltage comprises: operations of charging the pixel voltage by the common voltage and the data voltage having opposite polarities; and discharging the pixel voltage in a period where the polarity of the common voltage is reversed.05-10-2012
20120235984DISPLAY PANEL, LIQUID CRYSTAL DISPLAY, AND DRIVING METHOD - A display panel includes: a gate driver (09-20-2012
20120235983SCANNING-SIGNAL-LINE DRIVING CIRCUIT AND DISPLAY DEVICE INCLUDING SAME - In order to supply a low-level potential VSS from a trunk line (09-20-2012
20120235982Low Cost Switching Element Point Inversion Driving Scheme for Liquid Crystal Displays - Displays using a low cost method to implement switching element point inversion driving schemes while using integrated circuits that are designed to implement switching element row inversion or switching element column driving schemes are described. In one display, a first color dot is on a first side of a control line and a second color dot is on a second side of the control line. A first switching element is coupled to the first control line and the first color dot and a second switching element is coupled to the second color dot and the control line. Thus the control line controls color dots on two different rows or two different columns.09-20-2012
20120235981SYSTEM AND METHOD OF SENSING ACTUATION AND RELEASE VOLTAGES OF AN INTERFEROMETRIC MODULATOR - A method for sensing the actuation and/or release voltages of a electromechanical system or a microelectromechanical device include applying a varying voltage to the device and sensing its state and different voltage levels. In one embodiment, the device is part of a system comprising an array of interferometric modulators suitable for a display. The method can be used to compensate for temperature dependent changes in display pixel characteristics.09-20-2012
20120235980POWER CONSUMPTION DETECTION APPARATUS, POWER CONSUMPTION CONTROL APPARATUS, IMAGE PROCESSING APPARATUS, SELF-LUMINOUS DISPLAY APPARATUS, ELECTRONIC DEVICE, POWER CONSUMPTION DETECTION METHOD, POWER CONSUMPTION CONTROL METHOD, AND COMPUTER PROGRAM - Disclosed herein is a power consumption detection apparatus including: a line current calculation section configured to calculate, based on an image signal, a value of a line current consumed by each of horizontal lines; and a power consumption calculation section configured to calculate, on a horizontal line cycle, power consumed by an entire display panel based on the most recent values of the line currents, the values corresponding in number to a vertical resolution.09-20-2012
20120235979LIQUID CRYSTAL DISPLAY SUB-PIXEL WITH THREE DIFFERENT VOLTAGE LEVELS - This present invention provides a liquid crystal display (LCD) device in which the sub-pixel is provided with three different voltage levels, so that image quality is improved without the configuration of additional gate lines. The present invention overcomes the reduction of aperture ratio in conventional LCD devices due to the configuration of additional gate lines. By the present invention, the white washout problem relating to the off-axis viewing angle can be overcome while the aperture ratio is not reduced.09-20-2012
20120235978DISPLAY DEVICE AND DRIVING METHOD APPLICABLE THERETO - A driving method applicable to a display device including multiple display driving circuits, includes: the display driving circuits synchronously receiving a start pulse and generating a synchronous timing signal; a previous display driving circuit sending out a first signal to a rear display driving circuit, so that the rear display driving circuit detects and stores a signal reception delay, the display reception delay denoting a delay between the synchronous timing signal and the first signal received by the rear display driving circuit; after storing the display reception delay, the rear display driving circuit temporarily stopping receiving a system clock signal and temporarily stopping generating the synchronous timing signal; and the previous display driving circuit sending a second X signal to the rear display driving circuit to wake up the rear display driving circuit for preparing to receive a display data.09-20-2012
20120235977ELECTRO-OPTICAL APPARATUS, METHOD FOR DRIVING ELECTRO-OPTICAL APPARATUS, APPARATUS FOR CONTROLLING ELECTRO-OPTICAL APPARATUS, AND ELECTRONIC APPARATUS - When a first data line becomes an H level and a second data line becomes an L level at the time that a scan line is at the H level, a first TFT is turned on and a second TFT is turned off. When the first TFT is turned on, a voltage higher than the voltage of a common electrode is applied to a pixel electrode, so that a pixel is displayed in black. When the first data line becomes the L level and the second data line becomes the H level at the time that the scan line is at the H level, the first TFT is turned off and the second TFT is turned on. When the second TFT is turned on, a voltage lower than the voltage of the common electrode is applied to the pixel electrode, so that a pixel is displayed in white.09-20-2012
20120235976SYSTEM AND METHOD FOR PROVIDING POSITIVE AND NEGATIVE VOLTAGES FROM A SINGLE INDUCTOR - This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for providing positive and negative voltages of a power supply. In one aspect, the power supply includes an inductor having a first end coupled via a source switch to a voltage source and coupled via a first plurality of output switches to a respective plurality of negative outputs and a second end coupled via a ground switch to a ground potential and coupled via a second plurality of output switches to a respective plurality of positive outputs and a controller adapted to configure the switches into at least one of multiple configurations.09-20-2012
20130127813DISPLAY DEVICE - The present invention provides a display device. The display device comprises: a timing controller, having a first number of output points; and a second number of source drivers, coupled to the first number of output points of the timing controller, respectively; wherein the first number is equal to the second number. The display device has higher resolution and fewer control pins between a timing controller and a source driver thereof. In addition, the display device provided by the present invention comprises the de-skew operation for minimizing the data and clock skew issue under high speed operation in prior art and the error bit check operation for avoiding display failure caused by error transmission.05-23-2013
20130162618OUTPUT VOLTAGE STABILIZATION CIRCUIT OF DISPLAY DEVICE DRIVING CIRCUIT - The present invention relates to an output voltage stabilization circuit. Specifically, the present invention relates to an output voltage stabilization circuit of a display device driving circuit, which generates a reference current dependent on a high source voltage using a current source independent of a magnitude of the high source voltage, generates a reference current dependent on a low source voltage using a current source independent of a magnitude of the low source voltage, and then generates a control signal by comparing the magnitudes to each other, whereby the output voltage stabilization circuit may stabilize an output voltage regardless of an order in which the low source voltage and the high source voltage are turned off in a circuit using both the low source voltage and the high source voltage.06-27-2013
20130162619DISPLAY APPARATUS AND METHOD OF REPAIRING THE SAME - A display apparatus and a method of repairing a display apparatus are disclosed. According to one aspect, the display includes a plurality of unit pixels each including a plurality of sub pixels, scan lines branching off a scan wire in a first direction for each of the plurality of unit pixels and connecting the plurality of sub pixels emitting the same color as that of a neighboring unit pixel, data lines extending in a second direction orthogonal to the first direction and connected to the plurality of sub pixels, a first power supply line extending in the second direction and connected to the plurality of sub pixels, and second power supply lines extending in the first direction and connected to the first power supply line.06-27-2013
20130162620LIGHT EMITTING DISPLAY DEVICE - Disclosed is a light emitting display device capable of minimizing a current driving capability deviation among driving switching elements. The light emitting display device includes pixels each including a first TFT for supplying data voltage to a first node in response to a scan signal, a second TFT for forming a current path between first and second nodes in response to an emission control signal, a driving TFT for forming a current path between a first driving voltage supply line and a third node in accordance with a voltage level of the second node, a third TFT for supplying a reference voltage to a fourth node in response to a sensing signal, a fourth TFT for supplying an initialization voltage to the third node in response to an initialization signal, and a fifth TFT for supplying the reference voltage to the second node in response to the initialization signal.06-27-2013
20130162621DISPLAY DEVICE AND DRIVING METHOD OF THE DISPLAY DEVICE - A display device includes a plurality of pixels each including a mechanical shutter. The display device electrically controls the position of the mechanical shutter to provide image display. Each of the pixels includes a pixel circuit for electrically controlling the position of the mechanical shutter. The pixel circuit includes a first control electrode and a second control electrode provided as a pair with respect to the mechanical shutter; a first mean for applying a prescribed control voltage to the first control electrode and the second control electrode to put the mechanical shutter and the first control electrode or the second control electrode into contact with each other; and a second mean for, in a state where the mechanical shutter is at a stop, decreasing a potential difference between the mechanical shutter and the first control electrode or the second control electrode which is in contact with the mechanical shutter.06-27-2013
20110043513DEVICE SUBSTRATE, LIGHT EMITTING DEVICE AND DRIVING METHOD OF LIGHT EMITTING DEVICE - A light emitting device comprising a light emitting element and a first transistor and a second transistor controlling current to be supplied to the light emitting element in a pixel; the first transistor is normally-on; the second transistor is normally-off; a channel length of the first transistor is longer than a channel width thereof; a channel length of the second transistor is equal to or shorter than a channel length thereof; gate electrodes of the first transistor and the second transistor are connected to each other; the first transistor and the second transistor have the same polarity; and the light emitting element, the first transistor and the second transistor are all connected in series.02-24-2011
20110032243DISPLAY DEVICE OF ACTIVE MATRIX TYPE - A display device of active matrix type allows reducing display brightness non-uniformity that is caused by initial variation and fluctuation over time in a driving transistor for emissive elements in pixel circuits. The display device includes pixel circuits, a measurement circuit and a gradation voltage supplying circuit. Each pixel circuit includes the driving transistor and an input circuit. The measurement circuit includes a constant current supplying circuit for generating and supplying one or more constant currents to the input circuit of the pixel circuits in a time division manner. The measurement circuit A/D-converts output voltages of the constant current supplying circuit and calculates data relating to electron mobility and threshold value of the driving transistor. The gradation voltage supplying circuit supplies to the pixel circuits a corrected gradation voltage, which is data corrected on the basis of data calculated from the measurement circuit.02-10-2011
20110032241LIQUID CRYSTAL DISPLAY - A liquid crystal display includes a liquid crystal display panel on which a plurality of first units each including at least one liquid crystal cell and a plurality of second units each including at least one liquid crystal cell are positioned in a display area and data line and gate lines cross one another, a common voltage generation unit generating first and second common voltages, a plurality of first longitudinal common lines that supply the first common voltage input through a plurality of first input units to each of first common electrodes of the first units, and a plurality of second longitudinal common lines that supply the second common voltage input through a plurality of second input units to each of second common electrodes of the second units.02-10-2011
20110096059DISPLAY DEVICE AND METHOD OF DRIVING THE SAME - Switching TFTs are controlled to a conducting state and a switching TFT to a non-conducting state, to provide a potential according to a threshold voltage to a gate terminal of a driving TFT. Then, in at least one embodiment, with the TFT maintaining the conducting state, a potential of a data line Sj is changed from a reference potential Vpc to a data potential Vdata to place the TFT in a conducting state. At this time, a current Ia flows and thus the gate terminal potential of the TFT rises. The higher the mobility of the TFT, the larger the amount of change in gate terminal potential and the smaller the current flowing through an organic EL element upon light emission. By this, a current that is not affected by variations in the threshold voltage of the TFT nor by variations in the mobility of the TFT flows through the organic EL element. Thus, in a current-driven type display device, variations in both the threshold voltage and mobility of a drive element are compensated for.04-28-2011
20130021317LIQUID CRYSTAL DISPLAY DEVICE AND METHOD FOR DECAYING RESIDUAL IMAGE THEREOF - By way of enabling a reset signal while turning off a liquid crystal display, a method for decaying residual image of the liquid crystal display is capable of setting the corresponding gate signal of each of a plurality of gate lines of the liquid crystal display based on the reset signal being enabled. Accordingly, enhanced discharging processes on all the storage units of the liquid crystal display for fast decaying residual image can be performed via the data switches of the liquid crystal display turned on by the gate signals being set. The reset operation for performing discharging processes in response to the reset signal can be carried out based on a reset circuit for setting all the gate signals to become high-level signals, or based on a charging/discharging module for furnishing a high-level voltage directly to all the gate lines.01-24-2013
20110279441Display Device and Driving Method of the Same, and Electronic Apparatus - The brightness of a light emitting element varies when changes in ambient temperature or changes with time occur. In view of this, the invention provides a display device where the influence of variations in the current value of the light emitting element due to changes in ambient temperature and changes with time can be suppressed. The display device of the invention includes a monitoring element that is driven with a constant current, and a voltage applied to the monitoring element is detected and inputted to a light emitting element. In other words, the monitoring element is driven with a low current, and a voltage applied to the monitoring element is inputted to the light emitting element such that the light emitting element is driven with a constant current.11-17-2011
20110279438BUFFER CIRCUIT - A buffer circuit having high slew rate is provided. The buffer circuit is provided, which includes a plurality of transistors having the same conductivity type and a capacitor and whose gain is determined depending on the gain of all the plurality of transistors. A buffer circuit having high driving capability and high gain of a high-frequency component can be provided. Such a buffer circuit has also high slew rate. The plurality of transistors having the same conductivity type in the buffer circuit may be either p-channel transistors or n-channel transistors.11-17-2011
20110279440CIRCUIT FOR AMPLIFYING A DISPLAY SIGNAL TO BE TRANSMITTED TO A REPAIR LINE BY USING A NON-INVERTING AMPLIFIER AND LCD DEVICE USING THE SAME - A circuit for amplifying a display signal transmitted to a repair line by using a non-inverting amplifier is disclosed, which comprises a voltage follower, a non-inverting amplifier, a repair line, a thin film transistor (TFT) and a liquid crystal (LC) capacitor. The voltage follower is electrically connected to a data driver chip to thereby provide a display signal to the non-inverting amplifier. The non-inverting amplifier amplifies the display signal to thus obtain an amplified display signal, and transmits the amplified display signal to the TFT and the LC capacitor through the repair line. The amplified display signal is kept at a desired voltage level when the LC capacitor receives the amplified display signal.11-17-2011
20110279437Organic light emitting display and driving method thereof - An organic light emitting diode (OLED) display and a driving method thereof include an OLED, a driving transistor supplying a driving current to the OLED, a data line transmitting a data signal to the driving transistor, a first switch including a first electrode connected to one electrode of the OLED and a second electrode connected to the data line, and a second switch including a first electrode connected to the data line and a second electrode connected to the gate electrode of the driving transistor. The first switch is turned on such that a predetermined first current is transmitted to the OLED, the voltage of one electrode of the OLED is received through the data line, the deterioration degree of the OLED is detected according to the transmitted voltage, and the data signal transmitted to the data line is compensated according to the detected deterioration.11-17-2011
20110279436Display device and driving method thereof - An organic light emitting diode (OLED) display includes a display unit including a plurality of pixels, a plurality of scan lines, and a plurality of data lines, a data driver transmitting a plurality of data signals to the plurality of data lines, a scan driver transmitting a plurality of scan signals to the plurality of scan lines, a compensation controller supplying a predetermined first current to each organic light emitting diode in each of the plurality of pixels during a sensing period for measuring a driving voltage of the organic light emitting diode for each of a plurality of pixels, receiving the driving voltage of the organic light emitting diode supplied with the first current, and outputting measuring data for the transmitted driving voltage; and a signal controller compensating an input video signal according to the measuring data to generate image data. The compensation controller is separate from and external to the data driver.11-17-2011
20110292023METHOD OF PROCESSING DATA AND DISPLAY APPARATUS PERFORMING THE METHOD - A display apparatus includes a display panel, a data processor, a data driver, and a gate driver. The display panel displays images. The data processor generates at least one interpolated frame data by using a first motion vector calculated by a plurality of frame data, and generates a current frame compensation data by using the current frame data, an adjacent frame data adjacent to the current frame and the interpolated frame data. The data driver outputs a data voltage corresponding to the current frame compensation data to the display panel. The gate driver outputs a gate signal to the display panel in synchronized with an output of the data voltage.12-01-2011
20110292024Mode Conversion Method, And Display Driving Integrated Circuit And Image Processing System Using The Method - According to an example embodiment, a display driving integrated circuit (IC) includes a timing controller and a plurality of source drivers. The timing controller is configured to output a plurality of signals to the plurality of source drivers, and at least one of the timing controller and the plurality of source drivers operates in a power down mode in at least one of an initializing period, a data transmission period, and a vertical blank period. According to an example embodiment, a mode conversion method used in a display driving IC includes switching between a normal mode to a power down mode in response to a standby control signal. The power down mode is implemented on at least one of a timing controller and a plurality of source drivers included in the display driving IC in at least one of an initializing period, a data transmission period, and a vertical blank period.12-01-2011
20120287112Driving Circuit of Liquid Crystal Display - A driving circuit of a liquid crystal display includes: a timing controller to output a gate control signal and a data control signal to control driving of a gate driving unit and a data driving unit and to output digital video data; a pair of gate driving units to be alternately driven by using at least one frame as a period to supply gate signals to gate lines of a liquid crystal panel in response to the gate control signal; and a data driving unit to supply pixel signals to data lines of the liquid crystal panel in response to the data control signal. Degradation of characteristics of transistors constituting each gate driver can be prevented.11-15-2012
20100171734System and Method for Extending Operating Time of an Electronic Device - A system and method for extending operating time of an electronic device is disclosed. A battery power module provides power to a display module. A battery capacity detection module detects battery capacity of the battery power module. The pixels of the display module are then individually activated or deactivated according to the detected battery capacity.07-08-2010
20120287113LIQUID CRYSTAL DISPLAY DEVICE, MOBILE DEVICE, AND METHOD FOR DRIVING LIQUID CRYSTAL DISPLAY DEVICE - A liquid crystal display device (11-15-2012
20110261046SYSTEM AND METHOD FOR PIXEL-LEVEL VOLTAGE BOOSTING - This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for displaying an image using voltage shifting. In one aspect, a display device includes an array of display elements, each display element configurable into one of a plurality of states upon application of one of a plurality of voltages, and an array of voltage shifters, each voltage shifter associated with one or more of the display elements and configured to receive at least one input voltage from a display driver circuit and output at least one output voltage different than the input voltage to the associated one or more display elements. The voltage shifters can include, for example, at least one of an amplifier, a differential amplifier, an operational amplifier, a charge pump, a level shifter and a digital-to-analog converter.10-27-2011
20110128277OPERATIONAL AMPLIFIER AND LIQUID CRYSTAL DRIVE DEVICE USING SAME, AS WELL AS PARAMETER SETTING CIRCUIT, SEMICONDUCTOR DEVICE, AND POWER SUPPLY UNIT - The operational amplifier according to the present invention has at least one differential input part for generating a voltage signal corresponding to an electric potential difference between a positive-phase input signal and a negative-phase input signal by using a differential pair configured from a pair of transistors; an output part for generating and outputting an output signal of a logic level corresponding to the voltage signal generated by the differential input part; at least one auxiliary current generator for detecting a sudden change in the positive-phase input signal or the negative-phase input signal and generating an auxiliary current; and a drive current generator for adding together a predetermined reference current and the auxiliary current and generating a drive current of the differential input part.06-02-2011
20130009937POWER DEVICE CAPABLE OF IMPROVING FLICKER OF A LIQUID CRYSTAL DISPLAY, LIQUID CRYSTAL DISPLAY CAPABLE OF IMPROVING FLICKER, AND METHOD THEREOF - A power device capable of improving a flicker of a liquid crystal display includes a direct current (DC) voltage/direct current (DC) voltage converter, a common voltage circuit, and a clamper. The DC voltage/DC voltage converter is used for generating a DC low gate voltage. The common voltage circuit receives a polarity reversion signal generated by a timing control circuit, and generates an alternating current (AC) common voltage according to the polarity reversion signal. The clamper is coupled to the DC voltage/DC voltage converter and the common voltage circuit for receiving the DC low gate voltage and the AC common voltage, outputting the AC common voltage and outputting an AC low gate voltage according to the DC low gate voltage and the AC common voltage. A display panel improves the flicker according to the AC low gate voltage.01-10-2013
20090309863DISPLAY DEVICE AND METHOD OF DRIVING THEREOF - A display device includes plural scan lines, plural data lines intersecting the of scan lines, plural discharge lines for the respective scan lines; and plural pixel circuits for respective intersections of the scan lines and the data lines. Each of the pixel circuits includes a driving transistor, a first diode in which the cathode is connected to a power supply voltage line and the anode is connected to the source of the driving transistor, a retention capacitor connected between the gate and the source of the driving transistor, a selection transistor in which one of the drain and the source being connected to a data line and the other being connected to the gate of the driving transistor, and a second diode in which the cathode is connected to a discharge line and the anode is connected to the source of the driving transistor.12-17-2009
20090309862DATA DRIVER AND DISPLAY APPARATUS HAVING THE SAME - In a data driver, an inverter inverts a first data signal from a first group of data signals. A converter includes first and second converting circuits. The first converting circuit converts a second data signal included from second group of data signals into a first gamma voltage. The second converting circuit has a circuit configuration inverted with respect to the first converting circuit. The second converting circuit converts the inverted first data signal into a second gamma voltage. An output buffer stores the first and second gamma voltage outputs from the converter and then outputs them. Thus, although gamma voltage is interfered from the coupling between a signal line and a gamma voltage line, a user can have normal images regardless of s the gamma voltage variation. The present invention relates to charge-trapping memories in the application of display panels.12-17-2009
20120287110LIQUID CRYSTAL DISPLAY DEVICE, DRIVE METHOD OF LIQUID CRYSTAL DISPLAY DEVICE, AND ELECTRONIC DEVICE - In a liquid crystal display device, an in-phase signal or a reversed phase signal of a signal supplied to a counter electrode is supplied to a source bus line during a video signal unwritten period, where (i) a video signal written period represents a period during which a voltage is applied to a pixel electrode in accordance with a video signal to be supplied to the source bus line and (ii) the video signal unwritten period represents a period between end of the data written period and start of a next data written period. This allows an electronic potential difference between the source bus line and the counter electrode to be kept constant. It is therefore possible to attain a liquid crystal display device excellent in its display quality by preventing flickers from being generated between a source bus line and a counter electrode.11-15-2012
20120001891ACTIVE MATRIX TYPE DISPLAY APPARATUS - A display apparatus includes a capacitor which is provided on each of the pixels and stores the data signal while a first terminal of the capacitor is connected to a control electrode of the driving transistor, an application voltage generating unit which generates an application voltage to a second terminal of the capacitor, and a capacitor voltage adjusting unit which adjusts an application voltage to the second terminal of the capacitor.01-05-2012
20120105427DISPLAY DEVICE05-03-2012
20120105425DISPLAY DEVICE - Provided is a display device capable of improving the display quality by suppressing the influence of a difference in hold voltage in a pixel circuit occurring between forward scanning driving and backward scanning driving. The display device includes: a data signal line; a plurality of pixel circuits; a plurality of gate signal lines; a gate signal line driving circuit for performing any one of forward scanning driving and backward scanning driving and performs gate overlapping driving; a data signal line driving circuit; and a reference voltage line driving circuit for supplying a reference voltage. The reference voltage line driving circuit selects and supplies a reference voltage for forward direction and a reference voltage for reverse direction, during the forward scanning driving and the backward scanning driving, respectively.05-03-2012
20120105422ADJUSTMENT METHOD OF LCD OVERDRIVE VOLTAGE AND DEVICE THEREOF - Disclosed are an adjustment method of an LCD (Liquid Crystal Display) overdrive voltage and the device. The adjustment method comprises steps below: locating a transistor at a position capable of sensing a temperature of an LCD panel; providing a constant current source to a drain of the transistor and a conducting voltage to the transistor, and a voltage difference between a source and a gate changing according to a temperature changing of the LCD panel; receiving voltages of the source and the gate of the transistor to calculate a voltage difference therebetween and outputting an amplified value of the voltage difference by an error amplifier; receiving the amplified value of the voltage difference and outputting corresponding binary signals by an analog to digital converter; providing a selector storing a plurality of overdrive voltages for selecting different overdrive voltages according to the different binary signals to adjust the LCD overdrive voltage.05-03-2012
20120105420Organic Light Emitting Display - An organic light emitting display includes common coupling units at crossing regions of scan lines and data lines; first pixels at the crossing regions and positioned on an ith horizontal line to be coupled to the common coupling units positioned at the same crossing regions, wherein i is a positive integer; second pixels at the crossing regions and positioned on an (i+1)th horizontal line to be coupled to the common coupling units positioned at the same crossing regions; first control lines coupled to the first pixels; and second control lines coupled to the second pixels.05-03-2012
20110285691VOLTAGE COMPENSATION TYPE PIXEL CIRCUIT OF ACTIVE MATRIX ORGANIC LIGHT EMITTING DIODE DISPLAY DEVICE - A voltage compensation type pixel circuit of an AMOLED display device includes a driving transistor serially connected to a light emitting element between high-potential and low-potential power lines to drive the light emitting element in response to a voltage supplied to a first node, a first program transistor for supplying a data voltage of a data line to a second node in response to a scan signal of a scan line, a second program transistor for supplying a reference voltage from a reference voltage supply line to the first node in response to the scan signal of the scan line, a merge transistor for connecting the first and second nodes in response to a merge signal of a merge line, a storage capacitor connected between a third node and the second node interposed between the driving transistor and the light emitting element to store a voltage which corresponds to the data voltage in which the threshold voltage is compensated, and first and second reset transistors for initializing at least two of the first, second, and third nodes to an initialization voltage of an initialization voltage line in response to a reset signal of a reset line.11-24-2011
20110285690ESD PROTECTION CIRCUIT AND DISPLAY APPARATUS USING THE SAME - An ESD protection circuit comprises three transistors and two voltage dividers. The two source/drain terminals of a first transistor are electrically coupled to a first power line and a second power line respectively. The two source/drain terminals of a second transistor are electrically coupled to the first power line and a gate terminal of the first transistor respectively. The two source/drain terminals of a third transistor are electrically coupled to the gate terminal of the first transistor and the second power line respectively. A first voltage divider supplies a first voltage to a gate terminal of the second transistor according to a potential difference between the first power line and the second power line. A second voltage divider supplies a second voltage to a gate terminal of the third transistor according to the potential difference between the first power line and the second power line.11-24-2011
20110285693DRIVING METHOD FOR REDUCING IMAGE STICKING - A driving method with reducing image sticking effect is disclosed. The driving method includes applying a voltage on the data lines for trapping impurities crossing the data lines and lowering the degree of the image sticking effect, and applying different asymmetric waveforms to different data lines for trapping impurities crossing the data lines and lowering the degree of the image sticking effect.11-24-2011
20110285692Display apparatus and driving method therefor, and electronic device - After a sampling transistor is turned ON at a first timing when a control signal has risen, during a sampling period from a second timing when a video signal has risen from a reference potential to a signal potential to a third timing when the control signal has fallen and is turned OFF, the sampling transistor samples and writes the signal potential in a holding capacitance, and negatively feeds back a current flowing into a drive transistor during the sampling period to the holding capacitance and applies mobility correction of the drive transistor on the written signal potential. A signal driver adjusts the second timing for the video signal supplied to respective signal lines to correct a backward shift of the third timing due to a transmission delay along a scanning line of the control signal output from the control scanner.11-24-2011
20110298783LIQUID CRYSTAL DISPLAY PANEL AND DISPLAY APPARATUS HAVING THE SAME - A liquid crystal display panel includes n-number of gate lines, (m+1)-number of data lines and (m×n)-number of pixels, wherein the ‘n’ and ‘m’ are natural numbers. The gate lines are extended in a first direction. The data lines are extended in a second direction that is substantially perpendicular to the first direction. The first and last data lines are electrically connected to each other. The pixels are arranged in a matrix shape. M-number of the pixels is arranged along the first direction, and n-number of the pixels is arranged along the second direction. A pixel electrode of the pixels arranged in the second direction are electrically connected to left and right data lines alternately to enhance a display quality and reduce power consumption.12-08-2011
20110298782ORGANIC ELECTROLUMINESCENT DISPLAY AND METHOD OF DRIVING THE SAME - An organic electroluminescent display and method of driving the display are disclosed. The display includes a power supply voltage generator which generates power voltages according to both a temperature of the display and a luminance level setting.12-08-2011
20110298780REFERENCE VOLTAGE GENERATION CIRCUIT, POWER SOURCE DEVICE, LIQUID CRYSTAL DISPLAY DEVICE - A reference voltage generation circuit of the disclosure includes a first amplifier circuit and a second amplifier circuit. The first amplifier circuit includes a first input stage including two npn transistors or two NMOS transistors having base terminals or gate terminals to which a variable voltage and a predetermined lower limit voltage are inputted. A first output stage includes a pnp transistor or a PMOS transistor having an emitter terminal or a source terminal connected to an output terminal of a reference voltage. A first amplifier stage controls the first output stage for equalizing the higher one of the variable voltage and the lower limit voltage with the reference voltage. The second amplifier circuit includes a second input stage including two npn transistors or two NMOS transistors having base terminals or gate terminals to which the reference voltage and a predetermined higher limit voltage are inputted, a second output stage includes a pnp transistor or a PMOS transistor having an emitter terminal or a source terminal connected to an output terminal for the reference voltage, and a second amplifier stage to control the second output stage for equalizing the reference voltage with the higher limit voltage.12-08-2011
20110298779Electrophoretic Device and Driving Method Thereof - A driving method for driving an electrophoretic display device is provided. The electrophoretic display device comprises a plurality of scan lines. When scanning a frame of a first set of frames, the plurality of scan lines are sequentially enabled from top to bottom. When scanning a frame of a second set of frames, the plurality of scan lines are sequentially enable from bottom to top.12-08-2011
20110298778Driving Method, Driving Module and Liquid Crystal Display Device - A driving module for a liquid crystal display device with a dual-gate structure includes a data line signal processing unit, for generating a plurality of data driving signals, and a control unit, for shifting a common voltage and the plurality of data driving signals by a specific period relative to a horizontal synchronization signal. The common voltage is an AC common voltage.12-08-2011
20120098819IMAGE DISPLAY DEVICE - An image display device includes a laser source for emitting a laser beam, an image forming element which uses the laser beam to emit image light for displaying an image, a first diffraction element for diffracting the image light, and a controller for controlling a display position of the image on the basis of a wavelength of the laser beam and a temperature of the first diffraction element.04-26-2012
20120098818LIQUID CRYSTAL DISPLAY DEVICE AND DRIVING METHOD OF THE SAME - A liquid crystal display device includes a liquid crystal panel; a gamma voltage supplying unit establishing a gamma voltage corresponding to each gray level according to a predetermined T-V curve; and a data driving unit changing digital image data into analog image data using the gamma voltage and outputting the analog image data to the liquid crystal panel, wherein the gamma voltage corresponding to a black level is configured to have a value within a range of 0 V to 0.005 V.04-26-2012
20120098817ELECTRO-PHORETIC DISPLAY APPARATUS AND DRIVING METHOD THEREOF - A driving method for an electro-phoretic display apparatus is disclosed. The method includes generating a common voltage by a common voltage generator held at a first voltage level before a polarity transfer, generating the common voltage held at a second voltage level when the polarity transfer starts during a first timing period, and generating the common voltage transfers held at a third voltage level during a second timing period after the first timing period, in which the second voltage level is between the first and the third voltage levels.04-26-2012
20120098816Liquid Crystal Display and Driving Method Thereof - An LCD and a driving method thereof include: data writing for applying a common voltage and a data voltage to a plurality of pixels; and sustaining for applying a shifted common voltage shifted by a predetermined level from the common voltage to the plurality of pixels for a sustain period during which the plurality of pixels emit light, corresponding to the data voltage. The shifted common voltage is shifted to an opposite polarity of a polarity of a gate-off voltage applied to the plurality of pixels to float the plurality of pixels. During a sustain period, a gate-source voltage of the switching transistor can be increased, and accordingly an influence due to the leakage current can be minimized, thereby preventing image deterioration. Further, since capacitance of the sustain capacitor can be reduced so that power consumption of the LCD can be reduced.04-26-2012
20120098815LIQUID CRYSTAL DISPLAY DEVICE AND METHOD FOR DRIVING THE SAME - A liquid crystal display device and a method for driving the same are disclosed. The liquid crystal display device includes a liquid crystal panel, a gate driver unit, a clock generator, and a temperature compensation unit. The liquid crystal panel includes a pixel array. The gate driver unit is utilized for generating a plurality of driving signals to drive the pixel unit. The clock generator is electrically coupled to the gate driver unit. The temperature compensation unit is electrically coupled to the gate driver unit and the clock generator. The temperature compensation unit is utilized for adjusting an output of the clock generator to compensate the driving signals of the gate driver unit according to a temperature variance.04-26-2012
20120098814LIQUID CRYSTAL DISPLAY DEVICE AND METHOD FOR DRIVING THE SAME - A liquid crystal display device and a method for driving the same are disclosed. The liquid crystal display device includes a liquid crystal panel, a gate driver unit, a clock generator, and a temperature compensation unit. The liquid crystal panel includes a pixel array. The gate driver unit is utilized for generating a plurality of driving signals to drive the pixel unit. The clock generator is electrically coupled to the gate driver unit. The temperature compensation unit is electrically coupled to the gate driver unit and the clock generator. The temperature compensation unit is utilized for adjusting an output of the clock generator to compensate the driving signals of the gate driver unit according to a temperature variance.04-26-2012
20090201283SOURCE DRIVER OF LCD PANEL - A source driver performs inversion driving of data lines of a liquid crystal panel. For every two adjacent data lines, there are provided a high-side amplifier HAMP which generates a driving voltage of a first polarity and a low-side amplifier LAMP which generates a driving voltage of a second polarity opposite to the first polarity. Further, an output switch SW outputs to the two data lines LD by switching between the two driving voltages Vp, Vn that have been generated by the high-side amplifier HAMP and the low-side amplifier LAMP. The power supply terminal on the low-potential side of the high-side amplifier HAMP and the power supply terminal on the high-potential side of the low-side amplifier LAMP are connected to a common charge share capacitor C08-13-2009
20110292025DISPLAY DEVICE - The present invention achieves a display device capable of quick compensation of charging of parasitic capacitance with a simple configuration and low power consumption. The display device in accordance with the present invention includes (i) pixels, (ii) signal wires (Sj), and (iii) an operational amplifier (OP12-01-2011
20110298781CIRCUIT FOR CONTROLLING DATA DRIVER AND DISPLAY DEVICE INCLUDING THE SAME - Circuits for controlling a data driver of a display device are provided. The circuit may include a bias block that may output a first or second bias current or voltage to the data driver and a control unit that may control the bias block to output the first or second bias current or voltage based on a control signal.12-08-2011
20090284517Display Apparatus - A display apparatus is provided. The display apparatus includes a display module, a plurality of driving modules, and a plurality of sensing modules. The display module has a first side and a second side opposite the first side. The driving modules are respectively adjacent to the first and second sides and are electrically connected to the display module. The sensing modules are respectively adjacent to the first and second sides, in which the sensing modules are configured to sense an environment status surrounding the display apparatus to modulate the display module from the first status to the second status. One of the driving modules adjacent to the first side is substantially opposite to one of the sensing modules adjacent to the second side, with respect to the display module.11-19-2009
20110292027BACKLIGHT CONTROL DEVICE AND METHOD FOR CONTROLLING A DRIVING CURRENT OF AN LED - A backlight control device for controlling a driving current of an LED is disclosed. By controlling current outputs from current sources of a plurality of current output units, a display will be able to generate desirable backlight. Then by adjusting currents output by the plurality of current output units, brightness of a plurality of pixels can be dynamically adjusted. The brightness of pixels with higher gray levels can be increased while the brightness of pixels with lower gray levels can be decreased, thereby improving the contrast of image and saving power consumption.12-01-2011
20110292026Display Apparatus with a Display Device and Method of Driving the Display Device - A display apparatus (12-01-2011
20110292022POWER CONVERTING APPARATUS AND POWER CONVERTING METHOD - A power converting apparatus including a power converting unit and a control unit is provided. The power converting unit receives an input voltage and generates an output voltage for a display driving unit according to a control signal. The control unit provides the control signal to the power converting unit, wherein the control unit adjusts the duty cycle or the frequency of the control signal according to an image signal. In addition, a power converting method is also provided.12-01-2011
20100265243GATE SIGNAL LINE DRIVING CIRCUIT AND DISLAY DEVICE - A gate signal line driving circuit and a display device which can suppress the degradation of an element attributed to the use of the element for a long time, and can realize the prolongation of lifetime of the element are provided. With respect to elements to which a HIGH voltage is applied for a long time, a plurality of elements are connected in parallel, and at least some of the plurality of elements are driven by switching elements.10-21-2010
20100265240PLASMA DISPLAY DEVICE - A plasma display device is provided. The plasma display device includes a plasma display panel (PDP) which has an upper substrate, a lower substrate, a plurality of scan electrodes and a plurality of sustain electrodes that are disposed on the upper substrate, and a plurality of address electrodes that are disposed on the lower substrate; and a driving unit which applies driving signals to the scan electrodes, the sustain electrodes and the address electrodes. The driving unit drives the scan electrodes in units of scan electrode groups during an address period, and applies different voltages to the scan electrodes, thereby enabling an address discharge to be stably performed.10-21-2010
20100033470DISPLAY DEVICE AND DRIVING METHOD THEREOF - A display device includes a first unit pixel disposed in a first pixel column and a first pixel row, and a second unit pixel disposed in the first pixel column and a second pixel row adjacent to the first pixel row, and first and second gate lines extending in a row direction and having gate voltage input pads at a terminal portion thereof. First and second data lines extend in a column direction and are connected to the first unit pixel and the second unit pixel, respectively. A first charge control line extends in the row direction and has a charge control gate voltage input pad disposed at a terminal portion thereof. The first gate line is connected to the first unit pixel and the second gate line is connected to the second unit pixel. The first gate line and the second gate line simultaneously receive a same gate pulse.02-11-2010
20100033471DISPLAY DRIVING CIRCUIT AND DRIVING METHOD THEREOF - A display driving circuit includes a power detector, a plurality of control units and a plurality of buffer amplifiers. The power detector outputs a control signal according to a voltage level of a supply voltage. Each control unit determines the control unit to output either auxiliary display data or original display data according to the control signal. The plurality of buffer amplifiers buffer and transfer the auxiliary display data or original display data outputted from the plurality of control units to a plurality of data lines.02-11-2010
20110216055ELECTROPHORETIC DISPLAY AND METHOD OF DRIVING THE SAME - A method of driving an electrophoretic display is set forth for avoiding image-edge residual while sequentially displaying a first frame and a second frame. During the time of displaying the first frame, set a common voltage to be a first voltage, apply a second voltage different from the first voltage to a first pixel for writing a first data signal into the first pixel, and apply the first voltage to a second pixel adjacent to the first pixel for retaining a second data signal of the second pixel, which is different from the first data signal. During the time of displaying the second frame, set the common voltage to be the second voltage, apply the first voltage to the first pixel for writing the second data signal into the first pixel, and apply the first voltage to the second pixel for retaining the second data signal of the second pixel.09-08-2011
20110141098LIQUID CRYSTAL DRIVING APPARATUS - A voltage amplifier circuit (06-16-2011
20120188221ORGANIC ELECTROLUMINESCENCE DISPLAY PANEL AND METHOD OF DRIVING THE SAME - An organic EL display panel includes a P-type drive transistor having a gate connected to a capacitor and a drain connected to an organic EL element, an N-type drive transistor having a gate connected to the capacitor and a source connected to the element, a power line for applying a voltage to the P-type drive transistor, another power line for applying a higher voltage to the N-type drive transistor. The transistors have characteristics whereby, a first gate voltage value corresponding to a predetermined current value in current-voltage characteristics of the element is a minimum voltage of the data voltage, and a second gate voltage value corresponding to the predetermined current value is greater than a third gate voltage value corresponding to a minimum current value of the element.07-26-2012
20110216056ORGANIC LIGHT EMITTING DISPLAY AND DRIVING METHOD THEREOF - An organic light emitting diode display that includes pixels having organic light emitting diodes and driving transistors for supplying a driving current to the respective organic light emitting diodes. Also included is a compensator for receiving a predetermined voltage applied to a gate electrode of the respective driving transistors, finding a threshold voltage, mobility, and a change of mobility of the driving transistors, and determining a compensation amount caused by an input image data signal while sinking a predetermined current to a path of a driving current to the organic light emitting diode through a data line connected to the pixels. Further included is a timing controller for receiving the compensation amount, correcting the input image data signal, and transmitting the corrected image data signal and a data driver for generating a data voltage based on the corrected image data signal, and supplying the data voltage to the pixels.09-08-2011
20090153538LIQUID CRYSTAL DRIVING DEVICE, AND LIQUID CRYSTAL DISPLAY DEVICE USING SAME - A liquid crystal driving device includes: a power supply unit for monitoring, using a first power supply voltage as a drive voltage, a second power supply voltage higher than the first power supply voltage to generate a monitor signal indicating whether or not the first power supply voltage is below a predetermined threshold; a logic unit for generating, using the first power supply voltage as a drive voltage, a reset request signal according to the monitor signal; a reset signal generation unit for generating, using a second power supply voltage as a drive voltage, a reset signal according to the reset request signal; and a driver unit for discharging, using the second power supply voltage as a drive voltage, liquid crystal cells according to the reset signal.06-18-2009
20090153537Power Consumption Controller, Image Processor, Self-Luminous Display Apparatus, Elelcrtonic Equipment, Power Consumption Control Method and Computer Program - The prior art power consumption control techniques convert the video signal (gray level) in one way or another based on the estimated power consumption level. The present invention proposes a power consumption controller which includes (a) a power consumption calculation section which sequentially calculates the power consumption level of a self-luminous display device based on a video signal input from the beginning of each frame up to the time of calculation, (b) a power consumption status determination section which determines whether the calculated power consumption level exceeds a reference value for comparison by constantly comparing the two levels. If this is the case, the same section detects the timing at which the power consumption exceeds the reference value for comparison and (c) a peak brightness control section which controls the peak brightness of the self-luminous display device if the power consumption level exceeds the reference value for comparison based on the detected timing.06-18-2009
20120139891Driving Method of Electrophoretic Display Device, Electrophoretic Display Device and Electronic Apparatus - An image rewriting process of rewriting an image displayed by applying any one of a first electric potential or a second electric potential to each of a plurality of pixel electrodes and by moving electrophoretic particles by an electric field generated between the pixel electrodes and a common electrode includes a temperature determining process, and includes a first pulse application process which uses the driving pulse signal with the pulse width being a first width, a low temperature pulse application process, and a second pulse application process which uses the driving pulse signal with the pulse width being a second width, performed at the end. The low temperature pulse application process uses the driving pulse signal with the pulse width being the first width.06-07-2012
20090153539Power supply circuit for liquid crystal display - An exemplary power supply circuit includes an output terminal configured for providing electric power to a load circuit, a direct current (DC) power supply, a first resistor, a second resistor, a first switch and a second switch. The first switch includes a control electrode is grounded via the first resistor, a first current conducting electrode is connected to the DC power supply, and a second current conducting electrode is connected to the output terminal. The second switch includes a control electrode is connected to the output terminal, a first current conducting electrode is connected to the DC power supply, and a second current conducting electrode is connected to the control electrode of the first switch. The second resistor is interconnected the first current conducting electrode of the first switch and the second current conducting electrode of the first switch.06-18-2009
20090146987PIXEL AND ORGANIC LIGHT EMITTING DISPLAY - A pixel at an ith pixel row (i is a natural number) includes an organic light emitting diode (OLED); a driving transistor for supplying a current to the OLED and a storage capacitor between a gate electrode of the driving transistor and an (i−1)th emission control line; and a compensating unit for controlling a voltage of the gate electrode of the driving transistor to compensate for deterioration of the OLED. The compensating unit includes: a first compensating unit transistor and a second compensating unit transistor between the OLED and a first power source; first and second feedback capacitors between a second node between the first and second compensating unit transistors and a first node between the gate electrode of the driving transistor and the storage capacitor; and a third compensating unit transistor coupled between a third node between the first and second feedback capacitors and a reference voltage source.06-11-2009
20110169812Pixel circuit, display device, driving method of pixel circuit, and driving method of display device - A pixel circuit, disposed at a part where a scanning line and a signal line intersect each other, includes at least an electrooptic element, a drive transistor, a sampling transistor, and a retaining capacitance. The drive transistor has a gate connected to an input node, a source connected to an output node, and a drain connected to a predetermined power supply potential and supplies a driving current to the electrooptic element according to a signal potential retained in the retaining capacitance. The electrooptic element has one terminal connected to the output node and another terminal connected to a predetermined potential. The sampling transistor is connected between the input node and the signal line and operates when selected by the scanning line, samples an input signal from the signal line, and retains the input signal in the retaining capacitance. The retaining capacitance is connected to the input node. The pixel circuit further includes a compensating circuit which detects a decrease in the driving current from a side of the output node and feeds back a result of detection to a side of the input node to compensate for a decrease in the driving current, which decrease is attendant on a secular change of the drive transistor.07-14-2011
20080316195GATE DRIVING CIRCUIT AND POWER CONTROL CIRCUIT - A gate driving circuit and a power control circuit are disclosed. The gate driving circuit includes a gate driver and the power control circuit. The gate driver is adapted for receiving a starting signal and sequentially outputting a plurality of scan signals accordingly. The power control circuit includes a delay circuit, a level shifter and a switch unit. The delay circuit is adapted for receiving and delaying the starting signal for a predetermined period and then outputting the delayed starting signal. The level shifter receives and adjusts a voltage level of the delayed starting signal, and outputs a starting voltage accordingly. The switch unit provides the first power to the gate driver after being delayed for the predetermined period according to the starting voltage.12-25-2008
20100007647ELECTRO-OPTICAL DEVICE AND ELECTRONIC APPARATUS - An electro-optical device includes a plurality of pixel circuits, each of which is disposed at a position corresponding to each intersection position between a plurality of scanning lines and signal lines; a power feeding line which supplies a predetermined potential to the plurality of pixel circuits; and an initialization line which supplies an initialization potential to the plurality of pixel circuits, wherein each of the plurality of pixel circuits includes an electro-optical element, a storage capacitor, an initializer and a driving transistor.01-14-2010
20100118021DISPLAY DEVICE AND PORTABLE TERMINAL - In order to increase the continuous operating time of a display device driven by a battery or the like, and a portable information terminal using the same, the volume and weight of the battery are increased. Thus, there arises a trade-off between the increased capacity of the battery and the portability of the device/terminal. Therefore, the invention provides a display device with portability ensured, which is capable of operating continuously for long periods and a portable information terminal using the same. In the display device, TFTs and an RFID tag are formed over the same insulating substrate. The RFID tag detects signals from a reader/writer, and generates DC power based on the signals. While the RFID tag is detecting signals, the display device is driven by the DC power generated in the RFD) tag.05-13-2010
20100265241Display apparatus using power supply circuit - A power supply circuit for a display apparatus, includes: a voltage boosting circuit configured to boost up an input voltage based on a voltage boosting factor to output a boosted output voltage; a voltage detecting circuit configured to compare a voltage level of a power supply voltage to which the input voltage is related and a predetermined voltage level; and a control circuit configured to output one of a first voltage boosting factor and a second voltage boosting factor as the voltage boosting factor to the voltage boosting circuit based on the comparison result. The control circuit changes the voltage boosting factor during a blanking period in a display panel.10-21-2010
20100118019Dynamically Managing Power Consumption Of A Computer With Graphics Adapter Configurations - Dynamically managing power consumption of a computer, the computer including two or more graphics adapters, the computer having a number of graphics adapter configurations including one or more of the graphics adapters, where managing power consumption includes: monitoring, by a graphics driver, operation of a current graphics adapter configuration, the operation characterized by a graphics processing load; determining, in dependence upon the graphics processing load, whether operation of the current graphics adapter configuration conforms to predefined graphics processing criteria; if operation conforms, processing graphics, by the graphics adapter, for display with the one or more graphics adapters of the current graphics adapter configuration; and if operation does not conform, processing graphics, by the graphics adapter, for display with the one or more graphics adapters of another graphics adapter configuration.05-13-2010
20110134100PIXEL CIRCUIT AND ORGANIC ELECTRO-LUMINESCENT DISPLAY APPARATUS - An organic electro-luminescent display apparatus can compensate for the threshold voltage and voltage drop of the driving transistor. The organic electro-luminescent display apparatus divides and drives an initialization time, thereby improving a contrast ratio. The organic electro-luminescent display apparatus minimizes or reduces the change of a current due to a leakage current by correcting the leakage current corresponding to a data voltage with a fixed power source, thereby improving crosstalk. The organic electro-luminescent display apparatus adjusts the duty of the emission control signal, thereby removing or reducing motion blur.06-09-2011
20110148846LIQUID CRYSTAL DISPLAY DEVICE AND DRIVING METHOD THEREOF - Disclosed is a liquid crystal display device and a driving method thereof for displaying an image, in which the polarity of a voltage applied to the liquid crystal element is inverted in a first frame period and a second frame period which are sequential. The voltage applied to the liquid crystal element is compensated in the case where images of the first frame period and the second frame period are judged as a still image as a result of comparison of the image of the first frame period with the image of the second frame period and the absolute value of the voltage applied to the liquid crystal element in the first frame period is different from that of the voltage applied to the liquid crystal element in the second frame period.06-23-2011
20120032944OPERATIONAL AMPLIFIER CIRCUIT, SIGNAL DRIVER, DISPLAY DEVICE, AND OFFSET VOLTAGE ADJUSTING METHOD - Provided is an operational amplifier circuit including a Rail-to-Rail differential amplifier including: first and second differential transistors forming a first differential pair; and third and fourth differential transistors forming a second differential pair, wherein each of the first and second differential transistors is an n-type MOS transistor, each of the third and fourth differential transistors is a p-type MOS transistor, and the operational amplifier circuit further includes: a first correction current supply unit configured to supply the first differential pair with a first correction current to adjust an input offset voltage of the operational amplifier circuit; and a second correction current supply unit configured to supply the second differential pair with a second correction current to adjust the input offset voltage of the operational amplifier circuit.02-09-2012
20120032942LIQUID CRYSTAL DISPLAY DEVICE AND DRIVING METHOD OF THE SAME - Provided is a liquid crystal display device having a pixel including a transistor and a liquid crystal element and a protection circuit electrically connected to one of a source and a drain of the transistor through a data line. The protection circuit includes a first terminal supplied with a first power supply potential and a second terminal supplied with a second power supply potential higher than the first power supply potential. In a moving image display mode, an image signal is input from the data line to the liquid crystal element through the transistor, and the first power supply potential is set at the first potential. In a still image display mode, supply of the image signal is stopped, and the first power supply potential is set at the second potential. The second potential is substantially the same as the minimum value of the image signal.02-09-2012
20120032941Liquid crystal display device with low power consumption and method for driving the same - A liquid crystal display device includes a timing controller and a charge-sharing circuit. The timing controller is configured to provide a plurality of input clock signals having duty cycle smaller than ⅓. The charge-sharing circuit is configured to allow charge-sharing to occur between a specific input clock signal and two other input clock signals respectively during the signal rising period and signal falling period of the specific input clock signal, thereby providing a plurality of output clock signals for driving a shift register.02-09-2012
20090207160DISPLAY DRIVE APPARATUS, DISPLAY APPARATUS AND DRIVE CONTROL METHOD THEREOF - A display drive apparatus for driving a display pixel including a light-emitting element and a drive element in which one end of a current path is connected to the light-emitting element. The display drive apparatus has a specific value detection section detecting a difference value between a measured voltage detected at one end of a data line when a reference current is applied via the data line and a standard voltage corresponding to the reference current so as to obtain a specific value corresponding to variation of an element characteristic of the drive element, and a gradation signal correction section generating a corrected gradation signal by correcting a gradation signal according to display data based on the specific value so as to apply the corrected gradation signal from the one end of the data line to the display pixel.08-20-2009
20100079439METHOD AND APPARATUS TO SUPPORT VARIOUS SPEEDS OF LCD DRIVER - Charge pump circuitry comprises a voltage for generating a first regulated voltage. A low drop out regulator generates a second regulated voltage responsive to the first regulated voltage. A charge pump voltage generation circuit generates a voltage. First and second resistor strings are responsive to the generated voltage. The first resistor string provides a first plurality of bias voltages to an LCD responsive to the voltage in a first mode of operation and the second resistor string provides faster charging and discharging of the connected LCD elements responsive to a second mode of operation.04-01-2010
20110169815SPATIAL LIGHT MODULATOR - A spatial light modulator includes an array of pixels, with each of the pixels having a dimension smaller than a wavelength of light to be modulated. Each of the pixels further has a permittivity that can he controlled using an electronic signal applied to the pixel.07-14-2011
20090184952PLASMA DISPLAY DEVICE AND DRIVING METHOD OF PLASMA DISPLAY PANEL - A plasma display device has a plasma display panel, an accumulative adding circuit for accumulatively adding predetermined values every predetermined unit time while current is applied to the plasma display panel, and a judging circuit for judging the property of an image to be displayed on the plasma display panel. The accumulative adding circuit varies the predetermined values in response to the judgment result of the judging circuit.07-23-2009
20090141015Image display device - A shift in the frame of a moving image in an image display device using self-luminous elements is made hard to see.06-04-2009
20110169813DISPLAY PANEL DRIVING CIRCUIT HAVING CHARGE SHARING SWITCH FORMED IN PAD - A display panel driving circuit includes N number of amplifiers configured to supply N number of output voltages to a display panel; N number of output switches configured to transmit output signals from the N number of amplifiers through N number of pads to the display panel; and a plurality of charge sharing switches configured to share charges among the N number of pads, wherein the charge sharing switches are formed in the pads.07-14-2011
20110169811PLASMA DISPLAY APPARATUS AND METHOD OF DRIVING PLASMA DISPLAY PANEL - A sustain pulse generating circuit has a power recovery circuit and an auxiliary circuit. The power recovery circuit has an inductor with a first coil, a second coil, and a third coil, and a capacitor. The auxiliary circuit has a first auxiliary switch and a second auxiliary switch. The sustain pulse generating circuit energizes the first auxiliary switch and stores energy in a forward direction to the first coil immediately before the sustain pulse rise. Immediately before the sustain pulse falls, the sustain pulse generating circuit energizes the second auxiliary switch and stores energy in a reverse direction to the second coil. When the sustain pulse rises and falls, the current flowing between the power recovery circuit and the capacitive load is the current produced by LC resonance plus the current produced by the energy previously stored in the recovery inductor.07-14-2011
20090201282METHODS OF TUNING INTERFEROMETRIC MODULATOR DISPLAYS - A method of tuning interferometric modulator display driving is disclosed. In one embodiment, the method comprising applying at least one voltage to an interferometric modulator display element, and while applying the voltage, adjusting a release and an actuation response time for the interferometric modulator. In another embodiment, the release and actuation response time are adjusted by adjusting the bias voltage applied to the device. Determining how to adjust the bias voltage may be done by measuring the current response of the device.08-13-2009
20090167749DISPLAY DRIVER METHOD AND APPARATUS - A method of providing an LCD overdrive drive scheme, which comprises measuring a stabilized transmission level of an LCD display pixel corresponding to a target drive level. An overdrive transmission level is measured corresponding to an overdrive drive level. The measured overdrive transmission level is compared with the measured stabilized transmission level to determine if the overdrive drive level is too high or too low. An iterative process then changes the overdrive drive level until a suitable overdrive drive level is found. This is used to derive overdrive drive scheme parameters which are stored in a memory of the LCD device. This method enables an overdrive scheme to be determined during use of the device. It can therefore take account of temperature and display ageing, without the effects of these being modeled.07-02-2009
20090085906Power circuit and liquid crystal display using same - An exemplary power circuit includes a first rectifying and filtering circuit, a power factor correction (PFC) circuit, an inverter circuit and a second rectifying and filtering circuit. The first rectifying and filtering circuit receives an AC voltage and transforms the AC voltage to a first DC voltage. The power factor correction circuit includes a first transformer, a first diode and a first storage capacitor. The inverter circuit includes a transistor and a second transformer. A primary winding of the second transformer is grounded via the transistor and receives the first DC voltage via a primary winding of the first transformer, the first diode and a secondary winding of the first transformer in series when the transistor is switched on. The second rectifying and filtering circuit connected to a secondary winding of the second transformer for providing a second DC voltage to a load circuit.04-02-2009
20090128538PLASMA DISPLAY DEVICE - A plasma display device that can utilize an energy recovery voltage regardless of whether pixels are selected. An energy recovery circuit of the plasma display device includes first and second switches serially coupled between a first voltage source and a second voltage source, a third switch coupled to a connection point between the first and second switches, a voltage recovery capacitor coupled between the third switch and a base voltage source, and a precharger for charging the voltage recovery capacitor.05-21-2009
20090289932POWER SUPPLY CIRCUIT AND LIQUID CRYSTAL DISPLAY APPARATUS - In one embodiment of the present invention, a reset signal changes into a High level in sync with rising and falling edges of a common electric potential. This causes a comparator to be reset in sync with the rising and falling edges of the common electric potential, so that a comparator output signal is maintained in a ground level. Therefore, even if a voltage held by a capacitor is suddenly changed by the inversion of the common electric potential, a wrong comparator output signal cannot be outputted. In a charge pump type power supply circuit having, for the purpose of regulating an output voltage, the comparator that fulfills an offset cancel function by using the capacitor, it is possible to obtain a stable output with little fluctuation without being affected by a change in the common electric potential of a common electrode of pixels in a liquid crystal display apparatus.11-26-2009
20090262104IMAGE DISPLAY APPARATUS AND VOLTAGE CONTROL METHOD - An image display apparatus includes a light source, a scanner that scans an output beam emitted from the light source to forms an image on a projection surface, a light source driver that control intensity of the output beam emitted from the light source by controlling a drive current for driving the light source based on input image data, a light source drive power supply that supplies power to the light source driver, and a voltage controller that controls an output voltage from the light source drive power supply based on the input image data.10-22-2009
20090262103Method for adjusting common voltage of liquid crystal display device - A method for adjusting a common voltage of an LCD device includes providing an LCD device and a photodetector, obtaining variable parameters Ya, Yb and Yc, the variable parameters Ya, Yb and Yc respectively denoting flicker intensity of the LCD device when the common voltages are parameters Va, Vb and Vc, Vb exceed Va, and is less than Vc, when Yb exceeds Yc and is less than Ya, increasing the parameters Va, Vb and Vc respectively and repeating the two steps, when Yb exceeds Ya and is less than Yc, decreasing the parameters Va, Vb and Vc respectively and repeating the two steps, and when Yb is less than or equals Ya and is less than or equals Yc, setting an arbitrary value between Va and Vc as an optimum common voltage of the LCD device.10-22-2009
20090262102Display device, driving method of display device, and electronic device - Disclosed herein is a display device including a pixel array unit, a first scanning circuit, a second scanning circuit and a selecting circuit.10-22-2009
20090295777Source driver for display panel and drive control method - A source driver and drive control method therefor that makes it possible to cancel offset voltages and to obtain good display quality even when a vertical synchronization signal is not fed to the source driver. A source driver is provided for receiving from a timing controller a horizontal synchronization signal of an image signal, and a binary control signal of which a value varies in two values in synchronization with the horizontal synchronization signal and in which start values of adjacent frames of the image signal are different, excluding a vertical synchronization signal of the image signal, to apply a drive voltage to a plurality of source signal lines of a display panel. In the source driver, the vertical cycle of the image signal is analyzed on the basis of the binary control signal; a pseudo vertical synchronization signal is generated on the basis of the vertical cycle; and a cancel operation of an offset voltage component of the drive voltage is perform on the basis of the pseudo vertical synchronization signal.12-03-2009
20090295776Light emitting diode driving circuit and controller thereof - A light emitting diode driving circuit comprising: a current control unit, a current detection unit, and a driving control unit. The current control unit connects to the current detection unit and comprises a control end, a first input/output end, and a second input/output end to individually produce an electric potential detection signal. The light emitting diode driving circuit determines whether driving the light emitting diode is unusual or not according to the electric potential detection signals to decide to start a protect mechanism. Furthermore, the present invention can receive any types of dimming signals to adjust the light of the light emitting diode.12-03-2009
20090102827DRIVING METHOD FOR DISPLAY APPARATUS - A display apparatus is capable of performing a gradation display and a high-speed low-power-consumption display by controlling the colored state of each pixel to an appropriate state. A driving method for the display apparatus displays images through deposition and dissolution of a metal by impressing a predetermined voltage on each pixel. A voltage pulse or AC voltage having an amplitude of not more than a threshold for deposition of the metal is impressed, and a writing pulse or an erasing pulse is controlled according to the resultant current. Alternatively, an additional writing pulse is impressed when the current is lowered to or below a predetermined value, after the writing. Further, the state of the pixel is detected through the current, and a rewriting operation is selected according to the detected state.04-23-2009
20110169814DIGITAL DRIVING CIRCUITS, METHODS AND SYSTEMS FOR LIQUID CRYSTAL DISPLAY DEVICES - A method may include controlling a display device in at least first mode by varying a correlation between display driver signals applied across display segments within the display device; wherein the display driver signals vary between substantially only two levels, and a display segment is activated when an average voltage magnitude across the segment over a time period exceeds a threshold value.07-14-2011
20120086694PIXEL CIRCUIT AND DISPLAY PANEL WITH IR-DROP COMPENSATION FUNCTION - A pixel circuit and a display panel with an IR-drop compensation function are disclosed. The display panel includes multiple pixel circuits and multiple compensation circuits. Each of the pixel circuits includes a detecting switch. After a real work voltage of a pixel circuit is transmitted to a corresponding compensation circuit through a corresponding detecting switch, a data transmitted to the pixel circuit is adjusted by the compensation circuit according to a relationship between the real work voltage and an original work voltage.04-12-2012
20130100110STEREO-SCOPIC IMAGE PANEL, STEREO-SCOPIC IMAGE DISPLAY APPARATUS HAVING THE SAME AND DRIVING METHOD THEREOF - The present invention provides a stereoscopic image panel making it possible to freely watch a stereoscopic image by being equipped with parallax barriers, a stereoscopic image display apparatus including the stereoscopic image panel, and a method of driving the stereoscopic image panel. A stereoscopic image panel according to the present invention includes: a liquid crystal layer; a first electrode unit positioned opposite to one side of the liquid crystal layer; a second electrode unit including first, second, and third electrodes positioned such that one side of each of the electrodes is opposite the other side of the liquid crystal layer; and a third electrode unit positioned opposite the other side of the second electrode.04-25-2013
20110199366OUTPUT CIRCUIT, DATA DRIVER AND DISPLAY DEVICE - Disclosed is an output circuit including a differential amplifier stage, an output amplifier stage, an amplification acceleration circuit and a capacitance connection control circuit. The output amplifier stage includes push/pull type transistors connected an output terminal. The amplification acceleration circuit includes a first switch and a first transistor, connected between a first output of the differential amplifier stage and the output terminal, and a second transistor and a second switch connected between the output terminal and a second output of the differential amplifier stage. The capacitance connection control circuit includes first capacitive element having first end connected to the output terminal, a first switch connected between a second end of the first capacitive element and a first voltage supply terminal, and a second switch connected between the second end of the first capacitive element and one output of a first differential pair of the differential amplifier stage.08-18-2011
20110199367DISPLAY APPARATUS - Provided is a display apparatus having: a voltage application control section to apply a voltage onto electrochemical display elements of an ED type for each frame period; a frame control section 08-18-2011
20110199365PULSE SIGNAL OUTPUT CIRCUIT AND SHIFT REGISTER - A transistor whose channel region includes an oxide semiconductor is used as a pull down transistor. The band gap of the oxide semiconductor is 2.0 eV or more, preferably 2.5 eV or more, more preferably 3.0 eV or more. Thus, hot carrier degradation in the transistor can be suppressed. Accordingly, the circuit size of the semiconductor device including the pull down transistor can be made small. Further, a gate of a pull up transistor is made to be in a floating state by switching of on/off of the transistor whose channel region includes an oxide semiconductor. Note that when the oxide semiconductor is highly purified, the off-state current of the transistor can be 1 aA/μm (1×1008-18-2011
20110199363GATE DRIVE CIRCUIT AND DISPLAY APPARATUS HAVING THE SAME - An n-th stage (wherein, n is an integer) of the stages of a gate driving circuit includes a pull-up part, a first variable mode part and a second variable mode part. At least one of the first and second variable mode parts includes a variable element. The variable element comprises a first thin-film transistor (TFT) turned on in response to a first level voltage of the first or second direction signal, a second TFT applying the first or second direction signal to a control part of the pull-up part in response to an output signal of a previous stage or an output signal of a next stage, and a third TFT connected to the second TFT through the first TFT.08-18-2011
20110199364DISPLAY DEVICE AND DRIVING METHOD - An object is to reduce power consumption of a display device and to suppress deterioration of display quality. As a transistor provided for each pixel, a transistor including an oxide semiconductor layer is used. Note that off-state current of the transistor can be decreased when the oxide semiconductor layer is highly purified. Therefore, variation in the value of a data signal due to the off-state current of the transistor can be suppressed. That is, display deterioration (change) which occurs when writing frequency of the data signal to the pixel including the transistor is reduced (when a break period is lengthened) can be suppressed. In addition, flickers in display which generates when the frequency of an alternating-current driving signal supplied to a signal line in the break period is reduced can be suppressed.08-18-2011
20110199362METHOD FOR DRIVING LIQUID CRYSTAL DISPLAY DEVICE AND LIQUID CRYSTAL DISPLAY DEVICE - In a method of driving a liquid crystal display device in accordance with the present invention, a transition voltage (+25 VDC) for causing liquid crystal molecules to be in a bend orientation state is applied, and after an entire surface is changed into the bend orientation state, the voltage applied to a liquid crystal layer is continuously reduced from a transition voltage to a reverse tilt eliminating voltage.08-18-2011
20100103159ELECTROLUMINESCENT DISPLAY WITH EFFICIENCY COMPENSATION - An electroluminescent (EL) subpixel having a readout transistor is driven by a current source when the drive transistor is non-conducting. This produces an emitter-voltage signal from which an aging signal representing the efficiency of the EL emitter can be computed. The aging signal is used to adjust an input signal to produce a compensated drive signal to compensate for changes in efficiency of the EL emitter.04-29-2010
20110205220LIGHT EMITTING DEVICE, METHOD OF DRIVING LIGHT EMITTING DEVICE, AND ELECTRONIC APPARATUS - A light emitting device includes a pixel circuit and a driving circuit, the pixel circuit including a driving transistor, a light emitting element, a first capacitance element interposed between a gate and a source of the driving transistor, a selection transistor, a current generating unit which generates set current. The driving circuit controls the current generating unit to generate set current with a predetermined magnitude in a current set period before a writing period of writing data potential in the pixel circuit, to set the voltage (voltage between both ends of the first capacitance element) between the gate and the source of the driving transistor to a value necessary to allow the set current to flow in the driving transistor.08-25-2011
20110205219Automatically Repainting an External Display - A computer system may include a main display and an external display coupled, for example, to the computer system through a universal serial bus digital visual interface link. In response to the detection of an indication of a suspension of the system to a reduced power consumption state, such as the S3 sleeping state, the external display may be automatically repainted. In addition, the current image layers and coordinates may be automatically stored to a frame buffer.08-25-2011
20110267334METHOD FOR DRIVING ELECTROCHEMICAL DISPLAY ELEMENT - In the case of depositing a metal in a plurality of stages by applying deposition voltages having a plurality of rectangular waves at different voltages to an electrochemical display element, the application time of the rectangular wave at the highest voltage among the plurality of rectangular waves is set to a time (Tip) required for reaching a resistance inflexion point (Rip) where the resistance value (R) of a pixel starts to rapidly increase or shorter. Thus, the element can be prevented from being broken without deteriorating the response characteristics of a display element.11-03-2011
20090002358SOURCE DRIVER, ELECTRO-OPTICAL DEVICE, PROJECTION-TYPE DISPLAY DEVICE, AND ELECTRONIC INSTRUMENT - A source driver that drives a source line of an electro-optical device includes an image data comparison circuit that compares K-bit (K is an integer equal to or larger than two) image data in a current drive period with preceding data corresponding to a preceding drive level, and an amplifier circuit that drives the source line based on the image data with a first current drive capability, and then drives the source line based on the image data with a second current drive capability that is lower than the first current drive capability within a given drive period. When the image data comparison circuit has detected that higher-order L bits (L01-01-2009
20100134472FLAT PANEL DISPLAY DEVICE - A flat panel display device includes an image processing circuit, a power supply, and a gamma voltage generator. The image processing circuit receives grayscale data, identifies a range in which a gray level of the grayscale data is located, and generates a reference signal based on the range. The power supply supplies a drive voltage based on the reference signal. The gamma voltage generator generates a set of gamma voltages based on the drive voltage.06-03-2010
20100128019LIQUID CRYSTAL DISPLAY DEVICE - A liquid crystal display device includes a plurality of pixels arranged on a substrate in a matrix, a source driver circuit to supply source signals to source lines connected to each pixel arranged in a column direction and a gate driver circuit to supply gate signals to respective gate lines connected to pixels arranged in a row direction. A control circuit outputs an array control signal for a partial display to a receiver circuit that receives a partial display start address to specify a gate line for starting a partial display and a partial display end address to specify a gate line for ending the partial display. A decoder circuit outputs a control signal to control a range of the gate lines driven by the gate driver circuit.05-27-2010
20090167748PLASMA DISPLAY APPARATUS, DRIVING METHOD THEREOF AND DRIVING IC - A plasma display apparatus wherein during the period for which the lighting of the AC type PDP panel is sustained, the electrodes on one side of the panel are maintained at a constant potential whereas the electrodes on the other side of the panel are supplied alternately with a positive voltage and a negative voltage, the plasma display apparatus having a means that feeds power flowing toward the address power source into a separate power source.07-02-2009
20090027375Power source, display including the same, and associated method - A power source for applying a voltage to a pixel circuit, the power source including a sensing unit and a controlling unit. The sensing unit senses a current flowing through a power line coupled to the pixel circuit, the controlling unit increases a voltage applied to the power line by a first amount when the sensed current is lower than a reference, and the controlling unit decreases the voltage applied to the power line by a second amount when the sensed current is higher than the reference, the second amount being different from the first amount.01-29-2009
20080278472Display Unit - Display units (11-13-2008
20120293480ELECTROPHORETIC DISPLAY AND RELATED DRIVING METHOD - An electrophoretic display and a related driving method are provided, the electrophoretic display and related driving method for causing voltage level switching of a common signal of the electrophoretic display, which induces colored electrophoretic particles to be arranged in a more compact way during a power-off period, thereby improving the quality of a standby image of the electrophoretic display.11-22-2012
20120293479Pixel, Display Device Including The Pixel, And Driving Method Of The Display Device - A display device that includes a pixel including an organic light emitting diode (OLED), a driving transistor connected to the driving voltage and supplying a driving current to the OLED, a compensation capacitor connected to the gate electrode of the driving transistor, and a first storage capacitor and a second storage capacitor electrically connected to or blocked from the compensation capacitor, and a driving method thereof.11-22-2012
20120293482PIXEL UNIT CIRCUIT AND OLED DISPLAY APPARATUS - The present disclosure discloses a pixel unit circuit and an OLED display apparatus. The pixel unit circuit comprises a first sub-circuit module, a second sub-circuit module, a first capacitor and OLED. An input of the first sub-circuit module is connected to a data line; another input of the first sub-circuit module is connected to an output of the second sub-circuit module and a first terminal of the OLED; an output of the first sub-circuit module is connected to an input/output of the second sub-circuit module via the first capacitor; a voltage difference between positive power supply and negative power supply of a backboard is applied between an input of the second sub-circuit module and a second terminal of the OLED. The pixel unit circuit can compensate the aging of OLED devices, the non-uniformity of threshold voltage of TFT driving transistors, and IR Drop of the power supply of the backboard.11-22-2012
20120293483OUTPUT CIRCUIT, AND DATA DRIVER AND DISPLAY DEVICE USING THE SAME - An output circuit includes a connection switch and an operation unit. The connection switch includes first to third terminals for receiving first to third voltages, respectively, selects and outputs the first voltage or the second voltage or the third voltage to each of the first to seventh intermediate terminals, including selection of the same voltage for a plurality of the intermediate terminals. The connection switch switches assignment of the first to third voltages to the first to seventh intermediate terminals responsive to a connection switching signal. The operation unit receives the voltages assigned to the first to seventh intermediate terminals and outputs to an output terminal a voltage obtained by performing a predetermined operation on the voltages supplied to the first to seventh intermediate terminals.11-22-2012
20120139890Organic light emitting display device - A display device includes a plurality of pixels connected with scan lines, emission control lines, and data lines; a plurality of switches connected between respective data lines and a data driver; a first power driver supplying an initial voltage for an initialization period, a reference voltage higher than the initial voltage for a compensation period, and a first high voltage higher than the reference voltage for a emission period, the first high voltage used as a first power supply; a second power driver supplying a second high voltage as a second power supply for the initialization period, the compensation period, and the charge period, and supplying a low voltage lower than the second high voltage for the emission period; a scan driver driving the scan lines and the emission control lines; and the data driver supplying data signals to the data lines for the charge period.06-07-2012
20120293484DISPLAY ELEMENT AND ELECTRIC DEVICE EQUIPPED WITH SAME - A display element (11-22-2012
20120293481SYSTEMS AND METHODS FOR DISPLAY SYSTEMS WITH DYNAMIC POWER CONTROL - Methods and systems to dynamically adjust a voltage supply of a display are provided. Systems are provided to receive a digital data input indicative of an amount of luminance to be emitted from the display, to determine a desired supply voltage to supply to the display based on the received digital data, and to adjust an adjustable voltage supply according to the determined desired supply voltage. Furthermore, the methods and systems disclosed herein provide for dynamically separately controlling supply voltages supplied to distinct subsections of the display. Systems and methods are also provided for operating a display device in an idle mode by turning off subsections of the display that would otherwise be shown dark and thereby save energy required to program the subsections with display information.11-22-2012
20120293478SYSTEM AND METHODS FOR EXTRACTION OF THRESHOLD AND MOBILITY PARAMETERS IN AMOLED DISPLAYS - Disclosed is a system and method to improve the extraction of transistor and OLED parameters in an AMOLED display for compensation of programming voltages to improve image quality. A pixel circuit includes an organic light emitting device, a drive device to provide a programmable drive current to the light emitting device, a programming input to provide the programming signal, and a storage device to store the programming signal. A charge-pump amplifier has a current input and a voltage output. The charge-pump amplifier includes an operational amplifier in negative feedback configuration. The feedback is provided by a capacitor connected between the output and the inverting input of the operational amplifier. A common-mode voltage source drives the non-inverting input of the operational amplifier. An electronic switch is coupled across the capacitor to reset the capacitor. A switch module including the input is coupled to the output of the pixel circuit and an output is coupled to the input of the charge-pump amplifier. The switch module includes a set of electronic switches that may be controlled by external control signals to steer current in and out of the pixel circuit and provide a discharge path between the pixel circuit and the charge-pump amplifier and isolating the charge-pump amplifier from the pixel circuit. A controller is coupled to the pixel circuit, charge-pump amplifier and the switch module. The controller controls input signals to the pixel circuit, charge-pump amplifier and switch module in a predetermined sequence to produce an output voltage value which is a function of a parameter of the pixel circuit. The sequence includes providing a program voltage to the programming input to either pre-charge an internal capacitance of the pixel circuit to a charge level and transfer the charge to the charge-pump amplifier via the switch module to generate the output voltage value or provide a current from the pixel circuit to the charge-pump amplifier via the switch module to produce the output voltage value by integration over a certain period of time.11-22-2012
20080246751POWER FACTOR CORRECTOR - A power factor correction circuit (PFC) including a switch, a feedback signal generator for generating a feedback voltage corresponding to an output voltage, and a switching controller for receiving the feedback voltage and for controlling turn-on/turn-off of the switch. The feedback signal generator includes first and second resistors serially connected to first and second ends of an PFC output terminal; a first capacitor connected between a first node of the first and second resistors and the first end of the PFC output terminal; and a comparator for comparing a voltage of the first node and a reference voltage, and for generating a feedback voltage.10-09-2008
20080291193DISPLAY DEVICE - Detection voltages of self light emitting elements in a self-luminous display panel are detected by a detection circuit through a selection switch in a data line drive circuit via pixel detection switches and interactive signal lines. The detection operation is performed by making use of a power source supply time and a retracing period.11-27-2008
20080284774Display, method for driving display, electronic apparatus - A display includes: a pixel array section configured to include power feed lines, scan lines disposed along rows, signal lines disposed along columns, and pixels that are disposed at intersections of the scan lines and the signal lines and are arranged in a matrix, each of the pixels including a drive transistor and a light-emitting device, one of a pair of current terminals as source and drain of the drive transistor being connected to the power feed line, and a power supply scanner configured to sequentially switch potential of each power feed line between higher potential and lower potential, wherein the power supply scanner switches the higher potential applied to the power feed line between first higher potential and second higher potential at different levels in a predetermined sequence.11-20-2008
20100141633Embedded Display Power Management - An integrated circuit is disclosed that includes a display management circuitry configured to control the operation of a display panel in combination with a power management circuitry configured to control the power consumption of a panel backlight.06-10-2010
20100141634DRIVING METHOD FOR DISCHARGE LAMP, DRIVING DEVICE FOR DISCHARGE LAMP, LIGHT SOURCE DEVICE, AND IMAGE DISPLAY APPARATUS - In at least one embodiment of the disclosure, a driving device for a discharge lamp includes an alternating current supply section and a frequency modulation section. The alternating current supply section supplies two electrodes of the discharge lamp with an alternating current. The alternating current comprises a plurality of modulation periods. The frequency modulation section modulates a frequency of the alternating current so as to provide a plurality of retentive periods within each of the modulation periods. Each retentive period has a constant frequency that is different from a frequency of its temporally adjacent retentive periods. The frequency modulation section shortens a length of at least one of the retentive periods in the modulation period in response to a predetermined condition occurring. The frequency of at least one of the retentive periods is equal to or less than a predetermined reference frequency.06-10-2010
20110205217METHOD OF DRIVING DISPLAY PANEL - Provided is a method of driving a display panel having a charge trap device and an organic light emitting diode (OLED). The charge trap device includes a nanocrystal layer. The nanocrystal layer includes nanocrystals, which are crystallized and dispersed, and a barrier layer, which buries the nanocrystals. When a program voltage is applied, charges are trapped in the nanocrystals, and the OLED emits light at a predetermined luminance with the application of a read voltage. Data signals are sequentially applied to all pixels of the display panel to express desired grayscales. The pixels of the display panel receive the read voltage and emit light at the same time.08-25-2011
20130120345PLASMA DISPLAY AND DRIVING METHOD THEREOF - In a plasma display, a first transistor is coupled between a low voltage terminal of a scan circuit and a power source configured to supply a scan voltage, and a second transistor is coupled between the low voltage terminal and the first transistor. A third transistor is coupled to the low voltage terminal, and a capacitor is coupled between the third transistor and a node between the first and second transistors. In addition, a fourth transistor is coupled between the low voltage terminal and a ground terminal. By utilizing the capacitor, power consumption of a transistor can be reduced, and accordingly, heat dissipation of the transistor also can be reduced.05-16-2013
20130120346SCAN DRIVING DEVICE AND DRIVING METHOD THEREOF - A scan driving device including scan driving blocks including a first node receiving a second-voltage according to a signal input to a first-input terminal, a second node receiving a first-voltage according to a signal input to the first-input terminal, and receiving an input signal according to a clock signal input to a second-input terminal, a first transistor connected to the first node, the first power source, and an output terminal, and a second transistor connected to the second node and the output terminal and configured to receive a clock signal input to a third-input terminal, wherein, during the initial driving period, the input signal is applied with a gate-off-voltage, and clock signals input to the first-, second-, and third-input terminals are applied with a gate-on-voltage to reset a voltage at the first node with the gate-on-voltage and reset a voltage at the second node with the gate-off-voltage.05-16-2013
20130120348DRIVING METHOD FOR ORGANIC ELECTROLUMINESCENCE LIGHT EMITTING SECTION - A driving method for an organic EL light emitting section is provided which achieves optimization of a mobility correction process for a transistor of a driving circuit in response to luminance. The light emitting section may include a driving circuit with a driving transistor, an image signal writing transistor and a capacitor section having a pair of electrodes (corresponding to a first node ND05-16-2013
20130120349DISPLAY DEVICE AND METHOD FOR DRIVING THE SAME - A display device and a method for driving the same are disclosed. The disclosed display device includes a display panel for displaying an image corresponding to a plurality of data signals transferred via a plurality of data lines, a data driver for driving the plurality of data lines, a timing controller for controlling driving timing of the data driver, and a charge sharing unit comprising a first charger allocated to a first data line group of the plurality of data lines, and a second charger allocated to a second data line group of the plurality of data lines, the charge sharing unit selectively performing charging and discharging operations among the first data line group, the first charger, the second data line group and the second charger under control of the timing controller.05-16-2013
20130120350ELECTROOPTICAL DISPLAY APPARATUS AND ELECTRONIC DEVICE - The electrooptical display apparatus includes pixels, and scan lines and data lines arranged in a matrix. The apparatus further includes pixel switching elements each enabling, in response to application of a selection voltage to one scan line, application of a pixel voltage to one pixel in a pixel row corresponding to the one scan line through one data line, a voltage producing part producing a sampling voltage that is to be supplied to the data lines and that monotonously changes while the selection voltage is applied to the scan line, a voltage sampling part sampling the pixel voltage from the sampling voltage, a sampling number detecting part detecting number of pixels for which a same voltage is sampled, and a controller lowering a frequency of sampling of the pixel voltage when the detected number is a predetermined number.05-16-2013
20130120351STEREOSCOPIC IMAGE DISPLAY - 3D filter driving voltages can be stably supplied to the 3D filter via flexible printed circuit for distributing first to third voltages of the 3D filter driving voltage, even if electrodes of the 3D filter are shorted, by supplying the 3D filter driving voltages to the 3D filter in a distributed fashion.05-16-2013
20100141632LIQUID CRYSTAL DISPLAY AND DISPLAY APPARATUS - A liquid crystal display includes a liquid crystal panel switchable between normal mode for displaying images and standby mode, a control circuit coupled to the liquid crystal panel controlling the liquid crystal panel mode according to video signals transmitted thereto, and a power board providing a power voltage to the control circuit.06-10-2010
20090160842DRIVE CIRCUIT - A drive circuit is disclosed. The drive circuit includes a first p-typed thin film transistor (PTFT), a second PTFT, a first n-typed thin film transistor (NTFT), a second NTFT and a capacitor. The drain of the first PTFT is coupled to a first electrical line, and the gate thereof is coupled to a first clock line. The drain of the second PTFT is coupled to a second clock line, and the source thereof is coupled to an output. The source of the first NTFT is coupled to a second electrical line, and the gate thereof is couple to an output of a preceding drive circuit. The source of the second NTFT is couple to a third electrical line, the gate thereof is coupled to a third clock line, and the drain thereof is coupled to the output. The capacitor has one end coupled to the second electrical line, while the other end is coupled to the source of the first PTFT, the drain of the first NTFT and the gate of the second PTFT.06-25-2009
20110205218DECODER AND DATA DRIVER FOR DISPLAY DEVICE USING THE SAME - Disclosed is a decoder, receiving the first and the second reference voltage groups and selecting a reference voltage in accordance with a received digital signal, including a first sub-decoder receiving the first reference voltage group, a second sub-decoder receiving the second reference voltage group 08-25-2011
20090128539Plasma display device and driving method thereof - A scan electrode driver includes a scan integrated circuit including first and second control signal input terminals, a data input terminal, first and second voltage terminals and a plurality of output terminals, and a logic element. A voltage of the plurality of output terminals may be a voltage of one the plurality of voltage terminals at least based on a level of a control signal transmitted to the first control signal input terminal. The logic element may be adapted to perform an operation on the control signal to generate a second control signal to be applied to the second control signal input terminal. The scan integrated circuit may establish a voltage of the plurality of output terminals to be a voltage of the first or second voltage terminal based on a level of the control signal.05-21-2009
20120139893METHOD AND APPARATUS FOR DRIVING A LIQUID CRYSTAL DISPLAY DEVICE - A source driver comprising a first DAC with a positive polarity (PDAC), a second DAC with a negative polarity (NDAC), first and second operational amplifiers. Each operational amplifier is characterized with a 1st & 2nd stage and an output stage. The PDAC and NDAC are coupled to the first and second operational amplifiers through a first pair of switches. The 1st & 2nd and output stages of the first operational amplifier are coupled to the 1st & 2nd and output stages of the second operational amplifier through a second pair of switches. The first and second operational amplifiers are coupled to odd data lines and even data line through a third pair of switches.06-07-2012
20120068992DRIVING METHOD FOR ORGANIC ELECTROLUMINESCENCE LIGHT EMITTING SECTION - A driving method for an organic EL light emitting section achieves optimization of mobility correction for a transistor of a driving circuit in response to luminance. In a driving circuit formed from a driving transistor, an image signal writing transistor and a capacitor section having a pair of electrodes, a driving method carries out a pre-process, a threshold voltage cancellation process and a writing process. A variable correction voltage which relies upon the image signal voltage is applied to a first node of the capacitor and a voltage which is higher than a potential of the second node of the capacitor in the threshold voltage cancellation process is applied to the drain electrode of the driving transistor, between the threshold voltage cancellation process and the writing process, to raise the potential of the second node in response to a characteristic of the driving transistor.03-22-2012
20120068991ACTIVE MATRIX DISPLAY DEVICES AND ELECTRONIC APPARATUSES USING THE SAME - A display device capable of preventing display noise from being induced in the first frame period after a power source is input thereto. The display device includes pixels arranged in a matrix formed by rows and columns. Each pixel includes a pixel electrode, a display element, a storage capacitor coupled to the display element through the pixel electrode, and a switch element. The display device further includes a capacitive storage (CS) driving device which is synchronized with the scan line driving device to switch a potential of each electrode between two values one row by one row. Each electrode is disposed opposite to corresponding pixel electrode through a storage capacitor and is coupled to a corresponding CS line. After a power source is input and before the first scanning operation is performed, the CS driving device sets a potential of each capacitive storage line to one of the two values.03-22-2012
20120068990DISPLAY MEDIUM AND DISPLAY DEVICE - A display medium includes a pair of substrates, a dispersion medium sealed between the pair of substrates, a migrating particle group dispersed in the dispersion medium, and a surface layer provided on at least one of the facing surfaces of the pair of substrates and including a polymer compound that is a copolymer containing the following constitutional unit (A) and constitutional unit (B):03-22-2012
20080316196DISPLAY DEVICE AND DRIVING CIRCUIT FOR DISPLAY DEVICE - A driving circuit for a display device for selectively outputting a driving voltage positive or negative with respect to a given reference voltage of the display device in accordance with an image signal, includes an input stage circuit; and an output stage circuit for outputting a driving voltage between a given high voltage and a first intermediate voltage or a driving voltage between a second intermediate voltage and a given low voltage in accordance with a pair of output stage control signals output from the input stage circuit.12-25-2008
20090002357Drive Circuit, A Display Device Provided With The Same - In one embodiment of the present invention, a drive circuit includes: a logic block connected between a source of a first voltage and a source of a second voltage, and a sampler including a plurality of sampling circuits. Each sampling circuit is for sampling, in use, an input data signal and outputting a voltage to a respective output. The drive circuit further includes a voltage booster having plurality of voltage boost circuits, each voltage boost circuit being associated with a respective one of the sampling circuits and, in use, generating a boosted voltage signal and providing the boosted voltage signal to the respective sampling circuit. Each voltage boost circuit is connected between the source of the first voltage and the source of the second voltage. The logic block may be, but is not limited to, a shift register.01-01-2009
20090015578LIGHT EMITTING DISPLAY DEVICES - An active matrix electroluminescent display device has power supply lines (01-15-2009
20090015580User selectable run-time for display device and method of reducing power consumption for display device - A portable display device includes at least one power input port, a battery power supply, an image display region powered by one of the at least one power input port and the battery power supply, a control system for determining receipt of external power by the at least one power input port and for determining current capacity of the battery power supply, and a selection system for selecting a run-time period for displaying images within the image display region, wherein the control system provides a first control signal to the selection system for the selection system to provide a user with a maximum available run-time period based upon the determined receipt of the external power and the determined current capacity of the battery power supply.01-15-2009
20090015579MECHANICAL RELAXATION TRACKING AND RESPONDING IN A MEMS DRIVER - The invention comprises systems and methods for adjusting a driving voltage based on relaxation information of a movable reflective layer of an interferometric modulator. In one example, a device for driving a MEMS device having a movable reflective layer comprises a sensing unit configured to generate information related to one or more of time, environmental exposure, and frame rate of a movable reflective layer of at least one MEMS device, and a driver circuit configured to apply voltages to drive said at least one MEMS device, said voltages being based at least in part on said information.01-15-2009
20090051677SUPPLY VOLTAGE REMOVAL DETECTING CIRCUIT, DISPLAY DEVICE AND METHOD FOR REMOVING LATENT IMAGE - A supply voltage removal detecting circuit, a display device and method for removing a latent image when a supply voltage is disconnected, in which the supply voltage removal detecting circuit includes a voltage controller, a detection signal generator, and an output unit. The voltage controller controls voltages such that when a first supply voltage and a second supply voltage stay at a first level, the voltage at a first node is greater than the voltage at a second node, and when the first supply voltage or the second supply voltage becomes a second level, the voltage at the second node stays at a specific level, and the voltage at the first node is less than the specific level. The detection signal generator generates a detection signal by comparing the voltage at the first node with the voltage at the second node. The output unit prevents the voltage controller and the detection signal generator from faulty operations, and inverts the detection signal in response to an operation enabling signal to output a detection control signal.02-26-2009
20090058842Devices and methods for controlling a display to conserve power - Devices and methods for controlling display output based application class and/or on one or more monitored device parameters are described herein. These devices and methods can be advantageous because they can reduce power consumption, and can improve user experience. For example, devices and methods comprising determining an application class, wherein for the first class of applications no display simplifications are used, and wherein for the second class of applications a device parameter is monitored such that if a first state is detected, full graphics are displayed, and if the second state is detected, simplified graphics are displayed are described. In some embodiments, the applications can include video applications, audio applications, and radio applications, for example. In some embodiments, the device parameter can comprise user input frequency, power supply charge, and backlight intensity, for example.03-05-2009
20110227907HEAD-MOUNTED DISPLAY - A head-mounted display is provided. The head-mounted display includes an image presentation unit configured to present an image to an eye of a user, a control unit configured to play content data and control the image presentation unit to present an image obtained by playing the content data, a power supply management unit configured to manage supply and cutoff of power to the image presentation unit, and a detection unit configured to detect a segmentation point of content indicated by the content data played by the control unit. The control unit is configured to stop playing the content data in response to the detection unit detecting the segmentation point. The power supply management unit is configured to cut off the power supplied to the image presentation unit in response to the detection unit detecting the segmentation point.09-22-2011
20110227901VARIABLE-BIAS POWER SUPPLY - A responsive, low-power display panel power supply is provided. In one embodiment, such a display panel power supply may include a regulator whose responsiveness varies depending on the bias current it consumes, and a current source that provides a variable bias current. The regulator may provide the display panel a supply voltage and a supply current based on a reference voltage and a bias current. Various events taking place in the display panel, such as toggling at COM lines, source lines, and/or gate lines may cause parasitic capacitances within the display panel to draw more or less supply current. To ensure the regulator remains suitably responsive to such changes in supply current, while reducing the total power consumed by the power supply, the current source may provide a higher bias current to the regulator at least while the supply current is changing than at certain other times.09-22-2011
20110141097ORGANIC LIGHT EMITTING DISPLAY DEVICE AND DRIVING VOLTAGE CORRECTION METHOD THEREOF - An organic light emitting display device is capable of post-correcting driving voltages for driving a panel of the display device after a manufacturing process of the display device has been completed. The display device includes: a display unit including pixels located at crossing regions of scan lines and data lines; a scan driver for supplying scan signals to the scan lines; a data driver for supplying data signals to the data lines; a timing controller for controlling the scan and data drivers; and a power supply for supplying driving voltage to the display unit, the scan and data drivers, and the timing controller. The power supply generates driving voltages for the display unit, the scan and data drivers, and the timing controller by using input power, corrects the driving voltages by accessing offset values stored during testing of the generation of the driving voltages, and outputs the corrected driving voltages.06-16-2011
20130215098SCANNING DRIVE CIRCUIT AND DISPLAY DEVICE INCLUDING THE SAME - Disclosed herein is a display device, including display elements two-dimensionally disposed in a matrix; scanning lines, initialization control lines, and display control lines extending in a first direction; data lines extending in a second direction different from the first direction; and a scanning drive circuit.08-22-2013
20090096774DISPLAY AND METHOD OF MANUFACTURING THE SAME - A method of manufacturing a display includes selecting at least one of pixels which can be seen as a luminous line or a luminous dot with a dark line-like tail when an inspection image is displayed, and breaking a first conductive path connecting a display element to a power supply terminal and a second conductive path connecting the first conductive path to a video signal line in the selected pixel.04-16-2009
20090184953PLASMA DISPLAY DEVICE - A plasma display device includes the following elements: an image signal conversion circuit for converting an image signal into an image data; a data electrode driver circuit for driving data electrodes according to the image data; a power calculation circuit for calculating a power consumption of the data electrode driver circuit according to the image data; and a temperature calculation circuit for calculating a temperature of the data electrode driver circuit according to the image data. The image signal conversion circuit converts the image signal into an image data decreasing the power consumption of the data electrode driver circuit at least when the calculated power consumption exceeds a predetermined power threshold value, or when the calculated temperature exceeds a predetermined temperature threshold value.07-23-2009
20110227905DRIVER AND DISPLAY DEVICE USING THE SAME - A driver includes a digital-to-analog converter configured to perform digital-to-analog conversion on digital gray scale data to output an analog output gray scale voltage; an output amplifier section having a first input connected with an output of the digital-to-analog converter, and an output connected with an output node, and a second input connected with the output of the output amplifier section through a negative feedback wiring, and configured to output the output gray scale voltage to the output node in response to a control signal in an operation mode. A test switch is connected between the first input and the second input in the output amplifier section and is configured to output the output gray scale voltage to the output node in response to a test signal in a test mode for a test of an output of the digital-to-analog converter.09-22-2011
20110227904ORGANIC LIGHT EMITTING DISPLAY AND METHOD OF DRIVING THE SAME - An organic light emitting display has increased flexibility in controlling the voltage range of data signals. The organic light emitting display includes a scan driver for driving scan lines and emission control lines, a data driver for supplying data signals to data lines, pixels positioned at crossing regions of the scan lines and the data lines, first power source lines coupled to a first power source and the pixels, horizontal power source lines coupled to the pixels, a second power source line coupled to a second power source different from the first power source, and first switching elements respectively coupled between the horizontal power source lines and the second power source line. Each of the pixels stores a voltage corresponding to the second power source and the data signal and controls an amount of current that flows from the first power source to correspond to the stored voltage.09-22-2011
20110227903PIXEL AND ORGANIC LIGHT EMITTING DISPLAY DEVICE USING THE SAME - A pixel has a simple structure and is capable of compensating for a threshold voltage of a driving transistor. The pixel includes: an organic light emitting diode; a second transistor coupled between a first power source and the organic light emitting diode and configured to control an amount of current flowing from the first power source to the organic light emitting diode; a first transistor coupled between a gate electrode of the second transistor and a data line and turned on when a scan signal is supplied a scan line; a third transistor coupled between the second transistor and the first power source and configured to be turned off when the first transistor is turned on and to be turned on when the first transistor is turned off; a first capacitor coupled between a gate electrode and a first electrode of the second transistor; and a second capacitor coupled between the first power source and a common node at which the first electrode of the second transistor and the first capacitor are coupled to each other.09-22-2011
20090231321SOURCE DRIVING CIRCUIT OF LCD APPARATUS - A source driver circuit of an LCD apparatus with a small occupied area and low power consumption is disclosed. The source driver circuit comprises a reference voltage circuit, a negative voltage driving DAC, a positive voltage driving DAC, an invert amplifier, a non-invert amplifier and a voltage selector. The reference voltage circuit generates a reference voltage. The negative voltage driving DAC divides the display data into negative gradation voltages. The positive voltage driving DAC divides the display data into positive gradation voltages. The invert amplifier works as an analogue buffer for the negative gradation voltages for driving the LCD apparatus and the non-invert amplifier works as an analogue buffer for the positive gradation voltages for driving the LCD apparatus. The voltage selector provides the reference voltage to the positive and negative voltage driving DACs.09-17-2009
20090231320Plasma Display Device - A plasma display device which stops power supply or drive of a device by detecting an abnormality. The plasma display device is provided with a panel section (09-17-2009
20110221738LIQUID CRYSTAL DISPLAY DEVICE AND ELECTRONICS DEVICE - A liquid crystal display device of the present invention includes a two-dimensional sensor array in which optical sensor circuits are two-dimensionally positioned. The respective optical sensor circuits are provided with a photodiode (09-15-2011
20080316197CONSERVING POWER IN A COMPUTER SYSTEM - A computer system may comprise a processor, a chipset, and a memory. The processor may enter low-power mode based on the occurrence of pre-specified events. A graphics controller of the chipset may drive the display such as the LVDS display panel to a self-refresh mode and then enter low-power mode. The display may refresh the pixels with the data persevered prior to entering the self-refresh mode. The memory and a memory controller of the chipset may also enter low-power mode. The graphics controller may enter normal mode after the processor enters the normal mode and may pull back the display to the normal mode.12-25-2008
20110227902LIQUID CRYSTAL DISPLAY AND DRIVING METHOD THEREOF - A liquid crystal display and method for driving the liquid crystal display are provided. The liquid crystal display includes a liquid crystal panel assembly including a plurality of gate lines, a plurality of data lines intersecting the gate lines, a plurality of switching elements connected to the gate lines and the data lines, a plurality of pixel electrodes connected to the switching elements, and a reference electrode opposing the pixel electrodes, a gate driver for applying gate signals to the gate lines to activate the switching elements, a data driver for applying data voltages that are be applied to the pixel electrodes to the data lines, and a reference voltage generator for generating first to third reference voltages to be respectively applied to first to third positions of the reference electrode, the first reference voltage being smaller than the third reference voltage and the third reference voltage being smaller than the second reference voltage, and the first position being closer to the gate driver than the third position and the third position being closer to the gate driver than the second position.09-22-2011
20100149163USE OF SPATIAL HIGH-PASS FILTERING OF IMAGES TO INCREASE PERCEIVED BRIGHTNESS OF EMISSIVE DISPLAY - A method enables power savings in an OLED display by shortening the duty cycle of selected OLEDs of the OLED display. The selected OLEDs may include, for example, OLEDs used to generate particular objects that appear to be inactive such as inactive windows. Shortening the duty cycles of the selected OLEDs results in overall power savings when operating the OLED display.06-17-2010
20100149162METHOD FOR COMPENSATING VOLTAGE DROP OF DISPLAY DEVICE, SYSTEM FOR VOLTAGE DROP COMPENSATION AND DISPLAY DEVICE INCLUDING THE SAME - The present invention relates to a method for compensating voltage drop of a display device, a system for voltage drop compensation, and a display device including the same. A method for compensating a voltage drop of a display device including a display panel, a maximum compensation voltage table MLEC LUT for voltage compensation when a voltage drop is a maximum in the display panel, and a voltage drop coefficient table LEC LUT representing voltage drop coefficients with respect to total output currents during one frame according to an embodiment of the present invention comprises: receiving an input image signal; gamma-converting the input image signal to obtain a pre-compensation data voltage; obtaining a first total output current flowing in all pixels PX of the display panel during one frame based on the input image signal; obtaining a first voltage drop compensation voltage V_LEC based on the voltage drop coefficient table LEC LUT and the maximum compensation voltage table MLEC LUT; and adding the first voltage drop compensation voltage V_LEC to the pre-compensation data voltage to obtain the post-compensation data voltage.06-17-2010
20090244050PANEL AND DRIVING CONTROLLING METHOD - The present invention provides a panel, including: a plurality of pixel circuits disposed in rows and columns and each including a light emitting element for emitting light in response to driving current, a sampling transistor for sampling an image signal, a driving transistor for supplying the driving current to the light emitting element, and a storage capacitor for storing a predetermined potential; and a power supplying section configured to supply a power supply voltage of a high potential or a low potential at a time to all of the pixel circuits arranged in rows and columns; the power supplying section setting the power supply voltage to be supplied to the low potential, with which the gate-source voltage of the driving transistor becomes higher than a threshold voltage of the driving transistor, by Q times within a one-field period, Q being equal to or greater than 2.10-01-2009
20120105426DISPLAY DEVICE - A display device includes pixels, each including a switching element; a shift register comprising stages coupled with the switching elements and sequentially generating output signals; clock signal lines transmitting clock signals; at least a control signal line transmitting a control signal; and terminal lines connecting the clock signal lines and the control signal with the stages, wherein the terminal lines comprise at least one common terminal line commonly connected with at least two stages.05-03-2012
20120194501IMAGE DISPLAY DEVICE - In an image display device, a transistor formed in each pixel circuit is an N-channel transistor. Each pixel circuit further comprises an enable switch disposed in a current path supplying electric current to a light-emitting element and a supplementary capacitor for controlling changes in voltage of a terminal of a holding capacitor at one end opposite another terminal connected with writing switch. The light-emitting element is connected between the source of a driver transistor for supplying a current to the light-emitting element and a low-voltage side power line, an enable switch is connected between the drain of the driver transistor and a high-voltage side power line, and supplementary capacitor is connected between the drain of driver transistor and a predetermined power line.08-02-2012
20120105424DISPLAY MODULE AND DISPLAY SYSTEM - Disclosed is a display module including a transparent display panel and a frame to fix a side of the transparent display panel, wherein the frame has a communication unit to receive data from the outside, a controller to process the received data and to output a drive command corresponding to the processed data and a display drive unit to drive the transparent display panel in response to the drive command from the controller. A display system includes a system body and a display module detachably mounted in the system body.05-03-2012
20120105423Scan Driver and Display Device Comprising the Same - A scan driver and a display device including the same. The scan driver includes a plurality of shift registers including an input signal terminal into which an initial signal or an output signal of a previous stage is inputted, two clock signal terminals to which 2 phase clock signals are transferred, two control signal terminals to which a first control signal and a second control signal controlling a driving mode of simultaneously driving or sequentially driving output signals of all stages are transferred, and output signals terminals from which the output signals are outputted, wherein in the sequential driving mode, the first control signal and the second control signal are transferred as a predetermined first level voltage and in the simultaneous driving mode, the first control signal and the second control signal are transferred alternately as the first level voltage and a predetermined second level voltage.05-03-2012
20120105421PIXEL DRIVING CIRCUIT OF AN ORGANIC LIGHT EMITTING DIODE - A pixel driving circuit of an organic light emitting diode (OLED) includes a first switch, a first capacitor, a transistor, a second switch, a second capacitor, and an OLED. The operation of the pixel driving circuit includes four stages of reset, threshold voltage compensation, data writing, and emitting. The pixel driving circuit compensates the threshold voltage of the transistor, so the driving current of the OLED is only related to the data voltage and the reference voltage.05-03-2012
20120105419Driving Circuit for Liquid Crystal Pixel Array and Liquid Crystal Display Using the Same - A driving circuit with reduced power consumption and a liquid crystal display using the same. The driving circuit includes at least a power circuit, a source driver and a VCOM driver. The power circuit is coupled to a power supply to receive a power signal to generate a positive supply voltage and an inverted power signal. The source driver includes a first source operational amplifier. The first source operational amplifier is powered by the positive supply voltage and a power ground, to couple a positive polarity display voltage to a first terminal of a first display capacitor of a pixel array. The VCOM driver includes a VCOM operational amplifier. The VCOM operational amplifier provides a second terminal of the first display capacitor with a VCOM voltage, and a negative power terminal of the VCOM operational amplifier is coupled to the inverted power signal.05-03-2012
20100149166DISPLAY, METHOD OF DRIVING DISPLAY, AND ELECTRONIC DEVICE - A display includes a pixel array section having pixels in a matrix, each pixel including an electro-optical device, a writing transistor writing a video signal, a storage capacitor retaining the video signal, and a driving transistor driving the electro-optical device based upon the video signal; scan lines for respective rows of the unit providing a scanning signal to the writing transistor; power supply lines for respective rows of the unit selectively providing a first potential and a second potential, lower than the first potential, to a drain electrode of the driving transistor; and signal lines for respective columns of the unit selectively providing the video signal and a video signal reference potential to the writing transistor; wherein a potential setting period is provided from when the pixels are turned off until the first potential is provided to the power supply line.06-17-2010
20090122051Plasma display device and driving method thereof - The plasma display device includes a plurality of discharge cells, a controller, and a driver. The controller is configured to divide one frame into a plurality of subfields each having a weight value, determine a sustain number allocated to one frame according to a screen load ratio calculated based on video signals inputted for a duration of a frame, allocate the sustain number allocated for one frame to the subfields, and set a minimum sustain number allowed at each screen load ratio and a target sustain number at each screen load ratio. The driver is configured to apply sustain pulses of as many as the sustain number allocated to each subfield to the discharge cells in each subfield. Whenever a first screen load ratio of a current frame is smaller than a second screen load ratio of a previous frame coming right before the current frame, the controller determines a starting point according to a sustain number of the previous frame and the sustain number of the first screen load ratio, and gradually increases the sustain number of the first screen load ratio from the starting point to the target sustain number of the first screen load ratio through subsequent frames.05-14-2009
20090122050COOLING APPARATUS OF PLASMA DISPLAY PANEL AND METHOD FOR STABILIZING PLASMA DISPLAY PANEL - A cooling apparatus of a plasma display panel and a method for stabilizing the PDP to minimize the residual image on the display are disclosed. In particular, the present invention minimizes the residual image that is generated due to the degeneration of phosphors caused by a high voltage and a high temperature.05-14-2009
20090122048DISPLAY DRIVE DEVICE - A display drive device includes a low-voltage circuit section driven by a first power supply potential and a high-voltage circuit section driven by a second power supply potential higher than the first power supply potential. The display drive device further includes a voltage supply circuit for supplying a third power supply potential different from the first and second power supply potentials, a common power supply line for connecting the third power supply potential to each of a plurality of output terminals, an output selection switch circuit for temporarily switching between display data output via the high-voltage circuit section to each output terminal, and the common power supply line, during a predetermined period, and a display data determining circuit for generating a control signal for controlling the output selection switch circuit. Thereby, the common power supply line is temporarily selected and controlled without signal collision when display data is switched.05-14-2009
20090122049Display Device and Controlling Method Thereof - A conventional setting voltage was a value with an estimated margin of a characteristic change of a light emitting element. Therefore, a voltage between the source and drain of a driver transistor V05-14-2009
20110128276Display apparatus and display drive method - A display apparatus includes: a pixel array including pixel circuits arranged in a matrix form, in which each pixel circuit has a light-emitting device, a drive transistor applying a current corresponding to a gate-source voltage to the light-emitting device, a sampling transistor inputting a voltage supplied from a signal line to a gate of the drive transistor, and a storage capacitor connected between the gate and source of the drive transistor so as to store a threshold voltage of the drive transistor and an input video signal voltage; a signal selector that supplies a reference voltage and the video signal voltage to signal lines arranged in columns on the pixel array in horizontal periods corresponding to the number of horizontal lines in one unit when the horizontal lines of the respective pixel circuits of the pixel array are grouped as one unit; and a scanner that applies a pulse to control lines arranged in rows on the pixel array so as to control the sampling transistor of the pixel circuit.06-02-2011
20100156878SYSTEMS FOR DRIVING DISPLAYS - A system is configured to drive a display device having a number of cholesteric liquid crystal (CHLC) pixels. The system comprises a processor configured to receive a first set of gray levels for a first image frame and a second set of gray levels for a second image frame, wherein the first set of gray levels is related to a first intensity state of each of the CHLC pixels in the first image frame and the second set of gray levels is related to a second intensity state of each of the CHLC pixels in the second image frame, and a look-up table (LUT) configured to output a third set of gray levels based on the first set of gray levels and the second set of gray levels, wherein the third set of gray levels is related to an addressing voltage to be written to each of the CHLC pixels so as to change each of the CHLC pixels from the first intensity state to the second intensity state.06-24-2010
20100259528Dynamic Adaptation of the Power Supply Voltage for Current-Driven EL Displays - A display driver control circuitry and method for controlling a display driver for an electroluminescent display, the display comprising at least one substantially constant current generator for driving the display element, the control circuitry comprising: a drive voltage sensor for sensing a drive voltage on a first line in which the current is regulated by the constant current generator; a reference voltage generator for providing a reference voltage offset from a supply voltage provided from a supply line to the constant current generator; means for determining a difference between the reference voltage and the drive voltage and for generating an adjustment signal, and wherein a voltage controller is configured to adjust the supply voltage responsive to the adjustment signal.10-14-2010
20090115767POWER-SAVING MECHANISM OF DISPLAY AND CONTROL METHOD USING THE SAME - A power-saving mechanism of display and a control method using the same are disclosed. The mechanism has no need as the prior art where a user's setting is needed to decide whether or not entering a power-saving operation mode or shutting off the display. The display power-saving mechanism of the present invention can judge whether or not the display frames are still; if the frames are still in a certain time, the display automatically enters the power-saving operation mode. The display power-saving mechanism is disposed in the hardware architecture of the display and capable of automatically judging whether or not to enter the power-saving operation mode without the user's setting.05-07-2009
20100188392Organic light emitting display device, method of driving the same and power saving unit thereof - An organic light emitting display device includes a pixel unit including data lines, a data driving unit providing data signals corresponding to first and second data to the data lines, a timing controlling unit controlling the data driving unit and supplying the first data from the outside, and a power supply for the pixel, data driving, and timing controlling units. A converting unit may receive the first data from the timing controlling unit, convert the first data into the second data, and transmit the converted second data to the data driving unit. When the first data supplied from the timing controlling unit has a digital bit corresponding to one of a first range for displaying white-related colors and a second range for displaying black-related colors, the converting unit converts the first data into the second data having a digital bit corresponding to one of the second and first ranges, respectively.07-29-2010
20100001984GAMMA VOLTAGE CONTROLLER, GRADATION VOLTAGE GENERATOR AND DISPLAY DEVICE HAVING THE SAME - A gamma voltage controller includes a gamma distribution unit that generates a plurality of voltages by performing voltage divisions between a first gradation voltage and a N(th) gradation voltage, a gamma selection unit having first through M(th) gamma selectors that respectively select first through M(th) gamma voltages among the plurality of voltages, a gamma buffer unit that changes inflection points of the gamma curve, and buffers the first through M(th) gamma voltages to output buffered first through M(th) gamma voltages, and a gradation distribution unit that generates second through N−1(th) gradation voltages by performing voltage divisions among the buffered first through M(th) gamma voltages. Each of the buffers includes a feedback loop, and some of the buffers change inflection points of the gamma curve.01-07-2010
20110175896DISPLAY DRIVING CIRCUIT AND METHOD THEREOF - A display driving circuit has a scan switch, an assistant unit, several storage switches, and several storage units. The scan switch couples to a data line. The assistant unit couples to the scan switch. The storage switches couple to the assistant unit. Each storage unit couples to the assistant unit by one of the storage switches. The assistant unit is shared by the storage units to compensate for several driving voltages or several driving currents of the storage units.07-21-2011
20110175893DISPLAY MEDIUM AND DISPLAY APPARATUS - The present invention provides a display medium including a pair of substrates; pixel electrodes disposed on one of the pair of substrates; a common electrode disposed on the other substrate of the pair of substrates; and a display layer, the common electrode includes two or more common electrode layers containing a first common electrode layer and a second common electrode layer which being disposed across a gap in a thickness direction, and electrical voltages thereof being controlled independently of each other, the first common electrode layer containing at least one electrode unit and at least one non-electrode area corresponding to a disposition of the pixel electrodes, and the second common electrode layer containing at least one second electrode unit, the at least one second electrode layer completely overlapping with at least the at least one non-electrode area of the first common electrode layer in a thickness direction.07-21-2011
20110175892POWER SOURCE CIRCUIT AND LIQUID CRYSTAL DISPLAY APPARATUS HAVING THE SAME - A power source circuit includes an inductor, a reservoir capacitor, and a switching control part that generates ON/OFF control signals to each of first and second switches. The first switch is connected between a first power voltage terminal and a first node to form a first current path between the first power voltage terminal and the first node in response to a driving signal of the switching control part. The second switch is connected between the first node and a second power voltage terminal to form a second current path between the first node and the second power voltage terminal in response to the driving signal. The inductor is connected to the first node to provide an average voltage between the first power voltage terminal and the second power voltage terminal. The capacitor is connected in parallel with the inductor to store the average voltage.07-21-2011
20110175891PLASMA DISPLAY APPARATUS - A plasma display apparatus includes a plasma display panel including plural scanning electrodes extending in a first direction and plural address electrodes extending in a second direction crossing the first direction, an address driver to drive the address electrodes, a power recovery circuit including an inductor and a capacitor, and a switch provided in the address driver to switch connection and disconnection between the address electrodes and the power recovery circuit.07-21-2011
20090079723POWER SAVING SWITCH AND ELECTRONIC APPARATUS WITH SAME - An electronic apparatus (03-26-2009
20090079722PLASMA DISPLAY DEVICE - Provided is a plasma display device, in which a brightness difference caused in a plasma display panel of a large screen is reduced. In order to reduce the value of a streaking or a brightness difference on the plasma display panel screen and to reduce the brightness difference between the central portion and the two end portions of the screen, the plasma display device comprises current limiting means (03-26-2009
20090079724METHOD AND DEVICE FOR AVOIDING IMAGE STICKING - The present invention directs to a method an device for avoiding image sticking, the method for avoiding image sticking is to adjust a real common electrode voltage by difference between the real common electrode voltage and an ideal common electrode voltage, said difference is obtained by acquiring a real pixel electrode voltage on a panel; the device comprises a difference generation block for generating the difference between the real common electrode and the ideal common electrode voltage and an adjusting block for adjusting the real common electrode voltage, said adjusting block comprises an enabling block for generating a common electrode voltage adjustor enabling signal, a control block for generating a common electrode voltage adjustor control signal, and a common electrode voltage adjustor for adjusting the real common electrode voltage. With the method and device of the present invention, the coupling voltage's influence on a pixel electrode can be eliminated, and image sticking can be alleviated or avoided, and no impact on flicker is generated.03-26-2009
20100259529POWER SUPPLY CIRCUIT AND DISPLAY DEVICE INCLUDING THE SAME - An embodiment of the present invention provides a power supply circuit including a charge-pumping booster section which uses switching elements provided only by N-channel transistors yet does not have a problem of voltage drop by threshold value. When a boosted voltage is obtained at a first terminal of a first capacitor in a booster section, a booster control section supplies this boosted voltage to a third capacitor, to boost the voltage further thereby turning ON a first transistor. When a boosted voltage is obtained at a first terminal of a second capacitor in the booster section, the booster control section supplies this boosted voltage to a fourth capacitor, to boost the voltage further thereby turning ON a second transistor. This arrangement eliminates a problem of voltage drop by threshold value in the first and the second transistors which serve as output-side switching elements.10-14-2010
20100259530GATE DRIVE CIRCUIT AND DRIVING METHOD THEREOF - A gate driving circuit receives a plurality of clock signals in a sequence and includes a plurality of cascaded drive units sequentially outputting an output signal, wherein a first-stage drive unit of the gate driving circuit receives a scan start signal or a scan end signal while a last-stage drive unit thereof receives a scan end signal or a scan start signal; wherein a driving direction of the gate driving circuit is reversed by reversing the sequence of the clock signals and exchanging the scan start signal and the scan end signal. The present invention further provides a driving method of a gate driving circuit.10-14-2010
20100259531IMAGE DISPLAY DEVICE AND METHOD OF CONTROLLING THE SAME - An image display device includes a luminescence element, a first capacitor, a driver having a gate connected to a first electrode of the first capacitor and a source connected to an anode of the luminescence element, and a second capacitor connected to a second electrode of the first capacitor. A power source supplies a reference voltage to the first electrode of the first capacitor via a first switch. A data line supplies a signal voltage to the second electrode of the first capacitor via a second switch. A third switch connects the anode of the luminescence element to the second capacitor. A controller supplies the signal voltage to the first capacitor by switching ON the first and second switches when the third switch is OFF, switches OFF the first and second switches to switch ON the third switch, and causes the second capacitor to hold a source potential of the driver while the third switch is ON.10-14-2010
20100188389METHOD FOR DRIVING A LIQUID CRYSTAL DISPLAY MONITOR AND RELATED APPARATUS - A method for driving a liquid crystal display monitor including a display panel with a plurality of pixels includes receiving image data which includes a plurality of image signals corresponding to the plurality of pixels, initiating a column inversion procedure for driving the display panel to display the image data, comparing the plurality of image signals during the column inversion procedure to generate a comparison result, and deciding whether to initiate a charge sharing function of the plurality of pixels according to the comparison result.07-29-2010
20100188391ORGANIC LIGHT EMITTING DISPLAY DEVICE AND METHOD OF MANUFACTURING THE SAME - An organic light emitting display device includes a pixel unit that displays an image corresponding to an amount of driving current flowing from a first power supply to a second power supply, wherein the pixel unit includes a pixel that is formed at an intersection portion of a scan line transferring a scan signal and a data line transferring a data signal. The pixel electrode further includes organic light emitting diodes emitting light according to the driving current, and controlling the magnitude of the driving current by controlling a voltage of the data signal corresponding to voltages from the first power supply and the second power supply and a voltage formed on the organic light emitting diode; a first wire transferring the first power to the pixel in a first direction; and a second wire transferring the first power to the pixel in a second direction, wherein the first wire and the second wire are formed to have a thickness thicker in the mid-portion of the pixel unit and is thinner in an outer-portion of the pixel unit, and a method of manufacturing the same.07-29-2010
20100188390DISPLAY DEVICE AND DRIVING METHOD THEREOF - The present invention relates to a pixel and a data driver, and a driving method thereof to measure degradation of an organic light emitting element and a threshold voltage and mobility of a driving transistor in an organic light emitting device, wherein the degradation of the organic light emitting element and the threshold voltage and the mobility of the driving transistor are measured in a turn-on interval or a frame interval of the display device to amend the data voltage applied to the pixel, and thereby images of improved and uniform quality may be displayed.07-29-2010
20130215095ELECTROWETTING DISPLAY DEVICE AND DRIVING METHOD THEREOF - A display device includes a first electrode, a second electrode, a third electrode, a lyophobic layer, a first liquid, and a second liquid, where the lyophobic layer is lyophobic to the second liquid. A method of driving the display device includes: providing a first potential difference between the first electrode and the third electrode to thereby cause the first liquid to begin moving toward the second electrode; providing a second potential difference between the second electrode and the third electrode while reducing the first potential difference to thereby cause the first liquid to move toward the first electrode; and removing the second potential difference to thereby cause the first liquid to slow down in its movement toward the first electrode or to stop in its movement toward the first electrode.08-22-2013
20130215097DISPLAY DRIVING DEVICE AND METHOD AND LIQUID CRYSTAL DISPLAY APPARATUS HAVING THE SAME - A liquid crystal panel assembly having a first group of pixels and a second group of pixels, gate lines having a first group of gate lines and a second group of gate lines that are connected with the first group of pixels and the second group of pixels, respectively, and data lines each of which is connected with one of the first group of pixels and one of the second group of pixels in every row. Further including a signal controller that receives input image signals and generates two groups of image data, a data driver that receives the two groups of image data, and a gate driving unit including a first gate driver that provides first gate-on signals to the first group of gate lines and a second gate driver that provides second gate-on signals to the second group of gate lines.08-22-2013
20130215099DISPLAY DEVICE, METHOD FOR DRIVING THE SAME, AND ELECTRONIC DEVICE - A display device including a display unit including first and second lines, light emitting elements and pixel circuits; a first drive unit sequentially applying a selection pulse to the first lines; and a second drive unit applying a signal pulse including first to third voltages to each of the second lines. Each of the pixel circuits includes a first transistor sampling the signal pulse, and a second transistor driving one of the light emitting elements. The first drive unit applies the selection pulse when the first voltage is being applied by the second drive unit, before a correction of a threshold voltage of the second transistor is initiated and within a period that the one of the light emitting elements is being turned out, and the first drive unit applies the selection pulse when the second voltage is being applied by the second drive unit.08-22-2013
20100253671PERSISTENTLY ACTIVE DISPLAY SCREEN - A device may include a first display and the second display. The second display may be substantially transparent during an inactive state, and may overlay the first display. In addition, the device may include logic configured to enter a power savings mode upon detecting a first event associated with use of the device, place the second display in the inactive state in the power savings mode, and activate the first display when the second display is in the inactive state.10-07-2010
20100238155PLASMA DISPLAY DEVICE - A plasma display device is provided. In the plasma display device, a plurality of scan electrodes are divided into one or more scan electrode groups, and different driving signals are applied to the scan electrode groups. More specifically, different scan bias voltages are applied to the scan electrodes during a scan period, and different signals are applied to the scan electrodes during a set-down period of a reset period. Therefore, it is possible to stabilize an address discharge in scan electrodes to which scan signals are applied late.09-23-2010
20080259070ACTIVE LIQUID CRYSTAL DISPLAY DRIVERS AND DUTY CYCLE OPERATION - A liquid crystal display (LCD) driving system includes a reference voltage generator to generate a plurality of reference voltages. The LCD driving system also includes a plurality of drive buffers to generate drive voltages according to at least one of the reference voltages, and to drive at least a portion of a liquid crystal display to present data according to the drive voltages.10-23-2008
20110115777DC-DC Converter and Organic Light Emitting Display Device Using the Same - A DC-DC converter having low power consumption by reducing an input current and an organic light emitting display using the same. In one embodiment, a DC-DC converter includes a buck-boost circuit for generating and outputting a second power of a second power source by receiving an input voltage. The buck-boost circuit adjusts and outputs the voltage level of the second power of the second power source in response to the voltage level of the input voltage. A controller controls the buck-boost circuit. The buck-boost circuit includes a first coil coupled between a first node and a ground; a first capacitor having first and second electrodes, the first electrode being coupled to the first node, a first switch coupled between the first node and an input terminal; and a second switch coupled between the second electrode of the capacitor and ground.05-19-2011
20110057925Light Emitting Device and Driving Method Thereof - According to a driving method of applying a reverse bias voltage, capacitance occurs due to a stacked structure of a conductor, an insulator and a conductor, or due to a structure of a TFT. This capacitance prevents normal operation. The invention provides a pixel configuration including at least a driving transistor for driving a light emitting element and a switching transistor for controlling the driving transistor, wherein the switching transistor is turned on in the case of applying a forward bias voltage after applying a reverse bias voltage. As a result, it is prevented that the potential changes due to unwanted capacitive coupling.03-10-2011
20110057924DISPLAY DEVICE AND DRIVE CIRCUIT USED THEREFOR - A drive circuit for driving data lines of a display panel in a display device is provided with grayscale voltage lines, a grayscale voltage supplying section, a DA converter circuit, an output voltage/precharge voltage switch circuitry and an output amplifier circuit. The grayscale voltage supplying section receives a plurality of reference voltages and a precharge voltage, and is configured to output a plurality of grayscale voltages generated from the reference voltages to the respective grayscale voltage lines and to selectively supply the precharge voltage to at least one of the grayscale voltage lines. The DA converter circuit receives the plurality of grayscale voltages, selects one of the plurality of grayscale voltages in response to a video signal and outputs the selected grayscale voltage. The output voltage/precharge voltage switch circuit is configured to selectively output the grayscale voltage received from the DA converter circuit or the precharge voltage received from the at least one grayscale voltage line, to corresponding one of the data lines of the display panel.03-10-2011
20110057923DATA DRIVER - A data driver includes a gray scale voltage generating circuit includes resistance elements connected in series, and configured to generate a plurality of gray scale voltages; a gray scale voltage selecting circuit configured to select a selection gray scale voltage from among the plurality of gray scale voltages based on a digital signal. The gray scale voltage selecting circuit includes selecting circuits provided with MOS transistors for groups of resistance elements; an ESD (Electro-Static Discharge) protection circuit including P-type protection elements connected between a node for a first power supply voltage VDD and the plurality of nodes, and N-type protection elements connected between a node for a second power supply node to which a second power supply voltage VSS and the plurality of nodes; and a dummy gray scale voltage selecting circuit including a plurality of dummy selecting circuits which includes dummy circuit MOS transistors which are connected between the gray scale voltage generating circuit and the gray scale voltage selecting circuit. The plurality of dummy selecting circuits are always turned on to function as resistances.03-10-2011
20110057922DRIVE DEVICE AND DISPLAY DEVICE - A drive device according to the present invention includes a plurality of output amplifier circuits that are connected in parallel, a bias wire that supplies a bias voltage from a bias voltage supply source to the plurality of output amplifier circuits, a power supply wire that supplies a power supply voltage from a power supply voltage supply source to the plurality of output amplifier circuits, and a correction unit that superposes an offset voltage on the bias voltage so that a voltage difference between the power supply voltage and the bias voltage supplied to the plurality of output amplifier circuits is to be desirable.03-10-2011
20120194500PIXEL DRIVER WITH COMMON ELEMENT STRUCTURE - A pixel driver includes an image signal module, a data latch module, a level shifter module, and a format conversion module, wherein the format conversion module includes at least one first conversion unit and a second conversion unit. The data latch module stores the digital signal generated by the image signal module temporarily and then transmits the digital signal to the level shifter module. The level shifter module increases the voltage of the digital signal and then transmits the digital signal to the format conversion module, wherein the conversion units generate analogue signals based on the digital signal received to drive different pixel units.08-02-2012
20130127819DISPLAY DEVICE, METHOD OF LAYING OUT WIRING IN DISPLAY DEVICE, AND ELECTRONIC DEVICE - A display device includes: a pixel array section having pixels arranged in a form of a matrix on a display panel; a first terminal group disposed on the display panel so as to correspond to each control line of a first control line group arranged in each pixel row of the pixel array section; a first wiring group for electrically connecting each terminal of the first terminal group to each control line of the first control line group; a second terminal group disposed on the display panel for a second control line group arranged in each pixel row of the pixel array section with a plurality of control lines as a unit; and a second wiring group for electrically connecting each terminal of the second terminal group to each control line of the second control line group through parts between the terminals of the first terminal group.05-23-2013
20090040210Scan electrode driver for a plasma display - A scan electrode driver for driving a scan electrode, the scan electrode driver including a scan IC coupled between a first node and a second node, and adapted to selectively apply a first voltage and a second voltage that is lower than the first voltage to the scan electrode during an address period, a voltage regulator including a first terminal coupled to the first node, and a capacitor coupled between a second terminal of the voltage regulator and the second node, wherein the voltage regulator is adapted to charge the capacitor with a third voltage that is lower than a voltage difference between the first voltage and the second voltage before the second voltage is applied to the scan electrode.02-12-2009
20090322727DISPLAY CONTROLLING APPARATUS AND DISPLAYING APPARATUS - A display controlling apparatus has a voltage controlling circuit configured to generate an output voltage signal based on image data. The voltage controlling circuit has a digital/analog converting unit configured to convert the image data into a voltage signal, a comparing unit configured to compare a prescripted voltage digital value and the image data, and an output voltage signal selecting unit configured to select a voltage signal as an output voltage signal based on comparison result of the comparing unit, the voltage signal corresponding to the prescripted voltage value or the voltage signal converted by the digital/analog converting unit.12-31-2009
20090073157SIGNAL CONTROL CIRCUIT AND METHOD THEREOF, LIQUID CRYSTAL DISPLAY AND TIMING CONTROLLER THEREOF - A signal control circuit and a method thereof, and a liquid crystal display (LCD) and a timing controller thereof are provided. The signal control circuit of the present invention maintains a voltage level of a driving signal output from the timing controller for driving data drivers to the supply voltage, such that the data drivers may cease outputting display data to the liquid crystal display panel when the LCD is turned off. Therefore, the image sticking, ghost image and fan-out phenomenon occurred when the LCD is turned off may be avoided.03-19-2009
20090073158SEMICONDUCTOR ELEMENT AND DEVICE USING THE SAME - A memory element having a large memory window and a high reliability is provided at low cost by performing high speed write and erase operations at a relatively low voltage and suppressing rewrite degradation. A memory element includes a semiconductor layer arranged on an insulating substrate, a first diffusion layer region and a second diffusion layer region having a conductivity type of P-type, a charge accumulating film for covering a channel region between the first diffusion layer region and the second diffusion layer region and being injected with charges from the channel region, and a gate electrode positioned on a side opposite to the channel region with the charge accumulating film in between.03-19-2009
20090153540DRIVER ARCHITECTURE FOR COMPUTER DEVICE HAVING MULTIPLE GRAPHICS SUBSYSTEMS, REDUCED POWER CONSUMPTION MODES, SOFTWARE AND METHODS - Many computing device may now include two or more graphics subsystems. The multiple graphics subsystems may have different abilities, and may, for example, consume differing amount of electrical power, with one subsystem consuming more average power than the others. The higher power consuming graphics subsystem may be coupled to the device and used instead of, or in addition to, the lower power consuming graphics subsystem, resulting in higher performance or additional capabilities, but increased overall power consumption. By transitioning from the use of the higher power consuming graphics subsystem to the lower power consuming graphics subsystem, while placing the higher power consuming graphics subsystem in a lower power consumption mode, overall power consumption is reduced. A processor executes application software and driver software. The driver software includes first and second driver components for respectively controlling operation of the first and second graphics subsystems. A further proxy driver component routes calls (e.g. API/DDI calls) to one of said first and second driver components, in dependence on which of the first and second graphics system is in use.06-18-2009
20090115769DA converter, data line driving circuit, electro-optical device, driving method thereof, and electronic apparatus - To simplify s configuration of a current mode DA converter. A data line driving circuit includes DA converting units U05-07-2009
20090115768IMAGE PROVIDING APPARATUS, IMAGE DISPLAY APPARATUS, AND IMAGE DISPLAY SYSTEM CONSTITUTED BY THE SAME - An image display system of the present invention includes an image providing apparatus for providing image data by wireless communication using radio waves and an image display apparatus for receiving the image data. The image providing apparatus includes: a data acquisition section for acquiring image data to provide to the image display apparatus; a wireless communication section for providing the acquired image data to the image display apparatus; an infrared reception section for receiving off data transmitted from the image display apparatus; and a control section for, when the off data has been received by the infrared reception section, turning off power to the image providing apparatus by stopping supplying power to the data acquisition section and the wireless communication section.05-07-2009
20080231624Temperature Adaptive Overdrive Method, System And Apparatus - A method and system for calculating an overdrive parameter for a liquid crystal within an LCD device to compensate for temperature variations. An example system includes a temperature sensor for measuring an ambient temperature near a liquid crystal and a memory for storing a lookup table containing a plurality of overdrive parameters. Each overdrive parameter corresponds to a graylevel transition between a previous frame and a current frame, and represents a level at which a liquid crystal is driven in order to achieve a desired response time for the graylevel transition at a reference temperature. A processor extracts the appropriate overdrive parameter from the lookup and calculates an adapted overdrive parameter that adjusts for the difference between the measured ambient temperature and the reference temperature.09-25-2008
20090115770DISPLAY DEVICE AND COMPENSATING METHOD THEREOF - A display device includes a display panel, a gate driver circuit, a source driver circuit, a timing control circuit, current detection circuits, and a programmable voltage generator. The display panel includes display pixel cells and redundancy pixel cells. The gate driver circuit is connected to the display panel via scan lines. The source driver circuit is connected to the display panel via data lines. The timing control circuit is connected to the gate driver circuit, the source driver circuit and the display panel via at least one redundancy scan line. Each of the current detection circuits is adopted for detecting one of the redundancy pixel cells and a working current of one of the display pixel cells to be compensated respectively when the display device enters the compensation mode. The programmable voltage generator is connected to the timing control circuit and the source driver circuit.05-07-2009
20110032244LIGHT-EMITTING ELEMENT DRIVE DEVICE AND LIGHT-EMITTING DEVICE - Power loss and heat output are reduced in a current drive circuit unit of a light-emitting element. A light-emitting element drive device drives N (where N is an integer of 1 or more) light-emitting element groups, and includes a drive voltage generating circuit used as a feedback path of a minimum voltage detection circuit, N current drive circuits, and N or fewer voltage adjustment circuits. The N light-emitting element groups each include at least one light-emitting element. The drive voltage generating circuit supplies a specified voltage from a voltage source to the N light-emitting element groups. The N current drive circuits the N light-emitting element groups by current through the voltage adjustment circuits. Of the N current drive circuits connected to the minimum voltage detection circuit, the current drive circuit with the lowest end voltage is used in the feedback loop of the drive voltage generating circuit. Even if there is a voltage difference between the end voltages of the light-emitting element groups, the end voltage of the current drive circuit is reduced by the voltage adjustment circuit to a voltage equal to or greater than the minimum voltage required for the current drive circuit to operate.02-10-2011
20110032242SEMICONDUCTOR DEVICE INCLUDING LEVEL SHIFTER, DISPLAY DEVICE INCLUDING THE SEMICONDUCTOR DEVICE AND METHOD OF OPERATING THE SEMICONDUCTOR DEVICE - A semiconductor device includes a code generator and a level shifter. The code generator generates a code including one bit that is in a first logic state and at least one bit that is in a second logic state. The level shifter outputs signals that are at a first voltage level or at a second voltage level through a plurality of output terminals in response to the code. The level shifter includes a plurality of voltage controllers and a plurality of voltage converters. All but one of the voltage controllers control first signals output through all but one of the output terminals to be at the first voltage level in response to the at least one bit. One of the voltage converters controls a second signal output through the remaining output terminal to be at the second voltage level in response to the first signals.02-10-2011
20110032240BUFFERING CIRCUIT WITH REDUCED DYNAMIC POWER CONSUMPTION - A buffering circuit with reduced power consumption is provided. The output buffering circuit includes first and second amplifier circuits. The first amplifier circuit includes a first input stage and a first output stage both coupled between a first power voltage and a second power voltage lower than the first power voltage, and an assistant discharging unit configured to provide a discharging current flowing from a first output node to a first intermediate power voltage during a discharging operation of the first amplifier circuit. The second amplifier circuit includes a second input stage and a second output stage both coupled between the first power voltage and the second power voltage, and an assistant charging unit configured to provide a charging current flowing from a second intermediate power voltage to a second output node during a charging operation of the second amplifier circuit. The first and second amplifier circuits can have reduced output voltage ranges and hence reduced total power consumption.02-10-2011
20120032940DISPLAY DEVICE - Noise on a current to be measured is removed. Horizontal power supply lines (PVDD) are arranged in a horizontal direction and supply a current to pixels in respective corresponding horizontal lines. A switch (02-09-2012
20090021508Light source module for display device and display device having the same - A light source module comprises a light source including a plurality of light emitting units and a voltage current source for supplying driving power to the light source according to a plurality of luminance control signals. The luminance control signals are dimming signals. The light source module also comprises a multi-channel current controller for adjusting luminance of the plurality of light emitting units respectively according to the plurality of luminance control signals.01-22-2009
20100309189LIQUID CRYSTAL DISPLAY, CONTROL METHOD THEREOF AND ELECTRONIC DEVICE - A liquid crystal display, applying to the first electrode, a voltage higher and a voltage lower at different timings, detecting a current flowing through the second electrode, designating, as a reference value, the current flowing through the second electrode when the voltage maintained in the liquid crystal element is reset, specifying a first current which is obtained by excluding a charging current due to application of a related higher voltage from currents flowing through the second electrode after the higher voltage is applied to the first electrode, and a second current which is obtained by excluding a charging current due to application of a related lower voltage from currents flowing through the second electrode after the lower voltage is applied to the first electrode, and comparing the first current with the second current, and controlling the first current and the second current based on the comparison result.12-09-2010
20130135284DISPLAY PANEL AND GATE DRIVER THEREIN - A gate driver includes cascade-connected driving stages. Each of the driving stages includes a first shift register circuit and a second shift register circuit. The first shift register circuit is configured for outputting a present stage driving signal and a next stage driving signal. The second shift register circuit is electrically coupled to the first shift register circuit and configured for outputting a present stage gate signal, a first next stage gate signal, and a second next stage gate signal. Furthermore, a display panel is also provided herein.05-30-2013
20130135285POLARIZATION SWITCHING DEVICE, DRIVER OF POLARIZATION SWITCHING DEVICE, AND METHOD OF DRIVING THE SAME - A polarization switching device includes a lower panel; an upper panel facing the lower panel; a liquid crystal layer disposed between the lower panel and the upper panel; and a driver to apply a first driving voltage and a second driving voltage to the lower panel and the upper panel, respectively, the first driving voltage to transition among a center voltage, a first voltage and a second voltage. The first voltage and the second voltage have the same difference in value from the center voltage. The driver includes a voltage changing unit to generate the first voltage and the second voltage based on a digital data input to a first digital-analog converter.05-30-2013
20100302230LIQUID CRYSTAL DISPLAY DEVICE - An LCD device includes dual gate transistors provided to an output portion of the shift register for outputting a gate voltage. As such, the charge/discharge time of the output portion is reduced so the response time of liquid crystal is improved.12-02-2010
20120229442DISPLAY AND METHOD OF DRIVING THE SAME, AS WELL AS BARRIER DEVICE AND METHOD OF PRODUCING THE SAME - A display includes: a display section displaying an image; and a liquid-crystal barrier section having a plurality of liquid crystal barriers each allowed to switch between a light-transmitting state and a light-blocking state. The liquid-crystal barrier section includes a liquid crystal layer, and a first substrate and a second substrate configured to sandwich the liquid crystal layer, the first substrate including a drive electrode formed at a position corresponding to each of the liquid crystal barriers, and the second substrate including a first common electrode, and a second common electrode formed between the first common electrode and the liquid crystal layer.09-13-2012
20110128279DEVICE AND METHOD FOR DRIVING LIQUID CRYSTAL DISPLAY DEVICE - A device for driving a liquid crystal display device includes a liquid crystal panel having a plurality pixel regions formed thereon, a data driver to drive data lines on the liquid crystal panel, a gate driver to drive gate lines on the liquid crystal panel, a driving voltage generating unit to generate a common voltage wherein a level of the common voltage swings every frame, and a timing controller to control the driving voltage generating unit and the gate driver to generate a gate driving voltage wherein a level of the gate driving voltage varies in accordance with the common voltage swinging level.06-02-2011
20110128275FIELD EFFECT TRANSISTOR, DISPLAY ELEMENT, IMAGE DISPLAY DEVICE, AND SYSTEM - A field effect transistor includes a gate electrode to which a gate voltage is applied; a source electrode and a drain electrode for obtaining a current in response to the gate voltage; an active layer provided adjacent to the source electrode and the drain electrode and formed of an oxide semiconductor including magnesium and indium as major components; and a gate insulating layer provided between the gate electrode and the active layer.06-02-2011
20120268442ELECTROPHORETIC DISPLAY APPARATUS AND IMAGE-UPDATING METHOD THEREOF - An electrophoretic display apparatus and an image-updating method thereof are provided. The electrophoretic display apparatus comprises a display panel and a source driver. The display panel comprises a plurality of pixels and a plurality of source lines, and each pixel electrode is electrically coupled to an AC common voltage through a corresponding capacitor. The capacitor comprises a plurality of charged particles. The source driver comprises a first data-latching circuit and a second data-latching circuit. Each of the data-latching circuits comprises a transistor, a capacitor and an inverter. The first data-latching circuit receives image data and a data shift-register output pulse. The second data-latching circuit is electrically coupled between an output terminal of the first data-latching circuit and a source line and is used for receiving a data output pulse.10-25-2012
20090244048Image display apparatus, image pickup apparatus, computer readable recording medium for recording processing program to control image display apparatus, and method of controlling image display apparatus - Image display apparatus includes an EVF-display section which allows the pixel shift element to cyclically vary a spatial position of images displayed on the display element for a high definition display with more pixels compared with the display element by allowing extended image observation via an eye-optical system, an EVF-display control section which controls the EVF-display section in such modes as a four-point pixel shift, a two-point pixel shift, a partial pixel shift, a lowpass filter (LPF), and the pixel shift OFF, each with different power consumption, a power source, a power source state determination section for determining whether the power source is driven by the battery or the external power source, and the remaining battery level, and a pixel shift display determination section for setting the display mode with the lower power consumption in the order of the low-remaining battery level, the high-remaining battery level, and the externally-driven power source.10-01-2009
20110248982SOURCE DRIVER AND DISPLAY APPARATUS AND METHOD FOR DRIVNG A DISPLAY PANEL - A source driver includes a shift register, a latch, a digital to analog converter (DAC), an output buffer, a level shifter, and a comparator. The shift register receives digital image data. The latch stores digital image data under control of the shift register. The DAC is coupled to the latch and converts digital image data to analog image data. The level shifter shifts a voltage level of analog image data, generates a number of first driving voltages, and outputs the first driving voltages to the output buffer. The comparator controls a voltage generator to generate a number of second driving voltages between corresponding two neighboring first driving voltages; and the voltage generator outputs the second driving voltages to the output buffer. The output buffer sequentially outputs the first driving voltages and the second driving voltages.10-13-2011
20110109614DRIVING CIRCUIT AND METHOD OF LIGHT EMITTING DIODE - A driving circuit and a driving method of an light emitting diode (LED) are provided. The driving circuit includes a current source, a voltage source, a voltage detecting unit, a memory unit, and a control unit. The voltage detecting unit detects a present voltage value of the LED. The memory unit records a previous voltage value of the LED. The control unit controls the voltage source to provide a pre-charge voltage to the LED in a driving period, and to cease providing the pre-charge voltage when the present voltage value is no longer less than the previous voltage value. The voltage level of the pre-charge voltage is determined by the previous voltage value. The control unit controls the current source to provide a driving current to the LED in the driving period.05-12-2011
20090184951PLASMA DISPLAY DEVICE AND METHOD OF DRIVING THE SAME - A plasma display device includes a plasma display panel and a controller for receiving a digital image signal corresponding to an image to be displayed during a frame. The controller time divides a frame into a plurality of subfields, generates control signals for driving the respective subfields at an initialization period, an address period, and a sustain discharging period, and generates switching signals corresponding to the respective subfields. The plasma display device also includes a driver for generating different levels of voltages in accordance with the switching signals, and for providing display data with the generated voltages in accordance with the control signals to the plasma display panel. The plasma display device may also generate switching signals corresponding to the temperature sensed by a temperature sensor.07-23-2009
20090066685DRIVING AN IN-PLANE MOVING PARTICLE DEVICE - An in-plane driven moving particle device comprises a first substrate (SUI) and an moving particle material (EM) comprising charged particles (PA), a first electrode (RE) and a second electrode (GE; DE), both arranged on the first substrate (SUI) for generating a predominantly in-plane electrical field in the moving particle material (EM), and a driver (DR). The driver (DR) supplies, during a transition phase wherein an optical state of the moving particle material (EM) has to change, a first voltage (VR) to the first electrode (RE), and a second voltage (VG; VD03-12-2009
20110001745CAPACITIVE LOAD DRIVE DEVICE, PLASMA DISPLAY DEVICE WITH A CAPACITIVE LOAD DRIVE DEVICE, AND DRIVE METHOD FOR A PLASMA DISPLAY PANEL - The invention reduces power consumption, reduces EMI, and produces a stable sustain discharge. The sustain pulse generating circuit includes a power recovery circuit, clamping circuit, and auxiliary circuit. The power recovery circuit has a recovery inductor for LC resonance and a recovery capacitor for power recovery, recovers power stored in the capacitive load of the display electrode pairs to the recovery capacitor by LC resonance, and reuses the recovered power to drive the display electrode pairs. A clamping circuit clamps the display electrode pairs to the supply potential and the ground potential. An auxiliary circuit has an auxiliary capacitor connected in series with the recovery capacitor, and an auxiliary inductor that is used for LC resonance with the auxiliary capacitor, and increases the current flowing to the recovery inductor at the sustain pulse rise and fall to greater than the current that flows only as a result of the LC resonance of the recovery inductor and the capacitive load.01-06-2011
20110025677ORGANIC LIGHT EMITTING DISPLAY AND METHOD OF DRIVING THE SAME - An organic light emitting display capable of reducing power consumption in a standby mode and a method of driving the same. The organic light emitting display includes a pixel unit having a first emission region and a second emission region, wherein the pixel unit is configured to generate a driving current in accordance with data signals and scan signals to emit light so that light is emitted by the pixel unit only in the first emission region in a standby mode, a data driver for transmitting the data signals only to the first emission region in the standby mode, a scan driver for outputting the scan signals, and a power source supplier for generating and outputting voltages of an initialization power source and for blocking the driving current from flowing to the second emission region by utilizing a voltage of the initialization power source in the standby mode.02-03-2011
20110025676ORGANIC LIGHT EMITTING DISPLAY DEVICE AND DRIVING VOLTAGE SETTING METHOD THEREOF - An organic light emitting display device with reduce power consumption is disclosed. Some embodiments include a current detector which measures current over varying drive voltages. The current measurements are used to determine drive voltages for driving the display array.02-03-2011
20110032245SOURCE DRIVER - A source driver drives data lines of a liquid crystal panel in an inversion driving manner. The source driver includes multiple charge averaging switch groups in increments of pixel colors. Each charge averaging switch connects a pairing of the nearest two corresponding data lines assigned to the same color. These two paired data lines are driven with opposite polarities. In many cases, the nearest pixels assigned to the same color have the same gradation. Thus, by performing a charge averaging operation for each of the associated data lines that correspond to such pixels, such an arrangement provides a source driver having the advantage of low power consumption.02-10-2011
20100328296PLASMA DISPLAY DEVICE - A plasma display device that inexpensively improves uniformity of luminance in a vertical direction of a PDP. The plasma display device includes: a plasma display panel (PDP) having an X electrode and Y electrode that are disposed parallel to each other while intersecting an address electrode at a discharge cell; a Y-board assembly that controls the Y electrode of the PDP; a Y-buffer-board assembly including a scan integrated circuit (IC) connected to the Y-board assembly to apply a scan voltage waveform and a sustain voltage waveform to the Y electrode; and a current supply element included in the Y-buffer-board assembly to supply a ground voltage to the Y-board assembly and to prevent overshooting of the sustain voltage waveform.12-30-2010
20120032943Semiconductor Device, and Display Device and Electronic Device Utilizing the Same - A semiconductor device having a normal function means is provided, in which the amplitude of an output signal is prevented from being decreased even when a digital circuit using transistors having one conductivity is employed. By turning OFF a diode-connected transistor 02-09-2012
20110043511Image Display System and Gate Driver Circuit - An image display system includes a gate driving circuit. The gate driving circuit includes several stages of gate drivers each for generating a gate driving signal to drive a row of pixels. Each stage of the gate driver receives a clock signal and a first reset signal. A first stage of the gate driver receives a vertical start pulse as an input signal of the first stage. The remaining stages of the gate drivers respectively receive the gate driving signal generated by a previous stage of the gate driver as the input signal of the remaining stages. Each stage of the gate drivers further receives the gate driving signal generated by a next stage of the gate driver as a second reset signal, and generates the corresponding gate driving signal according to the clock signal, the first reset signal, and the corresponding input signal and second reset signal.02-24-2011
20110043512IMAGE DISPLAY DEVICE AND VIDEO SIGNAL PROCESSING METHOD USED IN SAME - The degree of an influence from wiring crosstalk between signal lines of a data signal transmission line (video signal line) is decided on the basis of an input signal generated in display controlling unit (a timing controller) at a predetermined timing (at each frame period, at each clock pulse period, or at each horizontal period) and, based on a result of the decision, the voltage amplitude of a data signal is adjusted so that it may exceed an input amplitude specification value for data line driving circuits (data drivers) by a predetermined value.02-24-2011
20110115779LIQUID CRYSTAL DEVICE, DRIVING METHOD THEREOF, AND ELECTRONIC APPARATUS - A liquid crystal device includes a capacitive electric potential line driving circuit that supplies one of a low-level and a high-level electric potential as a capacitive electric potential to each of the capacitive electric potential lines, reverses polarity of the capacitive electric potential as a write period for the row corresponding to the corresponding capacitive electric potential line is terminated in each subfield period included in a unit period, and, in a final subfield period included in the unit period, reverses polarity of the capacitive electric potential again at the time period of after reversing the polarity of the capacitive electric potential until terminating the corresponding final subfield period.05-19-2011
20110115780DRIVING METHOD FOR REDUCING IMAGE STICKING - A driving method with reducing image sticking effect is disclosed. The driving method includes applying a voltage on the data lines for trapping impurities crossing the data lines and lowering the degree of the image sticking effect, and applying different asymmetric waveforms to different data lines for trapping impurities crossing the data lines and lowering the degree of the image sticking effect.05-19-2011
20110115778LIQUID CRYSTAL PANEL AND LIQUID CRYSTAL DISPLAY UTILIZING THE SAME - A liquid crystal display includes a liquid crystal panel having a plurality of pixel units and a plurality of common lines, a common voltage driver for providing common voltage signals to the pixel units; and a pre-charging switch unit electrically coupled between a corresponding common line and a selected data line. The corresponding common line is provided with a first common voltage and a second common voltage respectively in two subsequent frame periods, and the pre-charging switch unit is configured to connect the corresponding common line with the selected data line in a predetermined time period before the common voltage signal applied to the corresponding common line is switched from one of the first and second common voltage to another. A liquid crystal panel is also provided.05-19-2011
20100141635LCD PLATEAU POWER CONSERVATION - Described herein are power conservation systems and methods that reduce power consumption for an electronics device including a liquid crystal display (LCD). The LCD includes a backlight that offers multiple luminance levels, where each level consumes a different amount of power. The systems and methods alter video information while the backlight remains at a backlight luminance level. The alteration reduces luminance for the video information to produce new video information that can be presented at a lower backlight luminance level. Change to the lower backlight luminance level may then occur without significantly affecting aggregate luminance of the new video information, as perceived by a user. The LCD and electronics device consume less power at the lower luminance level.06-10-2010
20100164937METHOD AND DEVICE FOR CONTROLLING POWER OF ACTIVE MATRIX ORGANIC LIGHT-EMITTING DIODE - A method and device for controlling power of an active matrix organic light-emitting diode are provided. The method for controlling power of an active matrix organic light-emitting diode includes: calculating a frame data rate, which is a ratio of a light emitting pixel quantity representing a specific color in an image data to be displayed; determining a luminance reducing amount mapped to the frame data rate; and controlling and displaying an entire luminance of an image according to the luminance reducing amount.07-01-2010
20110063276Methods, Systems, Devices and Components for Reducing Power Consumption in an LCD Backlit by LEDs - Disclosed are various embodiments of methods, systems, devices and components nets for reducing power consumption in an LCD display that is backlit by LEDs. The various embodiments typically require the use of an array of backlighting LEDs 03-17-2011
20100149164Display device, display data processing device, and display data processing method - A display device includes: an extraction unit extracting an edge component of a display data signal; an adder unit adding an edge component to the display data signal; a signal generation unit generating a control signal in accordance with the display data signal and an output signal of the adder unit; a correction unit carrying out correction processing on the edge component in accordance with the control signal and outputting the corrected edge component to the adder unit; and a display unit carrying out a display operation in accordance with the output signal of the adder unit.06-17-2010
20110128278REGULATING CIRCUIT - A regulating circuit for driving a display screen pixel having a light-emitting diode includes at least one operational amplifier (06-02-2011
20090219275DC-DC CONVERTER AND ORGANIC LIGHT EMITTING DISPLAY USING THE SAME - A DC-DC converter is provided including a switch unit, a coil, and a controller. The switch unit is coupled to an input power supply and is configured to transmit or not to transmit input power from the input power supply in accordance with a switching signal. The coil has a first terminal for receiving current output from the switch unit and a second terminal. The controller is coupled to the coil and is configured to operate or not to operate in accordance with an enable signal. The controller is configured to change a flow of current through the coil such that the second terminal of the coil is at a higher voltage than the first terminal of the coil.09-03-2009
20110084957PLASMA DISPLAY PANEL DRIVE CIRCUIT AND PLASMA DISPLAY DEVICE - A plasma display panel drive circuit assures a sufficient number of subfields in a high resolution panel, is low cost, and is resistant to producing brightness differences. The plasma display panel drive circuit segments plural sustain electrodes into a first sustain electrode group and second sustain electrode group, applies sustain pulses in the sustain period, and includes the following devices: a sustain pulse generating circuit that generates sustain pulses; a specific voltage application circuit that applies a specific voltage to a first electrode path to the first sustain electrode group, and a second electrode path to the second sustain electrode group, at respective specific times; and a separation switch circuit that is connected between the sustain pulse generating circuit and the first electrode path and second electrode path, and electrically isolates the sustain pulse generating circuit from either the first electrode path or the second electrode path.04-14-2011
20110084954ORGANIC LIGHT EMITTING DISPLAY DEVICE AND DRIVING METHOD FOR THE SAME - An organic light emitting display device that includes: a pixel unit that displays an image by receiving a data signal, a scan signal, a first pixel power, and a second pixel power; a regulator that receives first input voltage from the outside and boosts the received first input voltage to generate the first pixel power and inverts the received first input voltage to generate second pixel power; a driver driving unit that includes a power generator and a signal generator generating the data signal and the scan signal. Further, a switching unit that selectively connects the pixel unit with the regulator or the pixel unit with the driver driving unit; and a control unit that transmits the first pixel power and the second pixel power generated by the regulator or the driver driving unit to the pixel unit.04-14-2011
20110084953ORGANIC LIGHT EMITTING DISPLAY HAVING A POWER SAVING MECHANISM - An organic light emitting display having a power saving mechanism includes a first power module for generating a first power voltage, a second power module for generating a second power voltage, a gate driving circuit for generating a scan signal, a data driving circuit for generating a data signal, a pixel circuit, a ripple detection unit and a processing unit. The ripple detection unit detects the ripple of the first power voltage for generating a detection voltage. The processing unit generates a power-saving control signal according to the detection voltage. The pixel circuit employs the scan and data signals to control a light-emitting driving operation based on the voltage difference between the first and second power voltages. When the power-saving control signal is greater than a threshold, the first power module adjusts the first power voltage for reducing the voltage difference so as to save power consumption.04-14-2011
20110084956LIQUID CRYSTAL DISPLAY DEVICE - Disclosed is a LCD device that includes a liquid crystal panel; a driving circuit including data and gate drivers, a timing controller to control the data and gate drivers, and a first power supplier to apply a first driving voltage to the data and gate drivers and the timing controller; a backlight unit disposed at the rear of the liquid crystal panel and including an LED array provided with a plurality of LEDs, an LED driver to apply driving signals to the LED array, and a second power supplier to apply a second driving voltage to the LED driver; and a printed circuit board connected to one edge of the liquid crystal panel and defined into first and second domains which are combined with each other.04-14-2011
20110084955ORGANIC LIGHT EMITTING DISPLAY - An organic light emitting display is capable of displaying an image with desired brightness regardless of the deterioration of organic light emitting diodes (OLED) and the voltage reduction of a first power source. The organic light emitting display includes pixels positioned at crossing regions of scan lines, emission control lines, sensing lines, and data lines, a sensor for extracting information from the pixels on deterioration of organic light emitting diodes (OLEDs) and information on threshold voltages and mobilities of transistors of the pixels, a converter for changing supplied data to generate corrected data using the information on the deterioration of the OLEDs and the information on the threshold voltages and mobilities of the driving transistors, and a data driver for generating data signals to be supplied to the data lines using the corrected data.04-14-2011
20100013818ELECTRONIC PAPER DISPLAY, SEMICONDUCTOR INTEGRATED CIRCUIT AND OPERATING METHOD FOR SEMICONDUCTOR INTEGRATED CIRCUIT - The present invention is directed to reduce power consumption in a standby operation period as a period of holding display in a no-power state. An electronic paper display has an electronic paper display panel, a display driver/controller, a battery, and a booster power source circuit. The display panel can display data by writing display data and, after that, can hold the display in a no-power state. The booster power source circuit generates a boosted power source voltage by an operation of boosting power source voltage from the battery, and the display driver/controller executes the writing of the displayed data to the display panel by using the boosted power source voltage. In the following standby operation period in which the display panel holds the display in the no-power state, the boosting operation of the booster power source circuit is stopped.01-21-2010
20100039422DISPLAY APPARATUS AND DRIVE CONTROL METHOD FOR THE SAME - Supplying first and second measuring voltages to a source terminal of a drive transistor to obtain first and second voltage variations at the source terminal of the drive transistor when a parasitic capacitance of a light emitting element is charged by currents flowed through the drive transistor by the supply of the voltages, obtaining first and second current values of the drive current of the drive transistor based on the first and second voltage variations, obtaining characteristic values of the drive transistor based on the first and second measuring voltages and the first and second current values, and outputting a data signal based on the obtained characteristic values and a drive voltage of the drive transistor corresponding to the amount of emission of the light emitting element to the source terminal of the drive transistor.02-18-2010
20100039421DRIVING METHOD FOR ORGANIC ELECTROLUMINESCENCE LIGHT EMITTING SECTION - A driving method for an organic EL light emitting section is provided which achieves optimization of a mobility correction process for a transistor of a driving circuit in response to luminance. In a driving method for an organic EL light emitting section wherein a driving circuit 02-18-2010
20120242646DISPLAY PANEL, LIQUID CRYSTAL DISPLAY, AND DRIVING METHOD - A display panel includes: a gate driver (09-27-2012
20120242643DISPLAY DEVICE AND METHOD OF CONTROLLING THE SAME - The display device according to the present invention includes: a luminescence element, a capacitor, a drive transistor, a reference power source line, a first switching transistor, a data line, a second switching transistor which switches between conduction and non-conduction between the data line and a second electrode of the capacitor, a reset line, a scanning line, and a scanning line drive circuit. The scanning line drive circuit turns ON the first switching transistor so that reference voltage is supplied to the gate electrode of the drive transistor, and turns ON the second switching transistor in a period in which the first switching element is ON so that a predetermined reset voltage is applied from the data line to a connection point between a first electrode of the luminescence element and a source electrode of the drive transistor.09-27-2012
20100060624DISPLAY UNIT, DISPLAY UNIT DRIVING METHOD AND DISPLAY SYSTEM - A display unit including a capacitor, a pixel and a switch is provided. The capacitor is charged or discharged in response to a voltage difference between a drain control signal and a common voltage signal. The pixel displays in response to the voltage difference between the drain control signal and the common voltage signal. The switch is turned on according to a switch control signal and transmits a source control signal through the third terminal to the pixel and the capacitor. The switch is turned on twice within every one frame according to the switch control signal, and when the switch is turned on for the first time, the pixel displays, and when the switch is turned on for the second time, the capacitor is discharged to avoid a voltage at the third terminal of the switch to exceed a predetermined voltage.03-11-2010
20100128017PLASMA DISPLAY DEVICE - An image signal processing circuit of a plasma display device includes an image data replacement circuit for replacing image data for a predetermined subfield with image data having less power consumption in a data electrode drive circuit; a power calculating circuit for calculating power consumption in the data electrode drive circuit and outputting power consumption for each field as field power; a power predicting circuit for predicting the field power when the number of predetermined subfields is decreased and outputting it as predicted field power; and an SF determination circuit. The SF determination circuit increases the number of predetermined subfields when the field power is not less than a predetermined power threshold, and decreases the number of predetermined subfields when the field power is less than the predetermined power threshold and the predicted field power is less than the predetermined power threshold.05-27-2010
20110069058PIXEL CIRCUIT OF DISPLAY PANEL, METHOD OF CONTROLLING THE PIXEL CIRCUIT, AND ORGANIC LIGHT EMITTING DISPLAY INCLUDING THE DISPLAY PANEL - A pixel circuit of a display panel, a method of driving the pixel circuit, and an organic light emitting display device including the display panel are provided. All of a plurality of transistors used in the pixel circuit are NMOS transistors, and the pixel circuit is configured to compensate for a voltage change at a source electrode of a driving transistor during light emission.03-24-2011
20110074763LIQUID CRYSTAL DISPLAY POWER SUPPLYING CIRCUIT - A liquid crystal display (LCD) power supplying circuit includes a motherboard switch circuit, an LCD power circuit, a power switch circuit, and a first power supplying unit. An input terminal of the motherboard switch circuit is coupled to a power output terminal of a motherboard. An input terminal of the power switch circuit is coupled to the LCD power circuit. The first power supplying unit is coupled to an output terminal of the motherboard switch circuit, an output terminal of the power switch circuit and a microprocessor, and the first power supplying unit supplies power from the motherboard or power from the LCD power circuit to the microprocessor.03-31-2011
20110074764LIQUID-CRYSTAL DRIVING METHOD AND DEVICE - A liquid-crystal driving method includes: setting a reset line, a writing line, and a non-select line in a direction parallel to a plurality of common electrodes, the plurality of the common electrodes and a plurality of segment electrodes being arranged in a matrix form; dividing a driving period into a reset period and a write period; applying a first voltage during the reset period spanning n lines before writing data into the writing line by one of the plurality segment electrodes during the write period, where n is a positive integer; applying a second voltage during the reset period spanning m lines and the write period, where m is a positive integer; and driving a liquid-crystal pixel provided at each intersection of the common electrodes and the segment electrodes.03-31-2011
20090027374Display device - To implement brightness change of pixels due to variations in environmental temperatures with low electric power, the display device includes a display part having a display area arrayed with plural pixels, a display scanning circuit and a signal driving circuit for driving the plural pixels, and a power circuit that supplies a current for illuminating each of the plural pixels with brightness corresponding to a display signal from the signal driving circuit; and a detection unit that includes: a monitor element for driving a constant current that detects environmental temperatures; and plural constant current sources, detects a voltage value relating to the luminous intensity of the pixels by the monitor element to generate a signal to control an output voltage of the power circuit, and changes over a constant current source of the monitor element according to a voltage value detected in the detection unit.01-29-2009
20090027373DISPLAY AND DRIVING CONTROL METHOD THEREFOR - A display and a driving control method for the display are provided. The display includes a display panel, a driving control module and a power-saving control module. The display panel is configured to display a plurality of frames. The driving control module is coupled to the display panel for providing a driving signal of each frame to the display panel. The power saving control module is coupled to the driving control module. The displaying period of each frame includes a first period and a second period. During the first period, the display enters a displaying mode. During the second period, the power-saving control module adjusts the operating parameters of the driving control module such that the display enters a power-saving mode. As a result, the power consumption of the display can be reduced.01-29-2009
20110069059REGULATOR AND ORGANIC LIGHT EMITTING DIODE DISPLAY USING THE SAME - A regulator and an organic light emitting diode display including the regulator are disclosed. The regulator includes a reference voltage generating unit generating a reference voltage from an input voltage, a voltage division resistor circuit dividing a voltage of an output terminal of the regulator to generate a feedback voltage, a comparator comparing the reference voltage with the feedback voltage, a transistor that is turned on or off based on an output of the comparator and switches on or off the input voltage supplied to the output terminal, and a sink current breaking circuit for discharging a sink current flowing in the output terminal to a ground level voltage source.03-24-2011
20110043510POWER SUPPLY FOR LIQUID CRYSTAL DISPLAY - The invention relates to a power supply for a liquid crystal display using a light emitting diode for a backlight unit, and more particularly, to a power supply combining a DC power supply outside the liquid crystal display with a driving power supply inside the liquid crystal display into a single power supply. The power supply for a liquid crystal display according to an aspect of the invention may include: a power conversion section converting commercial AC power into at least one operating power having a predetermined voltage level through a switching operation; a backlight driving section switching the operating power from the power conversion section into backlight driving power; and a power switching control section controlling the switching operation of the power conversion section on the basis of a first feedback signal having a voltage level of the operating power from the power conversion section and a second feedback signal having a voltage level of the backlight driving power from the backlight driving section, wherein the power conversion section, the backlight driving section and the power switching control section are mounted on a single printed circuit board.02-24-2011
20110248983METHOD AND APPARATUS FOR OPERATING PROJECTION MODE IN PROJECTION DEVICE - A projection device capable of automatically controlling on/off of a projection module for projecting display data onto an exterior surface according to an open/closed state of a cover of the projection module, and an operation method thereof are provided. The method for operating a projection module in a projection device includes turning-on the projection module when a first detection signal is detected, wherein the first detection signal is generated when a cover of the projection module is open, and after the projection module is turned on, turning-off the projection module when a second detection signal is detected, wherein the second detection signal is generated when a cover of the projection module is closed.10-13-2011
20100295840LIQUID CRYSTAL DISPLAY APPARATUS AND BACKLIGHT DEVICE - When a power supply switch is turned on, a signal generation circuit generates a starting video signal for an all-white display for a given period of time. A selector outputs the starting video signal generated by the signal generation circuit to a liquid crystal display panel drive circuit. This causes the all-white display to be performed on a screen of a liquid crystal display panel for the given period of time. A lighting voltage is applied to a fluorescent lamp of a backlight unit by an inverter power supply circuit at a given timing in the given period of time.11-25-2010
20110210955GATE DRIVER AND RELATED DRIVING METHOD FOR LIQUID CRYSTAL DISPLAY - The invention provides a gate driver for a liquid crystal display. The gate driver includes a first shift register for sequentially generating a plurality of first scan signals according to a synchronization start signal and a clock signal, an enable control unit for generating an enable signal according to the plurality of first scan signals, a second shift register for generating a plurality of second scan signals sequentially according to the synchronization start signal, the clock signal, and the enable signal, a level shifter for generating a plurality of first output signals and a plurality of second output signals, a logic processing unit for selectively perform logic on the plurality of first output signals and the plurality of second output signals to generate a plurality of gate driving signals, and an output stage for outputting the plurality of gate driving signals.09-01-2011
20100097365LIQUID CRYSTAL DISPLAY DEVICE AND CONTROL METHOD THEREOF - The present invention discloses a liquid crystal display device and a control method thereof. In the present invention, a clock controller detects an external clock signal and outputs a switching signal according to the external clock signal. According the information carried by the switching signal, a shutoff switching circuit controls a gamma voltage generator and a common voltage circuit to output voltages making a pixel electrode and a common electrode have a zero voltage difference. Thereby, the pixel charges are completely released after system shutoff, and the shutoff retained images are instantly eliminated.04-22-2010
20110210956CURRENT SENSOR FOR A SEMICONDUCTOR DEVICE AND SYSTEM - A current sensor which can be used to measure current flowing through a semiconductor substrate of a direct current (DC) to DC converter or other device. The current sensor can provide continuous measurements during operation of the DC to DC converter. In one embodiment, a first current sensor can be use to measure current flow through a high side transistor and a second current sensor can be used to measure current flow through a low side transistor. In another embodiment, a single current sensor can be used to measure current flow through a semiconductor substrate whether the high side transistor is on or off, the low side transistor is on or off, or during switching of either the high side transistor or low side transistor.09-01-2011
20110210957DISPLAY DEVICE AND DRIVING METHOD THEREOF - In a still image display mode, a driving signal and power supply voltage are supplied to a first driver circuit and a driving signal and power supply voltage are supplied to a second driver circuit, and an image signal is output to n pixels. After that, at least the supply of the driving signal and the power supply voltage to the second driver circuit is stopped and an image of the pixel portion based on the image signal is held as a still image. A series of these operations is performed N (N is a natural number) times. In the case where N is 2 or more, stopping the supply of the driving signal and the power supply voltage to the second driver circuit in a K-th (K is a natural number, 2≦K≦N) period is set longer than that in a (K−1)-th period.09-01-2011
20100079440DRIVER FOR IMAGE DISPLAY MEDIUM, IMAGE DISPLAY DEVICE, METHOD FOR INITIALIZING IMAGE DISPLAY MEDIUM, COMPUTER-READABLE MEDIUM AND COMPUTER DATA SIGNAL - There is provided a method for initializing an image display medium. The image display medium includes a pair of substrates, a common electrode, pixel electrodes that are arranged for respective pixels constituting rows and columns on the other substrate, a display layer in which groups of moving particles that move between the substrates in accordance with an electric field are dispersed in a dispersion medium enclosed between the substrates, and transistors that are connected to the pixel electrodes, respectively. Each transistor controls a voltage to be applied to the corresponding pixel. The method includes a first procedure of applying voltages to the source electrodes of the transistors of all the pixels collectively, and a second procedure of applying voltages to the gate electrodes of the transistors of all the pixels collectively while continuing the applying of the voltages in the first procedure.04-01-2010
20110148847METHOD OF DRIVING DISPLAY APPARATUS - The display apparatus includes a light emitting element, a transistor that determines a current supplied from a power supply line to the light emitting element depending on a gate voltage of the transistor, a capacitor that holds the gate voltage of the transistor, a first circuit unit configured to allow the capacitor to hold a voltage of a data line, and a switch operable to cut off the current. The display apparatus further includes a second circuit unit that operates such that when a change occurs in voltage across the light emitting element as a result of turning off the current, a voltage proportional to the difference in the voltage across the light emitting element with respect to the voltage obtained before the current was cut off is added to the voltage held in the capacitor, and a resultant voltage is applied to the gate of the transistor.06-23-2011
20100265242POWER CIRCUIT AND DISPLAY DEVICE USING SAME - A power circuit includes a coil that charges an electric charge of an input voltage, a switch device that controls charging and discharging of the coil, a diode that rectifies the flow of the electric charge from the coil, a capacitor that stabilizes an output voltage when the switch device is turned on, and a driving circuit that controls ON and OFF states of the switch device. The power circuit alternately switches the ON and OFF states of the switch device to control charging and discharging of the coil and the capacitor, and generates and supplies an output voltage higher than the input voltage, and the driving circuit controls the off-period of the switch device according to the on-period of the switch device and the voltage ratio of the output voltage and the input voltage while changing the repetition period of the ON and OFF states of the switch device.10-21-2010
20090244051Self light emitting type display device - The present invention is to provide a display device which efficiently drives light emitting display pixels and which can restrain an excessive increment of an operational voltage outputted from a power supply circuit due to trouble of the circuit or the like. Treating light emitting elements 10-01-2009
20110254828FAMILY OF CURRENT/POWER-EFFICIENT HIGH VOLTAGE LINEAR REGULATOR CIRCUIT ARCHITECTURES - Power efficient power supply regulator circuits are disclosed. The circuits are configured to modify their overhead current according to current load. This is particularly advantageous for use in display devices with widely varying current loads. Such displays include bi-stable displays, such as interferometric modulation displays, LCD displays, and DMD displays.10-20-2011
20120169704ORGANIC LIGHT EMITTING DISPLAY AND DRIVING METHOD THEREOF - An organic light emitting diode (OLED) display is disclosed. According to one aspect, the OLED display includes pixels including an OLED and a driving transistor for supplying a driving current according to an image data signal to the OLED. The display includes a sensor configured to sense a first current flowing to the driving transistor corresponding to a source data input signal. An operation voltage of a saturation region of the driving transistor is measured based on performance information of the OLED by using the same current amount as the first current. A voltage controller is configured to determine a minimum electroluminescence voltage for driving the pixels based on information received from the sensor. A power supply is configured to control a power source voltage applied to the pixels according to the determined electroluminescence voltage, and supply the determined power source voltage.07-05-2012
20120200555ORGANIC ELECTROLUMINESCENCE DISPLAY AND ELECTRONIC EQUIPMENT - An organic electroluminescence display has a bottom emission structure in which a white organic electroluminescence element adapted to emit white light is formed, pixel by pixel, on a substrate, and in which light emitted by the white organic electroluminescence element is extracted from a rear side of the substrate. The organic electroluminescence display includes: a color filter used in combination with the white organic electroluminescence element to extract light of different colors; and metal interconnects formed, pixel by pixel, in such a manner as to surround a light-emitting section of the white organic electroluminescence element and the color filter.08-09-2012
20110254825LIQUID CRYSTAL DISPLAY AND METHOD FOR DRIVING SAME - An LCD includes a liquid crystal panel having a plurality of pixel units each including a liquid crystal capacitor, a scanning circuit for providing scanning signals to the pixel units, a data circuit for providing gray-scale voltage signals to the pixel units; and a timing controller for receiving at least one timing signal and providing a timing control signal to control a driving timing of the scanning circuit and the data circuit according to at least one timing signal. The timing controller outputs a reset control signal to the scanning circuit upon detecting that the liquid crystal display enters a power-off state based on the at least one timing signal. The reset control signal directs the scanning signal to activate all the pixel units to discharge liquid crystal capacitors. A method for driving a liquid crystal display is also provided.10-20-2011
20110254826DISPLAY DEVICE, DRIVING METHOD THEREOF, AND ELECTRONIC APPLIANCE - A driving method of a display device comprising a display area including a plurality of pixels arranged in a matrix, comprising a first step and a second step. In the first step, a first signal is input to each of the plurality of pixels and a first image is displayed on the display area. In the second step, a second signal is input to each of the plurality of pixels; an afterimage that appears on the display area in the first step is erased; a second image is displayed on the display area. The second step is performed after the first step.10-20-2011
20110254824ELECTRONIC DEVICE WITH DUAL DISPLAY SCREENS - An electronic device includes a liquid crystal display (LCD) screen, an electronic paper display (EPD) screen, storage, a switch module, and a CPU. The LCD screen is configured to display a primary user interface when the electronic device powers on. The EPD screen is configured to display predefined content stored in the storage set when the electronic device powers off. The switch module is configured to power the electronic device on or off in response to user input, and generate a corresponding control signal. The CPU is configured to register the control signal send by the switch module. When the control signal is the power off signal, the CPU directs the EPD screen to display the predefined content.10-20-2011
20100020059ORGANIC LIGHT EMITTING DISPLAY DEVICE - An organic light emitting display device capable of ensuring the drive stability. The organic light emitting display includes a plurality of pixels; first signal supply lines respectively coupled to the pixels disposed in at least two horizontal lines; and second signal supply lines being lower in number than the first signal supply lines and respectively coupled to the pixels disposed in the horizontal lines includes a scan driver driving the first and second signal supply lines; a data driver driving data lines disposed in a direction that is crossed to the first and second signal supply lines; and a dummy pattern block providing dummy patterns so that loads of the second signal supply lines are identical to loads of the first signal supply lines.01-28-2010
20120200558LCD DEVICE - An object of the present invention is to eliminate luminance unevenness due to gradation variation occurring in a plane of a division driven LCD panel. An LCD device (08-09-2012
20120200556ELECTROOPTIC DEVICE, METHOD FOR CONTROLLING ELECTROOPTIC DEVICE, AND ELECTRONIC APPARATUS - In writing performed at a start pulse DY08-09-2012
20100321374Method and apparatus for reducing driver energy consumption - Method and apparatus for reducing driver energy consumption of drivers of a display device each supplied by an input codeword as e.g. for data drivers of a plasma display panel supplied by sequences of subfield data bits in form of a codeword comprising a predetermined number of bits are recommended, wherein the apparatus comprises a driver transition energy limitation circuit for toggling bits of the input codeword applied to the driver transition energy limitation circuit and providing a codeword reducing the driver energy consumption. A toggle map, which is generated from a combination of a transition map determining a bit in the input codeword if toggled reduces energy consumption and a flag map determining a number of least significant bits exceeding a cell energy limit value, is applied to an input codeword for the driver to toggle bits of said input codeword for reducing driver energy consumption without a perceivable image quality degradation. Method and apparatus are advantageously applicable for driver overheat protection and eco mode to reduce driver energy consumption without a perceivable image quality degradation.12-23-2010
20100321372DISPLAY DEVICE AND METHOD FOR DRIVING DISPLAY - Each stage of first and second shift registers outputs a scan pulse by transferring a clock pulse of a clock signal supplied through a first clock input terminal. A first transistor is provided in at least one embodiment so as to connect and disconnect a scan signal line corresponding to the individual stage to and from a low-level power source of the scan pulse, and the first transistor has a gate that receives a clock signal supplied through a second clock input terminal. Two clock signals supplied to the first shift register and two clock signals supplied to the second shift register are different from each other in timings of their clock pulses. This realizes a display device capable of curbing the phenomenon in which a threshold voltage of a sink-down transistor is shifted, while sinking the gate line voltage down.12-23-2010
20100321373IMAGE DISPLAY APPARATUS AND METHOD FOR CONTROLLING THE SAME - In a method for controlling an image display apparatus provided with a display panel including electron emitting devices connected to scan wirings and modulation wirings and light emitting members for emitting light by irradiation with electrons, a modulation voltage pulse is generated such that its pulse width becomes longer than that of a scan voltage pulse, and the modulation voltage pulse is started to be output before start of output of the scan voltage pulse whereas it is ended after end of the output of the scan voltage pulse.12-23-2010
20100321371METHOD OF DRIVING PLASMA DISPLAY PANEL, AND PLASMA DISPLAY APPARATUS - A method of driving a plasma display panel of the present invention, is a driving method of a display panel including plural display electrode pairs (12-23-2010
20100321370Display system and source driver thereof - A source driver includes a gamma voltage generator, in which the gamma voltage generator includes a first gamma resistor string and a second gamma resistor string. The first gamma resistor string receives a first gamma reference voltage and generates a plurality of first gamma voltages. The second gamma resistor string receives a second gamma reference voltage and generates a plurality of second gamma voltages, in which the second gamma voltages have different voltage values from the first gamma voltages. The switch circuit selects the first gamma voltages or the second gamma voltages as output gamma voltages according to a timing control signal. The digital to analog converter selects one of the output gamma voltages as a driving voltage corresponding to a received digital pixel data for driving a first pixel region or a second pixel region of the sub-pixel.12-23-2010
20110164024IMAGE DISPLAY DEVICE AND METHOD OF CONTROLLING THE SAME - An image display device includes a driver having a gate connected to a first electrode of a first capacitor and a source connected to an anode of a luminescence element. A second capacitor is connected to a second electrode of the first capacitor. A first switch supplies a reference voltage to the first electrode of the first capacitor. A second switch supplies a signal voltage to the second electrode of the first capacitor. A third switch connects the anode of the luminescence element to the second capacitor. A method of controlling the image display device includes: supplying the signal voltage to the first capacitor by switching ON the first and second switches when the third switch is OFF; switching OFF the first and second switches to turn ON the third switch after the first capacitor holds a capacitor voltage; and causing the second capacitor to hold a source potential of the driver while the third switch is ON.07-07-2011
20110164023ORGANIC LIGHT EMITTING DIODE DISPLAY - An organic light emitting diode (OLED) display includes: a display panel including a display area having an organic light emitting element for emitting light and a plurality of peripheral areas neighboring the display area; a driver corresponding to one of the plurality of peripheral areas and supplying driving power to the organic light emitting element; a plurality of power transferring units respectively corresponding to the plurality of peripheral areas thereby being respectively connected to the display panel and receiving the driving power from the driver thereby supplying the driving power to the organic light emitting element; and a power connecting unit connecting between the driver and the power transferring unit and at least one power connecting unit between the neighboring power transferring units among the plurality of power transferring units and transmitting the driving power from the driver to the power transferring unit.07-07-2011
20110164022Common Voltage Driving Circuit for High-Resolution TFT-LCD - A common voltage driving circuit configured to output a common voltage to high-resolution TFT-LCD is provided. The common voltage driving circuit includes: a first pad coupled to a common electrode loading of an LCD for sensing a common voltage of the common electrode loading; a second pad coupled to the common electrode loading; a first amplifying device receiving a high level voltage and the sensed common voltage of the common electrode loading for generating a first overdrive voltage to the second pad thereby improving transient response of the common voltage with high level; and a second amplifying device receiving a low voltage level voltage and the sensed common voltage of the common electrode loading for generating a second overdrive voltage to the second pad thereby improving transient response of the common voltage with low level.07-07-2011
20110134102LIQUID CRYSTAL DISPLAY - A liquid crystal display includes a liquid crystal display panel on which gate lines and data lines cross one another and liquid crystal cells are respectively arranged at crossings of the gate lines and the data lines in a matrix form, a panel common line connected to common electrodes of the liquid crystal cells, a power supply circuit generating a common voltage to be applied to the common electrodes, data circuit groups each including a data driver integrated circuit (IC) for driving the data lines, and gate circuit groups each including a gate driver IC for driving the gate lines. The gate circuit groups is connected to one of the plurality of data circuit groups through a first line-on-glass (LOG) type signal line group.06-09-2011
20110134105METHOD OF DRIVING PLASMA DISPLAY PANEL, AND PLASMA DISPLAY APPARATUS - In a driving method of a plasma display panel of the present invention, plural display electrode pairs are divided into plural display electrode pair groups and one field is divided into plural sub-fields. The length of the sustain period is compared to the length of the erase period. If the sustain period is longer than the erase period, sustain discharge and erase discharge are performed for each of the display electrode pair groups, while if the sustain period is shorter than the erase period, sustain discharge and erase discharge of one display electrode pair group are synchronized with those of another display electrode pair group. For a sub-field with a largest luminance weight or a sub-field with a highest lighting ratio, sustain discharge and erase discharge of one display electrode pair group are synchronized with those of another display electrode pair group without fail.06-09-2011
20110134104LIQUID CRYSTAL DISPLAY DEVICE WITH GATE-IN-PANEL STRUCTURE - An LCD device with a GIP structure is disclosed. The LCD device includes: a liquid crystal display panel with an active area used to display images; a gate driving circuit formed on a side edge of the liquid crystal display panel and configured to apply scan signals to the active area; a start pulse line configured to transfer a start pulse to the gate driving circuit; and a static electricity preventer disposed on the start pulse line adjacent to the gate driving circuit and configured to prevent static electricity from being induced in the start pulse line.06-09-2011
20110134101Display device, method of driving the display device, and electronic device - A display device that may be controlled to be reduced in power consumption, a method of driving the display device, and an electronic device having the display device are provided. The display device includes: a display section including a display region in which a plurality of display pixels are arranged two-dimensionally, the display pixels having first light emitting elements, and a non-display region in which one or multiple adjustment pixels are arranged, each adjustment pixel having a second light emitting element; and a drive section driving each display pixel based on a video signal, and driving the adjustment pixel based on a fixed signal. The drive section applies a power-supply voltage, having a value corresponding to voltage variation in the second light emitting element when the second light emitting element emits light, to each display pixel.06-09-2011
20100225634ELECTROLUMINESCENT DISPLAY COMPENSATED DRIVE SIGNAL - Subpixels on an electroluminescent (EL) display panel, such as an organic light-emitting diode (OLED) panel, are compensated for initial nonuniformity (“mura”) and for aging effects such as threshold voltage V09-09-2010
20110261045IMAGE REPRODUCING DEVICE, IMAGE RECORDING/REPRODUCING DEVICE, IMAGE REPRODUCING METHOD, AND IMAGE RECORDING/REPRODUCING METHOD. - An objective of the present invention is to provide an image reproducing device in which energy saving characteristics and responsiveness are balanced. An image reproducing device according to this invention includes an operation-state-information acquisition unit for obtaining operation-state information of a display device for displaying the reproduced image signal, an operation input unit for inputting an operation command to operate the image reproducing device, and a mode setting unit for setting a mode for supplying electric power to the image reproducing device according to the operation-state information.10-27-2011
20120206432INVERTER AND ORGANIC LIGHT EMITTING DISPLAY USING THE SAME - An inverter is capable of improving the reliability of driving. The inverter includes a first transistor coupled between a first power source and an output terminal of the inverter and having a gate electrode coupled to a first input terminal of the inverter, a second transistor coupled between a second power source and the output terminal, and having a gate electrode coupled to a second input terminal of the inverter, a first capacitor coupled between the gate electrode of the first transistor and the first input terminal, a second capacitor coupled between the gate electrode of the second transistor and the second input terminal, a third transistor coupled between the gate electrode of the first transistor and a reset power source, and a fourth transistor coupled between the gate electrode of the second transistor and the reset power source.08-16-2012
20110164025DISPLAY DEVICE AND METHOD OF DRIVING THE SAME - [Problem] By improving the accuracy of compensation for a threshold voltage shift of a driving transistor that controls a current supplied to a current-driven type self light-emitting element, excellent display performance is maintained over an extended period of time.07-07-2011
20110080396DRIVING METHOD FOR REDUCING IMAGE STICKING - A driving method with reducing image sticking effect is disclosed. The driving method includes applying a voltage on the data lines for trapping impurities crossing the data lines and lowering the degree of the image sticking effect, and applying different asymmetric waveforms to different data lines for trapping impurities crossing the data lines and lowering the degree of the image sticking effect.04-07-2011
20110096064LIQUID CRYSTAL DISPLAY AND METHOD FOR DRIVING SAME - A liquid crystal display includes a liquid crystal panel having a plurality of pixel units, a scanning driver configured to provide scanning signals to scan the pixel units, a data driver configured to provide data voltage signals to the pixel electrode of the pixel units; and a common voltage driver configured to provide a common voltage signal to the common electrodes of the pixel units. Each pixel unit includes a pixel electrode and a common electrode, and the pixel units cooperatively display picture frame by frame. A dummy cycle period is defined between two sequent normal frame periods. The common voltage signal is an alternating current voltage signal in each normal frame period, and a polarity of the common voltage signal is fixed in the dummy cycle. A method for driving a liquid crystal display is also provided.04-28-2011
20110096066Active Matrix Displays - An active matrix OLED display (04-28-2011
20110096060PLASMA DISPLAY DEVICE - A plasma display device is provided which includes: a first common electrode (Xi) that is supplied with a constant voltage in a display discharge period; a first scan electrode (Yi) that is provided in parallel to the first common electrode and supplied with a display discharge pulse in the display discharge period to perform display discharge between the first scan electrode and the first common electrode; and a first address electrode (Aj) that is provided in a manner to intersect the first common electrode and the first scan electrode, wherein the capacitance (Cax) between the first common electrode and the first address electrode is larger than the capacitance (Cay) between the first scan electrode and the first address electrode.04-28-2011
20110096063DISPLAY APPARATUS AND POWER SUPPLY METHOD THEREOF - There is provided a display apparatus including: a signal receiving unit which receives an image signal; a signal processing unit which processes the image signal; a display unit which displays an image based on the image signal; and a power supply unit which supplies an operational voltage to the display unit. The power supply unit includes: a voltage converting unit which converts a DC voltage to output the operational voltage; a feedback part which outputs a feedback voltage according to the DC voltage; a power factor correcting unit which performs power factor correction based on the feedback voltage output; and a power saving unit which controls the output of the feedback unit according to an operational state of the power factor correcting unit.04-28-2011
20110096065Display apparatus and method for driving the same - A method of driving a display apparatus formed by arranging display devices each having a driving circuit and a current-driven type light emitting portion, the method comprising the steps of: performing a threshold voltage cancelling process in units of a display device row in which a predetermined reference voltage is applied to a gate electrode of a driving transistor of Q×N display devices configuring groups of display device rows and a predetermined driving voltage is applied to one source/drain region of the Q×N display devices so as to change the electric potential of the other source/drain region toward an electric potential calculated by subtracting a threshold voltage of the driving transistor from the reference voltage during a period T04-28-2011
20110157146DISPLAY DRIVER CIRCUIT - In an output mode, an output switch (SW06-30-2011
20110157145LEVEL SHIFT CIRCUIT, SIGNAL DRIVE CIRCUIT, DISPLAY DEVICE, AND ELECTRONIC DEVICE - A level shift circuit includes: a first and a second output transistor outputting voltages derived from a first and a second power source voltage, respectively; a first and a second input transistor outputting, based on a first input pulse signal, a first voltage for turning ON the first output transistor and a second voltage for turning OFF the second output transistor, respectively; a third and a fourth input transistor outputting, based on a second input pulse signal, a third voltage for turning OFF the first output transistor and a fourth voltage for turning ON the second output transistor, respectively; a first bootstrap circuit enlarging an amplitude of the first voltage and supplying the same to the first output transistor; and a first voltage compensation circuit, based on a third input pulse signal, making, at an end timing of the first input pulse signal, a voltage change in a direction opposite to that of a voltage fluctuation caused in the first voltage due to a parasitic capacitance in the first input transistor.06-30-2011
20110157143PIXEL AND ORGANIC LIGHT EMITTING DISPLAY DEVICE USING THE SAME - A pixel capable of displaying images with substantially uniform luminance and an organic light emitting display device using the same are provided. An organic light emitting display device is driven in a frame divided into a reset period, a compensation period and an emission period. The organic light emitting display device includes pixels coupled to scan lines and data lines. First and second control lines are commonly coupled to the pixels. A control line driver supplies first and second control signals to the respective first and second control lines. A scan driver concurrently supplies a scan signal to the scan lines during a time in the reset and compensation periods. A data driver supplies a reset voltage to the data lines during the time in the reset and compensation periods.06-30-2011
20110157141DC-DC CONVERTER AND CONTROLLING METHOD THEREOF, AND DISPLAY DEVICE USING THE SAME - A DC-DC converter comprises a burst mode circuit configured to work when a load connected to an output terminal of the DC-DC converter is a light load, and a PWM mode circuit configured to work when the load is a heavy load, wherein the burst mode circuit switches a voltage at the output terminal during a period of time when a feedback voltage from the output terminal reaches a high potential reference voltage, generates a switch start signal with frequencies divided by predetermined frequency division values, and switches the voltage at the output terminal in response to the switch start signal, and wherein the PWM mode circuit switches the voltage at the output terminal during a period of time when a ramp wave signal is greater than a difference voltage between the feedback voltage and a predetermined PWM mode reference voltage.06-30-2011
20110157140VOLTAGE CONTROL ON N-WELLS IN MULTI-VOLTAGE ENVIRONMENTS - An output pad control logic comprises an output buffer including a plurality of transistors connected to drive signals for an output pad. Each of the plurality of transistors includes an n-well. An n-well generator connects a first voltage to the n-wells of the plurality of transistors of the output buffer in a first mode of operation when a system rail voltage exceeds a pad voltage applied to the output pad. The n-well generator connects the pad voltage to the n-wells of the plurality of transistors of the output buffer in a second mode of operation when the pad voltage applied to the output buffer exceeds the system rail voltage. A switching circuit is responsive to at least one control signal to connect the system rail voltage as the first voltage when the output pad is not driving an LCD display and to connect a larger of the system rail voltage and an LCD drive voltage as the first voltage when the output pad is driving the LCD display.06-30-2011
20100110060SYSTEMS AND METHODS FOR GENERATING REFERENCE VOLTAGES - Systems and methods for generating reference voltages are provided. A representative system comprises a resistor circuit; a first switch coupled between a first end of the resistor circuit and a first power source; a second switch coupled between the first end of the resistor circuit and a second power source; a third switch coupled to a second end of the resistor circuit; a fourth switch coupled to the second end of the resistor circuit; a first resistor coupled between the first end of the resistor circuit and the first switch; a second resistor coupled between the first end of the resistor circuit and the second switch; a third resistor coupled between the second end of the resistor circuit and the third switch; a fourth resistor coupled between the second end of the resistor circuit and the fourth switch; and a control circuit for controlling the switches.05-06-2010
20130009942DISPLAY DEVICE AND DRIVING METHOD THEREOF - In a display device, the anode voltage of an organic light emitting element is periodically reset. The control terminal of a driving transistor is periodically reset, and an input data voltage is connected to the control terminal through an input terminal and an output terminal of the driving transistor. As a result, good control over the displayed luminance is achieved. Other features are also provided.01-10-2013
20130009938DISPLAY DEVICE AND DRIVING METHOD THEREOF - A display device includes a first gate driver that applies a gate-on voltage to gate lines of a first gate line group in each period of n first scan periods for a first frame, n being a natural number. A second gate driver applies a gate-on voltage to gate lines of a second gate line group in each period of n second scan periods for a first frame. A data driver applies a data voltage to a plurality of data lines. A signal controller transmits a control signal to the first and second gate drivers and the data driver, wherein an interval between start points of the n first scan periods is gradually decreased according to time, and an interval between start points of the n second scan periods is gradually increased according to time.01-10-2013
20130009940DISPLAY DEVICE - The occurrence of crosstalk in a display device which performs 3D display is suppressed. When 3D display is performed, part of a plurality of pixels perform desired color display and the other part of the plurality of pixels perform black display. Thus, as compared to the case where all of a plurality of pixels perform desired color display, the occurrence of crosstalk can be suppressed. A plurality of pixels which perform desired color display are changed depending on the display state. Therefore, as compared to the case where a plurality of pixels which perform desired color display are fixed when 3D display is performed, the display device can have a longer period until display change in a pixel becomes obvious (a longer lifetime) and variations in display among the plurality of pixels can be reduced.01-10-2013
20110096062LIQUID CRYSTAL DISPLAY DEVICE, DRIVING DEVICE FOR LIQUID CRYSTAL DISPLAY PANEL, AND LIQUID CRYSTAL DISPLAY PANEL - Pixel electrodes in odd-numbered rows of a liquid crystal display panel are connected to source lines arranged on the left side of the pixel electrodes, respectively. Further, Pixel electrodes in even-numbered rows are connected to source lines arranged on the right side of the pixel electrodes, respectively. A potential setting section outputs potentials higher than a common electrode potential V04-28-2011
20100214278ELECTRONIC DEVICE - To provide an electronic device in which information about an application that is in a non-active state can be displayed during a power saving mode and an operation mode can be changed from the power saving mode to a normal power mode with a pressing operation of a predetermined key. When a plurality of applications are activated and a multi-window is displayed, a mode of a window display area with respect to the application that is in a visible state and in a non-active state is changed to ‘power saving mode 1’ (power saving screen with a character) and after that, it is changed to ‘power saving mode 2’ (complete power saving screen).08-26-2010
20100283777LIQUID CRYSTAL DISPLAY - A liquid crystal display is disclosed. The liquid crystal display includes a liquid crystal display panel on which a plurality of data lines and a plurality of gate lines are positioned to cross one another and a plurality of liquid crystal cells driven according to a voltage difference between a data voltage and a common voltage are positioned in a matrix format, a side printed circuit board (PCB) connected to the side of the liquid crystal display panel, and a DC to DC converter that is mounted on the side PCB to produce a driving voltage of the liquid crystal display panel.11-11-2010
20080218505IMAGE DISPLAY APPARATUS FOR CONTROLLING AN EXTERNAL DATA TRANSMITTING DEVICE USING A USB CONNECTOR AND A METHOD THEREOF - An image display apparatus which controls an external device transmitting data using a USB connector is provided. The image display apparatus includes a first connector and a second connector which receive an image signal, respectively, a display unit which selectively displays the image signal input via the first connector and the second connector, and if the image signal input via the first connector is displayed on the display unit, a central processing unit (CPU) which stops an external device connected via the second connector from transmitting an image signal. Accordingly, resources in the external device can be efficiently managed by stopping unnecessary operations.09-11-2008
20110148848OUTPUT DRIVER OF ELECTRONIC PAPER DISPLAY DEVICE - An output driver of an electronic paper display device includes M number of output driver sections configured to transmit M number of pieces of data, respectively, to the electronic paper display device, wherein the M number of output driver sections are divided into a plurality of groups, and are temporally dispersed and driven according to groups, thereby transmitting the M number of pieces of data to the electronic paper display device. Also, an output driver for transmitting data to an electronic paper display device includes N number of drivers, wherein a part of the N number of drivers are selected and driven according to an output impedance of the electronic paper display device. Since output driver sections are divided into groups and are dispersedly driven, peak current is reduced. Since drivers are selectively driven according to the sizes of output loads, a constant driving capability is provided.06-23-2011
20110148845DRIVING METHOD OF A DISPLAY DEVICE AND DISPLAY DEVICE - A driving method of a display device includes: supplying a first drive voltage from a first circuit, which is driven using a first power-supply voltage from a first power source, and a second drive voltage from a second circuit, which is driven using a second power-supply voltage from a second power source that is lower than the first power-supply voltage; causing a driver circuit section that drives a display element to charge, using the second drive voltage, a display element in a non-selected region in a display element section that includes a plurality of display elements; maintaining a voltage of the display element in the non-selected region, using the second drive voltage.06-23-2011
20110187697DC-DC CONVERTER AND ORGANIC LIGHT EMITTING DISPLAY DEVICE INCLUDING THE SAME - An organic light emitting display device includes a DC-DC converter that is capable of reducing power consumption by increasing efficiency. The DC-DC converter includes: a variable resistor; an oscillator configured to output a frequency control signal having a frequency corresponding to a resistance value of the variable resistor; a booster configured to receive the control signal and to output a first power by switching an input voltage in accordance with the control signal; and an inverter configured to receive the control signal and to generate a second power by switching and inverting the input voltage in accordance with the control signal.08-04-2011
20110187699Pixel circuit, display and driving method thereof - The invention provides a pixel circuit that can cancel the influence of the mobility of a drive transistor. A drive transistor supplies a light-emitting element with an output current dependent upon an input voltage. The light-emitting element emits light with a luminance dependent upon a video signal in response to the output current supplied from the drive transistor. The pixel circuit includes a correction unit that corrects the input voltage held by a capacitive part in order to cancel the dependence of the output current on the carrier mobility.08-04-2011
20110187698POWER CONTROLLING DEVICE AND METHOD FOR VIDEO DISPLAY APPARATUS - If a power-on signal is inputted to a television set in a standby state, a power control unit switches on a first power switch to supply power to the entire modules of the TV, A control unit then displays a menu window so that a user may select a specific function to be set from the menu window. The control unit determines the block that performs the corresponding functions in the memory and switches on a second power switch to supply power to the block performing the corresponding functions. Once the user inputs a power-off signal to the television, the power control unit switches off the first power switch to cut off the power controlled by the control unit. The second power switch maintains the on-state and supplies standby power to the control unit for the functions set by the user to be performed.08-04-2011
20100026676DISPLAY SYSTEM WITH LOW DROP-OUT VOLTAGE REGULATOR - A display system is disclosed in the present invention, which includes a low drop-out voltage regulator (LDO) for receiving an input voltage and providing a stable output voltage. The low drop-out voltage regulator includes a regulating circuit, a first switch, a current source circuit and an inverting circuit. The regulating circuit has a regulating circuit input, a regulating circuit output and a regulating circuit control terminal. The first switch selectively forms short or open circuit in accordance with ON/OFF states thereof. The current source circuit provides a fixed current to the control terminal and the output of the regulating circuit. The inverting circuit has an inverting circuit input coupled to the regulating circuit output and an inverting circuit output terminal coupled to the regulating circuit control terminal, the inverting circuit inverting the output voltage from the regulating circuit output. The regulating circuit control terminal adjusts the output voltage in accordance with a control voltage received thereof.02-04-2010
20090174698PRE-CHARGE SYSTEM FOR ON GLASS LCD DRIVING CIRCUIT - A driving circuit and a method of driving a liquid crystal display having an array of liquid crystal cells connected to a common line, a plurality of gate lines and a plurality of signal lines, each gate line being arranged to selectively enable a respective set of the liquid crystal cells such that signal lines connected to respective liquid crystal cells of a set can be used to charge respective liquid crystal cells of that set when that set is enabled by the respective gate line. The common line is driven with a common signal having selectively one of a first level and a second level. The gate lines are driven so as to selectively enable the respective sets of liquid crystal cells. Liquid crystal cells are charged with video signal levels varying between a minimum level and a maximum level wherein, when the common signal has the first level, the minimum level is the first level and the maximum level is the second level and, when the common signal has the second level, the minimum level is the second level and the maximum level is the first level. At least some of the signal lines are selectively driven with the maximum level and the voltage on the at least some of the signal lines is monitored such that driving of the at least some of the signal lines with the maximum level ceases when the monitored voltage reaches a predetermined target value intermediate the minimum level and the maximum level. A control circuit is configured to pre-charge liquid crystal cells prior to charging those liquid crystal cells according to the video signal levels by driving those liquid crystal cells with the maximum level until the monitored voltage reaches the predetermined target value.07-09-2009
20100020060DISPLAY DEVICE AND CONTROLLING METHOD THEREOF - A conventional setting voltage was a value with an estimated margin of a characteristic change of a light emitting element. Therefore, a voltage between the source and drain of a driver transistor V01-28-2010
20120146988LEVEL SHIFT CIRCUIT AND DRIVER CIRCUIT HAVING THE SAME - A level shift circuit includes first and second NMOS transistors that are coupled between a first supply terminal, and first and second output nodes, respectively, and have respective control terminals receiving input signals of a low amplitude, third and fourth PMOS transistors which are coupled between a second supply terminal, and the first and second output nodes outputting signals of high amplitude, respectively, a fifth PMOS transistor which is coupled between a gate of the third PMOS transistor and the second output node, and has a gate coupled to the first output node, a sixth PMOS transistor which is coupled between a gate of the fourth PMOS transistor and the first output node, and has a gate coupled to the second output node, and first and second load elements which are coupled between the second supply terminal and the gates of the third and fourth PMOS transistors, respectively.06-14-2012
20090201281Active Matrix Display Drive Control Systems - This invention relates to methods, apparatus, and computer program code for driving an active matrix display, in particular an organic light emitting diode (OLED) display, with reduced power consumption.08-13-2009
20120038618CONTROL CIRCUIT OF LIQUID CRYSTAL DISPLAY DEVICE, LIQUID CRYSTAL DISPLAY DEVICE, AND ELECTRONIC DEVICE INCLUDING LIQUID CRYSTAL DISPLAY DEVICE - A current that flows through a common source amplifier circuit provided in a current amplifier circuit of an operational amplifier in displaying a moving image is made to be different from that in displaying a still image. Specifically, in one embodiment of the present invention, current source circuits which are provided in the current amplifier circuit in the operational amplifier operate by switching the current source circuit used for displaying a moving image and the current source circuit used for displaying a still image. The current amplitude in the common source amplifier circuit is controlled by switching the current source circuits, whereby low power consumption in the power supply circuit is achieved. The switching of the current source circuit in the operational amplifier is performed by a display control circuit for controlling a liquid crystal display panel in order to switch moving image display and still image display.02-16-2012
20080273026Separately excited inverter circuit and liquid crystal display television - The present invention discloses a separately excited inverter circuit whose switching circuit having a plurality of switching elements and which is capable of minimizing the damage of other switching elements even if any of the plurality of switching elements is short circuited and damaged. The separately excited inverter circuit includes: a switching circuit of which a full bridge circuit applies an AC voltage to the primary winding of the step-up transformer 11-06-2008
20110115776DC-DC Converter and Organic Light Emitting Display Device Using the Same - A DC-DC converter and an organic light emitting display device using the same. Here, a DC-DC converter is provided with a voltage sensor for sensing a battery voltage outputted from a battery. A regulator receives the battery voltage from the battery. When the battery voltage is a set value or less, the regulator is stopped from bypassing the battery voltage. When the voltage of the inputted power source exceeds the set value, the regulator is driven to lower the battery voltage. When the battery voltage is the set value or less, a controller controls the driving of the regulator. A power generator receives the regulated battery voltage to output a first pixel power source and a second pixel power source.05-19-2011
20120146986SWITCHING POWER SUPPLY AND DISPLAY DEVICE PROVIDED WITH SAME - A switching power supply has a function of improving a power factor, and outputs insulated DC. The switching power supply performs two kinds of controls for switching devices exclusive to each other: controlling of a switching device provided in a direction in which the discharging of a primary-side smoothing capacitor is prohibited at the time of suspension of commercially available AC power and near the zero cross of an input voltage; and causing a switching device provided between the output side of a third winding and the primary-side smoothing capacitor to control a charging current, thereby charging a capacitor in a boosted manner.06-14-2012
20120146985METHOD OF DRIVING DISPLAY PANEL AND DISPLAY APPARATUS FOR PERFORMING THE SAME - A method of driving a display panel includes generating a gate on voltage, generating first and second gate off voltages based on an external voltage in a first operating mode, and first and second gate off voltages based on the gate on voltage in a second operating mode, generating a clock signal based on the gate on voltage and the second gate off voltage and outputting a gate voltage generated based on the clock signal and the first and second gate off voltages to a gate line of the display panel.06-14-2012
20110134103LIQUID CRYSTAL DISPLAY - A liquid crystal display includes according to an embodiment a display panel provided with a plurality of data lines, a plurality of gate lines intersecting the data lines, liquid crystal cells arranged in a matrix, and TFTs disposed at the intersections of the data lines and the gate lines; source drive ICs configured to supply data voltages to the data lines, wherein polarities of data voltages are reversed by a column inversion scheme; and a gate driver configured to sequentially supply gate pulses for the gate lines, wherein polarities of the data voltages charged in the liquid crystal cells in the display panel are reversed in dot unit.06-09-2011
20120306843PIXEL CIRCUIT - A pixel circuit comprises a driving transistor, an electroluminescent unit, a pre-write unit, and a write unit. The electroluminescent unit is controlled by the driving transistor to illuminate in a drive period. The write unit is enabled in a write period recording a data voltage relating to an initial threshold voltage of the electroluminescent unit in first storage element. The pre-write unit is enabled in a pre-write period recording a threshold voltage of the driving transistor and the electroluminescent unit in second storage element. The threshold voltage and the data voltage, stored in the first and the second storage units, are supplied as a gate-source voltage of the driving transistor, so as to provide a compensated drive voltage, capable of compensating the variation of the threshold voltages of the driving transistor and the electroluminescent unit, driving the electroluminescent unit.12-06-2012
20110304605Data Latch Circuit and Electronic Device - The data latch circuit of the invention includes a means for short-circuiting an input terminal and an output terminal of an inverter and by connecting the input terminal to one electrode of a capacitor and sampling a data signal or a reference potential to the other electrode of the capacitor, an accurate operation can be obtained without being influenced by variations in the TFT characteristics even when the amplitude of an input signal is small relatively to the width of a power supply voltage.12-15-2011
20110304604DISPLAY PANEL - A display panel includes a display area including a gate line and a data line, a gate driver integrated on a substrate and connected to one end of the gate line, the gate driver including a plurality of a stage, a signal line connected to the stages; and a blocking member disposed on the signal line and overlapped with the signal line, the blocking member including a plurality of an opening.12-15-2011
20110050676Apparatus for Outputting Gamma Filter Reference Voltage, Display Apparatus, and Method of Driving the Display Apparatus - An apparatus for outputting a gamma filter reference voltage, the apparatus including a gamma filter reference voltage generator that generates a first reference voltage to be applied as a reference voltage to a gamma filter and a plurality of second reference voltages, a temperature sensor that generates temperature information by sensing temperature, and a reference voltage adjustment unit that selects at least one of the plurality of second reference voltages based on the temperature information and applies the selected second reference voltage to the gamma filter.03-03-2011
20120038620DISPLAY DEVICE, METHOD OF DRIVING SAME, AND ELECTRONIC DEVICE - A display device is disclosed. The display device includes: a pixel array portion and a driver portion for driving the pixel array portion. The pixel array portion has rows of scanning lines, columns of signal lines, pixels arranged in rows and columns at intersections of the scanning lines and the signal lines, and power lines disposed in a corresponding manner to the rows of the pixels. The driver portion includes a main scanner, a power-supply scanner, and a signal selector. Each of the pixels includes light-emitting devices, a sampling transistor, a driving transistor, a retaining capacitor.02-16-2012
20120038619SYSTEM AND METHOD FOR CONTROLLING INDUCTIVE POWER TO MULTIPLE MODULES - A system and method for controlling power distribution from a plurality of inductive power outlets to a plurality of inductive power receivers include inductive outlets and receivers that are provided with a signal transfer system for communicating unique identification labels. Applications are described relating to the control of modular visual displays and interchangeably situated electrical devices.02-16-2012
20120038617ORGANIC LIGHT EMITTING DISPLAY DEVICE AND METHOD OF DRIVING THE SAME - There is provided an organic light emitting display device including: pixels positioned at crossing regions of scan lines and data lines; a first control line and a second control line commonly coupled to the pixels; and a control line driver for supplying a first control signal to the first control line for a reset period and for supplying a second control signal to the second control line for a compensation period, wherein each of the pixels includes: an organic light emitting diode; a first transistor for controlling an amount of current supplied from a first power source to a second power source; a second transistor configured to turn on when the second control signal is supplied; and a fourth transistor for supplying an initial voltage to a gate electrode of the first transistor when the first control signal is supplied.02-16-2012
20120038616DISPLAY APPARATUS AND METHOD OF DRIVING THE SAME - A display apparatus includes: a display panel which displays an image based on a display mode; a data driver which provides data signals to the display panel; a gate driver which starts an operation thereof in response to a start signal, and comprises stages and at least two dummy stages, where the stages sequentially provides gate signals to the display panel; and a timing controller which selects a signal from the start signal and a reset signal based on the display mode and outputs the selected signal selected to the at least two dummy stages, where each stage receives a clock signal, a previous carry signal from a previous stage, a first subsequent carry signal from a first subsequent stage and a second subsequent carry signal from a second subsequent stage, and outputs a corresponding gate signal of the gate signals and a carry signal.02-16-2012
20120038615LED SWITCH CIRCUITRY FOR VARYING INPUT VOLTAGE SOURCE - An LED array switching apparatus, comprises: a plurality of LED arrays arranged in a serial path; a voltage supply coupled to the plurality of LED arrays; a plurality of current sources selectively coupled to the LED arrays, each of the current sources being switchable between a current regulating state and an open state; and a controller that outputs at least one control signal. The controller, the at least one switch and current sources cooperate together such that: when the voltage of the voltage source is below the at least one reference voltage, and/or when a predetermined level of current passes through the one or more current sources, at least one switch is closed and one or more associated current sources are controlled so as to break the serial path into one or more parallel paths each including less than all of the LED arrays.02-16-2012
20120146984ELECTROFLUIDIC DEVICE AND OPERATION METHOD THEREOF - An electrofluidic device includes first structural layer and second structural layer. First structural layer includes first substrate; and first electrode and second electrode on the first substrate. The second electrode has an indent region surrounding and without contacting first electrode. First hydrophobic layer is at least over the second electrode. Second structural layer at one side of the first structural layer with a gap includes second substrate and groove structure layer. The groove structure layer includes an indent groove, corresponding to the indent region of the second electrode. Second hydrophobic layer is over the groove structure layer. Polar fluid is disposed in the indent groove and remains in contact with the first electrode. Non-polar fluid is disposed in the gap between the first and second structural layers.06-14-2012
20080291192CHARGE RECYCLING SYSTEM OF LIQUID CRYSTAL DISPLAY AND CHARGE RECYCLING METHOD THEREOF - A charge recycling system of a liquid crystal display includes a controller and at least one switch module. The controller outputs at least one control signal when driving signals of a gate line and a source line of the liquid crystal display are both disabled, and the switch module couples the source line to a voltage supply of a driving circuit of the liquid crystal display according to the control signal. In this way, charges stored in a liquid crystal unit coupled to the source line are recycled to the voltage supply of the driving circuit, therefore raising the utilization efficiency of charges of the liquid crystal display and lowering the power consumed by the liquid crystal display.11-27-2008
20120113085DISPLAY DEVICE USING CAPACITOR COUPLED LIGHT EMISSION CONTROL TRANSISTORS - In order to efficiently execute threshold value compensation for a driving transistor, a coupling capacitor (05-10-2012
20110316842METHOD OF DRIVING INFORMATION DISPLAY PANEL - Provided is a method of driving an information display panel in which at least two types of display media comprised of particle groups containing chargeable particles are sealed between two opposed substrates, at least one substrate being transparent, and a voltage is applied across a pair of opposed pixel electrodes formed by providing conductive films to the respective substrates to move the display media, thereby displaying an information image, wherein, in a series of alternating voltage pulses applied at the time of deleting the information image displayed on the information display panel, there is provided an OFF time, which is a period during which application voltage of 0 volt is maintained during change of polarity of each pulse voltage. With this configuration, it is possible to provide a method of driving an information display panel capable of achieving the longer lifetime of a battery at the time when the panel is driven by the battery and of preventing drop of the voltage from a power supply, by reducing a peak value of the electric current occurring at the time of deleting with the alternating voltage.12-29-2011
20110316841Power supplying apparatus for organic light emitting display - There is provided a power supplying apparatus for an organic light emitting display in which a control circuit is provided between the input end of the power supplying apparatus and DC-DC converters for generating power sources in order to prevent a power sequence from being changed by the unintentional formation of a current path. The power supplying apparatus for an organic light emitting display includes a first switching element having a gate electrode coupled to a first node and coupled between an input end and an output end of the control circuit, a second switching element, to whose gate electrode a control signal is applied and which is coupled between the input end of the control circuit and the first node, and a third switching element, to whose gate electrode the control signal is applied and which is coupled between the first node and a ground.12-29-2011
20120176362DISPLAY DEVICE, ELECTRONIC DEVICE, AND DRIVING METHOD - An electronic device is described. The device includes a substrate for a luminescence panel that includes data lines and pixels in which a luminescence element can be formed. Each pixel includes a driving transistor that converts a signal voltage from a data line into a signal current, and a first switch between the data line and the gate of the driving transistor. The device includes a first circuit to flow a test current from the data line through the driving transistor, a second circuit to generate a voltage on the data line corresponding to a gate voltage on the driving transistor generated by the test current, and a voltage detector to detect the voltage in the data line.07-12-2012
20120176361DC-DC CONVERTER AND MOBILE COMMUNICATION TERMINAL USING THE SAME - A DC-DC converter for converting an input power to generate a first power and for outputting the first power to a first output terminal, the DC-DC converter including: a resistor unit for electrically connecting a set resistor to the first output terminal when the voltage of input power is in a specific range, and a mobile communication terminal using the same. Here, the DC-DC converter is capable of reducing or removing a pulse skip mode by increasing a load of an output end if it is determined that the voltage of the input power is in the specific range, by sensing the input power.07-12-2012
20120044235ACTIVE MATRIX ORGANIC LIGHT EMITTING DIODE DISPLAY - There is provided an active matrix organic light emitting diode display, including a data driver converting pre-prepared correction data into an analog correction signal and generating a driving signal according to the analog correction signal, a selector selecting a charging path for programming, according to the driving signal in a preset programming period and selecting a deterioration detection path in a preset emission period, a pixel unit including an organic light-emitting diode connected between a power supply receiving power and a ground, charging a value corresponding to the correction data according to the driving signal in the programming period, and allowing current to flow to the organic light-emitting diode according to the charged value in the emission period, and an ADC detecting deterioration voltage having deterioration information of the organic light-emitting diode of the pixel unit in the emission period.02-23-2012
20120044239IMAGE DISPLAY DEVICE AND METHOD OF DRIVING THE SAME - An image display device includes a display portion formed by disposing pixel circuits in a matrix, and a signal line driving circuit and a scanning line driving circuit for driving the pixel circuits through signal lines and scanning lines of the display portion. The pixel circuit includes at least: a light emitting element; a drive transistor for current-driving the light emitting element by a drive current corresponding to a gate-to-source voltage thereof; a hold capacitor composed of either one capacitor or a plurality of coupling capacitors for holding therein the gate-to-source voltage; and a write transistor adapted to be turned ON/OFF in accordance with a write signal outputted from the scanning line driving circuit, thereby setting a voltage developed across terminals of the hold capacitor at a voltage of corresponding one of the signal line.02-23-2012
20120044237ACTUATION AND CALIBRATION OF CHARGE NEUTRAL ELECTRODE - This disclosure provides systems, methods, and devices for actuating, charging and calibrating the charge on a movable electrode in electromechanical systems (EMS) devices. The electromechanical systems device can include a first electrode, a second electrode spaced apart from the first electrode by a gap, a complementary electrode, at least one electrical contact, and a movable third electrode disposed between the first electrode and the second electrode. In one implementation, a method of calibrating charge on the movable electrode of the EMS device includes electrically connecting a complementary electrode to the first electrode to form a compound electrode and applying a calibration voltage across the compound electrode and the second electrode to produce a uniform electric field in the gap. Under the electric field the third electrode moves towards the first electrode until it connects with the at least one electrical contact. Once in contact with the electrical contact, an electrical charge on the third electrode can be changed and calibrated when the third electrode is in a second position. When a mechanical restorative force on the third electrode exceeds the electric force of the uniform electric field on the third electrode, the third electrode then moves to a third position.02-23-2012
20120044236Device for adjusting transmission signal level based on channel loading - A device for controlling the level of a transmission signal according to the channel loading is provided. The device may include a plurality of semiconductor devices and a controller to control the plurality of semiconductor devices. The controller may control the level of a signal to be transmitted to each of the plurality of semiconductor devices according to the channel loading on each semiconductor device.02-23-2012
20120044234PLASMA DISPLAY DEVICE AND DRIVING APPARATUS THEREOF - In a plasma display device, a secondary coil of a transformer is connected across a panel capacitor formed by a scan electrode and a sustain electrode performing a sustain discharge. The plasma display device uses resonance between a secondary coil of a transformer and a panel capacitor to apply a sustain discharge pulse to a scan electrode and a sustain electrode in a sustain period.02-23-2012
20120206434Shift Register - A shift register comprises many stages, and each of stages comprises a first, a second and a third level control unit and a first and a second control unit is provided. The first and the second level control unit respectively provides a first clock signal and a voltage to an output terminal. The first driving unit and the level control unit are coupled to a first node. The first driving unit turns on and turns off the first level control unit in response to an input signal, a second control signal and a first control signal of the next stage. The second driving unit turns on and turns off the second level control unit in response to the first control signal. The third level control unit provides a first voltage to the output terminal in response to the second control signal and the first control signal.08-16-2012
20120206433LED DRIVING APPARATUS - An LED driving apparatus comprising: a power feed unit; a driving control unit; a current detection unit that detects load current flowing in an LED module; and an output control unit that determines whether the LED module is under conducting state or opening state, and outputs a signal in accordance with a result of the determination, wherein, when the LED module is under conducting state, the output control unit outputs a first signal to the driving control unit so that the load current is constant, wherein, when the LED module is under opening state, the output control unit outputs a second signal to the driving control unit so that a voltage becomes a predetermined constant-voltage value, and wherein the predetermined voltage value is a voltage or higher, at which the LED module starts conduction, and a voltage or lower corresponding to an upper limit of the LED.08-16-2012
20120001890Switchable 3-Dimensional Conversion Device, Method for Manufacturing the Same and Stereoscopic Image Display Device Using the Same - The present invention is for a switchable 3-dimensional conversion device having a spacer stably formed at a predetermined height by imprinting, a manufacturing method thereof and a stereoscopic image display device using the same, the method includes: providing a first electrode on an inner surface of a first substrate; applying a resin material to the first electrode to a predetermined thickness; placing a mold structure which has a concave part formed with a predetermined depth thereon, on the resin material; stamping the resin material using the mold structure, in order to form a spacer pattern; dry etching the spacer pattern to form a spacer; forming a plurality of second electrodes, which are spaced from one another and have longitudinal axes in one direction, respectively, on a second substrate; and arranging the first and second substrates opposite to each other, bonding the same, and forming a liquid crystal layer between the first and second substrates.01-05-2012
20120001892OPERATIONAL AMPLIFIER CIRCUIT, SIGNAL DRIVER, DISPLAY DEVICE, AND OFFSET VOLTAGE ADJUSTING METHOD - Provided is an operational amplifier circuit including: a first input terminal; a second input terminal; an output terminal; a differential amplifier that amplifies a potential difference between the first input terminal and the second input terminal, and outputs, to the output terminal, the amplified difference as an output signal; a first correction current supply unit configured to supply the differential amplifier with a first correction current to adjust an input offset voltage of the operational amplifier circuit; and a second correction current supply unit configured to supply the differential amplifier with a second correction current to adjust the input offset voltage of the operational amplifier circuit at intervals longer than intervals of adjustment by the first correction current supply unit.01-05-2012
20120001889ELECTRIC FIELD DRIVING DISPLAY DEVICE - It is an object to provide an electric field driving display device capable of displaying a high quality image and to provide an electric field driving display device in which residual images in an outline of a pixel is prevented from occurring. An insulating film is formed over a second electrode and a plurality of first electrodes are provided over the insulating film. Each of the first electrodes is electrically connected to the second electrode. The second electrode is provided to partly overlap a region between the adjacent two first electrodes. In other words, viewing the top and the bottom of the display device, the adjacent first electrodes are provided apart from each other and the second electrode is provided to embed a space between the adjacent first electrodes.01-05-2012
20110096058LIQUID CRYSTAL DISPLAY DEVICE - A liquid crystal display device includes a plurality of pixels each including a liquid crystal element of VA mode and a drive section. The drive section space-divisionally or time-divisionally performs a display drive operation so that the operation includes first and second divisional-drive operation groups. The drive section performs an operation in the first or second divisional-drive operation group, or both thereof. In the former, the output voltage exceeds the input voltage in the intermediate luminance range, whereas in a highlight luminance range, exceeds the input voltage but shows a tendency to be lower compared to in the intermediate luminance range. In the latter, the output voltage is lower than the input voltage in the intermediate luminance range, whereas in a lowermost luminance range, equal to or lower than the input voltage but shows a tendency to be higher compared to in the intermediate luminance range.04-28-2011
20120007848ORGANIC LIGHT EMITTING DISPLAY - An organic light emitting display includes a display unit including pixels coupled to scan lines, first control lines, second control lines, and data lines, a control line driver configured to supply a first control signal and a second control signal to the pixels through the first control lines and the second control lines, a first power source driver for applying a first power to the pixels of the display unit, and a second power source driver for applying a second power to the pixels of the display unit. At least one of the first power or the second power is applied to the pixels of the display unit as voltage values having different levels during one frame. The first and second control signals and the first and second powers are concurrently provided to all of the pixels of the display unit.01-12-2012
20120044238LIQUID CRYSTAL DRIVING DEVICE, LIQUID CRYSTAL DISPLAY APPARATUS, ELECTRONIC APPARATUS AND LIQUID CRYSTAL DRIVING METHOD - There is disclosed a liquid crystal driving device which improves crosstalk using the function of adjusting an interlaced line number of common electrodes and the function of adjusting a polarity reversion line number.02-23-2012
20090167747TFT-LCD DRIVER CIRCUIT AND LCD DEVICES - Thin film transistor liquid crystal display (TFT-LCD) driver circuit having a source drive buffer with an operational power amplifier having two differential amplifiers capable of alternating operation according to timing and bias voltage signals. The differential amplifiers are further capable of functioning as a voltage follower by inputting and outputting voltage signals from a digital to analog converter for charging display points. The TFT-LCD driver circuit may also be incorporated within a LCD device.07-02-2009
20120013596Liquid Crystal Display - A pixel structure of a liquid crystal cell that is implemented in a filed sequential liquid crystal display and a method of driving the same. The liquid crystal display includes: a liquid crystal display panel including a plurality of scan lines and data lines, and a plurality of pixels connected to the scan lines and the data lines and arranged in a matrix form; a control signal generating unit for providing a control signal and a reset signal to the pixels of the liquid crystal display panel respectively; a common voltage generating unit for providing a common voltage to the respective pixels; and a boosting voltage generating unit for providing a boosting voltage to the respective pixels.01-19-2012
20120013597PIXEL AND ORGANIC LIGHT EMITTING DISPLAY USING THE SAME - A pixel is capable of securing enough threshold voltage compensating time in high resolution and high frequency driving and of compensating for the IR drop of a first power source ELVDD, and an organic light emitting display includes the pixel.01-19-2012
20120056866ACTIVE MATRIX ORGANIC LIGHT EMITTING DIODE DISPLAY HAVING RESET FUNCTION - There is provided an active matrix organic light emitting diode (AMOLED) display including a driver generating analog driving signals based on previously prepared driving data; a pixel unit including an organic light emitting diode connected between first and second power supply terminals receiving first and second power, respectively, charging values equivalent to the driving data according to the driving signals and simultaneously detecting the driving signals in order to detect deterioration in a preset tracking period, allowing current to flow through the organic light emitting diode according to the values charged in the tracking period in a preset holding period, and setting a reset period between the holding period and a tracking period subsequent thereto to reset the charged values; and an ADC detecting a deterioration voltage corresponding to the driving signals having deterioration information of the organic light emitting diode of the pixel unit in the tracking period.03-08-2012
20120056868DRIVER FOR AN OLED DEVICE03-08-2012
20120056867SYSTEM AND METHOD OF LEAKAGE CURRENT COMPENSATION WHEN SENSING STATES OF DISPLAY ELEMENTS - This disclosure provides systems, methods and apparatus for calibrating display arrays. A leakage compensation circuit is provided in conjunction with a circuit for sensing display element states. The leakage compensation circuit may include a leakage current integrator and a voltage to current converter.03-08-2012
20120056864DYNAMIC VOLTAGE SUPPLY FOR LCD TIMING CONTROLLER - An integrated circuit voltage supply circuitry for liquid crystal display and a method are disclosed. The voltage supply comprises a DC voltage regulator having a reference voltage input and a feedback voltage input; a positive voltage pin and a negative voltage pin providing power to the DC voltage regulator; a network of resistors comprising a plurality of parallel branches, each branch having at least one resistor and one node; a plurality of LCD modules supported by the DC voltage regulator, each module connecting to the node of each parallel branch; a plurality of diodes each formed between the node of one module and a feedback diode; and the feedback diode connected to the feedback voltage input of the DC voltage regulator, wherein the DC voltage regulator keeps the voltage for each LCD module not lower than the reference voltage, regardless of each module's consumption of current.03-08-2012
20120120047Method of Supplying Power, Power Supply Apparatus for Performing the Method and Display Apparatus Having the Power Supply Apparatus - A power supply apparatus includes a storage battery, a power part and a solar battery part. The storage battery provides a charged voltage to an electronic device. The power part provides an external voltage to the electronic device and simultaneously charges the storage battery, upon determining that the external voltage is provided to the power supply apparatus. The solar battery part charges the storage battery using a voltage output by a solar battery upon determining that the external voltage is not provided to the power supply apparatus and the electronic device is not in use, and provides the voltage output by the solar battery and the charged voltage output by the storage battery to the electronic device, upon determining that the external voltage is not provided to the power supply apparatus and the electronic device is in use.05-17-2012
20120206436LIQUID CRYSTAL DISPLAY DEVICE AND METHOD FOR DRIVING LIQUID CRYSTAL DISPLAY DEVICE - An object of the present invention is to provide a liquid crystal display device capable of improving a viewing angle, while not decreasing an aperture ratio and preventing an increase in electricity consumption. A liquid crystal display device (08-16-2012
20090135173Liquid crystal display and method of driving liquid crystal display - In a liquid crystal display that generates a drive voltage based on input image data corresponding to an image, and applies the drive voltage to a liquid crystal pixel, thereby displaying the image, a plurality of sub-frame data for displaying a plurality of sub-frames are generated. On this occasion, a sub-frame data generation section varies a gray-scale value of the sub-frame data so that luminance values of the sub-frame data are different from each other. Thus, the view angle characteristic can be improved, and the display quality can also be improved.05-28-2009
20090135172PLASMA DISPLAY DEVICE AND PLASMA-DISPLAY-PANEL DRIVING METHOD - In a plasma-display-panel driving method, a field period is divided into a plurality of sub fields, each of which has an address period for allowing discharge cells to selectively generate an address discharge and a sustain period for allowing the discharge cells having generated the address discharge to generate a sustain discharge by a number of times corresponding to a brightness weight. In the sustain period, a period for setting display electrode pairs to the base potential is disposed between the sustain pulse for causing the final sustain discharge in the sustain period and the previous sustain pulse. In a time interval corresponding to the lighting ratio of the discharge cells in the sub field after applying to the display electrode pairs a voltage for generating the final sustain discharge, a voltage for reducing the potential difference between electrodes of the display electrode pairs is applied to the display electrode pairs. Accordingly, it is possible to generate a stable address discharge and thus to reduce a crosstalk without increasing the voltage for generating the address discharge.05-28-2009
20120154369PIXEL CIRCUIT AND DISPLAY DEVICE - A display device includes liquid crystal capacitor element formed between a pixel electrode and a counter electrode. One terminals of the pixel electrode, a first switch circuit, and a second switch circuit, and a first terminal of a second transistor form an internal node. The first switch circuit and the second switch circuit have other terminals connected to a source line. The second switch circuit is configured by a series circuit of transistors, and a control terminal of the transistor, a second terminal of the transistor, and one terminal of a boost capacitor element form an output node. The other terminal of the boost capacitor element is connected to a boost line, the control terminal of the transistor is connected to a reference line, and the control terminal of the transistor is connected to a selecting line.06-21-2012
20120026154DIGITAL-TO-ANALOG CONVERTER CIRCUIT AND DISPLAY DRIVER - Provided first and second reference voltage set wherein the first reference voltage set includes a part or all of reference voltages of the second reference voltage set, and a decoder including first and second sub-decoder sections that select Q reference voltages from first and second reference voltage sets according to upper bits of the input digital signal and transfer the so selected reference voltages to the first to Qth nodes, and third and fourth sub-decoder sections that select first and second voltages from the Q reference voltages transferred to the first to Qth nodes according to lower bits of the input digital signal and transfer the so selected voltages to the first to Pth nodes. The first and third sub-decoder sections are made up of first conductivity type transistors, whilst the second and fourth sub-decoder sections are made up of second conductivity type transistors. Also provided an amplifier circuit takes a weighted average of voltages at the first to Pth nodes at a preset weighting factors and outputs the weighted average voltage at an output terminal as an analog signal corresponding to the input digital signal.02-02-2012
20120026152OVER-DRIVABLE OUTPUT BUFFER, SOURCE DRIVER CIRCUIT HAVING THE SAME, AND METHODS THEREFOR - Provided is an output buffer for a source driver circuit which receives an external buffer input signal and generates a buffer output signal having a predetermined target voltage, the output buffer including: an over-driving controller configured to generate a pair of first internal buffer input signals and a pair of second internal buffer input signals for an over-driving operation, based on a first over-driver enable signal and a second over-driver enable signal, the first and second over-driver signals being provided from an external source, and an output buffer unit configured to: perform the over-driving operation, based on the pair of first internal buffer input signals and the pair of second internal buffer input signals provided from the over-driving controller, and generate: a buffer output signal including a target voltage greater than the predetermined target voltage, or a buffer output signal including a target voltage less than the predetermined target voltage.02-02-2012
20120026151LIQUID CRYSTAL DISPLAY - A liquid crystal display is disclosed. The liquid crystal display includes a data driving circuit, that converts digital video data into positive and negative data voltages, supplies the positive and negative data voltages to data lines of a liquid crystal display panel, and causes the data voltages supplied to the same data line to have the same polarity during one frame period, and a gate driving circuit sequentially supplying a gate pulse to gate lines of the liquid crystal display panel. Subpixels of the liquid crystal display panel include first and second subpixels positioned adjacent to each other in a horizontal direction. Each of the first and second subpixels is successively charged to the data voltages of two colors.02-02-2012
20120062546DATA DRIVER - A data driver includes two data processing circuits for respectively providing positive and negative pixel voltages according to first and second pixel data, and a multiplexer circuit including multiplexer units. Each multiplexer unit has first and second input terminals respectively receiving the positive and negative pixel voltages, and an output terminal coupled to a data line. A first switching device has first and second switches serially coupled between the first input and output terminals. A node between the first and second switches is selectively grounded via a third switch. A second switching device has fourth and fifth switches serially coupled between the second input and output terminals. A node between the fourth and fifth switches is selectively grounded via a sixth switch. When the first and second switches turn on, the sixth switch turns on. When the fourth and fifth switches turn on, the third switch turns on.03-15-2012
20120062544DRIVE DEVICE - A drive device drives a display panel through alternately applying a positive polarity gradation voltage and a negative polarity gradation voltage to the display panel. The drive device includes an amplifier unit for amplifying a voltage applied to an input to obtain an amplified gradation voltage, and a voltage generation unit for generating the positive polarity gradation voltage and the negative polarity gradation voltage according to the amplified gradation voltage. The amplifier unit selects one of the positive polarity gradation voltage and the negative polarity gradation voltage immediately before the amplifier unit switches a gradation reference voltage. The selected gradation voltage has a polarity the same as that of the gradation reference voltage to be applied to the input line after the amplifier unit switches the gradation reference voltage.03-15-2012
20120062545DISPLAY DEVICE AND DRIVING METHOD THEREOF - A display device and a driving method thereof are provided. The display device includes: a display unit including a plurality of pixels; a scan driver for transmitting scan signals to the plurality of pixels; a data driver for transmitting data signals to the plurality of pixels; and an initialization control driver for generating and transmitting an initialization signal to initialize data voltages corresponding to the data signals of a previous frame charged in the plurality of pixels during a first period of one frame.03-15-2012
20120062543LIQUID CRYSTAL DISPLAY APPARATUS, DRIVE CIRCUIT THEREFOR, AND DRIVE METHOD THEREFOR - A liquid crystal display apparatus is disclosed, which is capable of suppressing sound emission caused by the AC drive of liquid crystal while suppressing an increase in power consumption. A non-active period during which polarity reversal of a common electrode signal (VCOM) is repeated at predetermined intervals is provided in each horizontal scanning period. During an active period, a common electrode drive circuit provides a common electrode signal (VCOM) indicating either one of potentials LV03-15-2012
20120062542Liquid crystal display panel with function of compensating feed-through effect - An LCD panel with function of compensating feed-through effect includes plural groups of pixels, a gate-driving circuit, a data-driving circuit, and a gamma voltage generator. Each group of pixels includes first pixel and second pixel. The first pixel and the second pixel share a data line, and are respectively coupled to first gate line and second gate line. When the gate-driving circuit drives the first gate line, the gamma voltage generator provides un-compensated gamma voltages for the data-driving circuit writing data to the first pixel. When the gate-driving circuit drives the first and the second gate lines at the same time, the gamma voltage generator provides gamma voltages compensated by a compensating voltage level for the data-driving circuit writing data to the second pixel. In this way, the feed-through effect suffered by the second pixel is compensated, so that each pixel of the LCD panel can display with correct brightness.03-15-2012
20120206435LIQUID CRYSTAL DISPLAY DEVICE WITH CHARGING AND DISCHARGING MODULE - By way of enabling a reset signal while turning off a liquid crystal display, a method for decaying residual image of the liquid crystal display is capable of setting the corresponding gate signal of each of a plurality of gate lines of the liquid crystal display based on the enabled reset signal. Accordingly, enhanced discharging processes on all the storage units of the liquid crystal display for fast decaying residual image can be performed via the data switches of the liquid crystal display turned on by the gate signals being set. The reset operation for performing discharging processes in response to the reset signal can be carried out based on a reset circuit for setting all the gate signals to become high-level signals, or based on a charging/discharging module for furnishing a high-level voltage directly to all the gate lines.08-16-2012
20120154368LIQUID CRYSTAL DISPLAY ELEMENT, LIQUID CRYSTAL DISPLAY DEVICE, AND DISPLAY METHOD EMPLOYED IN LIQUID CRYSTAL DISPLAY ELEMENT - Picture element electrodes (06-21-2012
20110090212SHARE-CAPACITOR VOLTAGE STABILIZER CIRCUIT AND METHOD OF TIME-SHARING A CAPACITOR IN A VOLTAGE STABILIZER - A voltage stabilizer circuit for alternately or simultaneously stabilizing first and second generated voltages includes shared capacitor connected between the first and second generated voltages. The voltage stabilizer circuit may further include first and second switches for alternately connecting the first and second electrode of the shared capacitor to a ground. The alternation of the stabilized first and second voltages output by the voltage stabilizer circuit can be synchronized with a pixel polarity inversion mode signal output by the internal driver circuit of an LCD display.04-21-2011
20110102412Liquid Crystal Display Device - A liquid crystal display device includes one pixel in a liquid crystal display section comprises a plurality of sub-pixels, and each of the plurality of sub-pixels being driven by a transistor connected with a signal line. The plurality of sub-pixels include a first red sub-pixel, a second green sub-pixel, and a third blue sub-pixel, and a fourth sub-pixel which includes a display auxiliary area. Voltage-transmittance characteristics on the display auxiliary pixel area are shifted to a higher voltage in comparison with a voltage of the first to the third sub-pixels.05-05-2011
20110102410CIRCUIT AND METHOD FOR DRIVING OLED DISPLAY - A circuit for driving an organic light emitting diode display includes a display panel that displays an image by using organic light emitting diodes disposed at intersection areas of a plurality of gate lines and a plurality of data lines; a threshold voltage detection control unit that supplies a precharge voltage by sequentially turning on transistors for threshold voltage detection, which are connected among the data lines and the organic light emitting diodes on the display panel, in units of horizontal lines, and enables threshold voltages to be detected; and a source driver that detects threshold voltages of all organic light emitting diodes arranged on a corresponding horizontal line, and repeats an operation, as necessary, for sampling/holding the detected threshold voltages through M sample/hold circuits, converting the sampled/held threshold voltages into digital signals, and storing the digital signals in a memory.05-05-2011
20110102411Low-Power Display Control Method and Associated Display Controller - A low-power display control method and associated display controller is provided. The low-power display control method detects a sensing signal to generate a sensing result. A control signal is generated according to the sensing result to control a power conversion controller to operate in a low-power power saving mode. In response to a wake-up event, the control signal is deasserted and an associated auxiliary circuit is also turned off, and then the display controller is woken up to restore to a normal operating mode.05-05-2011
20110102409DRIVER CIRCUIT, DISPLAY DEVICE INCLUDING THE DRIVER CIRCUIT, AND ELECTRONIC DEVICE INCLUDING THE DISPLAY DEVICE - One object is, when a thin film transistor whose channel is formed using an amorphous semiconductor is used for a driver circuit formed using only n-channel transistors or p-channel transistors, to provide a driver circuit in which the threshold voltage is compensated in accordance with the degree of change in the threshold voltage. In the driver circuit which includes a unipolar transistor including a first gate and a second gate which are disposed above and below a semiconductor layer with insulating layers provided therebetween, a first signal for controlling switching of the transistor is inputted to the first gate, a second signal for controlling a threshold voltage of the transistor is inputted to the second gate, and the second signal is controlled in accordance with a value of current consumption including a current which flows between a source and a drain of the transistor.05-05-2011
20120256898DRIVING AN ELECTROWETTING DISPLAY DEVICE - A method of driving an electrowetting display device that includes a display element having a cavity; a first fluid and a second fluid within the cavity, the first fluid being immiscible with the second fluid; a surface facing the cavity; and a first electrode. The display device includes a control system for applying a voltage to the first electrode to provide a display state in response to a signal level of the voltage, wherein the control system is arranged to configure the signal level throughout a display period such that the second fluid adjoins at least a minimum area of the surface, the minimum area being greater than a zero area. The method includes applying at least one display signal level during the display period, the at least one display signal level configured such that the first fluid and the second fluid adjoin the surface throughout the display period.10-11-2012
20120120048Drive Control Method, Drive Controller, And Display Device - A drive control method for a display panel configured to constantly provide a good display quality with ensuring that EMI countermeasures are properly carried out is accomplished. Image data used to display a plurality of drive regions of a display panel obtained by dividing the display panel is supplied to data drivers of the plurality of drive regions based on transmission clock signals respectively having different transmission clock frequencies suitable for the plurality of divided drive regions, a common drive-start control signal used for all of the plurality of drive regions is generated based on a reference clock signal having a clock frequency different from any of the transmission clock frequencies, and drive signals start to be output from the data drivers of the plurality of drive regions to display elements corresponding to the respective data drivers at a same timing based on the supplied drive-start control signal.05-17-2012
20120169707ORGANIC EL DISPLAY DEVICE AND CONTROL METHOD THEREOF - An organic electroluminescent display device includes a display that includes pixels arranged in a matrix. Each pixel includes a driver, a capacitor between a gate and a source of the driver, a switch, and a luminescent element connected to the drain of the driver. Scan lines provide a scan signal for scanning the pixels. Data lines provide a signal voltage to the pixels. Power lines are electrically connected to the source and the drain of the driver. The driver includes a back gate electrode which is provided a predetermined bias voltage. A drive circuit provides the predetermined bias voltage to the back gate electrode so that the absolute value of a threshold voltage of the driver is greater than a gate-source voltage of the driver to place the driver in a non-conducting state.07-05-2012
20120169706GATE DRIVE METHOD AND GATE DRIVE DEVICE OF LIQUID CRYSTAL DISPLAY - The embodiments of the present disclosure discloses a gate drive method and a gate drive device of a liquid crystal display, which can avoid the influence by the voltage difference ΔVp between the pixel voltage and the data line voltage, and eliminate the flickering phenomenon and the residual image caused by the residual direct current effectively. The gate drive method of the liquid crystal display comprises: inputting a compensation voltage Vgc to the n-th row of gate line when the n-th row of gate line is turned off completely in the current frame; keep on inputting the compensation voltage Vgc; and stopping inputting the compensation voltage Vgc to the n-th row of gate line when a turn-on voltage Vgh is input to the n-th row of gate line in the next frame; wherein, N≦the total number of the gate lines.07-05-2012
20120169703SHIFT REGISTER CIRCUIT - A shift register circuit includes plural shift register stages for providing plural gate signals. Each shift register stage includes a driving unit, an input unit, a driving adjustment unit and a pull-down unit. The driving unit is utilized for outputting a gate signal according to a system clock and a driving control voltage. The input unit is put in use for outputting the driving control voltage according to an input control signal and a first input signal. The driving adjustment unit is employed for adjusting the driving control voltage according to a second input signal and a third input signal. The pull-down unit is used for pulling down the gate signal and the driving control voltage according to a fourth input signal.07-05-2012
20120162186Electrophoretic Display Apparatus and Method of Controlling the Same - An electrophoretic display apparatus and a method of controlling the same. The electrophoretic display apparatus includes an electrophoretic cell including a lower electrode and in-plane electrodes, wherein the lower electrode and the in-plane electrodes are connected to same data line and receive data voltages in response to other gate signals. According to embodiments of the present invention, the number of channels in a data driving unit may be decreased by a few times.06-28-2012
20120162182FLAT PANEL DISPLAY DEVICE AND OPERATING VOLTAGE ADJUSTING METHOD THEREOF - An exemplary operating voltage adjusting method for a flat panel display device including at least a first testing pixel is provided. In the operating voltage adjusting method, a plurality of testing operating voltages are provided. The at least a first testing pixel operative with the testing operating voltages in sequence then is enabled to be charged by a first specific data and a plurality of first data voltages stored in the at least a first testing pixel effected by the testing operating voltages respectively can be obtained. Afterwards, an operating voltage of the flat panel display device is determined according to states of the first data voltages in a testing period. Moreover, an exemplary structure of the flat panel display device also is provided.06-28-2012
20120212474IMAGE DISPLAY DEVICE AND METHOD OF DRIVING THE SAME - An image display device capable of reducing power consumption. The image display device includes: a position determining unit for determining positions of horizontal lines to which data input to a timing controller are to be supplied; a look-up table (LUT) for storing pre-emphasis voltage information corresponding to the positions of the horizontal lines; the timing controller for transmitting the data and the pre-emphasis voltage information to a data driver; a pre-emphasis voltage generator for generating a pre-emphasis voltage to correspond to the pre-emphasis voltage information from the data driver; and the data driver for supplying the pre-emphasis voltage to data lines in a partial period of a horizontal period and for supplying a data signal in a remaining period of the horizontal period.08-23-2012
20100289790METHOD FOR DRIVING BISTABLE DISPLAY DEVICE - A method for driving a bistable display device is provided. The bistable display device has a matrix of pixels arranged in a plurality of rows and a plurality of columns, a timing controller and a source driver. The timing controller is configured to sequentially output control signals which correspond to a positive high voltage, a negative high voltage and a ground voltage respectively to the source driver. The source driver is configured to drive each pixel with the voltages corresponding to the control signals. The method comprises: providing only the positive high voltage or the ground voltage to one of two pixels in two adjacent rows of the same column if the source driver provides the positive high voltage to the other one when the source driver consecutively drives the two pixels.11-18-2010
20100289789PLASMA DISPLAY DEVICE - A plasma display device is provided. The plasma display device includes a plasma display panel (PDP) including an upper substrate, on which first and second electrodes are formed, and a lower substrate, on which a third electrode is formed; and a driving unit applying a sustain signal to the first and second electrodes, wherein a negative voltage signal and a positive voltage signal are applied to the first and second electrodes, respectively, after a number of sustain discharges caused by the sustain signal. Therefore, it is possible to efficiently accumulate space charges on each electrode and thus to address the problems associated with a shortage of wall charges such as a misdischarge and a dark discharge.11-18-2010
20100245330POWER SAVING TRANSMISSIVE DISPLAY - For reduced power wastage, a transmissive display (09-30-2010
20100245331DISPLAY DEVICE AND METHOD FOR CONTROLLING THE SAME - A display device is provided which includes a luminescence element, a data line, and a switch connected between an electrode of the luminescence element and the data line. A voltage generation circuit supplies a pre-charge voltage to the data line. A current generation circuit supplies an inspection current to the electrode of the luminescence element plural times through the data line and the switch. A voltage detection circuit detects, the plural times, voltage values of the electrode supplied with the inspection current. When a difference between the voltage values is at least a predetermined value, the voltage generation circuit supplies the data line with an updated voltage that is higher than the pre-charge voltage.09-30-2010
20120162189DRIVER CIRCUIT AND VIDEO SYSTEM - In a driver circuit in a transmission system, an output circuit outputs a differential signal based on input data signals. A current source control circuit controls a constant current source so that a common-mode potential of the differential signal becomes equal to a predetermined reference potential. An overshoot reduction circuit is connected to an input line of the common-mode potential of the current source control circuit, and reduces an overshoot of the common-mode potential based on the control signal.06-28-2012
20120127148DISPLAY SUBSTRATE, DISPLAY PANEL AND DISPLAY DEVICE - A display substrate includes an insulating substrate, a first gate line, a first lower electrode, a second lower electrode, a first upper electrode, and a second upper electrode. The insulating substrate includes a first pixel region and a second pixel region located at a first direction from the first pixel region. The first gate line extends in a second direction crossing the first direction on the insulating substrate. The first and the second lower electrodes are in the first and the second pixel regions, respectively. The first upper electrode overlaps the first lower electrode in the first pixel region and includes a first slit pattern extending in a third direction different from the first and the second directions. The second upper electrode overlaps the second lower electrode in the second pixel region and includes a second slit pattern extending in a fourth direction different from the first to third directions.05-24-2012
20120127152ELECTRO-OPTICAL DEVICE DRIVER CIRCUIT, ELECTRO-OPTICAL DEVICE, AND ELECTRONIC APPARATUS - A circuit includes a first logic circuit section that outputs a signal that could be in an active voltage level depending on a transfer-signal input from a shift register throughout a display period and outputs a signal whose voltage is constant at the active voltage level throughout an off sequence period; an enable signal output section that outputs an enable signal that is pulsed during the display period; and a second logic circuit section that outputs a signal corresponding to a logical product of the output signal of the first logic circuit section and the enable signal. The enable signal output section keeps the voltage of the enable signal constant at the active voltage level throughout the off sequence period.05-24-2012
20120127151POWER SUPPLY DEVICE, LIQUID CRYSTAL DRIVE DEVICE, AND LIQUID CRYSTAL DISPLAY DEVICE - The power supply device according to the present invention comprises a first power supply circuit arranged to generate a first output voltage from an input voltage; and a second power supply circuit arranged to generate from the input voltage a second output voltage that is less than the first output voltage, wherein the first power supply circuit performs feedback control of the first output voltage so as to cause a first feedback voltage that corresponds to the first output voltage to match a predetermined reference voltage; and the second power supply circuit performs feedback control of the second output voltage so as to cause a second feedback voltage that corresponds to the second output voltage to match the first feedback voltage.05-24-2012
20120127149SEMICONDUCTOR DEVICE, LIQUID CRYSTAL DISPLAY PANEL, AND MOBILE INFORMATION TERMINAL - A semiconductor device includes a plurality of sets of external drive terminals in a marginal region along one long side of a rectangular semiconductor substrate, a plurality of sets of ESD protection circuits arranged in the marginal region and coupled to corresponding sets of the drive terminals, and a plurality of output circuits coupled to corresponding sets of the drive terminals. Each set of drive terminals in a plurality of n columns along a Y direction is laid out in a staggered arrangement with drive terminals in adjacent columns shifted relative to each other. Each output circuit includes n output units associated with n drive terminals of each set and arranged in one column in an X direction. By the arrangement, the drive terminals can be arranged at a narrower pitch, and the total width for n output units can be compacted into that of one output circuit.05-24-2012
20120127147Liquid Crystal Display and Driving Method Thereof - A liquid crystal display having: a liquid crystal display panel comprising a plurality of pixels; a data driver applying a data voltage to a plurality of data lines connected to the plurality of pixels; an initial voltage driver applying an initial voltage to the plurality of data lines before the data voltage is applied; and a boost driver applying a boost voltage to a plurality of boost lines connected to the plurality of pixels and boosting voltages of the plurality of pixels to which the data voltage is applied. Crosstalk caused by noise generated in a boost line can be reduced by coupling with a data line, and an ALS driving scheme can be applied to a liquid crystal display having high resolution.05-24-2012
20120162181DISPLAY PANEL, PIXEL CIRCUIT AND DRIVING METHOD OF DIFFERENTIAL VOLTAGE DRIVEN DEVICE THEREIN - A display panel, a pixel circuit and a driving method of a differential voltage driving device are disclosed. The driving method includes: respectively supplying an alternating common voltage in a first polarity and a first display data in a second polarity to two terminals of the differential voltage driven device in a first frame; disconnecting the differential voltage driven device from the alternating common voltage, thereby keeping one terminal of the differential voltage driving device at the first polarity of the alternating common voltage; converting the alternating common voltage to the second polarity in a second frame which is consecutive to the first frame; and respectively supplying the alternating common voltage in the second polarity and a second display data in the first polarity to the two terminals of the differential voltage driving device in the second frame, here the first polarity is inverse to the second polarity.06-28-2012
20100207926METHOD OF DRIVING PLASMA DISPLAY PANEL - A method of driving a plasma display panel including a scan electrode and a sustain electrode positioned substantially parallel to each other and an address electrode crossing the scan electrode and the sustain electrode is provided. The method includes supplying a first reset signal to the scan electrode during a reset period of at least one of a plurality of subfields of a frame, and supplying a second reset signal following the first reset signal to the scan electrode. The first and second reset signals each include a rising signal with a gradually rising voltage and a falling signal with a gradually falling voltage. The number of falling signals of the first reset signal is different from the number of falling signals of the second reset signal.08-19-2010
20120212475INSPECTION METHOD - An inspection method for an active-matrix substrate including the scanning lines, the data lines, the pixels disposed in matrix, and the power lines. The pixel includes: an organic EL device; a drive transistor; a capacitor; a selection transistor having a gate connected to the scanning line and connected between the data line and the gate of the drive transistor, and the guard potential transistor having a gate connected to a source of the selection transistor, a source connected to a drain of the selection transistor, and a drain connected to the power line. The inspection method includes: a writing process for writing a charge in the capacitor; a reading process for reading the written charged from the capacitor; and a holding process for holding the charge for a predetermined period from the end of the writing process to the start of the reading process.08-23-2012
20120299903SOURCE DRIVER CIRCUIT OF LIQUID CRYSTAL DISPLAY DEVICE - Provided is a technology for preventing noisy data from being displayed before valid data is inputted when power is turned on in a liquid crystal display. A source driver circuit for a liquid crystal display includes: a power supply voltage input unit configured to divide a first power supply voltage and a second power supply voltage, such that a middle level of the second power supply voltage is lower than a level of the first power supply voltage; a power supply voltage comparison unit configured to compare division voltages inputted from the power supply voltage input unit, and output an output voltage of a high level in a time period in which the middle level of the second power supply voltage is higher than the level of the first power supply voltage; a Schmitt trigger configured to output the output voltage of the power supply voltage comparison unit as a reset signal while preventing a sensitive response to external environment; and a specific voltage supply unit configured to output a voltage of a specific level in a time period between the input of the reset signal from the Schmitt trigger and the input of a first gate start pulse.11-29-2012
20120299901LIQUID CRYSTAL DISPLAY PANEL AND DRIVING METHOD THEREOF - The present disclosure relates to an LCD panel and a driving method thereof for realizing the embedded touchscreen function of such a LCD panel. The LCD panel according to the present disclosure comprises: an array substrate, a color filter substrate and a layer of liquid crystal provided between the two substrates, with gate lines and data lines are formed on the array substrate to define pixel units. An embedded touchscreen component is provided on the inner side of the array substrate, comprising: a first conductive line and a second conductive line. The first conductive line and the second conductive line constitute a two-layer structure, with a semiconductor layer being provided between the first conductive line and the second conductive line within the overlapping area of the two lines.11-29-2012
20120299900SCANNING ORDERS IN INVERSION SCHEMES OF DISPLAYS - Updating an image of a display is provided by scanning rows of sub-pixels of the display by applying voltages to pixel electrodes of adjacent sub-pixels in different lines such that polarity changes in opposite directions can occur in two sub-pixels that are adjacent to a particular sub-pixel. In one example, a positive-polarity voltage can be applied to one sub-pixel that is adjacent to a particular sub-pixel, causing a swing in the polarity of the sub-pixel from negative to positive. A negative-polarity voltage can be applied to another sub-pixel that is adjacent to the particular sub-pixel, swinging the polarity of the pixel electrode from positive to negative. A change in brightness of the particular sub-pixel that may result from a voltage swing one direction in an adjacent sub-pixel may be offset by a change in brightness of the particular sub-pixel that may result from a voltage swing in another adjacent sub-pixel.11-29-2012
20110181584LIQUID CRYSTAL DISPLAY DEVICE AND METHOD FOR FABRICATING THE SAME - An LCD device is disclosed, to minimize the signal distortion by decreasing the instability of voltage in a-Si:H TFT of a gate driving signal output unit, which includes a signal controller for outputting first and second control signals Q and /Q; a pull-up transistor between a clock signal terminal CLK and a gate driving signal output terminal for receiving the first control signal Q, the pull-up transistor having a first gate electrode, a first source electrode and a first drain electrode, wherein the pull-up transistor has an asymmetric structure in a first area of the first source electrode overlapped with the first gate electrode and a second area of the first drain electrode overlapped with the first gate electrode; and a pull-down transistor connected between the gate driving signal output terminal and a ground voltage terminal, wherein the pull-down transistor receives the second control signal.07-28-2011
20110181582Load Driving Device and Portable Apparatus Utilizing Such Driving Device - A load such as an LED and a constant-current source are connected in series with each other between the node of a dc-dc conversion type power supply circuit providing an output voltage and the ground. The constant-current source provides a constant current Io, the magnitude of which can be adjusted. The power, supply circuit controls the output voltage such that the voltage drop across the constant-current source serving as a detection voltage becomes equal to a reference voltage. Thus, the load current can be varied within a predetermined range while avoiding the power loss due to an increase in the load current, thereby always permitting efficient operation of the load.07-28-2011
20110181581METHOD FOR DRIVING INFORMATION DISPLAY PANEL - In a method for driving an information display panel to display information such as an image, in which a display medium comprised of a particle group containing charged particles is sealed between two opposing substrates, at least one of which is transparent; and in which a voltage is applied across opposing pixel electrodes formed such that conductive films provided to the respective substrates are arranged so as to face each other, to drive the display medium, the number of times of application of the pulse voltage applied at the time of rewriting a display is varied according to a filling quantity of the charged particles. In this manner, the method for driving an information display panel can expect improvement of contrast, shortening of time required for drawing, and reduction in electrical power consumption at the time of writing of display at the same time can be provided.07-28-2011
20110181580METHOD AND DEVICE FOR DRIVING BISTABLE NEMATIC DOT MATRIX LIQUID CRYSTAL DISPLAY - A driving device includes a bistable liquid crystal display panel having a common line and a segment line, a common driving section for driving the common line, a segment driving section for driving the segment line, a power source circuit for generating a driving potential, and a control section for controlling the common driving section, the segment driving section, and the power source circuit. In a case of low temperature, a mode for performing driving control with higher voltage efficiency to set a maximum voltage amplitude is selected. In a case of high temperature, a driving mode that does not use the maximum voltage amplitude is selected. Therefore, a driving means suitable for a bistable nematic dot matrix liquid crystal display is provided.07-28-2011
20120162183Liquid Crystal Display (LCD) and Driving Method Thereof - A liquid crystal display (LCD) and a driving method thereof. The LCD includes: a liquid crystal panel which includes a plurality of pixels formed in intersection areas between a plurality of gate lines and a plurality of data lines, wherein a pair of adjacent pixels share the same data line and are located between a pair of gate lines; a common voltage generator which shifts and outputs a common voltage signal having a polarity, which is reversed one time for a period time and repeated consecutively two time for a ½ period time, for a predetermined time; and a source driver which synchronizes a data signal of a line inversion system with an output timing of the common voltage signal and outputs the data signal to an opposite polarity to a polarity of the common voltage signal to drive the plurality of pixels in a dot inversion system.06-28-2012
20120133637DISPLAY DEVICE AND ELECTRONIC APPARATUS - Disclosed herein is a display device including a pixel array part configured to include scan lines disposed along rows, signal lines disposed along columns, and pixels that are disposed at intersections of the scan lines and the signal lines and arranged in a matrix, each of the pixels having at least a sampling transistor, a drive transistor, a switching transistor, a hold capacitor, and a light-emitting element; and a drive part configured to include a scanner and a driver, the driver supplying a video signal to the signal lines along the columns.05-31-2012
20120133635Liquid Crystal Display Device and Driving Method Thereof - An LCD device and a driving method thereof are disclosed. The LCD device includes a data driver, a detection unit, and a power mode control option generation unit. The data driver controls a consumption power of an output buffer which outputs an image data signal to a liquid crystal display panel. The detection unit detects a low power driving mode interval for driving the data driver at a first consumption power. The power mode control option generation unit transfers a second power mode control option to the data driver during an interval other than the low power driving mode interval, and transfers a first power mode control option to the data driver during the low power driving mode interval.05-31-2012
20120133636LED LIGHTING CIRCUIT AND LIQUID CRYSTAL DISPLAY DEVICE - The present invention discloses an LED lighting circuit that generates a power supply voltage required to light an LED by boosting a power supply voltage. The LED lighting circuit includes a power supply circuit that is formed integrally with the LED lighting circuit and supplies the power supply voltage. The LED lighting circuit further includes a feedback circuit that detects an LED current flowing to the LED and feeds the LED current back to the power supply circuit. The power supply circuit controls the power supply voltage supplied to the LED lighting circuit so that the LED current converges on a target value.05-31-2012
20120133634APPARATUS, SYSTEM, AND METHOD FOR GENERATING A LOW POWER SIGNAL WITH AN OPERATIONAL AMPLIFIER - An amplifier, electronic display system, and a related method for generating a low power signal with an operational amplifier are disclosed herein. An embodiment of the present invention includes an amplifier, comprising an operational amplifier and a voltage converter. The operational amplifier includes an inverting input, a non-inverting input, an output, a first power supply input and a second power supply input, and is configured to generate an output signal in response to an input signal. The voltage is operably coupled with the first power supply input of the operating amplifier, and is configured to receive a first supply voltage and generate a second supply voltage to the first power supply input of the operational amplifier. The voltage of the second supply voltage is relatively closer to the expected operating voltage range of the output signal than is the first supply voltage.05-31-2012
20120313923PIXEL CIRCUIT, DISPLAY DEVICE, ELECTRONIC DEVICE, AND PIXEL CIRCUIT DRIVING METHOD - Disclosed herein is a pixel circuit including: a light emitting element; a storage capacitor; a writing transistor for writing a driving voltage corresponding to a video signal to the storage capacitor; and a driving transistor for driving the light emitting element on a basis of the driving voltage written to the storage capacitor, wherein a characteristic of the writing transistor is controllable in such a manner as to be operatively associated with a process of writing the driving voltage corresponding to the video signal to the storage capacitor.12-13-2012
20120162185METHOD OF DRIVING DISPLAY PANEL AND DISPLAY APPARATUS FOR PERFORMING THE SAME - A method of driving a display panel includes converting a first data enable signal including a first cycle based on a compensation parameter to generate a second data enable signal including a second cycle longer than the first cycle, generating a plurality of gate signals based on the second data enable signal to output the gate signals to a plurality of gate lines of the display panel, and generating a plurality of data voltages based on the first data enable signal to output the data voltages to a plurality of data lines of the display panel.06-28-2012
20120162188SIGNAL PROCESSING DEVICE AND DISPLAY APPARATUS - A signal processing device includes: a switching element for driving supplying a driving current supplied from a power supply section to a light emitting portion; and a cutoff element cutting off the switching element for driving according to a cutoff signal supplied before a threshold voltage adjusting signal for adjusting a threshold voltage of the switching element for driving is supplied to the switching element for driving from a signal line for supplying the threshold voltage adjusting signal.06-28-2012
20120162187GATE DRIVE CIRCUIT AND DISPLAY APPARATUS HAVING THE SAME - A gate drive circuit includes a plurality of driving stages. An n-th (‘n’ is a natural number) driving stage includes a pull-up part, a carry part, a first pull-down part, a first pull-up/down control part and a second pull-up/down control part. The first pull-up/down control part applies a first power signal of an ON voltage to a control terminal of the pull-up part in a forward direction mode, and applies the first power signal of a second OFF voltage to a control terminal of the pull-up part in a reverse direction mode. The second pull-up/down control part applies a second power signal of the second OFF voltage to the control terminal of the pull-up part in the forward direction mode, and applies the second power signal of the ON voltage to the control terminal of the pull-up part in the reverse direction mode.06-28-2012
20120249516Amoled microdisplay device with active temperature control - An active-matrix organic light-emitting diode microdisplay device having a temperature control system including a temperature sensor and a control means for regulating the temperature of the OLED. The temperature is regulated by a bias transistor within the circuit, operating as a function of the temperature of the panel, such that low panel temperatures cause an increase in voltage of the bias transistor which draws a higher current through the top voltage drive transistor for self-heating the area surrounding the OLED.10-04-2012
20120212476PIXEL CIRCUIT AND DISPLAY DEVICE - A display device where low power consumption is realized without lowering aperture ratio is provided. A liquid crystal capacitive element Clc is sandwiched between a pixel electrode 08-23-2012
20120249514Organic light emitting display device, data driving apparatus for organic light emitting display device, and driving method thereof - An organic light emitting display device comprises: a display unit; a power supply unit including a power source which generates a power supply voltage to drive the display unit; a data compensator that adapts a voltage drop, caused by a resistance of power lines supplying the power supply voltage from the power source to a pixel included in the display unit, to a data voltage of the pixel and generates a compensated data voltage of the pixel; and a data driver that applies the compensated data voltage to the display unit.10-04-2012
20120313924DRIVE CIRCUIT AND LIQUID CRYSTAL DISPLAY DEVICE - Provided is a drive circuit including: an image supply section for supplying an image to be displayed on a liquid crystal panel (12-13-2012
20120313922DISPLAY DEVICE, PIXEL CIRCUIT, ELECTRONIC APPARATUS, AND METHOD OF DRIVING DISPLAY DEVICE - A display device includes a display portion, a hold capacitor, a write transistor writing a drive voltage corresponding to a video signal to the hold capacitor, a drive transistor driving the display portion in accordance with the drive voltage written to the hold capacitor, and a pulse width adjusting portion adjusting a width of a pulse signal causing a drive pulse used to drive at least one of the write transistor and the drive transistor so as to correspond to an environmental change.12-13-2012
20120075283PLASMA DISPLAY PANEL DRIVE METHOD AND PLASMA DISPLAY DEVICE - In a driving method for a plasma display panel, in the initializing period in at least one of a plurality of subfields, selective initializing operation is performed that selectively causes initializing discharge only in a discharge cell having undergone address discharge in an immediately preceding address period. The selective initializing operation includes the step of applying first voltage to the sustain electrode and applying an up-ramp waveform voltage to the scan electrode, the step of applying a first down-ramp waveform voltage to the scan electrode and then applying a positive rectangular voltage to it, and the step of applying second voltage higher than the first voltage to the sustain electrode and applying a second down-ramp waveform voltage to the scan electrode.03-29-2012
20120075282DRIVE CIRCUIT FOR DISPLAY PANEL, AND DISPLAY DEVICE - In a unit drive circuit in each stage in a shift register, a transistor which is maintained in ON state during a period where the unit drive circuit in the stage does not perform an outputting operation is configured not to generate Vth shift. As switches, transistors T03-29-2012
20120075281METHOD OF DRIVING A DISPLAY PANEL AND DISPLAY DEVICE - In a method of driving a display panel, a voltage of a first polarity with respect to a reference voltage is outputted to an n-th data line and an (n+1)-th data line (‘n’ is a natural number), respectively, and a voltage of a second polarity with respect to the reference voltage is outputted to an (n+2)-th data line and an (n+3)-th data line, respectively, during an N-th frame (‘N’ is a natural number). Then, a voltage of the first polarity is outputted to the n-th data line, a voltage of the second polarity is outputted to the (n+1)-th data line and the (n+2)-th data line, respectively, and a voltage of the first polarity is outputted to the (n+3)-th data line, during an (N+1)-th frame.03-29-2012
20120075280Display Driving Circuit and Display Driving Circuit - A display driving circuit includes a timing controller, agate driving circuit, a control unit, a boost converter and a level shifter. The timing controller functions to provide a first start pulse. The level shifter generates a second start pulse by level shifting the first start pulse. The gate driving circuit includes a plurality of shift registers coupled in series and is driven by the second start pulse and the level shifter so as to generate gate signals. The control unit uses the second start pulse and a gate signal generated by a kth shift register to switch a high working voltage provided to the level shifter by the boost converter to a suitable range for driving the gate driving circuit.03-29-2012
20120313921STEREOSCOPIC IMAGE GENERATING DEVICE - A stereoscopic image generating device comprising: a display device to include a plurality of pixels which emit brightness and non-brightness-emitting portions in the peripheries of the pixels; a lattice unit to be installed in parallel with a display surface as well as being adjacent to the display surface of the display device and to include a brightness-emitting portion which covers the non-brightness-emitting portions; and an optical unit to be installed in parallel with the lattice unit as well as being adjacent to the lattice unit and to include lens portions which form images of the light coming from the pixels at predetermined image-forming points.12-13-2012
20120249517METHOD OF DRIVING ORGANIC ELECTROLUMINESCENCE EMISSION PORTION - A pixel circuit and driving method are disclosed, wherein the pixel circuit comprises a first transistor, a second transistor, and a capacitor. The first transistor is connected between a power source and a light emission portion, and the second transistor is connected to a data line. The capacitor is initialized according to a potential, and a video signal is applied from the data line to the capacitor through the second transistor. For driving, an initialization voltage is applied to the data line and the video signal is supplied to the data line, with the second transistor being turned ON prior to applying the initialization voltage to the data line.10-04-2012
20100007646Systems, Methods and Media for Disabling Graphic Processing Units - An information handling system (IHS) provides a method for managing power consumption. The method includes detecting a power-on in the IHS, wherein the IHS comprises a first graphics processing unit (GPU) and at least one additional GPU. The method also includes determining if a normal boot is implemented in the IHS and determining if an instant-on boot occurred if the normal boot is implemented. The at least one additional GPU is disabled if an instant-on boot occurred.01-14-2010
20120256897ORGANIC LIGHT EMITTING DIODE DISPLAY HAVING SHORT DETECTING CIRCUIT AND METHOD OF DRIVING THE SAME - An organic light emitting diode display including a short detecting circuit and a method of driving the same are disclosed. The organic light emitting diode display includes a pixel unit including pixels coupled to scan lines and data lines, a DC-DC converter for outputting a first power source and a second power source when a start signal is supplied, a first power source line and a second power source line for supplying the first power source and the second power source output from the DC-DC converter to the pixel unit, and a short detecting circuit for determining whether the first power source line and the second power source line are shorted before the DC-DC converter is driven and for supplying the start signal to the DC-DC converter when the first power source line and the second power source line are not shorted.10-11-2012
20120256899GATE DRIVING CIRCUIT AND DRIVING METHOD THEREOF - A gate driving circuit receives a plurality of clock signals in a sequence and includes a plurality of cascaded drive units sequentially outputting an output signal, wherein a first-stage drive unit of the gate driving circuit receives a scan start signal or a scan end signal while a last-stage drive unit thereof receives a scan end signal or a scan start signal; wherein a driving direction of the gate driving circuit is reversed by reversing the sequence of the clock signals and exchanging the scan start signal and the scan end signal. The present invention further provides a driving method of a gate driving circuit.10-11-2012
20130169614GATE DRIVING CIRCUIT OF DISPLAY PANEL - A gate driving circuit of a display panel is provided. A gate driving voltage is accurately adjusted by the gate driving circuit according to an environmental temperature, given that the characteristics of a thermistor and a hysteresis loop are taken into consideration. Accordingly, the power loss caused by switching states of a display panel can be reduced.07-04-2013
20120188223CHIP ON GLASS TYPE LIQUID CRYSTAL DISPLAY - A chip on glass (COG) type liquid crystal display comprises: a glass substrate (07-26-2012
20120188222DISPLAY DEVICE AND ELECTRONIC SYSTEM UTILIZING THE SAME - A display device including a pixel unit, a selection unit, and a control unit is disclosed. The pixel unit includes a driving transistor and a capacitor. The driving transistor includes a gate and a source. The capacitor is coupled between the gate and the source. The selection unit selectively transmits a first voltage or a second voltage to the driving transistor. The control unit controls the selection unit and receives the voltage of the source.07-26-2012
20090021507DRIVING DEVICE, DISPLAY APPARATUS HAVING THE SAME AND METHOD OF DRIVING THE DISPLAY APPARATUS - A driving device includes an output timing controller which controls an output timing of a first driving voltage and a second driving voltage respectively generated from a first voltage generator and a second voltage generator. A third driving voltage output from the output timing controller is provided to a first data driver and a second data driver, and also provided to a gamma voltage generator to generate a plurality of gamma voltages. Accordingly, a reverse electric potential between the third driving voltage and the gamma voltages is prevented from being generated in the first and second data drivers, therefore, preventing the first and second data drivers from being damaged.01-22-2009
20120081352DISPLAY DEVICE - Potential fluctuation of a common voltage is canceled, and greenish coloring of a screen displayed on a liquid crystal display panel is reduced to provide a high-quality image. A liquid crystal display device includes a liquid crystal display panel having plural pixels in which each of the pixels includes a pixel electrode and a counter electrode. The liquid crystal display device includes a detector circuit that detects a specific image pattern that induces a potential fluctuation of a common voltage applied to the counter electrode, and a VCOM generator circuit that generates the common voltage to be applied to the counter electrode. The VCOM generator circuit applies the common voltage in which an inverse compensation voltage that compensates the potential fluctuation is superimposed on a reference common voltage to the counter electrode on the basis of a detection result of the detector circuit.04-05-2012
20120262442APPARATUS AND METHOD FOR DRIVING MOBILE DISPLAY DEVICE - A mobile display device driving apparatus and method which can reduce power consumption are disclosed. The driving apparatus includes a liquid crystal panel, a battery, a power saving mode signal generator that detects the remaining power of the battery and generates a power saving mode signal based on the detected power to set a power saving mode of the liquid crystal panel. A controller sets a gain value in response to the power saving mode signal, converts external three-color input data into four-color data based on the set gain value and generates a dimming signal in response to the power saving mode signal. A panel driver displays an image based on the four-color data. An inverter generates a lamp drive voltage based on the dimming signal, and a backlight unit generates light in response to the lamp drive voltage and irradiates the generated light to the liquid crystal panel.10-18-2012
20120262439BISTABLE DISPLAY PANEL AND DATA DRIVING CIRCUIT THEREOF - An exemplary data driving circuit for providing a display data voltage to a data line includes a data driving module. The data driving module includes a display data buffer unit and a switching element. The display data buffer unit is used to provide the display data voltage. The switching element is electrically coupled between the display data buffer unit and the data line and determines whether to allow the display data voltage provided by the display data buffer unit to be transmitted to the data line according to a control signal. Furthermore, the control signal controls the switching element to be turned off when the display data voltage provided by the display data buffer unit equals a predetermined voltage. Moreover, a display panel using the above data driving circuit also is provided.10-18-2012
20120262440Liquid Crystal Display and Method for Driving Same - An exemplary liquid crystal display device includes a liquid crystal panel, a common voltage generator and a scanning voltage regenerator. The liquid crystal panel includes a plurality of pixel regions formed in a matrix form. Each pixel region includes a thin-film transistor and a storage capacitor. The storage capacitor includes a pixel electrode and a storage electrode facing the pixel electrode. The common voltage generator is configured for providing a common voltage to the storage electrode. The scanning voltage regenerator is configured for receiving a feedback common voltage from the storage electrode and generating a regenerated scanning voltage for driving the thin-film transistor according to the feedback common voltage.10-18-2012
20120229443ELECTRONIC APPARATUS SYSTEM - An electronic apparatus system is provided. The electronic apparatus system includes a register, a display mode computation unit, a display device and a control circuit. The register stores image information having a data input refresh frequency. The display mode computation unit generates a display mode control signal by computation based on an image characteristic categorization of the image information. The display device includes a display panel having a plurality of pixel units. The control circuit controls a display mode and a drive mode of the display panel according to the display mode control to signal to further adjust a display refresh frequency of the display panel.09-13-2012
20120229441LIQUID CRYSTAL DISPLAY PANEL - A liquid crystal display (LCD) panel includes a plurality of scan lines, a plurality of data lines, a plurality of common electrode lines, a plurality of pixel units, and at least one voltage regulating chip. The pixel units are coupled to the corresponding scan lines, the corresponding data lines, and the corresponding common electrode lines, respectively. The voltage regulating chip is coupled to a regulated voltage and the common electrode lines, so as to provide a regulated current to each of the common electrode lines based on the regulated voltage, respectively.09-13-2012
20100328298DISPLAY DEVICE - A display device is characterized by including a first storage section (12-30-2010
20100328297PIXEL DRIVE APPARATUS, LIGHT EMITTING APPARATUS, AND DRIVE CONTROL METHOD FOR THE LIGHT EMITTING APPARATUS - An offset voltage generating circuit sets an offset voltage through binary search based on a voltage value of the initial voltage, and a voltage controlling circuit generates an output voltage which is a predetermined gradation voltage added with the offset voltage, and applies a voltage based on the output voltage to a control terminal of a drive transistor. A current comparison circuit applies a supply voltage from a power supply to the other end of current path of the drive transistor. The current comparison circuit compares the current value of a reference current corresponding to the gradation voltage with a current value of the current flowing in the current path of the drive transistor at this time. The offset voltage generating circuit acquires a specific offset voltage corresponding to variation of the characteristic of the drive transistor based on a result of comparison performed by the current comparison circuit.12-30-2010
20080297499LCD POWER SUPPLY - An LCD (liquid crystal display) power supply includes an AC to DC converter circuit, a transformer, a DC to AC converter, and a feedback circuit. The AC to DC converter circuit couples an AC power supply to generate a DC signal. The DC to AC converter couples the DC signal to a primary side of the transformer and alternates polarities thereof so that an AC signal is generated on a secondary side of the transformer to supply for a load. The feedback circuit receives a first feedback signal indicative of power being supplied to the load and modulates the DC signal generated by the AC to DC converter circuit according to the first feedback signal.12-04-2008
20100182305LCD with the function of eliminating the power-off residual images - An LCD includes a PWB, a FPC, and a display panel. The PWB includes a level shift circuit and a power-off discharge circuit. The display panel includes a gate driving circuit and a TFT array. The power-off discharge circuit can electrically connects a gate high voltage end to a gate low voltage end so as to drive the gate driving circuit to turn on all TFTs of the TFT array.07-22-2010
20120262441DISPLAY DEVICE - A display device includes a driving circuit that applies an active potential which is a potential for turning on pixel transistors sequentially to a plurality of output signal lines, wherein the driving circuit includes a main driving circuit that outputs the active potential to one end of the output signal line of the plurality of output signal lines by applying a clock signal caused by a input of the active potential output from the upper output signal line, and an auxiliary driving circuit that has an auxiliary transistor which is a transistor where the other end of the output signal line is connected to a signal line for the clock signal via the source or the drain. Thereby, output waveform distortion in the scanning signal line can be improved and thus display quality can be enhanced.10-18-2012
20120320029IMAGE DISPLAY DEVICE - An image display device and method of driving an image display device with alternative repeating of an emission period during which the light emitting element is made to emit light and a non-emission period during which light emission of the light emitting element is stopped. The terminal voltage of a storage capacitor is set to the voltage of a signal line, whereby light emission luminance of the light emitting element in a next emission period is set.12-20-2012
20110007061DISPLAY DEVICE - A gate signal line drive circuit and a display device which realize the suppression of a threshold voltage of an element which is used for a long time are provided. With respect to elements to which a HIGH voltage is applied for a long time, a plurality of elements are connected parallel to each other and are controlled such that at least any one of the plurality of elements is driven by a switching element, and a period during which the element is not driven is set longer than a frame display period.01-13-2011
20120327066DISPLAY DEVICE AND METHOD OF DRIVING THE SAME - A display device includes an organic EL display unit including plural pixels, a variable-voltage source which supplies a positive electrode supply potential and a negative electrode supply potential to the display organic EL display unit, and an arithmetic circuit which measures an anode potential and a cathode potential of a representative pixel. The variable-voltage source regulates the positive electrode supply potential with respect to the negative electrode supply potential, according to at least the potential difference between the negative electrode supply potential of the variable-voltage source and the cathode potential of the representative pixel, and supply the regulated positive electrode supply potential to the organic EL display unit.12-27-2012
20120327065Organic Light Emitting Diode Display and Method of Driving the Same - An OLED display includes a data line, a gate line crossing the data line receiving a scan pulse, a high potential (HP) driving voltage (DV) source, a low potential (LP) DV source, a light emitting element (LEE) emitting light from current flowing between the HP DV source and the LP DV source, a drive element (DE) connected between the HP DV source and the LEE controlling a current flowing in the LEE from voltage between a gate electrode (GE) and a source electrode (SE) of the DE, and a driving current stabilization circuit applying a voltage to the GE of the DE turning on the DE and sinking a reference current through the DE, setting a source voltage of the DE at a sensing voltage and modifying voltage between the GE and SE of the DE to scale a current to be applied to the LEE from the reference current.12-27-2012
20120327064AMOLED PANEL AND DRIVING CIRCUIT AND METHOD THEREFOR - Embodiments of the present disclosure relates to an active matrix organic light emitting diode (AMOLED) panel and the driving circuit and method therefor. The driving circuit of the AMOLED panel comprises: a driving transistor; a first transistor; a second capacitor; an organic light emitting diode; a voltage adjustment module, which is connected to a first control signal terminal, a second control signal terminal and a high level signal terminal, and is connected with the second capacitor, the driving transistor and the first transistor, for adjusting a gate-source voltage of the driving transistor connected with the second capacitor, such that a driving current of the driving transistor in a saturation status is independent of its threshold voltage.12-27-2012
20120327063DISPLAY DEVICE AND METHOD OF DRIVING THE SAME - Display device includes: a power supplying unit which outputs at least a high-side or low-side output potential; an organic EL display unit which includes pixels and receives power supply from the power supplying unit; two or more detecting lines for transmitting a high-side or low-side applied potential applied to two or more pixels; a relay unit which outputs the high-side or low-side applied potentials transmitted by the detecting lines, to output lines fewer in number than the detecting lines; and a regulating unit which regulates at least the high-side or low-side output potential to be outputted by the power supplying unit, such that any one of potential difference between a reference potential and the high-side applied potential from the relay unit, potential difference between the reference potential and the low-side applied potential, and potential difference between the high-side applied potential and the low-side applied potential reaches a predetermined potential difference.12-27-2012
20110037756APPARATUS FOR SUPPLYING POWER SOURCE - The present invention relates to an apparatus for supplying power source for providing certain voltage to a first display device and a second display device. The apparatus for supplying power source includes a boosting circuit, a boosted voltage detecting circuit and an output selecting circuit. The boosting circuit boosts a battery voltage. The boosted voltage detecting circuit detects the boosted battery voltage, and transmits the detection result to the boosting circuit. The output selecting circuit is coupled to the boosting circuit and the boosted voltage detecting circuit, and provides selectively the boosted battery voltage to a first display device and a second display device. The apparatus provides certain voltage to a first display device and/or a second display device, and thus the size of a dual panel apparatus employing the display devices may be reduced.02-17-2011
20120320027LIQUID CRYSTAL DISPLAY DEVICE - Disclosed is a liquid crystal display device that can convert a bright spot easily into a black spot. The liquid crystal display device is provided with; a drive circuit board on which an IC chip (12-20-2012
20120268446PIXEL CIRCUIT AND DISPLAY DEVICE - A display device which realizes a multi-gradation constant display with low power consumption is provided. A pixel circuit 10-25-2012
20120268448CONNECTION DIAGNOSTIC DEVICE AND CONNECTION DIAGNOSTIC METHOD FOR A DISPLAY - An electronic device comprising a liquid crystal display and a control board, the electrical tracks of the board and of the display being connected by a connector, the control board including a microcontroller able to apply an electrical voltage to at least one connection terminal in order to display given information on the display, characterised by the fact that the control board includes a diagnostic device which is designed to generate a voltage pulse at connection terminals and to measure the resulting electrical voltage in order to determine the state of the connection between the display and the board as a function of the value of the measured electrical voltage.10-25-2012
20120268447DISPLAY ELEMENT AND ELECTRICAL DEVICE USING THE SAME - A display element (10-25-2012
20120268445IMAGE DISPLAY DEVICE, PANEL AND PANEL MANUFACTURING METHOD - Provided are an image display device in which a desired number of panels are combined so that a large light-emitting surface is realized, a panel provided in the image display device, and a method for manufacturing the panel. For this purpose, a panel (10-25-2012
20120268444LIQUID CRYSTAL DISPLAY DEVICE, POLARITY REVERSING METHOD, PROGRAM, AND RECORDING MEDIUM - A liquid crystal display device includes a polarity reversal control section for controlling a source voltage application section so as to make a transition from (i) a state in which voltages each having a first polarity are applied to respective electrodes of all pixels of a liquid crystal display panel to (ii) a state in which voltages each having a second polarity, which is opposite to the first polarity, are applied to the respective electrodes of all the pixels, the transition being made while more than one of the plurality of frame images are displayed in turn on the liquid crystal display panel. This allows prevention of occurrence of flicker and of an increase in power consumption.10-25-2012
20120268443Pixel Structure and Forming Method and Driving Method Thereof - A method for driving a pixel electrode disposed on a first substrate operates by providing a voltage corresponding to a displaying data to the pixel electrode and a control electrode, such that the pixel electrode and the control electrode are at a floating connection state; providing a first coupling voltage to a coupling electrode; and coupling a variation of a first coupling voltage to the control electrode via at least one coupling capacitor, such that an absolute value of a voltage difference between the control electrode and a common electrode substantially greater than an absolute value of a voltage difference between the pixel electrode and the common electrode, wherein the common electrode is disposed on a second substrate and the second substrate is corresponding to the first substrate.10-25-2012
20120320028LIQUID CRYSTAL DISPLAY ELEMENT AND PIXEL STRUCTURE - A pixel structure of liquid crystal display includes a first and a second sub-pixel electrodes, a first and a second data lines, a gate line, and a first and a second transistors. The first and the second sub-pixel electrodes disposed in the first and second sub-pixel areas respectively include at least two display domains at left and right. The first data line is disposed under the interface between two domains of each of the first and second sub-pixel electrodes, and the second data line is disposed under the edges of the first and second sub-pixel electrodes. The gate line is disposed between the first and second sub-pixel areas. The first sub-pixel electrode is controlled by the gate line and the first data line through the first transistor. The second sub-pixel electrode is controlled by the gate line and the second data line through the second transistor.12-20-2012
20120127150Organic Light Emitting Diode Display Device and Method for Driving the Same - The present invention an organic light emitting diode display device includes a display panel having a plurality of pixel regions, a gate driving unit for driving gate lines and light emitting control lines of the display panel, a data driving unit for driving data lines of the display panel, a power supply unit for supplying first and second power signals to power lines of the display panel as well as a compensating voltage to a compensating power line, and a timing controller for controlling the gate and data driving units for displaying an image with a data voltage compensated with the compensating voltage and controlling the power supply unit to supply the compensating voltage after converting a level of the compensating voltage just before display of a first image on the display panel at an initial driving.05-24-2012
20120320023LED DRIVING SYSTEM AND DISPLAY DEVICE USING THE SAME - A light emitting diode (LED) driving system driving a LED array of a display device includes a converter circuit, a pulse width modulator (PWM) controller, a 2D parameter circuit, a 3D parameter circuit and a microcontroller. The 3D parameter circuit outputs 3D parameter control signals when the display device is in a 3D mode, and stops from generating the 3D parameter control signals when the display device is in a 2D mode. The PWM controller outputs PWM signals to control the converter circuit according to outputs of the 2D parameter circuit and the 3D parameter circuit.12-20-2012
20100231577OUTPUT VOLTAGE AMPLIFIER AND DRIVING DEVICE OF LIQUID CRYSTAL DISPLAY USING THE SAME - An output voltage amplifier, and a driving device of a liquid crystal display using the same are disclosed. The output voltage amplifier includes: an amplifying unit to generate first and second signals corresponding to a gray voltage input to a first input terminal and a feedback signal input to a second input terminal, and to output a first voltage by using first and second switches driven to be on or off according to the first and second signals; an output unit to apply the first and second data signals to the first and second pixels by using third and fourth switches turned on or off according to the first and second signals; and a feedback circuit unit to selectively supply one of the first voltage and the first and second data signals to the second input terminal. Heating characteristics and a slew rate can be improved.09-16-2010
20100231576DIGITAL PHOTO FRAME WITH MIRROR FUNCTION - A digital photo frame (DPF) includes a power management unit, a display panel, a backlight unit, an image capturing unit and a processing unit. The display panel includes a reflective structure. The power management unit is used to manage the power supply from a power source to the DPF. The backlight unit connects with the display panel and the power management unit. The image capturing unit is used to capture images of objects around the DPF and produce a detection signal when the image includes a face of a person. The processing unit connects with the image capturing unit and the power management unit, the processing unit controls the power management unit to discontinue the power from the power source to the backlight unit when receiving the detection signal, therefore the display panel reflects images via the reflective structure.09-16-2010
20120320026LIQUID CRYSTAL DISPLAY DEVICE - A color display pixel P12-20-2012
20120327068DISPLAY APPARATUS AND DRIVE METHOD - If areas corresponding to the address electrodes in the second row have an area to be stereoscopic display and an area not to be stereoscopic display and an area of the connecting wire of the far electrode corresponding to the area to be stereoscopic display in the second column is included in the area not to be stereoscopic display in the first column, then a third address voltage obtained by inverting the first address voltage in positive-negative polarity is applied to the address electrodes in the second row, a third column voltage obtained by inverting the first column voltage in positive-negative polarity is applied to the far electrode corresponding to the area to be stereoscopic display, and a fourth column voltage obtained by inverting the second column voltage in positive-negative polarity is applied to the far electrode corresponding to the area not to be stereoscopic display.12-27-2012
20120139894VOLTAGE-PROGRAMMING SCHEME FOR CURRENT-DRIVEN AMOLED DISPLAYS - A system and method for driving an AMOLED display is provided. The AMOLED display includes a plurality of pixel circuits. A voltage-programming scheme, a current-programming scheme or a combination thereof is applied to drive the display. Threshold shift information, and/or voltage necessary to obtain hybrid driving circuit may be acquired. A data sampling may be implemented to acquire a current/voltage relationship. A feedback operation may be implemented to correct the brightness of the pixel.06-07-2012
20120320025DISPLAY DEVICE AND ELECTRONIC APPARATUS - A display device includes: a liquid crystal display panel; and a driver circuit that drives the liquid crystal display panel. The liquid crystal display panel includes a liquid crystal layer, pixel electrodes provided in a region facing the liquid crystal layer and which apply a voltage thereto, and a phase difference layer and a polarizing plate each provided on a side, relative to the liquid crystal layer, which ambient light enters. Each of the pixel electrodes includes a plurality of partial electrodes, and the driver circuit selects one or more partial electrodes from the partial electrodes to which a constant voltage is to be applied in accordance with an image signal. The constant voltage causes the liquid crystal display panel to be in a white state. The driver circuit performs gray-scale display by modulating lighting area of each pixel at a frame rate of less than 60 Hz.12-20-2012
20120327067DISPLAY DEVICE AND METHOD FOR DRIVING DISPLAY DEVICE - A display device according to the present disclosure includes: an organic EL display unit having pixels; a variable voltage source which supplies a voltage to the organic EL display unit; and a voltage drop amount calculating circuit which regulates the voltage output by the variable voltage source, according to video data, in which the organic EL display unit further includes an anode-side power source line network and a cathode-side power source line network connected to the pixels and the variable voltage source, for supplying the voltage from the variable voltage source, and the voltage drop amount calculating circuit estimates, from the video data, a distribution of voltage drop amount in the anode-side power source line network and the cathode-side power source line network for each of the pixels, and regulates the voltage based on the estimated distribution of voltage drop amount for each of the pixels.12-27-2012
20110279435DISPLAY DEVICE AND DISPLAYING METHOD THEREOF, AND DRIVING CIRCUIT FOR CURRENT-DRIVEN DEVICE - The present invention provides a display device, a displaying method thereof and a driving circuit for current-driven device. Each pixel of the display device includes a current-driven device and a driving circuit. A first terminal of the current-driven device is electrically coupled to a first preset voltage. The driving circuit includes a switch module and a capacitor. The switch module is electrically coupled to a data signal, a second terminal of the current-driven device and a second preset voltage. The switch module is for determining whether a current is allowed to flow through the current-driven device and setting a value of the current according to the data signal. The capacitor is electrically coupled between a periodically changed resetting signal and the switch module, to couple the resetting signal into the switch module to reset a voltage at a connection node between the capacitor and the switch module.11-17-2011
20120320024DISPLAY DEVICE - A display device according to the present disclosure includes: a variable-voltage source which outputs a high-side output potential and a low-side output potential; an organic electroluminescence (EL) display unit in which a plurality of pixels are arranged; a potential difference detecting circuit which detects a high-side potential of a first pixel and a low-side potential of a second pixel; and a signal processing circuit which regulates at least one of the high-side output potential and the low-side output potential outputted from the variable-voltage source such that a potential difference between the high-side potential of the first pixel and the low-side potential of the second pixel reaches a predetermined potential difference.12-20-2012
20120327069DISPLAY DEVICE - According to one embodiment, a display device includes a light source, a light guide, a light extraction unit, and a drive circuit. The light source emits a first light. The light guide has a first end, a second end arranged in a first direction, and a side surface extending in the first direction. The light guide guides the first light from the first end toward the second end. The light extraction unit opposes the side surface, and includes first and second conductive units provided parallel to the side surface. The light extraction unit extracts the first light guided inside the light guide by coming close to the side surface for a state in which a voltage is applied to the first and second conductive units. The drive circuit applies the voltage between the first and second conductive units.12-27-2012
20120327062ELECTRONIC APPARATUS, CONTROL METHOD OF ELECTRONIC APPARATUS, AND NON-TRANSITORY COMPUTER-READABLE MEDIUM STORING COMPUTER EXECUTABLE CONTROL PROGRAM OF ELECTRONIC APPARATUS - According to one embodiment, an electronic apparatus includes: a storage module which stores display information of a work screen that is displayed on an image display module according to an instruction to switch to a standby state; a power supply module which receives a resume instruction in the standby state, and which supplies power to the image display module according to the resume instruction; and a work screen display module which displays an image on the power-supplied image display module using display information of the work screen stored in the storage module.12-27-2012
20120287108DISPLAY DEVICE - A display device includes a display panel configured to display an image in an upward direction and a reflective panel on the display panel, the reflective panel configured to selectively transmit or reflect light with respect to an area corresponding to the image.11-15-2012
20120287109DATA DRIVER AND DISPLAY MODULE USING THE SAME - A data driver and a display module using the same are provided. The data driver includes a data line driving circuit and a power control circuit. The data line driving circuit drives data lines of the display module. The power control circuit controls an external power generating circuit connected to the data driver to generate a scan voltage for a scan driver of the display module.11-15-2012
20120287107LIQUID CRYSTAL DISPLAY - This invention discloses an LCD which includes an LCD panel and a pixel voltage adjuster. The LCD panel includes a plurality of pixel units which are arranged in the way of a matrix. Each pixel unit is provided with a liquid crystal capacitor. The liquid crystal capacitor includes a pixel electrode and a common electrode oppositely arranged. The pixel voltage adjuster receives a feedback common voltage from the common electrode and adjusts the voltage of the pixel electrode in terms of the feedback common voltage. The LCD provided in this invention can reduce cross-noise and improve the display quality of the LCD.11-15-2012
20120287111PLASMA DISPLAY DEVICE AND PLASMA DISPLAY PANEL DRIVING METHOD - Image display quality of a plasma display apparatus is enhanced. For this purpose, the plasma display apparatus includes a number-of-sustain-pulses corrector for controlling the number of sustain pulses to be generated. The number-of-sustain-pulses corrector includes an all-cell light-emitting rate detection circuit (11-15-2012
20120139892LIQUID CRYSTAL DISPLAY - A liquid crystal display is provided comprising an LCD panel including data lines formed along a column direction, gate lines formed along a row direction perpendicular to the column direction, and a plurality of pixels arranged in a matrix pattern at intersections of the data lines and the gate lines, a data driver that supplies data voltages to the data lines, and a gate driver that sequentially supplies gate pulses to the gate lines. Subpixels of each of the pixels share one data line through which a data voltage is sequentially charged to the subpixels in a time-division manner. A column-directional length of each of the subpixels is longer than a row-directional length of each of the subpixels.06-07-2012
20130009939DISPLAY DEVICE - A display device according to the present disclosure includes: a variable-voltage source supplying power source voltage; an organic EL display unit including power lines on high-potential side and low-potential side that are connected to pixels; a potential difference detecting circuit detecting a potential on the high-potential side of a monitor pixel; a voltage drop amount calculating circuit calculating an amount of voltage drop generated in the power line on the low-potential side from video data and estimating a potential at, at least one point of the power line on the low-potential side; and a signal processing circuit regulating power source voltage to be supplied from the variable voltage source such that a potential difference between the potential on the high-potential side detected by the potential difference detecting circuit and the potential on the low-potential side estimated by the voltage drop amount calculating circuit reaches a predetermined potential difference.01-10-2013
20130009941IMAGE DISPLAY DEVICE - An image display device includes a display panel which includes a plurality of pixels and operates in a 2D mode and a 3D mode, a patterned retarder for dividing light from the display panel into first polarized light and second polarized light, and a control voltage generator which generates a first DC control voltage of an off-level and a second DC control voltage of a slight-on level, which is higher than the off-level and is lower than a full-on level, and selectively outputs the first DC control voltage and the second DC control voltage depending on a driving mode. Each of the plurality of pixels includes an upper display unit and a lower display unit, which are vertically disposed in a mirror form.01-10-2013
20130016086DISPLAY DEVICE - A display device includes: a variable-voltage source which supplies at least a potential on a high-potential side or on a low-potential side; an organic EL display unit including a plurality of pixels; a potential difference detecting circuit which detects potentials on pixels; and a signal processing circuit which regulates an output potential from the variable-voltage source such that a potential difference between the potential at the pixel and a reference potential reaches a predetermined potential difference, in which resistance of a power wire at each part between adjacent pixels along a first direction is higher than resistance of a power wire at each part between adjacent pixels along a second direction, and an average distance between adjacent potential detecting points along the first direction is shorter than an average distance between adjacent potential detecting points along the second direction.01-17-2013
20130016089IMAGE DISPLAY DEVICEAANM Kim; JooahAACI SeoulAACO KRAAGP Kim; Jooah Seoul KRAANM Hwang; KwangjoAACI Anyang-siAACO KRAAGP Hwang; Kwangjo Anyang-si KRAANM Kim; EuitaeAACI Goyang-siAACO KRAAGP Kim; Euitae Goyang-si KRAANM Park; JoonyoungAACI Paju-siAACO KRAAGP Park; Joonyoung Paju-si KRAANM Baek; SeunghoAACI Paju-siAACO KRAAGP Baek; Seungho Paju-si KRAANM Kim; JeongkiAACI Paju-siAACO KRAAGP Kim; Jeongki Paju-si KR - An image display device includes a display panel which selectively displays a 2D image and a 3D image and includes a plurality of pixels, a patterned retarder for dividing light from the display panel into first polarized light and second polarized light, and a control voltage generation circuit which generates a 2D control voltage at an off-level and generates a 3D control voltage alternately having a slight-on level and the off-level every predetermined period of time. The slight-on level is higher than the off-level and is lower than a full-on level. Each pixel includes a main display unit including a first pixel electrode and a first common electrode and a subsidiary display unit including a second pixel electrode, a second common electrode, and a discharge control switch.01-17-2013
20130016085COMMON VOLTAGE DRIVING METHOD, COMMON VOLTAGE CONTROL APPARATUS, AND DISPLAY DRIVING CIRCUITAANM Wu; Tse-HungAACI New Taipei CityAACO TWAAGP Wu; Tse-Hung New Taipei City TW - A multiple common voltage driving method adapted for a display is provided. The driving method includes following steps: taking a common-voltage switching time unit as a repeating time unit to provide a common voltage to define a reference voltage of the display. The common-voltage switching time unit has a plurality of different types of common-voltage pattern periods. A time length of each of the common-voltage pattern periods includes at least one frame. During the different types of the common-voltage pattern periods, the provided common voltage has different AC voltage swings or different DC voltage levels.01-17-2013
20130016088IMAGE PIXEL AND IMAGE PIXEL CONTROL METHODAANM LEE; Woong HeeAACI IcheonAACO KRAAGP LEE; Woong Hee Icheon KR - An image pixel control method includes: performing an initialization process comprising initializing the light receiving unit; performing an excess value sampling process comprising sampling a voltage level corresponding to a quantity of photoelectrons in excess of a photoelectron accommodation capacity of the light receiving unit; performing an initialization level comprising sampling process sampling a voltage level applied to the light receiving unit when the light receiving unit is initialized; and performing a data level sampling process comprising sampling a voltage level corresponding to a quantity of photoelectrons accommodated in the light receiving unit.01-17-2013
20130016087AMPLIFIER, LIQUID CRYSTAL DISPLAYING DRIVING CIRCUIT AND LIQUID CRYSTAL DISPLAY APPARATUSAANM Kishikawa; TeisukeAACI FukuokaAACO JPAAGP Kishikawa; Teisuke Fukuoka JP - Disclosed herein is an amplifier including a voltage follower circuit having differential input terminals and an output terminal fed back to a first one of the differential input terminals, the voltage follower circuit being configured to amplify an input signal inputted to a second one of the differential input terminals and output the amplified signal from the output terminal; a first current source configured to supply a predetermined current to the voltage follower circuit; and a second current source configured to supply current to the voltage follower circuit when a potential difference between the second one of the differential input terminals and the output terminal is equal to or higher than a predetermined value.01-17-2013
20120146987SIGNAL TRANSMITTING ASSEMBLY FOR CUTTING OFF DRIVING SIGNAL FOR DRIVING DESIGNATED LIGHT SOURCE AND ELECTRONIC APPARATUS HAVING THE SAME - A signal transmitting circuit is provided for cutting off or outputting at least one driving signal for driving a designated light source. The signal transmitting circuit includes an input differential signaling driver, an output differential amplifier, and a fixed-voltage-level-difference supply device. The input differential signaling driver is for receiving a display signal, and outputting an inverting signal and a non-inverting signal according to the display signal. The output differential amplifier is for receiving the inverting signal and non-inverting signal and outputting or cutting off the driving signal according to the voltage-level difference between the inverting signal and the non-inverting signal. The fixed-voltage-level-difference supply device is for supplying a fixed-voltage-level difference to replace the inverting signal and the non-inverting signal received by the output differential amplifier; therefore the output of the output differential amplifier remains low voltage-level to cut off the output of light with a designated color.06-14-2012
20110157144PIXEL AND ORGANIC LIGHT EMITTING DISPLAY DEVICE USING THE SAME - A pixel of a display with reduced leakage current is disclosed. The pixel includes: an organic light emitting diode; a first transistor for controlling an amount of current flowing from a first power source to a second power source via the organic light emitting diode; a storage capacitor coupled between the first power source and a gate electrode of the first transistor; a plurality of third transistors coupled between the gate electrode and a second electrode of the first transistor; and a plurality of fourth transistors coupled between the gate electrode of the first transistor and an initialization power source. The third and fourth transistors are configured to reduce a leakage current from the storage capacitor to improve the image quality of the display.06-30-2011
20110157142DATA TRANSMITTING DEVICE AND FLAT PLATE DISPLAY USING THE SAME - A data transmitting device and a flat plate display using the same are disclosed. The data transmitting device includes a current generator comprising a plurality of constant current sources connected in parallel and a plurality of switches connected to output terminals of the constant current sources, respectively, the current generator configured to switch the switches independently according to a preset digital current control signal and adding up the currents supplied from the constant current sources via the tuned-on switches to output; a current amplifier configured to amplify and output the output current of the current generator; and a line driver configured to generate and output a low voltage differential signal according to input data by using a constant current such as the amplified current of the current amplifier.06-30-2011
20130021316LIGHT-EMITTING DEVICE - A light-emitting device in which variation in luminance of pixels is suppressed. A light-emitting device includes at least a transistor, a first wiring, a second wiring, a first switch, a second switch, a third switch, a fourth switch, a capacitor, and a light-emitting element. The first wiring and a first electrode of the capacitor are electrically connected to each other through the first switch. A second electrode of the capacitor is connected to a first terminal of the transistor. The second wiring and a gate of the transistor are electrically connected to each other through the second switch. The first electrode of the capacitor and the gate of the transistor are electrically connected to each other through the third switch. The first terminal of the transistor and an anode of the light-emitting element are electrically connected to each other through the fourth switch.01-24-2013
20130021318METHOD FOR DRIVING PLASMA DISPLAY PANEL AND PLASMA DISPLAY DEVICE - In display of an image on a plasma display panel, the contrast of the display image is enhanced. For this purpose, the voltage obtained by subtracting the voltage applied to the data electrode from the low-side voltage of the sustain pulses applied to the scan electrode in the sustain period is defined as a first voltage. The voltage obtained by subtracting the voltage applied to the data electrode from the high-side voltage of the sustain pulses applied to the scan electrode is defined as a second voltage. The voltage obtained by subtracting the low-side voltage of the address pulse applied to the data electrode from the low-side voltage of the scan pulse applied to the scan electrode in the address period is defined as a third voltage. Based on these definitions, the voltage applied to each electrode is set so as to satisfy the conditions that: the voltage obtained by subtracting the third voltage from the first voltage is equal to or higher than the discharge start voltage between the data electrode as an anode and the scan electrode as a cathode; and the voltage obtained by subtracting the third voltage from the second voltage is equal to or lower than the sum of the discharge start voltage between the data electrode as an anode and the scan electrode as a cathode and the discharge start voltage between the data electrode as a cathode and the scan electrode as an anode.01-24-2013
20130021313METHODS AND DEVICES FOR VOLTAGE REDUCTION FOR ACTIVE MATRIX DISPLAYS USING VARIABILITY OF PIXEL DEVICE CAPACITANCE - Methods and devices for reducing the voltage required to update an array of display elements having variable capacitance are described herein. In one implementation, the method includes driving a display element to a first state using a reset drive line. The method further includes driving the display element to a second state using a column drive line. The capacitance of the display element is higher in the first state than in the second state01-24-2013
20130021315LCD DEVICE AND SIGNAL DRIVING METHOD THEREOF - The present invention discloses an LCD device. The LCD device employs pre-charging within a frame accompanying high and low levels signal of array common lines. Each pixel is charged a high voltage before writing into a correct data signal, that is, the over driving is performed before the correct data signal is written into the pixel. The present invention also discloses a signal driving method for the LCD device. Compared with the prior art, the frame buffer is not required in the present invention on one hand; the over driving can be performed without complex timing functions on another hand; and the incorrect twist angles of the liquid crystals which are driven instantaneously can be significantly avoided when using the conventional over driving by a look-up table for comparing two sequential image signals.01-24-2013
20130021314CHARGE RECYCLING DEVICE AND PANEL DRIVING APPARATUS AND DRIVING METHOD USING THE SAME - A charge recycling device for a panel display apparatus is disclosed. The charge recycling device includes one or more storage capacitors, and one or more switch modules coupled to the one or more storage capacitors and coupled to a plurality of load capacitors via a plurality of source driving nodes, for controlling currents between the plurality of load capacitors and the one or more storage capacitors. During a charge recycling period, the one or more switch modules are arranged to recycle charges stored in the plurality of load capacitors to the one or more storage capacitors. During a charge reutilization period, the one or more switch modules are arranged to redistribute the recycled charges to the plurality of load capacitors.01-24-2013
20120242645METHOD AND APPARATUS FOR DRIVING A DIELECTRIC ELASTOMER MATRIX AVOIDING CROSSTALK - A method for driving a matrix of elements responding to the absolute value of the activation voltage avoiding crosstalk, the matrix (09-27-2012
20120242644FRAME MAINTAINING CIRCUIT AND FRAME MAINTAINING METHOD - A frame maintaining circuit including a detection circuit and a display control circuit is provided. The detection circuit detects an unusual status to output a status feedback signal. The display control circuit maintains a frame displayed by a display apparatus according to the status feedback signal until the unusual status ceases.09-27-2012
20120242642DRIVING METHOD, CONTROL DEVICE, DISPLAY DEVICE, AND ELECTRONIC APPARATUS - A driving method of an electro-optic device includes determining which condition is satisfied among a plurality of conditions including a first condition where a plurality of pixels include only a first pixels of which an optical state is changed from a second optical state to a first optical state and a third pixels of which the optical state is not changed, a second condition where the plurality of pixels include only a second pixels of which the optical state is changed from the first optical state to the second optical state and the third pixels, and a third condition where the plurality of pixels include both the first pixels and the second pixels, based on data stored in a memory storing the data indicating the optical state of the plurality of pixels.09-27-2012
20120242641Display device and method of operating the same - Embodiments may disclose a display device which includes a display panel including a display pixel displaying an image in response to a common voltage and a data voltage and a sensing pixel outputting a feedback voltage in response to the common voltage and a reference voltage; and a driving circuit unit supplying the data voltage and the reference voltage to the display pixel and the sensing pixel, respectively. The driving circuit unit includes a common voltage estimating part comparing the reference voltage and the feedback voltage to generate a counter signal having a counter value that is stepwise varied according to the comparing of the reference voltage and the feedback voltage; and a common voltage adjusting part stepwise varying the common voltage supplied to the display panel in response to the counter value.09-27-2012
20100073351Ultra-Low-Power Display Control Circuit and Associated Method - An ultra-low-power display control circuit and associated method is provided. The ultra-low-power display control circuit comprises a power conversion controller, a first capacitor, a transforming device, a second capacitor, a regulator, an opto-coupler and a display controller. The first capacitor couples to the power conversion controller and the transforming device. The transforming device converts the relatively-high voltage to a relatively-low voltage. The second capacitor stabilizes the relatively-low voltage. The regulator regulates the relatively-low voltage to generate a regulated voltage output. The display controller is powered by the regulated voltage output. The display controller controls the magnitude of a coupling current of the opto-coupler to activate or deactivate the power conversion controller03-25-2010
20080231625Display apparatus and drive method thereof and electronic device - Disclosed herein is a display apparatus including a pixel array section and a drive section. The pixel array section has power supply lines, scan lines arranged in row, signal lines arranged in column, and pixels arranged in matrix at intersections of each of the scan lines and each of the signal lines. The drive transistor is connected at one of a pair of current terminals to the light emitting device and at the other of the pair of current terminals to the power supply line. The drive section supplies a control signal to each scan line and a video signal to each signal line to drive each pixel, executing a threshold voltage correcting operation, a write operation, and a light emitting operation.09-25-2008
20130169613OVERDRIVE APPARATUS FOR DYNAMICALLY LOADING REQUIRED OVERDRIVE LOOK-UP TABLES INTO TABLE STORAGE DEVICES AND RELATED OVERDRIVE METHOD THEREOF - An overdrive apparatus includes a data storage device, a plurality of table storage devices, and a table access interface. The data storage device is arranged for storing a plurality of overdrive look-up tables corresponding to a plurality of first display regions included in a display area of a display apparatus. The table storage devices are arranged for storing a plurality of selected overdrive look-up tables, respectively. The table access interface is coupled between the data storage device and the table storage devices, and arranged for loading the selected overdrive look-up tables selected from the overdrive look-up tables stored in the data storage device into the table storage devices. The number of the table storage devices is smaller than the number of the display regions.07-04-2013
20130169615LIQUID CRYSTAL DISPLAY DEVICE - A liquid crystal display device includes: a liquid crystal display unit that displays, for each of frames, an image based on an input image signal; a drive unit that applies a voltage based on the input image signal to pixels of the liquid crystal display unit; and a control unit that controls an amplitude of the voltage applied to the pixels. The drive unit applies, in one of the frames, a voltage of the same polarity to the pixels connected to one of the source signal lines. The control unit includes: a temperature-information acquiring unit that acquires temperature information of the drive unit; and a filter unit that acquires high-frequency and low-frequency components of the input image signal in a substantial extending direction of the source signal lines. The control unit controls the amplitude of the applied voltage using the temperature information and an output value of the high-frequency component.07-04-2013
20130169616DISPLAY DEVICE AND METHOD FOR DRIVING THE SAME - Discussed are a display device and a method for controlling the same, which are capable of achieving a reduction in power consumption, through selective application of a charge share mode or a pre-charge mode in accordance with the swing width of a data voltage. The disclosed method includes the steps of determining a positive or negative polarity of input image data on the basis of reference data and outputting a pre-charge enable signal when two successive image data have the same polarity; supplying a pre-charge voltage to a corresponding output channel in response to the pre-enable signal; and converting the image data into a data voltage, supplying the converted data voltage to a corresponding data line through the corresponding output channel.07-04-2013
20130169617CONTROL DEVICE AND CONTROL METHOD FOR DISPLAY PANEL - A charge-sharing control method for a display panel includes the following steps. Firstly, a first switch set is turned on, so that a first voltage driving unit provides a first positive driving voltage to a first data line and a second voltage driving unit provides a first negative driving voltage to a second data line. Then, a second switch set is turned on, so that a first charge storage unit has a positive common voltage and a second charge storage unit has a negative common voltage. Then, a third switch set is turned on, so that the first data line and the second data line are electrically connected with a ground voltage. After a polarity inversion, the second data line is charged according to a first comparison result and the first data line is discharged according to a second comparison result.07-04-2013
20130169619METHOD OF DRIVING DISPLAY PANEL AND DISPLAY APPARATUS FOR PERFORMING THE SAME - A display panel apparatus includes a display panel and a timing controller, and a data driver. The display panel includes a first subpixel and a second subpixel. The timing controller is configured to receive a first subpixel data for the first subpixel and a second subpixel data for the second subpixel. When the second subpixel is determined to be defective, the timing controller generates a compensated grayscale of the second subpixel data. The data driver is configured to apply a precharge voltage to the second subpixel and a charging voltage to second subpixel through a data line, wherein the precharge voltage is based on a grayscale of the first subpixel data and the charging voltage is based on the compensated grayscale of the second subpixel data.07-04-2013
20080225035Liquid Crystal Display and Pulse Adjustment Circuit Thereof - A liquid crystal display comprises a power supply, a pulse adjustment circuit, and a gate driver. The pulse adjustment circuit is connected between the power supply and the gate driver. The power supply provides power signals. The pulse adjustment circuit adjusts the plurality of pulses of the power signals or selects the appropriate voltage levels for the power signals to have cutting angles or enlarged amplitudes, whereby the influence of the feedthrough voltage on the thin film transistors of the driving circuit would be reduced so that the display quality of the liquid crystal display is improved.09-18-2008
20080225034Image sticking erasing circuit and method for using the same - The image sticking erasing circuit includes a detection circuit and a switching circuit connected to the detection circuit. The detection circuit is for use in detecting a first voltage signal, which closely follows the variation of the voltage source, and a reference voltage, which loosely follows the variation of the voltage source. When the detection circuit determines that the first voltage signal is lower than a first threshold value, the switching circuit switches the gate of a driving transistor to a second voltage signal, which loosely follows the voltage source. When the detection circuit determines that the reference voltage signal is lower than a second threshold value, the switching circuit switches the gate of a driving transistor to a low voltage state.09-18-2008
20130176295REFLECTIVE DISPLAY DEVICE - A reflective display device includes a pixel array including a plurality of pixels; a data driver connected to each of the plurality of pixels and configured to transmit a target voltage to each of the plurality of pixels; and a scan driver connected to each of the plurality of pixels and configured to transmit a switching signal for determining whether the data driver transmits the target voltage to some of the plurality of pixels, wherein each of the plurality of pixels is configured to receive the target voltage for single data information, receive the target voltage in a first time period when the target voltage transmitted to each of the plurality of pixels is between a first voltage level and a second voltage level, and receive the target voltage in a second time period when the target voltage is between the second voltage level and a third voltage level.07-11-2013
20090085905GAMMA-VOLTAGE GENERATION DEVICE AND LIQUID CRYSTAL DISPLAY DEVICE - The present invention relates to a Gamma-voltage generation device and a Liquid Crystal Display (LCD) device, wherein the Gamma-voltage generation device comprises: a voltage series generation unit for generating a plurality of groups of voltage series; and a multi-path selection unit for selecting one voltage value from each group of voltage series, respectively, according to a voltage selection signal and outputting the same to generate a needed Gamma-voltage series. The LCD device comprises a display panel, a row driver and a column driver, a timing controller, an image analyzing and processing unit, and a Gamma-voltage series generation device. The present invention achieves dynamic Gamma-voltage generation by choosing among a plurality of groups of voltages to output the needed Gamma-voltage series. Further, the plurality of groups of Gamma-voltage series could be obtained with resistor networks and such devices in the existing art as DAC and the like are unnecessary, thereby the response rate is improved and the cost is reduced.04-02-2009
20120249515DISPLAY PANEL, DISPLAY DEVICE, AND ELECTRONIC INSTRUMENT - A display panel includes, for each pixel, a self light emitting device and a pixel circuit driving the self light emitting device. The pixel circuit has a retention capacitor, a first transistor writing a voltage corresponding to a video signal in the retention capacitor, and a second transistor driving the self light emitting device based on the voltage of the retention capacitor, and the display panel has a light exit face discharging a light emitted from the self light emitting device to outside and also has a light blocking layer blocking an external light introduced from the light exit face to the first transistor.10-04-2012
20130169618LIQUID CRYSTAL DISPLAY DEVICE - A liquid crystal display device includes: a liquid crystal display unit that includes pixels and displays an image based on an input image signal input for each of frames; a drive unit that applies a voltage based on the input image signal to the pixels of the liquid crystal display unit while inverting a polarity of the voltage for each of the frames; a signal discrimination unit that discriminates whether the input image signal is an interlaced signal; and a signal generation unit that generates a phase inversion enabling signal for inverting a phase of the polarity of the voltage applied to the pixels, in a case where the signal discrimination unit discriminates that the input image signal is the interlaced signal. The drive unit inverts the phase of the polarity of the voltage applied to the pixels when the signal generation unit generates the phase inversion enabling signal.07-04-2013
20130093747LCD PANEL - The present invention discloses an LCD panel. The LCD panel comprises data lines, scan lines, and pixel units. Two arbitrarily adjacent data lines are respectively coupled to two data driver terminals outputting driving signals with opposite polarities. Three adjacent data lines intersect five adjacent scan lines to define eight pixel units of 4 rows*2 columns. In the pixel units in the (2n+1)04-18-2013
20130093749FLAT PANEL DISPLAY AND DRIVING CIRCUIT THEREOF - The present invention relates to increasing the driving reliability of a flat panel display by including a protector in the power supply control unit that provides a driving voltage to the display panel. The protector prevents unexpected sequence mode transition of the memory by preventing transmission of an abnormal voltage caused by applied stress while providing a supplied voltage to the memory during normal driving.04-18-2013
20130093748ORGANIC LIGHT EMITTING DIODE DISPLAY DEVICE - An organic light emitting diode display device that implements a high quality screen having uniform brightness by supplying uniform driving voltages to pixels irrespective of an external change is provided. The organic light emitting diode display device includes: an organic light emitting diode (OLED) panel comprising a plurality of pixels formed at crossings of a plurality of gate lines and a plurality of data lines of the panel; a timing controller configured to generate a plurality of control signals for driving the OLED panel; a data driver for driving the plurality of data lines; a gate driver for driving the plurality of gate lines; and a power supply unit configured to receive an input voltage and generate a stable driving voltage for driving each unit pixel of the liquid crystal panel without being affected by an instantaneous voltage rising and falling phenomenon of the input voltage.04-18-2013
20130093746PWM Voltage Regulator Circuit, Regulating Method using the same, and liquid Crystal Display Device - The invention discloses a PWM voltage regulator circuit, a regulating method using the same, and a liquid crystal display comprising the same. The PWM voltage regulator circuit comprises a PWM voltage regulating module, a feedback module connected with the PWM voltage regulating module, and a control module connected with the feedback module. The control module comprises a programmable image processing chip; and the programmable image processing chip comprises at least one memory bank (bank) and an access circuit. A feedback comparing reference voltage data of the PWM voltage regulating module is stored in a memory bank (bank), and the memory bank (bank) is connected with the feedback module by the access circuit. The invention can quickly regulate a PWM chip output voltage, increase IC generality, and reduce the product cost.04-18-2013
20130093745DISPLAY PANELS AND DISPLAY UNITS THEREOF - A display unit is provided. The display unit includes a multiplexer circuit, a latch circuit, and a liquid crystal capacitor. The multiplexer circuit receives a plurality of voltages. The plurality of voltages at least comprises a first voltage and a second voltage. The latch circuit receives a driving signal and a first data signal. When the driving signal is at an asserted state, the latch circuit controls the multiplexer circuit according to the first data signal to select the first voltage or the second voltage to serve as a display voltage. The liquid crystal capacitor receives the display voltage. The liquid crystal capacitor has a plurality of liquid crystal molecules, and an optical state of the plurality of liquid crystal molecules is determined according to the display voltage.04-18-2013
20130100109METHOD AND DEVICE FOR REDUCING EFFECT OF POLARITY INVERSION IN DRIVING DISPLAY - This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for reducing artifacts in an image generated by a display device. In one aspect, data is written to a display and a position of display elements is maintained based on the application of a hold voltage pattern. The hold voltage pattern includes alternating polarities along one dimension in a pattern, and alternating polarities along a second dimension in a pattern. The polarities of the first and second patterns may be switched in a manner that maintains a substantially constant magnitude voltage across each display element.04-25-2013
20130100111DISPLAY PANEL DRIVE TECHNIQUE FOR REDUCING POWER CONSUMPTION - A method of operating a display apparatus in which one source output of a source driver is connected with first to N-th data lines through first to N-th time division switches, the method includes precharging the first to N-th data lines by outputting a predetermined precharge voltage from the source output with the first to N-th time division switches turned on, and driving a specific pixel connected with one of the first to N-th data lines, by feeding a first drive voltage to the one of the first to N-th data lines from the one source output with associated one of the first to N-th time division switches turned on. The associated one of the first to N-th time division switches is kept turned on during a period between a first timing when the precharging is started and a second timing when the driving the specific pixel is completed.04-25-2013
20130100108LIQUID CRYSTAL DISPLAY AND DISPLAY DRIVING METHOD THEREOF - A liquid crystal display includes a date line for transmitting a data signal, a first gate line for transmitting a first gate signal, a second gate line for transmitting a second gate signal, a first sub-pixel unit for being written to by a first sub-pixel voltage according to the data signal and the first gate signal, a second sub-pixel unit for being written to by a second sub-pixel voltage according to the data signal and the first gate signal, a third sub-pixel unit for being written to by a third sub-pixel voltage according to the data signal and the first gate signal, and a charge sharing control unit. The charge sharing control unit is utilized for controlling a charge sharing operation over the first and third sub-pixel units according to the second gate signal, thereby adjusting the first and third sub-pixel voltages.04-25-2013
20130100106LIQUID CRYSTAL DISPLAY WITH COLOR WASHOUT IMPROVEMENT AND METHOD OF DRIVING SAME - An LCD panel with color washout improvement. In one embodiment, the LCD panel includes a plurality of pixels spatially arranged in a matrix form, each pixel defined between a respective pair of scanning lines (G04-25-2013
20130113781DISPLAY APPARATUS AND DRIVING METHOD THEREOF - A display apparatus is disclosed. The display apparatus includes a display panel having a scan electrode, a sustain electrode, and an address electrode, a driving unit which supplies a driving voltage to the scan electrode, the sustain electrode, and the address electrode so that each of a plurality of sub fields which form one frame include an address section and sustain section, and a control unit which controls the driving unit so that a width of the sustain pulse increases during the sustain section.05-09-2013
20130113779ORGANIC LIGHT EMITTING DIODE DISPLAY DEVICE - This embodiments herein relate to an organic light emitting diode display device comprising: a display panel configured to include a plurality of pixels disposed in a matrix form, wherein each of the pixels including: a driving TFT, an organic light emitting diode, a control circuit including first to fourth TFTs, capacitors. The embodiments described herein may improve accuracy of sensing a threshold voltage of the driving TFT even though the organic light emitting diode display device drives high frequency such as 240 Hz because sensing periods are long enough to sense the threshold voltage of the driving TFT. Also, the embodiments described herein may compensate a drop of a high potential voltage due to compensating the current between a drain electrode and a source electrode of the driving TFT by using the high potential voltage dropped.05-09-2013
20130113778ELECTRO-OPTICAL DEVICE AND ELECTRONIC APPARATUS - Provided is an electro-optical device including a first pixel group in which is written into each pixel electrode of the first pixel group via a first wiring in a first path, a second pixel group in which is written into each pixel electrode of the second pixel group via a second wiring in a second path, an common electrode that is common to the first pixel group and the second pixel group, and a compensation unit performing compensation on at least one of a voltage supplied to the first pixel group via the first wiring and a voltage supplied to the second pixel group via the second wiring, in such a manner as to reduce a difference between an optimal voltage of the common electrode with respect to the first pixel group and an optimal voltage of the common electrode with respect to the second pixel group.05-09-2013
20130113777METHOD OF TRANSFERRING DATA IN A DISPLAY DEVICE - A method of transferring data between a timing controller and a plurality of source drivers in a display device is disclosed. The method includes: (a) setting a first source driver of the plurality of source drivers to convert first signals having first voltage levels to second signals having second voltage levels; (b) receiving, by the first source driver, a first test pattern from the timing controller; (c) performing a test by the first source driver, based on the first test pattern, to determine whether an error has occurred in the first test pattern; and (d) when an error has occurred in the first test pattern, adjusting, by the first source driver, an output level of a receiver of the first source driver, so that the first source driver converts the first signals to third signals having third voltage levels different from the second voltage levels.05-09-2013
20130113776Power Management Circuit and Gate Pulse Modulation Circuit Thereof - A power management circuit for a liquid crystal display device is disclosed. The power management circuit includes one or more power generating circuits, for receiving one or more input voltages and generating one or more output voltages, respectively; a gate pulse modulation circuit, coupled between a gate high-level voltage source and a discharging control terminal, for generating a gate control signal; and a discharging controller, coupled to the discharging control terminal, for providing a discharging path for the gate pulse modulation circuit, wherein one of the gate pulse modulation circuit and the discharging controller is further coupled to a power supply such that the gate pulse modulation circuit discharges to the power supply during a gate discharging period, and the power supply is one of the one or more input voltages and the one or more output voltages.05-09-2013
20130120344OUTPUT COMPENSATION CIRCUIT AND OUTPUT COMPENSATION METHOD FOR LCD DATA DRIVE IC, AND LCD - An output compensation circuit and an output compensation method for an LCD data drive IC as well as an LCD comprising the same are disclosed. The output compensation circuit comprises a data drive IC, a plurality of first switch units and a plurality of delay control units. A plurality of output channels of the data drive IC each are connected with a corresponding row of pixel electrodes on a glass substrate via a data line respectively to output a charging signal. Each of the first switch units control the corresponding output channel according to a delay control signal generated by the corresponding delay control unit. Each of the delay control units is configured to generate the delay control signal-used to control the first switch unit to be turned on after a predetermined delay so that the charging time is the same for all the pixel electrodes.05-16-2013
20130127818PIXEL CIRCUIT AND DRIVING METHOD THEREOF - A driving method of a pixel circuit, implemented with five transistors and two capacitors, includes steps of: supplying three control signals and a gate signal to the pixel circuit; modulating an operation state of each control signal and keeping the gate signal being disable so as to reset data of the pixel circuit and have an voltage compensation effect on the pixel circuit; and enabling the gate signal so as to operate the pixel circuit in a data writing period, and supplying, in the data writing period, a data voltage to the pixel circuit so as to change a terminal voltage of a driving transistor, which is used to drive the light-emitting device. A pixel circuit is also provided.05-23-2013
20130127817METHOD FOR DRIVING AN ELECTRO-WETTING DISPLAY PANEL AND ELECTRO-WETTING DISPLAY APPARATUS FOR PERFORMING THE SAME - A method of driving an electro-wetting display panel including a pixel part is provided. In the method, data voltages are applied to the electro-wetting display panel during a first time of a frame. The frame has the first time and a second time. The first time has a plurality of horizontal periods. The data voltages are generated based on reference gamma voltages. At least one of reference gamma voltages of one of the horizontal periods is different from another of the reference gamma voltages of another of the horizontal periods. A reset voltage is applied to the electro-wetting display panel during the second time of the frame.05-23-2013
20130127814Controlling the Stabilization Period of an Electrophoresis Display Device - An electrophoresis display device that reduces power consumption of the device. The electrophoresis display device reduces power consumption by stopping the output of driving circuits that drive a display panel during a stabilization period following an image update period of the device.05-23-2013
20130127816DISPLAY APPARATUS AND DRIVING METHOD THEREOF - A display apparatus is provided. The display apparatus includes an image input unit which receives a 3D image, an image processing unit which divides the 3D image into a left-eye image and a right-eye image, an image output unit which includes a polarization panel that is switchable between polarization directions, and which provides a different polarization direction to the left-eye image and the right-eye image displayed alternately by switching a polarization direction of the polarization panel, a voltage driving unit which applies a driving voltage to the polarization panel, and a controller which divides the polarization panel in time or in space and drives the polarization panel with a voltage corresponding to each of Red, Green, and Blue (RGB) pixels, respectively, which form at least one of the left-eye image and the right-eye image.05-23-2013
20130127815DISPLAY DEVICE AND DRIVING METHOD THEREOF - A display device includes a display unit having a plurality of pixel, a scan driver that sequentially applies scan signals at a first voltage level to the plurality of pixels, a data driver that writes data by applying data signals to the plurality of pixels to correspond to the scan signals at the first voltage level, and a power source controller that supplies a first power source voltage and a second power source voltage to the plurality of pixels. The power source controller maintains the first power source voltage and the second power source voltage at the second voltage level while the data are written, and allows the plurality of pixels to which data are written to emit light by changing the first power source voltage into a third voltage level and the second power source voltage into the first voltage level after writing is complete.05-23-2013
20130135283DISPLAY DEVICE AND DRIVING METHOD THEREOF - A display device includes a display panel including a plurality of pixels, a data driver which transmits data voltages to the plurality of pixels, and a signal controller which receives an input image signal and an input control signal to control the data driver, where the signal controller calculates a ratio of a first type of pattern in a image based on the input image signal, generates a polarity signal based on the ratio of the first type of pattern, and transmits the polarity signal to the data driver.05-30-2013
20130141412Pixel Circuit, Organic Light Emitting Display Device, and Method of Driving the Pixel Circuit - A pixel circuit includes an OLED having a cathode coupled to a power source voltage, a first transistor having a second electrode coupled to an anode of the OLED, and a gate electrode coupled to a gate control-line, a second transistor having a second electrode coupled to a first electrode of the first transistor, a third transistor having a first electrode coupled to another power source voltage, a second electrode coupled to a first electrode of the second transistor, and a gate electrode coupled to a gate control-line, a fourth transistor having a first electrode coupled to a gate electrode of the second transistor, a second electrode coupled to the anode of the OLED, and a gate electrode coupled to a scan-line, and a capacitor coupled between the gate electrode of the second transistor and the second electrode of the third transistor.06-06-2013
20130141413DISPLAY DEVICE, METHOD FOR DRIVING THE SAME, AND ELECTRONIC DEVICE - A display device, a method for driving the same, and an electronic device capable of making μ correction function reliably even in the case where light emission luminance is low. A potential difference between the gate and the source of a transistor is corrected to a threshold voltage of the transistor. After that, while a horizontal drive circuit outputs a third voltage Vofs06-06-2013
20130141415Apparatus and method for adjusting a battery voltage level output in a portable terminal - A method and apparatus for performing compensation to adjust a battery voltage level output in a portable terminal without incorporating a dedicated battery gauge integrated circuit may include: calculating a color rate of an image when the image is output on an active matrix organic light-emitting diode (AMOLED), determining a current battery voltage value, performing compensation to adjust a battery voltage value based on the color rate of the image and the current battery voltage value, and displaying a battery residual quantity icon indicating a residual quantity of a battery based on the adjusted battery voltage value.06-06-2013
20130141416DIGITAL DRIVING CIRCUITS, METHODS AND SYSTEMS FOR LIQUID CRYSTAL DISPLAY DEVICES - A method may include generating display driver signals that vary between only two levels and applying the display driver signals to opposing electrodes of a display segment within a display device. The method varies a correlation between the display driver signals to select or de-select the display segment based on an average voltage magnitude across the display segment over a time period. The display segment is activated when the average voltage magnitude exceeds a threshold value.06-06-2013
20110273432Light Emitting Device, Driving Method for Same and Electronic Apparatus - It is a problem to provide a light-emitting device capable of obtaining a constant brightness without being affected by deterioration in an organic light-emitting layer or temperature change, and of making desired color display. The lowering in OLED brightness due to deterioration is reduced by causing the OLED to emit light while keeping constant the current flowing through the OLED instead of causing the OLED to emit light while keeping constant the OLED drive voltage. Namely, OLED brightness is controlled not by voltage but by current thereby preventing against the change in OLED brightness due to deterioration of OLED. Specifically, the drain current Id of a transistor for supplying a current to the OLED is controlled in a signal line drive circuit thereby keeping constant the drain current Id without relying upon the value of a load resistance.11-10-2011
20110273431MULTIPLEXER FOR DIFFERENTIAL SIGNAL - A multiplexer receives multiple differential signals, selects one differential signal, and outputs, via an output port, the differential signal thus selected. The multiple differential signals are respectively input to multiple differential input ports. Multiple buffers are respectively provided to the multiple differential input ports. Each buffer includes a differential input terminal connected to a corresponding differential input port, and a differential output terminal connected to an output port. Each buffer is configured to be capable of switching states, according to the control signal, between an enable state in which a differential signal that corresponds to a differential signal input to the differential input terminal is output, and a disable state in which current consumed by the buffer becomes substantially zero, and the differential output terminal thereof is set to a high-impedance state.11-10-2011
20110273430VOLTAGE LEVEL SHIFTING WITH REDUCED POWER CONSUMPTION - In an embodiment, a voltage level shifter circuit includes a first terminal configured to be connected to a high voltage supply rail (Vs+), a second terminal configured to be connected to a low voltage supply rail (Vs−), and an output voltage (V11-10-2011
20110273429ORGANIC LIGHT EMITTING DISPLAY DEVICE - An organic light emitting display device includes: a scan driver; a data driver; a display unit including pixels located at crossing regions of scan lines and data lines; first power lines coupled between a first power supply and the pixels; at least one second power line located outside the display unit and coupled to a second power supply having a voltage different from a voltage of the first power supply; at least one third power line coupled to a third power supply having a voltage different from the voltage of the first power supply; and fourth power lines coupled to the pixels, wherein the pixels are charged with voltages corresponding to the data signals and the third power supply and are configured to control the amount of current flowing from the first power supply in response to the voltages charges in the pixels.11-10-2011
20110273428ORGANIC LIGHT EMITTING DISPLAY DEVICE AND DRIVING METHOD THEREOF - An organic light emitting display device includes: a display unit including pixels coupled to scan lines and data lines; one or more control lines coupled to the pixels; a control line driver for supplying control signals to the pixels through the control lines; a first power driver for applying a first power having a low voltage level or a high voltage level to the pixels; and a second power driver for applying a second power having a low voltage level or a high voltage level to the pixels, in which each of the pixels includes: an organic light emitting diode (OLED); a driving transistor for controlling an amount of current supplied to the OLED; and an initializing transistor coupled to a gate electrode of the driving transistor and for supplying a reset voltage to the gate electrode of the driving transistor.11-10-2011
20110273427Organic light emitting display and method of driving the same - An organic light emitting display, and a method of driving the same, controls the voltage of a second power source in accordance with an ambient temperature. The organic light emitting display includes a driver IC configured to drive a pixel unit and to generate a control signal in accordance with an ambient temperature, and a DC-DC converter configured to generate a first power source and a second power source from an input voltage, to change a voltage of the second power source in accordance with the control signal from the driver IC, and to output the changed voltage of the second power source and the first power source.11-10-2011
20110273426Apparatus and method for driving e-paper panel - Disclosed herein are an apparatus and a method for driving an e-paper panel. The e-paper panel driving apparatus includes a power supply module that supplies a DC power, a DC/DC converter that converts voltage of the DC power supply supplied from the power supply module into a preset voltage, a sensing module that senses an output voltage from the DC/DC converter, and a control module that supplies or blocks the output voltage from the DC/DC converter to an e-paper panel according to the output voltage sensed by the sensing module.11-10-2011
20110096061DRIVING METHOD AND PIXEL DRIVING CIRCUIT FOR LED DISPLAY PANEL - A driving method for a LED display panel time-anneals threshold voltage shifting of a driving transistor. The driving transistor has a gate terminal coupled to a data input terminal, a source terminal coupled to a cathode via a LED, and a drain terminal coupled to a system voltage. The method includes inserting a black image after an image frame is displayed. During the time period of inserting the black image, a positive voltage is applied to the cathode to turn off the LED. A negative bias from the gate terminal to the drain terminal is produced to cause voltage level of the gate terminal to be less than the source terminal.04-28-2011
20110227906DISPLAY DRIVE APPARATUS AND DISPLAY APPARATUS - A display pixel including a light-emitting element and a drive element for supplying current flowing in a current path to the light-emitting element is applied with a detection voltage based on a predetermined unit voltage. Based on a value of current flowing in the current path of the drive element, a specific value corresponding to an element characteristic of the drive element is detected. A gradation voltage corresponding to a luminance gradation of display data is generated. Based on the specific value and the unit voltage, a compensated voltagea is generated. By compensating the gradation voltage based on the compensated voltage, a compensated gradation voltage is generated. And the compensated gradation voltage is supplied to the display pixel.09-22-2011
20110254827DISPLAY DEVICE - Provided are a display device and a method of driving the same, improving display quality by suppressing abnormal changes resulting from parasitic capacitance. The display device includes first and second pixel circuits having first and second switching elements and first and second display electrodes; and a display control voltage supply unit supplying a display control voltage to the first and second display electrodes. In a first write period, the display control voltage supply unit turns ON the first and second switching elements and supplies a display control voltage corresponding to display data of the first pixel circuit to the first and second display electrodes. In a second write period, the display control voltage supply unit maintains the switch of the second switching element to be in the ON state and supplies a display control voltage corresponding to display data of the second pixel circuit to the second display electrode.10-20-2011
20130147782DATA DRIVING APPARATUS AND OPERATION METHOD THEREOF AND DISPLAY USING THE SAME - A data driving apparatus includes two data driving circuits, each including a timing controller with a clock generator and configured to receive a specific portion of data corresponding to a row of pixel in an image frame, and, after receiving the specific portion of the data, process the portion of the data; wherein the two timing controllers have different data operation times. One timing controller outputs an enable command to another one once the processing of the respective portion of the data is complete. Then, another timing controller starts to process the respective portion of the data and output an output command to the first data driving circuit in response to a finish of the processing of the second portion of the data and thereby controlling the two data driving circuits to output the processed data. An operation method thereof and a display using the same are also provided.06-13-2013
20130147783PIXEL CIRCUIT AND DISPLAY DEVICE - A pixel circuit includes a display element unit including a unit liquid crystal display element having a liquid crystal layer between a pixel electrode and a counter electrode, a capacitor element having a tunnel insulating film between first and second electrodes wherein a tunnel current flows between the electrodes when a predetermined high voltage is applied between the electrodes, and a switch circuit having a first terminal connected to the second electrode of the capacitor element, a second terminal connected to a data signal line, and a control terminal connected to a scanning signal line, the control terminal controlling electrical connection between the first and second terminals. A voltage corresponding to pixel data with a voltage of the counter electrode being a reference is held in an internal node connecting the pixel electrode and the first electrode of the capacitor element.06-13-2013
20130093744METHODS AND SYSTEMS FOR ENERGY RECOVERY IN A DISPLAY - Systems, methods and apparatus, including computer programs encoded on computer storage media, are used for driving a display. In one aspect, the method includes connecting a first segment line to a first voltage, connecting a second segment line to a second voltage, and connecting the least a first segment line to the second segment line through at least one inductor. The polarities of segment line voltages may therefore be switched by reusing energy in the system.04-18-2013
20130141414STEREOSCOPIC IMAGE DISPLAY - The liquid crystal display of the present invention lowers the power consumption and heat generation of the data driving circuit 06-06-2013
20100295839Image Display Device - Disclosed is an image display device that provides power consumption reduction control in an improved manner. The image display device includes an input that inputs a video signal, an output controller that reproduces the video signal entered into the input, a display that displays an image in accordance with the video signal reproduced by the output controller, an imager that picks up an image of a user of the image display device, an attentiveness decider that analyzes the image picked up by the imager and judges whether the user is watching a display screen of the display, and a controller that selects either a normal mode or a power saving mode as a processing mode for light intensity control of a light source of the display or for reproduction in the output controller in accordance with the result of decision made by the attentiveness decider.11-25-2010
20100309190VOLTAGE ADJUSTMENT CIRCUIT AND DISPLAY DEVICE DRIVING CIRCUIT - A voltage adjustment circuit for adjusting a voltage to be supplied to scanning lines of a display device includes a slope adjustment circuit configured to adjust a slope of a decrease in the voltage based on data that is externally input, and a clamp voltage adjustment circuit configured to adjust a voltage value at which the voltage is clamped based on the data.12-09-2010
20120274623DISPLAY APPARATUS AND METHOD OF DRIVING THE SAME - In a display apparatus having a plurality of pixel parts, each pixel part receives a data signal in response to a present gate signal and charges first and second pixel voltages having the same voltage level. A plurality of voltage controllers includes a level-down part to lower a voltage level of the second pixel voltage using a previous pixel voltage charged in a previous frame in response to a next gate signal and a level-up part to receive the lowered second pixel voltage in response to the next gate signal to boost up a voltage level of the first pixel voltage.11-01-2012
20120274622ORGANIC LIGHT EMITTING DIODE PIXEL CIRCUIT - An organic light emitting diode (OLED) pixel circuit includes a driving node, a pixel driving unit, an electroluminescent device, and a compensation unit. The pixel driving unit is coupled to a data line receiving a data voltage and provides a driving voltage to the driving node. The display electroluminescent device is coupled to the driving node for illuminating in response to the driving voltage, wherein the level of the driving voltage is related to an aging factor voltage, corresponding to a usage time of the display electroluminescent device. The compensation unit, including a compensation electroluminescent device, is couple to the driving node and drives the compensation electroluminescent device to illuminate in response to the driving voltage, so as to compensate the aging decay of the display electroluminescent device with the electroluminescent compensation unit.11-01-2012
20110242087DISPLAY DEVICE AND DRIVING METHOD THEREOF - A display device includes a plurality of luminescent pixels arranged in a display. A power supply is connected to the plurality of luminescent pixels and configured to apply a high potential and a low potential to the plurality of luminescent pixels. A voltage measurer is configured to measure, for at least one pixel from among the plurality of luminescent pixels arranged in the display, at least one potential of the high potential and the low potential applied to the at least one pixel. A voltage regulator is configured to regulate the power supply in accordance with the at least one potential measured by the voltage measurer by setting a potential difference between the high potential and the low potential applied to the at least one pixel to a predetermined potential difference.10-06-2011
20110242086DISPLAY APPARATUS - A display apparatus of the present invention includes display sections (10-06-2011
20110242085VOLTAGE LEVEL SELECTION CIRCUIT AND DISPLAY DRIVER - A decoder includes a first sub-decoder that receives a first level voltage set and outputs voltages selected according to lower L-bits of N-bit data, a second sub-decoder that receives a second level voltage set and outputs voltages selected according to the lower L-bits, a third sub-decoder that selects, according to higher M-bits, one voltage from the voltages selected by the first and second sub-decoders, a fourth sub-decoder that outputs voltages selected according to lower P-bits from among a third level voltage set, a fifth sub-decoder that selects one voltage selected according to higher Q-bits from the voltages output from the fourth sub-decoder, and a sixth sub-decoder that controls conduction and non-conduction based on K-bits, between one output among outputs of the first sub-decoder, and one output among outputs of the fourth sub-decoder; output of the third sub-decoder and output of the fifth sub-decoder are connected to an output terminal; the first, second, and third sub-decoders are configured from transistor switches of said first polarity, and the fourth, fifth, and sixth sub-decoders are configured from transistor switches of said second polarity.10-06-2011
20110242084Source driver for liquid crystal display panel - A source driver for a liquid crystal display (LCD) panel in which during a first predetermined period immediately after polarity of a voltage according to image data is inverted, each column terminal of the LCD panel is shorted to a common line through an output terminal and a second switch element, a first output amplifying portion is set to a high impedance state, and an output signal of a second output amplifying portion is fed back to a differential amplifying portion through a third switch element. During a period after the first predetermined period and before inversion of polarity of a voltage according to the image data, an output signal of the first output amplifying portion is supplied to the output terminal without passing though a switch element, and is fed back to the differential amplifying portion through a fourth switch element. The output signal of the second output amplifying portion is fed back to the differential amplifying portion through the first and fourth switch elements.10-06-2011
20110234577SHIFT REGISTER WITH LOW POWER CONSUMPTION - A shift register comprises a plurality of stages. In one embodiment, each stage includes a first output, a second output, a pull-up circuit electrically coupled between a node and the second output, a pull-up control circuit electrically coupled to the node, a pull-down control circuit electrically coupled between the node and the first output, and a control circuit electrically coupled to the node and the first output.09-29-2011
20100315406Image data transfer to cascade-connected display panel drivers - A display device is provided with a display panel; first to n-th cascade-connected drivers (n being an integer of two or more); a controller transmitting compressed image data to the first driver. The i-th driver of the first to n-th drivers includes a drive circuitry driving the display panel; a first bus adapted to data transfer to the (i+1)-th driver of the first to n-th drivers; a second bus adapted to data transfer to the driver circuitry; and a decompression section receiving the compressed image data from the (i−1)-th driver of the first to n-th drivers or the controller. The decompression section of the i-th driver transfers the received compressed image data to the (i+1)-th driver through the first bus thereof, when the received compressed image data are not associated with the i-th driver. When the received compressed image data are associated with the i-th driver, the decompression section of the i-th driver decompresses the received compressed image data to generate decompressed image data and feeds the decompressed image data to the drive circuitry through the second bus. The drive circuitry drives the display panel in response to the decompressed image data.12-16-2010
20100315405DRIVING CIRCUIT FOR LIQUID CRYSTAL DISPLAY DEVICE - A driving circuit for a liquid crystal display device of at least one embodiment of the present invention includes: a scanning signal line driving circuit turning on switching elements in each horizontal scanning period; a video signal line driving circuit outputting a video signal whose polarity is reversed in synchronization with the each horizontal scanning period, the polarity being reversed in a subsequent horizontal scanning period assigned to one row from the polarity in a preceding horizontal scanning period assigned to the one row, the subsequent horizontal scanning period and the preceding horizontal scanning period being two successive horizontal scanning periods; a reference voltage generating section connected to the video signal line driving circuit; and a storage capacitance electrode driving circuit outputting, to each of storage capacitance voltage supply lines, a voltage of the each storage capacitance voltage supply line, the voltage having a polarity reversed every frame, the reference voltage generating section being capable of supplying, as a reference supply voltage for each video signal line, any voltage in accordance with a polarity of each of pixel electrodes connected to each scanning signal line, the reference supply voltage being supplied to the video signal line driving circuit, for example, at a start of display.12-16-2010
20100315404METHOD FOR DRIVING PLASMA DISPLAY DEVICE - In the method for driving a plasma display device, the plasma display panel are applied with voltage through the following process. In the first address period where an address discharge is generated on the scan electrodes that belong to the first scan electrode group, the third switching element is turned OFF so as to give a different value of reference voltage between the first and the second scan electrode driving sections. In the second address period where an address discharge is generated on the scan electrodes that belong to the second scan electrode group, the third switching element is turned ON so as to give a same value of reference voltage between the first and the second scan electrode driving sections. In the sustain period where sustain pulses are applied to a plurality of scan electrodes to generate a sustain discharge in the discharge cells, the third switching element is turned ON.12-16-2010
20130155045METHOD AND APPARATUS FOR POWER MANAGEMENT OF A GRAPHICS PROCESSING CORE IN A VIRTUAL ENVIRONMENT - A method and apparatus controls power management of a graphics processing core when multiple virtual machines are allocated to the graphics processing core on a much finer-grain level than conventional systems. In one example, the method and apparatus processes a plurality of virtual machine power control setting requests to determine a power control request for a power management unit of a graphics processing core. The method and apparatus then controls power levels of the graphics processing core with the power management unit based on the determined power control request.06-20-2013
20130155046Level Shifter With Low Voltage Loss - A system and method are disclosed for level shifting a DDC bus with a low voltage loss. A pull up circuit includes an NMOS transistor, a PMOS transistor and resistor. An NMOS pull up gate is also included in line with the DDC bus. When powered, the level shifter adjusts the voltage of transmitted signals to match the voltage of a receiving device. The resulting adjusted is slightly lower due to a threshold voltage lost across one or more transistors. Additionally, when unpowered, the level shifter releases the signal transmission line. Unadjusted signals can then be transmitted without consumption of power by the level shifter.06-20-2013
20120280971CIRCUITS FOR CONTROLLING DISPLAY APPARATUS - The invention relates to methods and apparatus for forming images on a display utilizing a control matrix to control the movement of MEMs-based light modulators.11-08-2012
20120280970DISPLAY DEVICE AND METHOD FOR DRIVING DISPLAY DEVICE - A display device according to the present invention includes: a variable voltage source which supplies a supply voltage to an organic EL display unit; and a voltage regulating unit which regulates an external application voltage output by the variable voltage source, the organic EL display unit further includes an anode-side power source line network and a cathode-side power source line network connected to the pixels and the variable voltage source, the display device further includes a voltage measuring unit which measures a voltage for a monitor pixel, and the voltage regulating unit which calculates distributions of voltage drop amount generated in the anode-side power source line network and the cathode-side power source line network, calculates a voltage for the monitor pixel from the distributions of the voltage drop amount calculated, and regulates the supply voltage based on the calculation result and the voltage measured by the voltage measuring unit.11-08-2012
20120280969DISPLAY SYSTEMS - We describe circuits and methods for compensating for gate kickback in electro-optic displays, in particular electrophoretic displays. In embodiments the method comprises compensating gate kickback comprising a change in voltage between a pixel electrode and a common electrode of the display arising from capacitive coupling between a gate drive line and the pixel electrode by offsetting a value of a common voltage on the common electrode by an offset value dependent on a difference between a magnitude of said positive gate voltage and a magnitude of said negative gate voltage.11-08-2012
20120280968DISPLAY DEVICE - The display device includes a display panel including plural pixels, and a transparent conductive film, and a voltage where an AC component is superposed on a DC component is supplied to the transparent conductive film.11-08-2012
20120280967GATE SIGNAL LINE DRIVE CIRCUIT AND DISPLAY DEVICE - Provided is a gate signal line drive circuit including a shift register basic circuit for applying a high voltage for a signal high period and a low voltage for a signal low period to a gate signal line at the time of a screen display. The shift register basic circuit includes a gate line high voltage applying circuit applying a high voltage for the signal high period to the gate signal line, and a gate line low voltage applying circuit applying a low voltage to the gate signal line, wherein in the shift register basic circuit, the off-voltage is applied to the switch of the gate line low voltage applying circuit for a predetermined period at the time of a screen non-display.11-08-2012
20120280966DISPLAY DRIVER AND FLICKER SUPPRESSION DEVICE THEREOF - A flicker suppression device applied in a display driver for preventing the output image data of the display driver from being affected by an electrostatic discharge (ESD) event is provided. The flicker suppression device includes an ESD detector and an output stage controller. The ESD detector is coupled to a first power wire of the display driver for determining whether an ESD level shift event occurs to the first system reference voltage signal on the first power wire. If so, a control signal corresponding to the first level is provided. The output stage controller controls the output stage circuit of the display driver to be in a high impedance state in response to the control signal corresponding to the first level to avoid the output stage circuit outputting an output image data that has been affected by an ESD event.11-08-2012
20120280965SYSTEM AND METHOD FOR CONTROLLING THE SLEW RATE OF A SIGNAL - Techniques for controlling the slew rate of a signal independently of RC time constants are disclosed. In one embodiment, a gate driver circuit for an LCD panel may include a rail-to-rail operational amplifier having an output stage configured to produce a gate activation signal for switching pixels of the LCD panel. A slew rate control circuit may be provided for adjusting the slew rate of the gate activation signal by varying a bias current of the output stage relative to a compensation capacitance and a gain of the operational amplifier. For instance, the slew rate may be increased by increasing the bias current, and decreased by decreasing the bias current without the need to adjust RC variables.11-08-2012
20130181967Organic Light Emitting Display Device, System Including Organic Light Emitting Display Device and Method of Driving Organic Light Emitting Display Device - An organic light emitting display device includes a pixel unit, a scan driver, a data driver and a voltage generation unit. The pixel unit includes a plurality of pixels coupled to a plurality of scan lines and a plurality of data lines, where each of the pixels includes an organic light emitting diode. The voltage generation unit is coupled to the pixel unit through one power line which provides the common supply voltage to the pixels. Each of the plurality of pixels includes a voltage drop unit, each voltage drop unit generates a respective drive voltage by dropping a voltage of the common supply voltage, and turns on the organic light emitting diode to emit light with a luminance corresponding to a voltage of the drive voltage based on a logic level of the data signal. The organic light emitting display device increases an aperture ratio.07-18-2013
20130181968DRIVE CIRCUIT OF DISPLAY DEVICE, DISPLAY DEVICE, AND METHOD OF DRIVING DISPLAY DEVICE - Three-dimensional images are displayed effectively even if a position of a display device is changed between a vertical position and a horizontal position. A drive circuit 07-18-2013
20130181969DISPLAY DEVICE AND DRIVE METHOD THEREFOR - Provided is a display device that can sufficiently secure a period for threshold value detection with a simple configuration and that can inhibit occurrence of luminance non-uniformity. The display device includes a plurality of pixel circuits; a gate driver circuit connected to a plurality of scanning signal lines and a plurality of control lines; and a power control circuit connected to a plurality of power lines through a common power line. Each pixel circuit includes an organic EL element, a plurality of TFTs, and a capacitor. During each frame period, after initialization and threshold value detection are collectively performed on a plurality of rows, writing and light emission are performed sequentially on a row-by-row basis. Here, in a preceding frame (first frame) of two consecutive frame periods, writing is performed in order from the first row to the nth row (ascending order). In a subsequent frame (second frame) of the two frame periods, writing is performed in order from the nth row to the first row (descending order).07-18-2013
20110279439Display apparatus, method of driving a display, and electronic device - In a display apparatus including a switching transistor, a correction voltage for eliminating an effect of a variation in a characteristic of a driving transistor is stored in a storage capacitor. The switching transistor is disposed between one current terminal of the driving transistor and a light emitting element. The switching transistor turns off during the non-light emission period thereby to electrically disconnect the light emitting element from the one current terminal of the driving transistor thereby preventing a leakage current from flowing through the light emitting element during the period in which the correction unit operates, and thus preventing the correction voltage from having an error due to the leakage current.11-17-2011
20130120347LEVEL SHIFTER CIRCUIT, SCANNING CIRCUIT, DISPLAY DEVICE AND ELECTRONIC EQUIPMENT - A level shifter circuit, wherein a first and a second transistor circuit are connected serially, a third and a fourth transistor circuit are connected serially; a first input voltage is applied to the second transistor circuit and a second input voltage is applied to the fourth transistor circuit; an input terminal of the first transistor circuit is connected to an output terminal of the third and the fourth transistor circuits, and an input terminal of the third transistor circuit is connected to an output terminal of the first and the second transistor circuits; two transistor circuits of at least one side of two transistor circuits of a first fixed power source side and two transistor circuits of a second fixed power source side are configured of double gate transistors; and the level shifter circuit has a switch element for applying a voltage to a common connection node.05-16-2013
20130120352DATA DRIVER - A data driver includes two data processing circuits for respectively providing positive and negative pixel voltages according to first and second pixel data, and a multiplexer circuit including multiplexer units. Each multiplexer unit has first and second input terminals respectively receiving the positive and negative pixel voltages, and an output terminal coupled to a data line. A first switching device has first and second switches serially coupled between the first input and output terminals. A node between the first and second switches is selectively grounded via a third switch. A second switching device has fourth and fifth switches serially coupled between the second input and output terminals. A node between the fourth and fifth switches is selectively grounded via a sixth switch. When the first and second switches turn on, the sixth switch turns on. When the fourth and fifth switches turn on, the third switch turns on.05-16-2013
20110310083DISPLAY DEVICE AND METHOD FOR DRIVING THE SAME - A display device including self-luminous emitting elements configured to suppress a display unevenness due to a transistor variation and reduce a noise when transmitting a gradation data to a pixel circuit, wherein the pixel circuit includes a driving transistor and a first switch transistor electrically connecting a gate electrode of the driving transistor with a drain electrode thereof, in which the gate electrode of the first switch transistor can be electrically connected to a data line, and the gate electrode controls a time period for which the first switch transistor conducts according to the gradation data and writes the gradation data on the pixel circuit.12-22-2011
20110310082Electrophoretic Display Apparatus and Method of Data Transfer Thereof - The electrophoretic display apparatus includes a first electrode layer, a second electrode layer, an electrophoresis layer, and a driving module. The driving module has an adsorption mode and a display mode. When an adsorption mode is activated, a first voltage difference is formed between the first electrode layer and the second electrode layer, resulting in electrostatic adsorption to reduce or eliminate the air gap between the second electrode layer and electrophoresis layer. When a display mode is activated, a second voltage difference is formed between the first electrode layer and the second electrode layer. The electrophoresis layer can sense the variation of electric field between the two electrode layers and start the operation of data transmission and display.12-22-2011
20110310081MULTI-DISPLAY SYSTEM AND METHOD THEREOF - A display displays a plurality of sequential image; each sequential image of the plurality of sequential images has corresponding gratings. When the display displays the sequential image of the plurality of sequential images, the gratings are turned on. When the display displays another sequential image of the plurality of sequential images, the gratings are turned off.12-22-2011
20130187901CIRCUIT FOR OUTPUTTING OVERDRIVE VOLTAGES OF A LIQUID CRYSTAL PANEL AND METHOD THEREOF - A circuit for outputting overdrive voltages of a liquid crystal panel includes a memory unit and an overdrive unit. The overdrive unit includes a first lookup table, a second lookup table, and a selector. The memory unit stores a plurality of second pixel voltages corresponding to a second frame displayed by the liquid crystal panel and outputs a plurality of first pixel voltages corresponding to a first frame displayed by the liquid crystal panel stored in the memory unit. The overdrive unit looks up the first lookup table and the second lookup table to generate a first overdrive voltage and a second overdrive voltage according to each first pixel voltage and a corresponding second pixel voltage. The selector outputs the first overdrive voltage or the second overdrive voltage according to a polarity signal and a frame signal.07-25-2013
20110316843LIQUID CRYSTAL ELEMENT, LIQUID CRYSTAL DISPLAY DEVICE, AND METHOD FOR DISPLAYING WITH LIQUID CRYSTAL DISPLAY ELEMENT - A liquid crystal display element, a liquid crystal display device, and a method for displaying with a liquid crystal display element, wherein picture element electrodes (12-29-2011
20130113780LIQUID CRYSTAL DISPLAY DEVICE - According to one embodiment, a liquid crystal display device includes a first substrate, a second substrate, a liquid crystal layer, and a common electrode. A first driving circuit and a second driving circuit output a scanning signal to a scanning line and alternately output a first auxiliary capacitive voltage and a second auxiliary capacitive voltage to a auxiliary capacitive line. A first switching circuit is connected to the first driving circuit and alternately switches between a first state and a second state. A second switching circuit is connected to the second driving circuit and alternately switches between the first state and the second state.05-09-2013
20120019507IMAGE DISPLAY APPARATUS AND IMAGE CORRECTION METHOD - The present invention is aimed at appropriately suppressing display failure such as a tailing phenomenon and the like in a normally white type liquid crystal panel. A driver (01-26-2012
20120019506METHOD AND APPARATUS FOR POWER CONTROL OF AN ORGANIC LIGHT-EMITTING DIODE PANEL AND AN ORGANIC LIGHT-EMITTING DIODE DISPLAY USING THE SAME - A power control method, a power control apparatus, and an OLED display are provided. The method includes the steps of: estimating a voltage value according to image content of an image, the voltage value indicative of a minimal required voltage allowing the OLED panel to display the image; and controlling a voltage generator to adjust a booster voltage provided to the OLED panel according to the estimated voltage value.01-26-2012
20120019505PIXEL AND ORGANIC LIGHT EMITTING DISPLAY DEVICE USING THE SAME - A pixel includes: an organic light emitting diode; a first transistor having a second electrode coupled with the organic light emitting diode and a first electrode coupled with a data line; a second transistor coupled between a gate electrode and the second electrode of the first transistor and turned on when a first scan signal is supplied to a first scan line; a third transistor coupled between the first electrode of the first transistor and the data line and turned on when a second scan signal is supplied to the second scan line; a first capacitor coupled between the first electrode of the first transistor and a first power supply; and a second capacitor coupled between the gate electrode of the first transistor and the first power supply.01-26-2012
20120019504PIXEL AND ORGANIC LIGHT EMITTING DISPLAY DEVICE USING THE SAME - A pixel includes an OLED coupled to a second power supply, a first transistor coupled to a first power supply for controlling current through the OLED, a second transistor coupled between a data line and the first transistor, third transistors coupled between a gate electrode and a second electrode of the first transistor, the second and third transistors configured to be turned on when the scanning signal is supplied to the i-th scanning line, fourth transistors coupled between an initial power supply and the first transistor, and configured to be turned on when the scanning signal is supplied to an i−1-th scanning line, a first capacitor coupled between the first power supply and the first transistor, and a second capacitor with a first terminal coupled to nodes between two of the third transistors and two of the fourth transistors, and a second terminal coupled to the first power supply.01-26-2012
20130194248Pixel Circuit, Method of Driving the Same, and Organic Light Emitting Display Device Having the Same - A method of driving a pixel circuit includes initializing a driving transistor and a storage capacitor by simultaneously applying an initialization voltage and a first power voltage to a gate electrode of the driving transistor and the storage capacitor, respectively, diode-coupling the driving transistor, applying a data voltage to the storage capacitor, applying the data voltage to the gate electrode of the driving transistor by a coupling of a compensation capacitor coupled between the gate electrode of the driving transistor and the storage capacitor, and applying a current corresponding to the first power voltage and the data voltage to an organic light emitting diode that is coupled to the driving transistor.08-01-2013
20130194249VIDEO PROCESSING CIRCUIT, VIDEO PROCESSING METHOD, LIQUID CRYSTAL DISPLAY DEVICE, AND ELECTRONIC APPARATUS - A video processing circuit includes a boundary detection unit which detects a boundary between a first pixel in which an application voltage which is designated by a video signal Vid-in is lower than a first voltage and a second pixel which exceeds a second voltage in which the application voltage is higher than the first voltage in a normally black mode; and a correction unit which corrects a video signal in which an application voltage to a liquid crystal element corresponding to the first pixel which comes into contact with a boundary detected by the boundary detection unit is designated to be a video signal in which a correction voltage which is higher than the application voltage is designated in a part of period of one frame period, and a correction voltage which is lower than the application voltage is designated in other periods of the one frame period.08-01-2013
20130194250METHODS FOR DRIVING ELECTRO-OPTIC DISPLAYS - A variety of methods for driving electro-optic displays so as to reduce visible artifacts are described. Such methods include (a) applying a first drive scheme to a non-zero minor proportion of the pixels of the display and a second drive scheme to the remaining pixels, the pixels using the first drive scheme being changed at each transition; (b) using two different drive schemes on different groups of pixels so that pixels in differing groups undergoing the same transition will not experience the same waveform; (c) applying either a balanced pulse pair or a top-off pulse to a pixel undergoing a white-to-white transition and lying adjacent a pixel undergoing a visible transition; (d) driving extra pixels where the boundary between a driven and undriven area would otherwise fall along a straight line; and (e) driving a display with both DC balanced and DC imbalanced drive schemes, maintaining an impulse bank value for the DC imbalance and modifying transitions to reduce the impulse bank value.08-01-2013
20120026153Liquid Crystal Driving Circuit - A liquid-crystal-driving circuit includes: a plurality of resistors connected in series between a first and second potentials; one or more voltage follower circuits to impedance-convert one or more intermediate potentials between the first and second potentials, to be outputted, respectively, the intermediate potentials generated at one or more connection points between the resistors, respectively; a common-signal-output circuit to supply common signals to common electrodes of a liquid-crystal panel, respectively, the common signals each being at the first and second potentials, and the intermediate potentials; and a segment-signal-output circuit to supply segment signals to segment electrodes of the panel, respectively, the segment signals each being at the first and second potentials, and the intermediate potentials according to the common signals, the segment-signal output circuit to change the potentials of the segment signals in a ramp form, at least if the potentials of the segment signals are changed with a maximum-possible-potential difference.02-02-2012
20120056865LIGHT EMITTING DIODE DRIVING APPARATUS - A light emitting diode (LED) driving apparatus is provided, which includes a power conversion circuit for receiving and converting an input power so as to generate a DC voltage to simultaneously drive a plurality of LED strings arranged in parallel; and a plurality of current regulation chips each having a single regulation channel and respectively corresponding to the LED strings, wherein an i03-08-2012
20130201171DISPLAY DEVICE AND DRIVING METHOD THEREOF - A display device for preemptively preventing an error caused by a fault in the scan circuit is disclosed. In one aspect, it includes: a display including a plurality of pixels connected to a plurality of scan lines and a plurality of data lines, a scan driver for sequentially applying a plurality of scan signals to the scan lines, and a signal controller for controlling the scan driver. In addition, the signal controller receives a final scan signal that is output for the last time from among the scan signals from the scan driver, detects output timing of the final scan signal, and determines whether the scan driver is normally driven. Accordingly, a display error caused by a fault of the scan circuit can be preemptively prevented.08-08-2013
20130201172PIXEL AND ORGANIC LIGHT EMITTING DIODE DISPLAY USING THE SAME - A pixel and an organic light emitting diode (OLED) display using the pixel are disclosed. The pixel includes a driving transistor for transmitting a driving current, an organic light emitting diode (OLED) receiving a first portion of the driving current, and a bypass transistor receiving a second portion of the driving current.08-08-2013
20130201173SYSTEM AND METHODS FOR EXTRACTION OF THRESHOLD AND MOBILITY PARAMETERS IN AMOLED DISPLAYS - A system to improve the extraction of transistor and OLED parameters in an AMOLED display includes a pixel circuit having an organic light emitting device, a drive device to provide a programmable drive current to the light emitting device, a programming input to provide the programming signal, and a storage device to store the programming signal. A charge-pump amplifier has a current input and a voltage output. The charge-pump amplifier includes an operational amplifier in negative feedback configuration. The feedback is provided by a capacitor connected between the output and the inverting input of the operational amplifier. A common-mode voltage source drives the non-inverting input of the operational amplifier. An electronic switch is coupled across the capacitor to reset the capacitor. A switch module including the input is coupled to the output of the pixel circuit and an output is coupled to the input of the charge-pump amplifier.08-08-2013
20130100107METHOD AND APPARATUS FOR MODEL BASED ERROR DIFFUSION TO REDUCE IMAGE ARTIFACTS ON AN ELECTRIC DISPLAY - This disclosure provides methods and apparatus, including computer programs encoded on computer storage media, for reducing visual aberrations on an electronic display. One aspect is a method of writing an input image data value to a display element in a electronic display. The method includes receiving an input image data value, and quantizing the image data value based on a threshold. The threshold may be modulated based on a voltage drive signal provided to the display element in the electronic display. The method may also write the quantized image data value to the display element.04-25-2013
20120299902DISPLAY APPARATUS - A method of driving an electro-luminescent apparatus including a scanning line, a data line, a power supply line, a pixel electrode, an opposite electrode, a luminescent element interposed between the pixel electrode and the opposite electrode, a first transistor, and a second transistor. In this method, setting a first potential of the power supply line and a second potential of the opposite electrode such that the first potential is higher than the second potential, and setting a first gate voltage that is applied to the first gate electrode and that makes the power supply line be electrically connected to the pixel electrode through the first transistor such that the first gate voltage is equal to or higher than the second potential set by the setting of the first potential and the second potential.11-29-2012
20120086700Display Device And Method For Driving Same - There is provided a display device in which even if the amplitude of the voltage of a source wiring line is relatively small, the amplitudes of the voltages of subpixels can be increased and the voltage difference between the subpixels can be furthermore increased. In at least one example embodiment, voltages of equal magnitudes are provided to pixel electrodes in a first subpixel portion and a second subpixel portion from a source wiring line. Thereafter, by changing an applied voltage to an auxiliary capacitance wiring line, voltages of different magnitudes are provided to the pixel electrodes in the first subpixel portion and the second subpixel portion. By this, a voltage difference is generated between the pixel electrode in the first subpixel portion and the pixel electrode in the second subpixel portion.04-12-2012
20120086699DISPLAY PANEL DEVICE AND CONTROL METHOD THEREOF - A display panel includes a luminescence element and a capacitor. A driving transistor includes a gate that is connected to a first electrode of the capacitor. A first switch is connected to the first electrode of the capacitor for setting a reference voltage to the first electrode of the capacitor. A data line supplies a data voltage to a second electrode of the capacitor. A second switch is connected between the data line and the second electrode of the capacitor. A wiring is connected to a first electrode of the luminescence element and the second electrode of the capacitor for interconnecting a first power line and the first electrode of the luminescence element with the second electrode of the capacitor, the second switch, and the data line. A third switch is connected in series with the driver between the first electrode of the luminescence element and the first power line.04-12-2012
20120086698SWITCH APPARATUS - A switch apparatus includes multiple operation switches and a display controller. Each of the operation switches has a display unit constructed of electronic paper that can rewrite a display image in a condition of being supplied with electric power and retain a rewritten display image after electric power supply is terminated. The display controller performs a display image rewriting processing that permits electric power supply to a target display unit, instructs the target display unit to rewrite a display image, and terminates electric power supply to the target display unit after instructing the target display unit to rewrite the display image. The display controller performs the display image rewriting processing successively to any of the display units whose display image is to be rewritten.04-12-2012
20120086697DRIVING DEVICE OF DISPLAY DEVICE - There is provided a driving device of a display device, including: a first switching portion; a second switching portion; and a control section that, when the potential of a drive signal line is lower than a target potential, operates the first switching portion by using, as a first reference potential, a potential that is less than or equal to the target potential and that is closest to the target potential, among predetermined n types (n≧1) of potentials, and, when the potential of the drive signal line is higher than the target potential, operates the second switching portion by using, as a second reference potential, a potential that is greater than or equal to the target potential and that is closest to the target potential, among the n types of potentials.04-12-2012
20120086696Level converting circuit, display device, and electronic apparatus - A level converting circuit includes a level converting part and a bias part. The level converting part includes at least first to fourth n-type field effect transistors and first and second p-type field effect transistors. The bias part includes a fifth n-type field effect transistor, a voltage drop part including at least one resistive element, and a current source having a power-supply-side terminal connected to a voltage source of a voltage higher than a first voltage. The bias part generates a bias voltage higher than the first voltage by the threshold voltage of the first and second n-type field effect transistors or a bias voltage that is higher than the first voltage and lower than the threshold voltage at the side of one end of the resistive element, and supplies the bias voltage to the gates of the first and second n-type field effect transistors in the level converting part.04-12-2012
20120086695ENVIRONMENTAL PROTECTION ANNOUNCEMENT SYSTEM AND IMPLEMENTATION METHOD THEREOF - An environmental protection announcement system and an implementation method thereof are provided. The environmental protection announcement system includes an announcement device and an information carrier. The information carrier is capable of storing announcement information constructed by an information supply side, so as to enable a user to be in information connection with the announcement device through the information carrier and to drive the announcement device to change display content with a small current. In a normal state, the announcement device does not need an external power supply, thereby achieving the effect of energy saving.04-12-2012
20130207960Imaging Device with Zero Ohmic Drop in a Data Conductor - An imaging device comprising comprises a matrix of pixels, at least one data conductor connected to several pixels of the matrix, organized row-wise and successively transporting signals delivered by respectively the pixels of the row and an electronic current generator supplying several pixels, each of the pixels comprising: a transistor delivering at the node of the pixel, the signal delivered by the pixel considered and wherein can flow a bias current from the current generator, and a first electronic switch connecting the node of the pixel to the data conductor associated with this pixel as a function of a selection signal of the pixel. Each of the pixels comprises a second electronic switch, distinct from the first electronic switch, joined to the node of the pixel, the current arising from the generator to be made to flow in the transistor as a function of the selection signal for the pixel.08-15-2013