Class / Patent application number | Description | Number of patent applications / Date published |
315172000 | Periodic switch in one of the supply circuits | 25 |
20080238330 | LIGHT EMITTING ELEMENT DRIVING CIRCUIT - A light emitting element driving circuit, which can achieve accurate/high-speed operation even at low voltage supply voltage, comprises: driving current supply, connected to light emitting element in series between first and second power supplies, to supply driving current to the light emitting element according to the voltage of control terminal; current determiner to determine and output the current according to an output light amount of the light emitting element; current/voltage converter to convert the determined current into voltage and output it to the control terminal of the driving current supply if control signal is in a first state, and to electrically shield its output voltage terminal from the control terminal of the driving current supply if the control signal is in a second state; and resetter to connect the control terminal of the driving current supply to the second power supply if the control signal is in the second state. | 10-02-2008 |
20130154488 | Dimmable LED Driver with Multiple Power Sources - A dimmable LED driver with multiple power sources. | 06-20-2013 |
20130187554 | IMAGE DISPLAY DEVICE - An image display device includes: an organic EL element, a first electrostatic capacitor, a driving transistor having a gate connected to a first electrode of the first electrostatic capacitor and a source connected to an anode of the organic EL element, a second electrostatic capacitor having an electrode connected to a second electrode of the first electrostatic capacitor, a negative power source line which determines the potential of a cathode of the organic EL element, and a scanning line driving circuit which controls a first switching transistor, a second switching transistor, and a third switching transistor. In a non-light-emitting period, the scanning line driving circuit sets, during a period from a start of a reset period to an end of the non-light-emitting period, a fixed voltage corresponding to the potential of the negative power source line to the source electrode of the driving transistor. | 07-25-2013 |
20130249413 | LIGHT EMITTING ELEMENT PIXEL DRIVING CIRCUIT - A pixel circuit includes a control switch module, a capacitor, a driving switch, and a light emitting element. The control switch module is enabled and disabled according to a scan signal. A first end of the capacitor can be electrically connected to the control switch module, and a second end of the capacitor can be electrically connected to a voltage level. The capacitor receives and stores a predetermined driving voltage when the control switch module is enabled. Area of the capacitor occupies more than 20% area of the pixel circuit. The driving switch can be electrically connected to the capacitor and a voltage source for controlling a driving current flowing through the driving switch according to the predetermined driving voltage stored in the capacitor. The light emitting element emits light according to the driving current flowing through the driving switch. | 09-26-2013 |
20130264950 | PIXEL CIRCUIT AND DISPLAY DEVICE - A display device having at least a plurality of pixel circuits, connected to signal lines to which data signals in accordance with luminance information are supplied, arranged in a matrix, wherein pixel circuits of odd number columns and even number columns adjacent sandwiching an axis in a column direction parallel to an arrangement direction of the signal lines have a mirror type circuit arrangement symmetric about the axis of the column direction, and there are lines different from the signal lines between signal lines of adjacent pixel circuits. | 10-10-2013 |
20130307421 | PIXEL CIRCUIT, DISPLAY DEVICE, AND ELECTRONIC DEVICE - An object is to enable application of forward/reverse voltage to or forward/reverse current to a display element and to lower power consumption of a driver circuit for driving a pixel. A memory storing the potential of a source signal line input through a switch, a first transistor whose gate is supplied with one output of the memory, a second transistor whose gate is supplied with the other output of the memory, a display element electrically connected to one of a source a drain of a first transistor and one of a source and a drain of a second transistor, a power source line electrically connected to the other of the source and the drain of the first transistor and the other of the source and the drain of the second transistor, and a counter power source electrically connected to the display element are included. | 11-21-2013 |
20140117861 | DIFFERING BOOST VOLTAGES APPLIED TO TWO OR MORE ANODELESS ELECTRODES FOR PLASMA PROCESSING - This disclosure describes a non-dissipative snubber circuit configured to boost a voltage applied to a load after the load's impedance rises rapidly. The voltage boost can thereby cause more rapid current ramping after a decrease in power delivery to the load which results from the load impedance rise. In particular, the snubber can comprise a combination of a unidirectional switch, a voltage multiplier, and a current limiter. In some cases, these components can be a diode, voltage doubler, and an inductor, respectively. | 05-01-2014 |
20140117862 | DRIVING CIRCUIT AND METHOD FOR PIXEL UNIT, PIXEL UNIT AND DISPLAY APPARATUS - A driving circuit and method for a pixel unit, the pixel unit and a display apparatus. The driving circuit for the pixel unit includes a switching unit, a storage capacitor (Cst), a first transistor (T | 05-01-2014 |
20140139123 | LED Light-Adjustment Driver Module, Backlight Module and Liquid Crystal Display Device - The present invention provides an LED light-adjustment driver module, which includes a duty cycle detection unit, a current output unit, a comparator and a capacitor unit. The first input end of comparator is connected to capacitor unit, and the second input end of comparator inputs a default threshold voltage. The duty cycle detection unit is for receiving externally inputted PWM signal and detecting the duty cycle of the PWM signal; when the duty cycle detection unit detects the duty cycle is less than a default threshold, the current output unit increases the output current or the capacitor unit reduces the capacitance provided to reduce the time for the voltage of the capacitor unit to reach the threshold voltage. The present invention can increase the charging speed of the capacitor unit. | 05-22-2014 |
20140139124 | ORGANIC LIGHT EMITTING DISPLAY - There is provided an organic light emitting display capable of displaying an image with uniform brightness while securing a high aperture ratio. The organic light emitting display includes a plurality of first subpixels and a plurality of second subpixels alternately arranged in a single column line and a third subpixel arranged in another column line adjacent to the first subpixels and the second subpixels. First subpixels positioned in the single column line may be alternately electrically coupled to different data lines. | 05-22-2014 |
20140145624 | IGNITION SYSTEM - An ignition system includes an ignition plug, a discharge power supply for applying a high voltage to the gap of the ignition plug, a high-frequency power supply for supplying a high-frequency current to the gap, a matching unit provided between the ignition plug and the high-frequency power supply, and a mixer through which currents output from the two power supplies flow. An oscillation frequency fs (Hz) which maximizes the current flowing between the matching unit and the mixer when spark discharge is generated and an oscillation frequency fo (Hz) which maximizes the current flowing between the matching unit and the mixer when spark discharge is not generated satisfy a relation fs/fo≧0.85. Thus, a current whose oscillation frequency is equal to the oscillation frequency fs flows between the matching unit and the mixer when spark discharge is not generated. | 05-29-2014 |
20140145625 | Semiconductor Device, Display Device, and Electronic Device - To prevent an influence of normally-on characteristics of the transistor which a clock signal is input to a terminal of, a wiring to which a first low power supply potential is appled and a wiring to which a second low power supply potential lower than the first low power supply potential is applied are electrically connected to a gate electrode of the transistor. A semiconductor device including the transistor can operate stably. | 05-29-2014 |
20140175992 | PIXEL CIRCUIT, DRIVING METHOD THEREOF, AND DISPLAY DEVICE - Provided are a pixel circuit, a driving method thereof, and a display device, which relate to the field of the display technology and can effectively compensate variation in currents due to ununiformity and drift of threshold voltages of driving Thin Film Transistors as well as ununiformity of OLEDs. The pixel circuit comprises: a light-emitting element; a driving TFT; a first TFT having a drain connected to a gate of the driving TFT; a second TFT having a drain connected to a source of the driving TFT; a third TFT having a source connected to a drain of the driving TFT, and a drain connected to the light-emitting element; a fourth TFT having a source connected to the gate of the driving TFT, and a drain connected to the drain of the driving TFT; a fifth TFT having a drain connected to the source of the driving TFT; and a capacitor. | 06-26-2014 |
20140191669 | DRIVING CIRCUIT AND METHOD FOR PIXEL UNIT, PIXEL UNIT AND DISPLAY APPARATUS - The present invention provides a driving circuit and method for a pixel unit, a pixel unit and a display apparatus. The driving circuit for a pixel unit comprises: a driving thin-film transistor, a first switching element, a storage capacitor and a driving control unit; said driving control unit is used to control said storage capacitor to be charged/discharged so as to control said driving thin-film transistor to operate in a saturation region, so that the threshold voltage Vth of said driving thin-film transistor is compensated by utilizing the gate-source voltage of said driving thin-film transistor. The present invention can address the problems of ununiformity and attenuation of the brightness of OLED panel. | 07-10-2014 |
20140232276 | LIGHT-EMITTING PANEL, DISPLAY DEVICE AND ELECTRONIC EQUIPMENT - Disclosed herein is a light-emitting panel including: an organic electroluminescence element adapted to emit electroluminescence light toward a transparent substrate; a pixel circuit formed on the transparent substrate and adapted to drive the organic electroluminescence element; a color filter formed not only between the transparent substrate and organic electroluminescence element but also immediately on or above the pixel circuit; and a conductive layer formed between the pixel circuit and color filter, the conductive layer being more conductive than the color filter. | 08-21-2014 |
20140312784 | PIXEL CIRCUIT AND DRIVING METHOD THEREOF, ORGANIC LIGHT-EMITTING DISPLAY PANEL AND DISPLAY APPARATUS - The present disclosure relates to the field of organic light-emitting display, and provides a pixel circuit, a driving method thereof, an organic light-emitting display panel and a display apparatus, comprising a driving transistor, a first storage capacitor, a collecting unit, a writing unit and a light-emitting unit; wherein, the collecting unit is used. for collecting the threshold voltage of the driving transistor and storing the threshold voltage into the first storage capacitor, under the control of the first scan signal; the writing unit is used for storing the data voltage inputted from the input terminal for the data voltage under the control of the second scan signal; and the light-emitting unit is used for emitting lights, driven by the data voltage and a voltage inputted from the input terminal for the controllable low voltage, under the control of the light-emitting control signal. Thus an organic light-emitting device is not affected by the threshold voltage shift of the driving transistor, which may enhance the image uniformity of the organic light-emitting display panel effectively, slow down the decay speed of an organic light-emitting device and ensure the uniformity and a constancy of brightness of the organic light-emitting display panel. | 10-23-2014 |
20140333214 | PIXEL CIRCUIT AND DRIVING METHOD THEREOF - A pixel circuit including a light emitting element outputting a gray scale based on a current supplied thereto, a first transistor configured to control an amount of current supplied to the light emitting element based on a gray scale data voltage supplied to a gate electrode of the first transistor, a second transistor connected between the gate electrode of the first transistor and an initialization voltage, a third transistor connected between the gate electrode of the first transistor and a first terminal of the first transistor; a fourth transistor connected between the first terminal of the first transistor and the light emitting element, and a fifth transistor connected between a second terminal of the first transistor and a data line. The data line is selectively supplied with the gray scale data voltage and a power supply voltage for light emitting of the light emitting element to the fifth transistor. | 11-13-2014 |
20150332656 | DRIVING CIRCUIT FOR DISPLAY PANEL AND DRIVING METHOD THEREOF - A driving circuit of a display panel and driving method thereof are provided. The driving circuit of the display panel has a capacitor, a first, second, third, fourth, fifth, and sixth thin film transistor, a reset thin film transistor, and an output thin film transistor. A sixth and seventh drain electrode, and an eighth gate electrode are connected to a signal output line, a sixth source electrode is configured to receive a fourth power source signal, an eighth is configured to receive a fifth power source signal, and an eighth drain electrode is connected to a sixth gate electrode. | 11-19-2015 |
20150339976 | PIXEL DRIVING CIRCUIT FOR ORGANIC LIGHT EMITTING DIODE DISPLAY AND OPERATING METHOD THEREOF - A pixel driving circuit includes a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, an organic light emitting diode, and a capacitor. The second transistor is electrically connected between a first end and a gate end of the first transistor. The third transistor is electrically connected between the first end of the first transistor and a first supply voltage source. The fourth transistor is electrically connected between a second end of the first transistor and a data input end. The fifth transistor is electrically connected to the second end of the first transistor. The organic light emitting diode is electrically connected between the fifth transistor and a second supply voltage source. The capacitor is electrically connected to the gate end of the first transistor. | 11-26-2015 |
20150379956 | PIXEL CIRCUIT AND DRIVING METHOD THEREOF - To prevent image retention, the pixel circuit includes: a light emitting element; a driving transistor which supplies an electric current according to an applied voltage to the light emitting element; a capacitor part which holds the voltage containing a threshold voltage and a data voltage of the driving transistor; and a switch part which has the voltage containing the threshold voltage and the data voltage held to the capacitor part and applies the voltage to the driving transistor. Further, the switch part has a function which applies a constant voltage to the driving transistor before having the voltage containing the threshold voltage and the data voltage held to the capacitor part. | 12-31-2015 |
20160012780 | PIXEL AND ORGANIC LIGHT EMITTING DISPLAY DEVICE USING THE SAME | 01-14-2016 |
20160019837 | PREFABRICATED SUBSTRATE OF ARRAY SUBSTRATE, VAPOR DEPOSITION METHOD, ARRAY SUBSTRATE AND DISPLAY APPARATUS - The present invention provides a prefabricated substrate of array substrate, a vapor deposition method, an array substrate and a display apparatus, which can solve a problem that there is a waste of material in a vapor deposition process of the prior art. The prefabricated substrate comprises a plurality of sub-pixel units, each sub-pixel unit comprising a drive unit and a sub-pixel electrode connected with the drive unit, wherein, the drive unit is also connected with a data line and a gate line, and is used for transferring a data voltage signal outputted from the data line to the sub-pixel electrode when the gate line is strobed. The sub-pixel unit further comprises a switch unit connected with the data line and the sub-pixel electrode The switch unit is used for adjusting voltage of the sub-pixel electrode under control of a switch signal outputted from a switch signal line. | 01-21-2016 |
20160027377 | ORGANIC LIGHT EMITTING DIODE DISPLAY DEVICE - An organic light emitting diode display device includes a display panel and a power supply. The power supply applies a first power supply voltage and a second power supply voltage to a first power supply voltage line. The first power supply voltage line includes a first extension, a second extension, and third extension. The first extension is disposed along a first direction from the first side portion to the second side portion. The first extension has a width that gradually decreases along the first direction. The second extension is disposed along a second direction that is perpendicular to the first direction. The third extension is disposed along a third direction that is opposite to the first direction. The third extension has a width that gradually decreases along the third direction. | 01-28-2016 |
20160027380 | Power Sharing Lines for Powering A Small Form Factor OLED Display Device - An organic light emitting diode (OLED) display device includes a substrate including a circular arc portion and a driving circuit connecting portion connected to the top of the circular arc portion. A circular display area is formed in the circular arc portion. The display area includes a number of OLED pixels, where each OLED pixel connected to one of a number of power lines. A driving power supply line provides a driving voltage for the OLED pixels. The driving power supply line includes a circular shape and is formed around the display area. A number of power sharing lines extend from a lower area of the driving power supply line, where each of the power sharing lines is connected to a different subset of the power lines. | 01-28-2016 |
20160042685 | Display Device - There is provided an active matrix EL display device that can display a clear multi gray-scale color display to reduce the shift in the potential caused by the potential drop due to the wiring resistance of a power source supply line, in order to decrease the unevenness in a display region. A plurality of drawing out ports of the power source supply line are arranged. Further, in the wiring resistance between the external input terminal and the pixel portion power source supply line, potential compensation is performed by supplying potential to the power source supply line by a feedback amplifier. Further, in addition to above structure, the power source supply line may be arranged in a matrix. | 02-11-2016 |