Entries |
Document | Title | Date |
20080198103 | Display device and driving method thereof - Disclosed herein is a display device including: a pixel array unit having pixel circuits arranged in a form of a matrix; and a control unit having a writing scanning unit for outputting, to the sampling transistor, a writing scanning pulse. The control unit effects control to supply a control input terminal of the drive transistor with a fixed potential for a threshold value correcting operation for retaining a voltage corresponding to a threshold voltage of the drive transistor in the storage capacitor. When setting a voltage across the storage capacitor to the threshold voltage of the drive transistor by repeating the threshold value correcting operation a plurality of times on a time division basis, the control unit effects control to perform each the threshold value correcting operation and the sampling transistor to a conducting state. | 08-21-2008 |
20080198104 | Display apparatus, method of driving a display, and electronic device - In a display apparatus including a correction unit and a switching transistor, the correction unit operates in a non-light emission period such that 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. | 08-21-2008 |
20080204378 | Organic electro luminescence display and driving method thereof - An organic electro luminescence display and driving method uses an image determination unit to generate image determination signals indicative of whether images generated in response to data signals are moving images still images, selects a gamma value corresponding to the brightness of the ambient light sensed, applies gamma correction signals corresponding to selected gamma values to control grey level voltages of the data signals, generates a selection signal based on a comparison of a previously set reference value with the photo sensor signal, and generates R′,G′,B′ data to vary an input image RGB data to correspond to the selection signal, varies a change range of the changing R′,G′,B′ data to correspond to the image determination signal, and supplies the varied change range of the changing data (R′,G′,B′ data) to the data driver. | 08-28-2008 |
20080211748 | Display Screen Addressing System - A display device comprising individual elements wherein the placement, on each element, of an electronic microcircuit capable of recognizing its address among those of other microcircuits connected in parallel to the common addressing electrodes, recording the brightness data sent to its address and modulating the brightness of its display element according to the data received. | 09-04-2008 |
20080211749 | Method for Grayscale Rendition in Am-Oled - The present invention relates to a grayscale rendition method in an active matrix OLED (Organic Light Emitting Display) where each cell of the display is controlled via an association of several Thin-Film Transistors (TFTs). In order to improve the grayscale rendition in an AM-OLED when displaying low grayscale levels and/or when displaying moving pictures, it is proposed to split each frame into a plurality of subframes wherein the amplitude of the data signal applied to a cell of the AM-OLED can be adapted to conform to the visual response of a CRT display. According to the invention, the video frame used for displaying an image is divided into N consecutive subframes, with N≧2, and the data signal applied to the cell comprises N independent elementary data signals, each of said elementary data signals being applied to the cell during a subframe. The grayscale level displayed by the cell during the video frame is depending on the amplitude of the elementary data signals and the duration of the subframes. | 09-04-2008 |
20080218456 | Driving circuit and organic light emitting display using the same - Disclosed are a driving circuit and an organic light emitting display using the same, which realizes stable gray levels. The driving circuit includes a first selector that produces a first selection and sub selection signals, and a second selector that produces a second selection and sub selection signals. The driving circuit also includes a first voltage divider and a second voltage divider, each of which receives the selection signals. The first and the second voltage dividers can produce various voltage levels depending on the various combination of the selection signals. | 09-11-2008 |
20080218457 | ORGANIC LIGHT EMITTING DIODE DISPLAY DEVICE AND DRIVING METHOD THEREOF - An organic light emitting diode display device is disclosed. The device includes a brightness controller configured to selectively control a brightness controlling range based at least in part on the magnitude of the video data input in one frame, and a gamma correcting unit configured to control the portion of maximum luminance corresponding to full scale data based on one of first gamma correcting values and second gamma correcting values. | 09-11-2008 |
20080231562 | Organic light emitting display and driving method thereof - An organic light emitting display capable of displaying images of uniform luminance and a method for driving the display are disclosed. The display senses degradation of the organic light emitting diode and threshold and/or mobility of a drive transistor and modifies the data supplied to the pixel according to the sensed parameters. | 09-25-2008 |
20080238837 | IMAGE DISPLAY APPARATUS AND DRIVING METHOD THEREOF - An image display apparatus includes a display having a plurality of light emitting elements. The image display apparatus also includes a controller configured to control displaying an image on the display, wherein the controller is operable to calculate an amount of light output by the plurality of light emitting elements and adjust a luminance level of the display based on the calculated amount of light output. | 10-02-2008 |
20080246701 | Organic light emitting display and its driving method - In an organic light emitting display and its driving method, a pixel portion includes a plurality of pixels which express images corresponding to a scan signal, an emission control signal, and a data signal. A scan driver transfers the scan signal and the emission control signal to the pixel portion. A data driver generates and transfers a plurality of data signals to the pixel portion using video data. A frame memory stores and transfers the video data in frame periods to the data driver. A luminance controller determines a pulse of the emission control signal using frame data, which is a sum of video data stored in the frame memory. A power supply unit supplies voltages of first and second power sources to the pixel portion. The luminance controller determines the number and widths of pulses in the emission control signal corresponding to a sum of the video data. | 10-09-2008 |
20080246702 | Organic light emitting display and driving method thereof - An organic light emitting display includes an organic light emitting display panel, a temperature detecting unit for detecting a temperature of the organic light emitting display panel, a driving voltage determining unit for outputting voltage data by calculating the driving voltage of the organic light emitting display panel on the basis of the temperature data detected by the temperature detecting unit, and a DC/DC converter having a variable resistor determining unit for setting a variable resistor on the basis of the voltage data output from the driving voltage determining unit, the DC/DC converter supplying the driving voltage corresponding to the variable resistor to the organic light emitting display panel. | 10-09-2008 |
20080252572 | Organic electroluminescent display and image correction method thereof - An organic electroluminescent display includes an image signal processor configured to receive an analog image signal from an external source and to convert the analog image signal to a digital image signal, a brightness sensor configured to measure brightness of an external light and to convert the measured brightness into a brightness signal, a wavelength sensor configured to measure wavelength of the external light and to convert the measured wavelength into a wavelength signal, a data controller configured to receive the digital image signal, the brightness signal, and the wavelength signal, and to generate a corrected image signal, a data driver coupled electrically to the data controller, and a display panel configured to receive the corrected image signal from the data controller via the data driver and to display an image. | 10-16-2008 |
20080259007 | METHOD FOR DYNAMICALLY ADJUSTING BRIGHTNESS OF IMAGE - A method for dynamically adjusting the brightness of an image is provided. In the method, a plurality of first pixel values of pixels in a captured display image are converted to a plurality of first brightness values when an application program is executed with a full screen picture. Then, the size and the distribution of the first brightness values are adjusted to obtain a plurality of second brightness values. Afterward, the second brightness values are converted to a plurality of second pixel values with which the pixels of the display image and displayed on the screen are overwritten. Therefore, the brightness of each display image can be dynamically adjusted, which is convenient. | 10-23-2008 |
20080266216 | Organic light emitting display and driving method thereof - An organic light emitting display including a plurality of pixel circuits and a data driver, the organic light emitting display including a power supplier electrically coupled to the organic light emitting display panel, a voltage detecting unit electrically coupled to the organic light emitting display panel and adapted to detect a voltage supplied from the power supplier, and a controller electrically coupled to the voltage detecting unit and adapted to output a control signal to at least one of the power supplier and the data driver based on the detected voltage. | 10-30-2008 |
20080278420 | SOURCE DRIVER AND GAMMA CORRECTION METHOD THEREOF - A source driver and a Gamma correction method thereof with lower layout area and preferred Gamma correction performance are provided. The source driver includes a Gamma correction unit, a latch unit, and a digital-to-analog converter (DAC). The Gamma correction unit receives an original image data, and converts the original image data to a corresponding corrected image data. The latch unit is coupled to the Gamma correction unit. The DAC is coupled to the latch unit, so as to convert the corrected image data to a corresponding analog drive signal. In the Gamma correction method, first, a correction unit to correct an original image data to a corresponding corrected image data is provided, and the corrected image data is converted into a corresponding analog drive signal. | 11-13-2008 |
20080278421 | METHOD FOR UNEVEN LIGHT EMISSION CORRECTION OF ORGANIC EL PANEL AND DISPLAY CORRECTION CIRCUIT OF ORGANIC EL PANEL - A correction method for correcting uneven light emission of an organic EL panel, the correction method includes the steps of: supplying a predetermined signal to the organic EL panel to detect the brightness of the panel at horizontal and vertical scan positions; forming, based on a detection output thereof, correction data adapted to correct uneven brightness of the organic EL panel at a horizontal or vertical display position of the panel; storing the correction data in a memory; and reading the correction data from the memory during viewing to correct the level of a video signal supplied to the organic EL panel. | 11-13-2008 |
20080284692 | METHOD FOR CONTROLLING BACKLIGHT APPARATUS AND LUMINANCE CONTROL CIRCUIT THEREOF - A luminance control circuit including a detection unit, a control unit and a current adjustor is provided. The detection unit detects a working current of each light emitting module and produces detection signals to be transmitted to the control unit. The control unit produces control signals according to the detection signals to be transmitted to the current adjustor. The current adjustor adjusts each of the working currents of each of the light emitting modules according to the control signals. | 11-20-2008 |
20080284693 | ACTIVE MATRIX ORGANIC LIGHT EMITTING DIODE DISPLAY - An improved AM OLED pixel circuit and method of wide dynamic range dimming for AM OLED displays are disclosed that maintain color balance throughout the dimming range, and also maintain the uniformity of the luminance and chromaticity of the display at low gray-levels as the display is dimmed to lower luminance values. As such, AM OLED displays can meet the stringent color/dimming specifications required for existing and future avionics, cockpit, and hand-held military device display applications. Essentially, the OLED pixel circuit and method of dimming that are disclosed use Pulse Width Modulation (PWM) of the OLED pixel current to achieve the desired display luminance. Two example circuits are disclosed that externally PW modulate the common cathode voltage or common power supply voltage to modulate the OLED current in order to achieve the desired display luminance. Three example circuits are disclosed that incorporate additional transistor switches in the pixel circuit to modulate the OLED current during the frame time. By PWM of the OLED current, in combination with data voltage (or current) modulation, wide dynamic range dimming can be achieved while maintaining the color balance and the luminance and chromaticity uniformity required over the surface of the display involved. | 11-20-2008 |
20080291139 | METHOD OF DYNAMICALLY ADJUSTING SCREEN BRIGHTNESS - A method of dynamically adjusting screen brightness is adapted for a screen to adjust the screen brightness. First, an original ambient light level and an original brightness adjustment factor are determined. Then, a relationship curve of an ambient light level and a brightness adjustment factor is determined. The current ambient light level is continuously monitored and compared with the original ambient light level to determine if the current ambient light level is equal to the original ambient light level. If not equal, a brightness adjustment factor corresponding to the current ambient light level is obtained based on the relationship curve, and the screen brightness is adjusted based on the brightness adjustment factor. The obtained screen brightness and the corresponding brightness adjustment factor are set to be the original screen brightness and the original brightness adjustment factor, and thus the background brightness is monitored again and the screen brightness is adjusted. | 11-27-2008 |
20080297451 | Methods and apparatuses for increasing the apparent brightness of a display - Methods and apparatuses to varying the apparent brightness of a display are described. The change in apparent brightness is accompanied by unchanged in relative contrast, rendering a display with higher or lower brightness while maintaining contrast fidelity. In exemplary embodiments, the signals for the middle tone levels are adjusted to increase or decrease the brightness intensity, while keeping constant the gamma correction. This maintains the relative contrast of images while rendering them at a different brightness. Implementations of the present process include an adjusted gamma correction lookup table, incorporated in the video card to modify the video signal before reaching the display. The present invention can be used for matching the brightness of two or more displays or to provide compensation for variations in display characteristics to ensure consistency in display brightness within a data processing model. | 12-04-2008 |
20080303756 | Passive Matrix Display Drivers - This invention generally relates to methods and apparatus for driving passive matrix displays, in particular OLED (Organic Light Emitting Diode) displays. | 12-11-2008 |
20090002285 | IMAGE DISPLAY APPARATUS - An image display apparatus includes an image display unit having a light source and a light modulating unit; a histogram generating unit; a function generating unit; a first brightness calculating unit; a second brightness calculating unit; a first difference calculating unit; a first multiplying unit; a first summation calculating unit; a first brightness gradient calculating unit; a second brightness gradient calculating unit; a second difference calculating unit; a second multiplying unit; a second summation calculating unit; a weighted linear sum calculating unit; a determination unit; a control parameter selecting unit; and a control unit. | 01-01-2009 |
20090002286 | INFORMATION PROCESSING APPARATUS AND METHOD FOR CONTROLLING ORGANIC EL DISPLAY DEVICE - An information processing apparatus includes: an organic EL display device that displays an image with a plurality of pixels; and a controller that controls the organic EL display device to lower a brightness of the organic EL display device from a first brightness to a second brightness and to invert light-emitting pixels and non-light-emitting pixels among the pixels. | 01-01-2009 |
20090015524 | Electro-optical device - An electro-optical device having a plurality of pixels including a plurality of EL elements, wherein the electro-optical device provides a gray scale display by controlling a period of time at which the plurality of the EL elements emit light in one frame period; the plurality of the EL elements have a first electrode and a second electrode; the first electrode is held at a constant potential; and a potential of the second electrode changes in such a manner that a polarity of an EL driving voltage, which is a difference between the potentials applied to the first and second electrodes, is inverted for each one frame period. | 01-15-2009 |
20090021455 | REDUCED POWER CONSUMPTION IN OLED DISPLAY SYSTEM - A method of controlling a passive matrix display having rows and columns of pixels including receiving an input image signal; determining drive signals for at least a first image field and a second image field; calculating a value that is correlated to a change in the total capacitive charge of the pixels that will occur between the display of the first image field and the second image field for at least one column of the passive-matrix, electro-luminescent display; adjusting at least one of the drive signals within first or second image fields to compensate for the change in total capacitive charge; and providing adjusted drive signals for each pixel. | 01-22-2009 |
20090021456 | METHOD OF COLOUR IMAGE PROJECTION USING SPATIAL LIGHT MODULATION AND LIGHT SOURCE MODULATION - The present invention relates to a method of operating a projection system comprising several solid state light sources ( | 01-22-2009 |
20090033601 | Organic light emitting display and its driving method - An organic light emitting display and its driving method includes: a pixel unit divided into a first display region and a second display region; a light emitting control driver outputting in parallel a plurality of light emitting control signals through a plurality of light emitting control lines; a switch unit including a plurality of switches each respectively coupled to one of the plurality of light emitting control lines to switch the transfers of the light emitting control signals to each have a turn-on period and a turn-off period within a period of one frame; and a luminance controller controlling the switching time of the switch unit using image signals and setting the number of switchings of the plurality of light emitting control lines coupled to the first display region differently from that of the plurality of light emitting control lines coupled to the second display region. | 02-05-2009 |
20090033602 | ORGANIC LIGHT-EMITTING DISPLAY DEVICE AND METHOD OF DRIVING THE SAME - An organic light-emitting display for improving an aperture ratio and increasing lifespan includes an organic light-emitting display panel in which pixel cells are formed, a gray-scale converter configured to convert a gray-scale of a pixel data signal by multiplying the pixel data signal which drives the pixel cells by a scale parameter, and a scale parameter generator configured to generate the scale parameter, wherein the scale parameter generator generates a scale parameter of a present frame by increasing or decreasing a scale parameter of a previous frame in proportion to a current difference obtained by subtracting a reference current value from a total current value of the pixel data signal which is gray-scale converted from the previous frame. | 02-05-2009 |
20090040151 | ORGANIC LIGHT EMITTING DISPLAY DEVICE AND DRIVING METHOD THEREOF - A controller to reduced power consumption and/or improve outdoor visibility of an organic light emitting display device, and an organic light emitting display device includes the same. The organic light emitting display device including: a light sensor to generate light sensing signals corresponding to an external light intensity; an image judging unit to generate image judging signals, by judging whether images generated by the data signals are moving images or still images; a signal processor to compare the light sensing signals with preset reference values, to generate selection signals, and to modify image data accordingly; a frame memory to store the image data from the signal processor; and a reset signal driver to reset the frame memory according to the image judging signals and the selection signals. | 02-12-2009 |
20090046042 | Drive Method for Reducing the Power Consumption of a Flat Display - The present invention provides a method to reduce the power consumption. The method comprises these steps. First, the RGB gray levels of a pixel are decided. Then, the RGB gray level values are transformed to XYZ tristimulus values. The XYZ tristimulus values are transformed to L*a*b* values. Next, the L*′a*′b*′ values are determined based on an acceptable color difference range. The color difference between the L*′a*′b*′ and the L*a*b* is in the color difference range. Finally, the L*′a*′b*′ values are transformed to X′Y′Z′ values and the X′Y′Z′ values are transformed to R′G′B′ gray level values. | 02-19-2009 |
20090051628 | ORGANIC LIGHT EMITTING DISPLAY AND DRIVING METHOD THEREOF - An organic light emitting display device includes: a plurality of pixels at crossing portions of data lines, scan lines, and emission control lines; a sensor for sensing degradation information of organic light emitting diodes and mobility information of driving transistors, which are included in each pixel; a converter for storing the degradation information of organic light emitting diodes and the mobility information of driving transistors, which are sensed utilizing the sensor and converting input data to corrected data by utilizing the stored information; and a data driver receiving the corrected data and generating data signals to be supplied. | 02-26-2009 |
20090058770 | Display 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. | 03-05-2009 |
20090066615 | DISPLAY APPARATUS AND DRIVING METHOD THEREOF - A display apparatus comprises: plural light emitting devices emitting light by plural kinds of colors; a driving circuit for each light emitting device; a scanning line selecting the driving circuit; a light emission control line causing the light emitting devices to emit light; and a data line supplying to the selected driving circuit a current signal according to brightness, wherein the driving circuit comprises a driving transistor supplying a current, a first-switch between a gate of the driving transistor and the data line, a second-switch between a drain of the driving transistor and the light emitting device, a first-capacitor having one end connected to the gate of the driving transistor and the other end potential-fixed, and a second-capacitor connected to the gate of the driving transistor and the light emission control line, and a capacitance ratio of the second-capacitor to first-capacitor varies according to the color of the emitted light. | 03-12-2009 |
20090066616 | Display apparatus and driving method for display apparatus - The present invention provides a display apparatus, including: a display section including a plurality of pixels disposed in a matrix and a plurality of signal lines and a plurality of scanning lines; and a horizontal driving circuit and a vertical driving circuit configured to drive the signal lines and the scanning lines of the display section to display an image on the display section; each of the pixels including a light emitting device; a signal level storage capacitor, a writing transistor, and a driving transistor. | 03-12-2009 |
20090073094 | IMAGE DISPLAY DEVICE - To detect reduction of luminous efficiency of respective light-emitting elements arranged in a matrix state while suppressing increase of costs. | 03-19-2009 |
20090073095 | Display device and driving method of display device - The present invention sets a display device for displaying a desired image on a display section, the display section being formed by arranging pixels in a form of a matrix, by outputting a driving signal for a signal line and a writing signal to the signal line and a scanning line of the display section by a horizontal driving circuit and a vertical driving circuit, wherein the pixel includes a light emitting element, a signal level storage capacitor, a transistor for writing. | 03-19-2009 |
20090079678 | Display device and display driving method - A display device includes a display panel unit configured to include pixel circuits in each of which an organic electroluminescence device is used as a light emitting device and is driven to emit light with luminance dependent upon a voltage difference between a signal value voltage of an input display data signal and a signal amplitude reference voltage. The display device further includes: a voltage controller configured to carry out grayscale value detection for a display data signal to be supplied to the display panel unit in every predetermined period, and create voltage control information of the signal amplitude reference voltage by using a detected grayscale value; and a signal amplitude reference voltage changer configured to change a voltage value of the signal amplitude reference voltage to be supplied to the pixel circuits of the display panel unit, based on voltage control information created by the voltage controller. | 03-26-2009 |
20090091520 | DATADRIVER AND METHOD FOR AN OLED DISPLAY - A data driver for an OLED display has a resistor string, digital-to-analog converters and converting transistors. The resistor string provides a set of gamma voltages. Each of the digital-to-analog converters converts an input word into an output voltage selected from the gamma voltages. Each of the converting transistors conducts a driving current and having a gate-to-source voltage determined by the output voltage from one of the digital-to-analog converters. A method of data driving for an OLED display is also disclosed. | 04-09-2009 |
20090096723 | PIXEL DRIVE CIRCUIT FOR ELECTROLUMINESCENT ELEMENT - A pixel circuit including a storage capacitor to which data is written including a black level; a second driving transistor supplies a drive current corresponding to data written to the storage capacitor to a second organic electroluminescence element; a first driving transistor supplies to a first organic electroluminescence element drive current that reflects brightness degradation or current degradation in the second organic electroluminescence element, wherein the second driving transistor supplies a predetermined drive current to the second organic electroluminescence element including data of the black level; and the drive voltage of the first driving transistor is set to a voltage reflecting the brightness degradation or current degradation in the second organic electroluminescence element. | 04-16-2009 |
20090146929 | ORGANIC LIGHT EMITTING DIODE DISPLAY - In an organic light emitting diode display comprising a first pixel and a second pixel that are associated with respective different colors, each of the first and second pixels being for displaying its associated color, each of the first and second pixels comprises: a first electrode; a second electrode facing the first electrode; and a light emitting member formed between the first electrode and the second electrode; wherein the light emitting member of the first pixel comprises: at least two light-emitting elements for emitting light of the color associated with the first pixel; and a charge generation layer between the at least two light-emitting elements; and wherein the second pixel has fewer light-emitting elements than the first pixel. | 06-11-2009 |
20090153447 | LASER LIGHT SOURCE DEVICE, VIDEO DISPLAY DEVICE - A laser light source device which is used for a video display device displaying video by using plural image frame data inputted from an image generating device includes a laser light source emitting laser light, a drive circuit driving the laser light source, a target light amount acquisition unit that acquires a target light amount which is a light amount necessary for displaying the image frame data, an output light amount detecting unit that detects an output light amount of the laser light source device, a control unit that controls the drive circuit so that the output light amount will be the target light amount, and a determination unit that determinates deterioration of the laser light source by using drive conditions of the drive circuit with respect to at least two different target light amounts at the time of control. | 06-18-2009 |
20090160742 | MEASUREMENT OF PIXEL CURRENT IN DISPLAY DEVICE - During image display, pixel current measurement for brightness irregularity correction is carried out. Display is carried out by sequentially writing pixel data in a horizontal direction to pixel sections that are arranged in a matrix shape. Horizontal power supply lines PVDD are arranged for each horizontal line, and power is supplied from these power supply lines to corresponding pixel sections. When carrying out measurement of pixel current by lighting pixel sections one at a time, a horizontal power supply line PVDD of a horizontal line to which the lit pixel belongs is connected to a power supply PVDDb by a switch, and other horizontal power supply lines PVDD are connected to PVDDa. | 06-25-2009 |
20090184900 | Image display device and display device control method - The invention relates to an active matrix image display device consisting of: several light emitters; a current modulator which is connected to each emitter; means for selecting emitters; means for powering the emitters; and an operational amplifier comprising an inverting input a noninverting input and an output. According to the invention, either the noninverting input or the inverting input of the operational amplifier is connected to the output of the power supply means such as to form, together with the modulator gate which is connected to the output of the operational amplifier, a feedback loop for the operational amplifier, when one of the emitters is selected. The invention also relates to a method of controlling one such display device. | 07-23-2009 |
20090184901 | ORGANIC LIGHT EMITTING DISPLAY AND DRIVING METHOD THEREOF - An organic light emitting display includes a pixel unit including a plurality of pixels arranged at intersecting points of data lines, scan lines and light emitting control lines; a temperature sensor provided to measure a temperature of the pixel unit; a first analog/digital converter (first ADC) to convert information of the temperature measured in the temperature sensor into a first digital value; a controller to receive the first digital value outputted from the first ADC and outputting a control signal corresponding to the received first digital value; a sensing unit to extract a degradation level of an organic light emitting diode included in each of the pixels; a second analog/digital converter (second ADC) to receive information of the degradation of the organic light emitting diode extracted from the sensing unit and a control signal outputted from the controller and generating a second digital value corresponding to the information of the degradation of the organic light emitting diode that is varied according to the temperature; a conversion unit to convert an input data (Data) into a correction data (Data′) so as to display an image having uniform luminance regardless of the changes in the degradation level of the organic light emitting diode according to temperature, by using the second digital value outputted from the second ADC; a data driver to receive the correction data (Data′) outputted from the conversion unit and generating data signals to be supplied to the pixels. | 07-23-2009 |
20090184902 | SELF-LUMINOUS DISPLAY DEVICE AND DRIVING METHOD OF THE SAME - A self-luminous display device includes: pixel circuits; and a drive signal generating circuit, wherein each of the pixel circuits includes a light-emitting diode, a drive transistor connected to a drive current path of the light-emitting diode, and a holding capacitor coupled to a control node of the drive transistor, and the drive signal generating circuit generates the drive signal containing a second level signal adapted to stop the light emission without reverse-biasing the light-emitting diode, a first level signal, lower than the second level signal, adapted to reverse-bias the light-emitting diode, and a third level signal, higher than the second level signal, adapted to enable the light-emitting diode to emit light, the drive signal generating circuit supplying the drive signal to the pixel circuits. | 07-23-2009 |
20090189834 | Display with multiple emission layers - A display has light emitting elements, a first driver, a power source, and a second driver. Each light emitting element includes “n” emission layers formed one over another to form a color dot in each pixel. The first driver drives the emission layers to emit light or no light. The power source passes a current through the first driver to the light emitting element. The second driver individually weights the n emission layers and makes the emission layers emit light so that each dot may express a gradation level. | 07-30-2009 |
20090213048 | ORGANIC LIGHT EMITTING DISPLAY DEVICE AND PROCESSING METHOD OF IMAGE SIGNALS THEREOF - The present invention relates to an organic light emitting display device and a method for processing image signals thereof. An organic light emitting display device according to the present invention receives a plurality of input image signals respectively corresponding to the pixels representing a first color, a second color, a third color, and a white color, and converts the input image signals of at least two dots respectively representing the first color to the third color among the input image signals according to a first extension coefficient to generate a plurality of four-color image signals of at least two dots respectively representing the first color, the second color, the third color, and the white color, to respectively sum a distortion amount of a color impression of the four-color image signals of at least two dots, to calculate a partial extension coefficient corresponding to the sum result, and to extension-convert the input image signals of at least two dot according to the partial extension coefficient thereby generating the four-color output image signals of at least two dots. | 08-27-2009 |
20090231245 | LUMINANCE ENHANCEMENT STRUCTURE FOR REFLECTIVE DISPLAY DEVICES - The present invention is directed to luminance enhancement structure for reflective display devices. The luminance enhancement structure comprises grooves and columns, wherein said grooves have a triangular cross-section and a top angle, and said grooves and columns are in alternating order and in a continuous form in one direction. The luminance enhancement structure not only can reduce the total internal reflection, but also especially can enhance the on-axis brightness of a display device. | 09-17-2009 |
20090237334 | CORRECTING BRIGHTNESS VARIATIONS IN ORGANIC ELECTROLUMINESCENT PANEL - An OLED display having a correction circuit for producing corrected image data in response to the first image data and in response to correction data to correct for brightness unevenness due to TFT variations; a memory for storing first image data or correction data; a switch effective in first and second states in response to a function switching signal having first and second conditions, respectively; and circuitry for causing the switch to be in the first state to connect the memory to the image input signal interface and to provide the stored first image data to the panel as the second image data; and for causing the switch to be in the second state to connect the memory to the correction circuit, provide the stored correction data to the correction circuit, and provide the corrected image data to the panel as the second image data. | 09-24-2009 |
20090256785 | DISPLAY DEVICE AND METHOD OF DRIVING THE SAME - A display device and a method of driving the same are provided. The display device includes a scan driver that generates a plurality of scanning signals, a data driver that generates a data voltage, and a plurality of pixels that receive the data voltage according to the scanning signal and that display luminance corresponding to the data voltage. Each pixel receives its own data voltage and a data voltage of other pixels while displaying a black color when its own scanning signal is in a first state, and stops reception of the data voltage and displays luminance corresponding to its own data voltage when its own scanning signal is in a second state. | 10-15-2009 |
20090278773 | ORGANIC LIGHT EMITTING DISPLAY AND METHOD OF DRIVING THE SAME - An organic light emitting display and a driving method thereof, capable of increasing manufacturing yield by widening a range of gamma correction. An exemplary organic light emitting display includes a display region with pixels at crossings of data and scan lines; a gamma correction unit; a gamma correction circuit; a data driver; and a scan driver. The gamma correction unit includes first and second register units for storing first and second gamma correction signals, the second gamma correction signal comprising a corrected first gamma correction signal; a booster unit for correcting the second gamma correction signal to generate a third gamma correction signal; and a multiplexer for selecting the second gamma correction signal or the third gamma correction signal outputted from the booster unit, and for transferring it to the gamma correction circuit. | 11-12-2009 |
20090284451 | DISPLAY DEVICE - A display device includes: a pixel array having a plurality of pixels arranged in a matrix form, each of the pixels including a sampling transistor configured to sample a data potential from a video signal line which is insulated from and intersects a control line in response to the change in potential of the control line, and a light-emitting element configured to emit light at the brightness commensurate with the magnitude of the post-sampling data potential. | 11-19-2009 |
20090284452 | DISPLAY APPARATUS - A display apparatus includes: a light-emitting device which is provided for each pixel and includes terminals; a drive portion for supplying a drive current to the light-emitting device; a voltage detection portion for detecting a voltage increase between the terminals of the light-emitting device; a correction portion for correcting the drive current for the light-emitting device; and a control portion for controlling the drive portion to supply the corrected drive current from the drive portion to the light-emitting device. The correction portion performs, for a pixel in which the detected voltage increase reaches a reference value, a correction to increase the drive current at a predetermined ratio. | 11-19-2009 |
20090309818 | ORGANIC LIGHT EMITTING DISPLAY AND DRIVING METHOD THEREOF - An organic light emitting display includes: scan lines for applying scan signals; control lines for applying control signals; and data lines for applying data signals. The organic light emitting display further includes: pixels coupled to the scan, control and data lines for displaying an image; power supply lines coupled to the pixels; and a data driver for supplying the data signals of the image to the data lines. The organic light emitting display also includes: a power supply driver for swinging a voltage at the power supply lines between a first level and a second level; a sensing unit including a current sink for sinking a first current from the pixels and a current source for supplying a second current to the pixels; and a switching unit for selectively electrically coupling the pixels to at least one of the data driver, the current source or the current sink. | 12-17-2009 |
20100001932 | DISPLAY DEVICE AND DRIVING METHOD THEREOF - In one embodiment of the present invention provides a display device in which the occurrence of luminance unevenness in an electro-optical element due to outside temperature variation or local temperature variation within a display panel is reduced without cost increase or increase in mounting area, and a driving method of the display device. In one example embodiment, a driving transistor flows a driving current in accordance with a signal voltage supplied via a data line, so that gray scale display in accordance with the signal voltage is carried out. An electro-optical element emits light in response to the driving current. The driving transistor is provided with a signal voltage at displaying a center gray scale among all display gray scale levels within a voltage region in which the driving current in a temperature range of 0° C. to 40° C. is in a range of 98% to 102% of a driving current that flows at an average driving temperature. | 01-07-2010 |
20100007587 | METHOD FOR IMPROVING DISPLAY LIFETIME - A method for adjusting the intensity values of colored pixels wherein each pixel has a first subpixel, a second subpixel, and a third subpixel, wherein each of the subpixels emits light of a different color and the lifetime of the first subpixel is lower than the lifetimes of the other colored subpixels, comprising: for each pixel, receiving intensity values corresponding to the intensity of each color subpixel in each pixel; and lowering the intensity value of the first subpixel in each pixel and still providing an acceptable pixel color to an observer. | 01-14-2010 |
20100026613 | Methods for Sequential Color Display by Modulation of Pulses - Each color image is decomposed into at least one series of at least three successive primary images of different primary colors which are successively displayed by modulating the activation duration of the pixels of an imaging device. According to the invention, the distribution of the pixel activation phases in the three successive subframes is contracted: the pixel activation periods of the first primary image are shifted toward the end of the subframe of this first image, and, during the subframe of the third primary image, the pixel activation periods of this third primary image are shifted toward the beginning of the subframe of this third image. Color break-up faults are thus advantageously reduced. | 02-04-2010 |
20100033410 | DISPLAY DEVICE - An image display device comprises a unit which divides one line into a plurality of blocks (blocks A, B, and C) in a horizontal direction and detects in parallel, a unit which collectively detects a plurality of lines (lines A and B) in a vertical direction in parallel. The unit detects a pixel state of a pixel of the block (for example, block A) and a pixel state of the same pixel as an adjacent block (for example, block B), and corrects a variation between the detection result of the block and the detection result of the adjacent block. The unit detects a pixel state of a pixel through the line (for example, line A) and a pixel state of the same pixel through a different line (for example, line B), and corrects a variation between the detection result of the line and the detection result of the different line. | 02-11-2010 |
20100039356 | Driving Method of Display Device - In a display device for displaying gray scales by dividing one frame into a plurality of subframes and using a time gray scale method, pseudo contour is generated. In the case where high-order bits are displayed, gray scales are displayed by sequentially adding the weight (light-emitting period, the frequency of light emission, and the like) of each subframe. Similarly, in the case where low-order bits are displayed, gray scales are displayed by sequentially adding the weight (light-emitting period, the frequency of light emission, and the like) of each subframe. The subframes for the high-order bits and the subframes for the low-order bits are arranged so as not to be concentrated at one portion in one frame. | 02-18-2010 |
20100053043 | COLOR DISPLAY AND METHOD FOR PRODUCING THE SAME - A color display using an organic electroluminescence element, includes, on a substrate, plural pixels each being area-divided into plural sub-pixels including at least two sub-pixels that each emit colored light of different wavelengths and a white sub-pixel, in which the white sub-pixel is further area-divided into at least two sub-sub-pixels that each emit colored light of different wavelengths, wherein the at least two sub-pixels and the at least two sub-sub-pixels each have an organic electroluminescence layer that emits a white light and a color filter. A color display which allows a high definition color display and is easily produced, and a method for producing the color display are provided. | 03-04-2010 |
20100060554 | DISPLAY APPARATUS AND METHOD OF DRIVING THE SAME - In a display apparatus and a driving method thereof, image data corresponding to plural different positions of a display panel are added to each other, and a sum of the image data of a present frame is compared with a sum of the image data of a previous frame to determine whether an image displayed on the display panel is a still image or not. While a still image is displayed, brightness of the display panel is gradually lowered. Accordingly, the display panel may prevent occurrence of afterimages and deterioration of organic electroluminescent light emitting devices, as well as reduce power consumption. | 03-11-2010 |
20100073269 | DISPLAY DEVICE AND ELECTRONIC DEVICE - A display device capable of displaying a picture of vivid colors maintaining a good balance of colors and a good balance of light-emitting brightnesses of the EL elements. The widths of the detour wirings supplying current to the power source feed lines are increased for those EL elements into which a current of a large density flows. This constitution decreases the wiring resistances of the detour wirings, decreases the potential drop through the detour wirings, and suppresses the amount of electric power consumed by the detour wirings. | 03-25-2010 |
20100079361 | DISPLAY DEVICE AND DRIVING METHOD THEREOF - In a pixel of a display device, a first transistor of which an second terminal is connected to a first terminal of a light emitting element supplies a driving current that corresponds to a voltage between a control terminal and the second terminal to the light emitting element, and a second terminal of the light emitting element is connected to a driving voltage. At least one second transistor transmits a black voltage that corresponds to a black gray to the control terminal of the first transistor in a first period and a second period, and transmits a gray voltage that corresponds to an input image signal to the control terminal of the first transistor in a third period. A third transistor is connected between the first terminal of the light emitting element and a voltage supply line to transmit a reference voltage, and the third transistor is turned on in the first period and turned off in the second period. A capacitor is connected between the control terminal and the source of the first transistor, stores a control voltage based on a threshold voltage of the first transistor in the second period, and stores a voltage based on the control voltage and the gray voltage in the third period. | 04-01-2010 |
20100085284 | Method of Driving Electro-Optic Display - A method of driving an electro-optic display includes the following steps. First, a first frame is displayed on pixels at a first time. Next, data of a second frame predetermined to be displayed on the pixels at a second time later than the first time is determined. Next, an eliminating frame showing a first extreme gray level or a second extreme gray level is displayed on the pixels at a third time. Afterwards, a medium frame is displayed on the pixels at a fourth time later than the third time. The third and fourth times are between the first and second times. The gray level shown by each pixel at the fourth time is close to the gray level predetermined to be shown by the same pixel at the second time. Thereafter, the second frame is displayed on the pixels at the second time. | 04-08-2010 |
20100085285 | Display apparatus, display data processing device, and display data processing method - A display apparatus includes: an edge processing section extracting an edge component of a display data signal; a display data signal processing section changing the display data signal according to a level conversion signal and adding the edge component thereto; a level conversion signal generating section changing the level conversion signal according to the display data signal and a signal output from the display data signal processing section; and a display section performing a display operation according to the signal output from the display data processing section. | 04-08-2010 |
20100123651 | METHOD FOR DIMMING ELECTROLUMINESCENT DISPLAY - A method for controlling an electroluminescent display to produce first and second images for display wherein the second image has reduced luminance to reduce burn-in on the display, includes providing the electroluminescent (EL) display having a plurality of EL emitters, the luminance of the light produced by each EL emitter being responsive to a respective drive signal; receiving a respective input image signal for each EL emitter for each of a plurality of frames; transforming the input image signals for a first frame to provide a plurality of first drive signals to produce an image on the display; and transforming the input image signals for a second frame to a plurality of second drive signals using a dimming transform that operates on the input image signals for each frame to provide a peak frame luminance value for the second frame wherein the dimming transform includes an exponential function. | 05-20-2010 |
20100127957 | DISPLAY DEVICE, PICTURE SIGNAL PROCESSING METHOD, AND PROGRAM - There is provided a display device including a display unit having pixels, each of which includes a luminescence element that individually becomes luminous depending on a current amount and a pixel circuit for controlling a current applied to the luminescence element according to a voltage signal, where the pixels are arranged in a matrix pattern. The display device includes a luminescence amount regulator for setting a reference duty for regulating a luminescence amount for each one frame, according to the input picture signal, and an adjuster for adjusting an effective duty that regulates, for each one frame, a luminous time for which the luminescence element is luminous, and a gain of the picture signal, based on the reference duty and the input picture signal, so that the luminescence amount is constant before and after adjustment. | 05-27-2010 |
20100156764 | LINE-SEQUENTIAL DRIVING DISPLAY - A line-sequential driving display that displays an image by exciting phosphor disposed on the rear surface of a face plate, transmitting light emitted from the excited phosphor through the face plate, and emitting the light from the front surface of the face plate. The display includes a light blocking layer disposed closer to the front surface of the face plate than the phosphor, the light blocking layer being configured to control the emission and non-emission of the light from the front surface on the basis of an electrical signal. Upon driving the line-sequential driving display, an area of the light blocking layer above a line-sequential driving selected line enters a light transmitting state and at least part of an area of the light blocking layer above a line-sequential driving unselected line enters a light blocking state. | 06-24-2010 |
20100156765 | Organic light emitting diode display - An organic light emitting diode (OLED) display includes a substrate where OLEDs are formed and an encapsulation member fixed onto the substrate while covering the OLEDs. The encapsulation member includes a photochromic material so that the encapsulation member is colored by external light. | 06-24-2010 |
20100164847 | DISPLAY 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. | 07-01-2010 |
20100194671 | DISPLAY APPARATUS AND IMAGING SYSTEM - Provided is a display apparatus, in which a deterioration of a display device in an icon display region is reduced to lower the occurrence of burn-in. The display apparatus includes multiple pixels each including sub-pixels of red, green, blue and white, which are arranged in matrix and a color operation circuit for converting an image signal into a driving signal for the sub-pixels, in which each of the sub pixels includes an electroluminescence device and the color operation circuit adjusts a luminance ratio between the sub-pixels of red, green and blue and the sub-pixel of white based on a display region. | 08-05-2010 |
20100194672 | COLOR FILTER, METHOD OF FABRICATING THE SAME AND DISPLAY DEVICE - Provided is a color filter that can ensure high productivity by producing all colors in a single process irrespective of colors of pixels and can improve uniformity in the transmittance, color reproduction, and thickness of pixels having their colors. The color filter includes: a substrate; and at least one of light sensitive color developing layers stacked on the substrate, the light sensitive color developing layers having pixel portions, wherein the pixel portions are defined by partial color developing regions formed by exposure and development of the light sensitive color developing layer. | 08-05-2010 |
20100231489 | ORGANIC ELECTROLUMINESCENCE STRUCTURE HAVING A HEIGHT DIFFERENCE BETWEEN SURFACES OF A CONTROL DEVICE AND AN ORGANIC ELECTROLUMINESCENCE DEVICE - An organic electroluminescence structure comprises a first substrate, an organic electroluminescence device, and a control device. Forming either a lifting layer under the control device or a recess under the organic electroluminescence device, or forming both of them, creates a difference between their tops, in order to reduce the dark spots and promote the yield of the end product. The lifting layer preferably has a thickness greater than about 0.5 micro meters and the recess has a depth ranges of about 0.1 micro meters to about 100 micro meters. Alternatively, the height difference between the upper surfaces of the control device and the organic electroluminescence device is controlled to be greater than about 2 micro meters or substantially equal to 2 micro meters. | 09-16-2010 |
20100238093 | Method for Driving Electrophoretic Display Device - An EPD device includes a plurality of pixels, wherein a first pixel is written by a first grey level, a second pixel is written by a second grey level. When the EPD device refreshes the displayed frame, the first pixel and the second pixel are erased individually. After the erasing of first pixel is completed, a third grey level is written to the first pixel immediately. After erasing of the second pixel is completed, a fourth grey level is written to the second pixel immediately. Thus, each pixel is written by their next grey levels immediately after the erasing step so the writing time is reduced and the motion blur of the EPD device when refreshing the displayed frame can be improved. | 09-23-2010 |
20100245217 | CARBAZOLE DERIVATIVE, LIGHT-EMITTING ELEMENT MATERIAL, LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - A carbazole derivative represented by the general formula (1) is provided. In the formula, Ar | 09-30-2010 |
20100259468 | Display apparatus - Disclosed herein is a display apparatus, including, a panel having a plurality of pixels disposed in a matrix and each including a self-luminous element for emitting light, the panel including first to third conductive layers laminated in order on a supporting substrate, a first contact portion between the first and second conductive layers and a second contact portion between the second and third conductive layers being disposed at the same position in a planar direction. | 10-14-2010 |
20100315319 | DISPLAY WITH PIXEL ARRANGEMENT - A display, including a substrate having a display area including first and second non-overlapping pixel groups and a gutter located between the first and second pixel groups, the gutter having a dimension in a first direction separating the first and second pixel groups, and each pixel group includes a plurality of pixels, each pixel having three or more differently colored sub-pixels; and wherein the pixel centers of the pixels in each pixel group are arranged in a regular two-dimensional array having one dimension parallel to the first direction, and wherein the pixels within a pixel group are separated by an inter-pixel separation in the first direction; and one or more electrical elements arranged within the gutter, each subpixel being connected to one of the one or more electrical elements, wherein the gutter dimension is greater than the inter-pixel separation, so that artifacts in a displayed image are reduced. | 12-16-2010 |
20100321281 | EL Display Device and Electronic Device - In an EL display device in which color purity of each of red, blue and green is different, the EL display device displaying an image of a desired balance of red, blue and green is provided. A video signal supplied to each EL element is gamma (γ)-corrected by a correction circuit, the color purity of each of blue luminescence, green luminescence, and red luminescence is suitably controlled in accordance with the voltage and current of the corrected video signal. | 12-23-2010 |
20110140998 | Reading Device - A reading device includes an electronic paper, a frame, a light detector and a light source. The electronic paper is used for displaying a reading data; the frame is used for holding the electronic paper; the light detector is used for detecting the ambient light and generating a detecting signal according to the ambient light; and the light source, located on edge of the frame, is capable of adaptively emitting light according to the detecting signal. | 06-16-2011 |
20110156991 | DISPLAY UNIT - A display unit has an interlayer formed at least as one or more than one layers and arranged between a light-emitting layer and a diffractive element. The interlayer has a thickness not less than 500 nm and not more than 2,000 nm and an average refractive index greater than a refractive index of the light-emitting layer. The optical path length of the interlayer defined as a product of multiplication of its average refractive index by its thickness satisfies the requirement shown below: | 06-30-2011 |
20110234477 | ORGANIC LIGHT EMITTING DEVICE, LIGHTING APPARATUS, DISPLAY APPARATUS AND METHOD FOR MANUFACTURING THE ORGANIC LIGHT EMITTING DEVICE - According to one embodiment, an organic light emitting device includes: a base material having flexibility; an organic light emitting element provided on the base material; and a protection film that covers the organic light emitting element. The protection film includes: a first inorganic layer that is provided on the organic light emitting element, and covers the organic light emitting element; a flexible layer that is provided on the first inorganic layer, contains an organic polymer, and has flexibility; and a second inorganic layer that is provided on the flexible layer, and covers the flexible layer. | 09-29-2011 |
20120154259 | PULSE GENERATOR AND ORGANIC LIGHT EMITTING DISPLAY USING THE SAME - A pulse generator that is capable of improving (e.g., increasing) the rising and falling speeds of its pulses. The pulse generator includes a third switch and a first diode serially coupled between a first power source and a data line; a fourth switch and a second diode serially coupled between the data line and a second power source configured to have a voltage lower than that of the first power source; a pulse controller for increasing a voltage of the data line to a voltage higher than that of the first power source or for reducing the voltage of the data line to a voltage lower than that of the second power source; and a first capacitor coupled between the pulse controller and the data line. | 06-21-2012 |
20120162052 | ELECTRO-LUMINESCENCE PIXEL, PANEL WITH THE PIXEL, AND DEVICE AND METHOD FOR DRIVING THE PANEL - An electro-luminescence display having a plurality of pixels is disclosed. One of the pixels of the electro-luminescence display includes an electro-luminescence diode electrically connected between first and second voltage sources; first and second thin film transistors adjusting an amount of current flowing to the electro-luminescence diode; and a control circuit complementarily operating the first and second thin film transistors in an active mode and a refresh mode. | 06-28-2012 |
20120223874 | DISPLAY DEVICE AND ELECTRONIC APPLIANCE - A display device having a light emission time necessary for performing impulse-type display which is suitable for motion image display comprises a resistor element including a first terminal and a second terminal, a transistor including a gate terminal which is electrically connected to a signal line, and a source terminal and a drain terminal, one of which is electrically connected to a power supply line, a capacitor element including a first terminal and a second terminal, one of which is electrically connected to one of the first terminal and the second terminal of the resistor element and the other of the source terminal and the drain terminal of the transistor, a light-emitting element including a first terminal and a second terminal, one of which is electrically connected the other of the first terminal and the second terminal of the resistor element. | 09-06-2012 |
20120242563 | DISPLAY DEVICE AND ELECTRONIC DEVICE - It is an object of the present invention to provide a display device in which a reverse current sufficient enough to insulate a short-circuited point flows and a transistor using amorphous silicon is used is applied. The display device includes a switching transistor that controls an input of a video signal, a driving transistor that controls a current flowing in a forward direction to a light emitting element, and an AC transistor that controls a current flowing in a reverse direction to the light emitting element; and a reverse bias current can be applied to the light emitting element. Furthermore, the above-described transistors are N-channel transistors. | 09-27-2012 |
20120280894 | Organic light-emitting display device - An organic light-emitting display device including: pixels on a first surface of a substrate, each pixel having a first region and a second region; pixel circuit units in the first region, each pixel circuit unit including at least one TFT; a first insulation film covering the pixel circuit units; first electrodes on the first insulation film, each first electrode being independently disposed in the first region and electrically connected to each pixel circuit unit; a second insulation film covering at least part of the first electrodes; a second electrode facing the first electrodes, the second electrode being electrically connected throughout the pixels and formed in at least the first region; an organic film between the first electrodes and the second electrode; a sealing member facing the first surface of the substrate; and a reflection preventing film on a second surface of the substrate. | 11-08-2012 |
20120293398 | DISPLAY DEVICE AND METHOD OF DRIVING A DISPLAY DEVICE - Write in of lower significant bits of a digital video signal to a memory is eliminated by a memory controller of a signal control circuit in a display device during a second display mode in which the number of gray scales is reduced, as compared to a first display mode. Further, read out of the lower significant bits of the digital video signal from the memory is also eliminated. The amount of information of digital image signals input to a source signal line driver circuit is reduced. Corresponding to this operation, a display controller functions to make start pulses and clock pulses input to each driver circuit have a lower frequency, and write in periods and display periods of sub-frame periods participating in display are set longer. | 11-22-2012 |
20130027281 | SELF-LUMINOUS DISPLAY DEVICE AND DRIVING METHOD OF THE SAME INCLUDING A LIGHT EMISSION INTERRUPTION PERIOD DURING A LIGHT EMISSIN ENABLED PERIOD - A self-luminous display device includes: pixel circuits; and a drive circuit, wherein each of the pixel circuits includes a light-emitting diode, a drive transistor connected to a drive current channel of the light-emitting diode, and a holding capacitor coupled to a control node of the drive transistor, the drive circuit applies a light emission enabling bias to the light-emitting diode after correcting the drive transistor and writing a data voltage to the control node, provides, during a light emission enabled period in which the light emission enabling bias is applied, a light emission interruption period adapted to change the light emission enabling bias to a non-light emission bias with the data voltage held by the holding capacitor, and performs a light emission disabling process, adapted to reverse-bias the light-emitting diode to stop the light emission, for a constant period after the light emission enabled period. | 01-31-2013 |
20130069852 | LIGHT-EMITTING COMPONENT DRIVING CIRCUIT AND RELATED PIXEL CIRCUIT AND APPLICATIONS - A pixel circuit related to an organic light-emitting diode (OLED) is provided. When signals having appropriate operation waveforms are supplied, the circuit configuration (7T1C or 5T1C) of the pixel circuit keeps the current flowing through an OLED unaffected by the impact of IR drop on a power supply voltage Vdd (or mitigates the impact of the power supply voltage Vdd on the current) and prevents the current flowing through the OLED from changing with the Vth shift of a TFT for driving the OLED. Thereby, the luminance uniformity of an OLED display adopting the pixel circuit is greatly improved. | 03-21-2013 |
20130093652 | ORGANIC LIGHT-EMITTING DISPLAY DEVICE - An organic light-emitting display device includes: an organic light-emitting panel comprising a plurality of pixel regions, each pixel region comprising a scan line and a data line crossing each other, each pixel region further comprising an organic light-emission element and a drive transistor configured to drive the organic light emission element; and a circuit configured to sense a threshold voltage of the drive transistor in a sensing interval and control a light emission of the organic light emission element within the pixel region in a display interval. | 04-18-2013 |
20130093653 | ELECTRO-OPTICAL DEVICE, DRIVING METHOD OF ELECTRO-OPTICAL DEVICE AND ELECTRONIC APPARATUS - An electro-optical device includes a first storage capacitor that has a first electrode and a second electrode, and a second storage capacitor that has a third electrode and a fourth electrode, and a first pixel circuit. The first pixel circuit includes a first transistor having a first gate, a first drain, and a first source, an electro-optical element, a second transistor through which a first data line is electrically connected to the first gate during the second transistor is in an on-state, and a third transistor through which the first gate is electrically connected to the first drain or the first source. The second electrode and the third electrode are electrically connected to the first data line. | 04-18-2013 |
20130113690 | METHOD OF DRIVING ELECTRO-OPTIC DEVICE AND ELECTRO-OPTIC DEVICE - A driving method of an electro-optic device is capable of sufficiently providing a threshold voltage compensation time of a driving transistor and a data writing time. A driving method of an electro-optic device including a first power source, a second power source, data lines, scan lines, signal lines, and pixel circuits, includes: a first step in which a light emitting element is in a non-light-emitting state, and a second transistor is turned on by a change of a pulse applied to a signal line; and a second step in which the scan line is sequentially and exclusively selected after the second transistor is turned on, a third transistor including a gate connected to a selected scan line is turned on, and a corresponding data voltage is written to a first node from the data line through the third transistor. | 05-09-2013 |
20130113691 | IMAGE DISPLAY DEVICE - An image display device includes a plurality of pixels, and feeders that commonly supply power to the plurality of pixels. In this image display device, each of the pixels has a light-emitting portion that emits light by a current supplied to the light-emitting portion, a driver that controls light emission of the light-emitting portion, and a switching portion electrically connected to the driver. The parasitic capacitance of the switching portion is determined with respect to each one pixel or one group of pixels according to the voltage drop of said feeder. | 05-09-2013 |
20130154908 | DISPLAY APPARATUS AND DRIVING METHOD THEREOF - A display apparatus comprises: plural light emitting devices emitting light by plural kinds of colors; a driving circuit for each light emitting device; a scanning line selecting the driving circuit; a light emission control line causing the light emitting devices to emit light; and a data line supplying to the selected driving circuit a current signal according to brightness, wherein the driving circuit comprises a driving transistor supplying a current, a first-switch between a gate of the driving transistor and the data line, a second-switch between a drain of the driving transistor and the light emitting device, a first-capacitor having one end connected to the gate of the driving transistor and the other end potential-fixed, and a second-capacitor connected to the gate of the driving transistor and the light emission control line, and a capacitance ratio of the second-capacitor to first-capacitor varies according to the color of the emitted light. | 06-20-2013 |
20130201088 | Organic Electro Luminescence Display Device - An organic electro luminescence display device includes a display panel including a plurality of pixels arranged at intersections of m columns and n rows, a data driver unit configured to generate data signals and to provide the data signals to the pixels, and a gate driver unit configured to generate a first luminescence control signal, a second luminescence control signal, and scan signals, wherein the scan signals are sequentially provided to the pixels by a row unit, the first luminescence control signal is provided to the pixels via the left-most side of the pixels of the display panel, and the second luminescence control signal is provided to the pixels via the right-most side of the pixels of the display panel. | 08-08-2013 |
20130241810 | IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - An image processing apparatus includes an image display unit and a luminance control unit. The image display unit includes pixels arranged in a matrix, each of which is formed of a first sub-pixel, a second sub-pixel, a third sub-pixel, and a fourth sub-pixel, and performs image display. The luminance control unit adjusts a ratio between a generation amount of first luminance generated by the first sub-pixel, the second sub-pixel, and the third sub-pixel and a generation amount of second luminance generated by the fourth sub-pixel. Over all input tones, the luminance control unit makes the generation amount of the second luminance lower than the generation amount of the first luminance and generates the second luminance so that a function representing a luminance value of the second luminance is continuous. | 09-19-2013 |
20130241811 | ELECTROLUMINESCENT DEVICE AGING COMPENSATION WITH MULTILEVEL DRIVE - An electroluminescent (EL) device with aging compensation has a luminance and a chromaticity that both correspond to the density of the current and the age of the EL emitter. Different black, first and second current densities are selected based on the measured age, each corresponding to emitted light colorimetrically distinct from the light emitted at the other two current densities. Respective percentages of a selected emission time are calculated for each current density to produce a designated luminance and chromaticity. The current densities are provided to the EL emitter for the calculated respective percentages of the emission time so that the integrated light output of the EL emitter during the selected emission time is colorimetrically indistinct from the designated luminance and chromaticity, no matter the age of the EL emitter. | 09-19-2013 |
20130257698 | ELECTRO-OPTICAL DEVICE AND ELECTRONIC APPARATUS - An electro-optical device includes one or more control lines that include a scanning line, a data line and a pixel circuit. The pixel circuit has a drive transistor, a write-in transistor with a gate which is electrically connected to the scanning line, a light-emitting element that emits light at a brightness that depends on the size of a current that is supplied through the drive transistor, and a control line which overlaps the gate of the drive transistor when viewed from a direction that is perpendicular to a surface of a substrate on which the pixel circuit is formed is included in the one or more control lines. | 10-03-2013 |
20130314305 | PIXEL CIRCUIT, LIGHT EMITTING DIODE DISPLAY USING THE SAME AND DRIVING METHOD THEREOF - A pixel circuit of a light emitting diode display includes a light emitting diode, six transistors and two capacitors. The effect of the variation of the threshold voltage of the transistor in the pixel circuit on the display quality can be improved through supplying specific the first to fourth control signals and the first to third reference voltages to the pixel circuit. A light emitting diode display using the aforementioned pixel circuit and a driving method of the aforementioned pixel circuit are also provided. | 11-28-2013 |
20130314306 | DISPLAY DEVICE - A display device includes: a pixel array unit with pixel circuits disposed in matrix form, the pixel circuit including a driving transistor, an electro-optic element, a storage-capacitor, and a sampling transistor, with the electro-optic element emitting light by generating a driving current based on information stored in the storage-capacitor at the driving transistor to be applied to the electro-optic element; and a control unit, of which the output stage includes a buffer transistor, to output a pulse signal for driving the pixel array unit from the buffer transistor; wherein the pixel array unit and the control unit are formed with long laser beam irradiation to be scanned in the vertical direction; and with the control unit, buffer transistors for outputting a pulse signal for sampling to an input video signal to each signal line are arrayed in a column in the longitudinal direction of the laser beam irradiation. | 11-28-2013 |
20130328752 | DISPLAY DEVICE, DRIVING METHOD THEREOF, AND ELECTRONIC APPARATUS - A display device comprises a pixel array unit including a plurality of pixels, and power supply lines and a power supply scanner for supplying a power supply voltage switching between first and second potentials to each of the power supply lines, wherein each of the pixels includes a light emitting element, a sampling transistor, a driver transistor, and a holding capacitor. The sampling transistor samples a signal potential to be held in the holding capacitor, the driver transistor receives a supply of a current from the power supply scanner through the power supply line at a first potential and flows a drive current to the light emitting element in accordance with the held signal potential, and the power supply scanner changes the power supply line from the first potential to the second potential before the sampling transistors samples the signal potential. | 12-12-2013 |
20130328753 | DISPLAY APPARATUS - A pixel circuit has a first capacitor having a first terminal connected with a gate of a driving transistor; a second capacitor connected between a second terminal of the first capacitor and a source of the driving transistor; a first switch applying a reference voltage to a node at which the first capacitor and the second capacitor are connected; a second switch supplying an image signal voltage to the gate of the driving transistor; a third switch supplying an initialization voltage to a drain of the driving transistor and a fourth switch supplying current to the drain of the transistor for emitting light from the current light emitting device. | 12-12-2013 |
20140015738 | Light Emitting Device, Method of Driving a Light Emitting Device, Element Substrate, and Electronic Equipment - A display device capable of obtaining a constant luminance without being influenced by temperature change is provided as well as a method of driving the display device. A current mirror circuit composed of a first transistor and a second transistor is provided in each pixel. The first transistor and second transistor of the current mirror circuit are connected such that their drain currents are kept almost equal irrespective of the level of load resistance. By controlling the OLED drive current using the current mirror circuit, a change in OLED drive current due to fluctuation in characteristics between transistors is avoided and a constant luminance is obtained without being influenced by temperature change. | 01-16-2014 |
20140035797 | DISPLAY UNIT, DRIVE CIRCUIT, DRIVING METHOD, AND ELECTRONIC APPARATUS - A display unit includes: a pixel circuit including a display element, a first transistor having a gate and a source, and a capacitor inserted between the gate and the source, the first transistor supplying a current to the display element; and a drive section driving the pixel circuit, through sequentially performing first and second driving operations, the first driving operation allowing the drive section to apply a pixel voltage to a first terminal and allowing a second terminal to be at a first voltage, the pixel voltage determining luminance of the display element, the first and second terminals being one and the other of the gate and the source of the first transistor, respectively, and the second driving operation allowing the second terminal to be at a second voltage, through applying the pixel voltage to the first terminal and allowing a current to flow through the first transistor. | 02-06-2014 |
20140035798 | DISPLAY PANEL, DISPLAY DEVICE AND ELECTRONIC APPARATUS - A display device includes pixel circuits disposed in rows and columns. A first pixel circuit is configured to emit light of a first color, and a second pixel circuit is configured to emit light of a second color, with the first color preferably being green. A given signal line provides a first image data signal and a second image data signal respectively to the first pixel circuit and the second pixel circuit within a horizontal scanning period, with the first pixel circuit receiving the first image data signal before the second pixel circuit receives the second image data signal. | 02-06-2014 |
20140049456 | DISPLAY DEVICE AND ELECTRONIC EQUIPMENT - A display device including: a pixel array section; power supply lines; and auxiliary electrodes, wherein each pixel has an auxiliary capacitance, and one of electrodes of the auxiliary capacitance is connected to the source electrode of the drive transistor, and another electrode is connected to the auxiliary electrode for the pixel. | 02-20-2014 |
20140055326 | ACTIVE MATRIX PIXEL BRIGHTNESS CONTROL - A multiple pixel display and method of driving same. Each pixel in the display has a light emitting element and a drive current controller. A control terminal of the drive current controller receives an intensity control input and drives the light emitting element with an amount of electrical current based upon the intensity control input. Each pixel also has a voltage storage device that is charged with a programmed voltage between with a first terminal that is electrically coupled to the control terminal, and a second terminal that is electrically opposite the first terminal of the voltage storage device. An intensity reduction input of each pixel is electrically coupled to the second terminal of the voltage storage device and to respective intensity reduction inputs of other pixels within the plurality of pixels. | 02-27-2014 |
20140055327 | Organic Electroluminescent Display Device and Method of Driving the Same - An organic electroluminescent display device includes an organic electroluminescent diode receiving a driving voltage and a first ground voltage; first and second driving thin film transistors for providing a driving current to the organic electroluminescent diode; a first switching thin film transistor receiving a data voltage and switched by an nth scan signal; a second switching thin film transistor switched by a current providing signal; a third switching thin film transistor receiving a second ground voltage and switched by a selection signal; a fourth switching thin film transistor disposed among an output terminal of the second switching thin film transistor; and a first capacitor disposed among the output terminal of the first switching thin film transistor, the gate terminal of the first driving thin film transistor and the gate terminal of the second driving thin film transistor. | 02-27-2014 |
20140071028 | PIXEL, DISPLAY DEVICE COMPRISING THE SAME AND DRIVING METHOD THEREOF - An organic light emitting diode (OLED) display device is disclosed. In one aspect, the device includes a plurality of pixels. Each of the pixels includes 1) a driving transistor controlling a driving current supplied to an OLED, 2) a first capacitor connected to a first electrode of the driving transistor and 3) a switching transistor connecting the first capacitor and the data line. Each pixel further includes a first light emission transistor transmitting a first power source voltage to the first electrode of the driving transistor and a second capacitor connected between the gate electrode of the driving transistor and the first power source voltage. When the first power source voltage is applied to the first electrode of the driving transistor, the corresponding scan signal of a gate-on voltage is supplied and thus the corresponding data voltage is stored in the first capacitor. | 03-13-2014 |
20140078027 | DISPLAY PANEL AND DISPLAY APPARATUS COMPRISING THE SAME - A display panel and a display apparatus having the display panel are disclosed. The display panel includes: a substrate having a flat panel shape; a light output layer disposed on the substrate and outputting light by an electrical drive; and a semiconductor layer including a plurality of switching elements arranged in a matrix form and switching based on a driving signal for driving the light output layer, and a plurality of lines to transmit the driving signal to the plurality of switching elements, wherein each of the lines extends with a predetermined width, a first width of the line at a central portion thereof in a lengthwise direction thereof is thicker than a second width thereof at one end portion thereof in the lengthwise direction. | 03-20-2014 |
20140078028 | PIXEL UNIT DRIVING CIRCUIT, PIXEL UNIT DRIVING METHOD AND PIXEL UNIT - A pixel unit driving circuit, a pixel unit driving method and a pixel unit, which can improve the problems of OLED panel luminance uniformity and luminance decreasing caused by material aging. The pixel unit driving circuit includes a driving TFT (DTFT), a matching TFT (MTFT), a first switching element ( | 03-20-2014 |
20140091992 | DISPLAY APPARATUS - A display device which includes a substrate having a pixel unit that receiving first and second voltages is disclosed. In one aspect, the first and second power lines are coupled to the first and second voltages, and are supplied to the pixel unit via first and second power pads. In some aspects, the first and second power pads are alternately disposed while being spaced apart from each other in at least a portion of the peripheral area, and the second power pads are disposed in the space between the respective first power pads. | 04-03-2014 |
20140111405 | GAMMA SETTING PATTERN OF ORGANIC LIGHT EMITTING DISPLAY DEVICE AND GAMMA SETTING METHOD USING THE SAME - A gamma setting pattern of an organic light emitting display device and a gamma setting method using the same, which can be applied to even a small screen and improve accuracy of gamma setting. The gamma setting pattern includes a grayscale display region and a circumference pattern. The grayscale display region is disposed at the center of a screen, and emits light corresponding to one of a plurality of predetermined grayscale values for setting a gamma value. The circumference pattern is disposed at the circumference of the grayscale display region, and has luminance varied corresponding to the grayscale displayed in the grayscale display region and a predetermined panel current amount. | 04-24-2014 |
20140111406 | ELECTROLUMINESCENT DISPLAY PANEL AND DRIVING METHOD THEREOF - An electroluminescent display panel includes a plurality of sub-pixels; a plurality of scan lines, each of the scan lines being electrically connected to a first row of sub-pixels and a second row of sub-pixels of two adjacent rows; a plurality of first data lines electrically connected to the first rows of sub-pixels of corresponding columns respectively; a plurality of second data lines electrically connected to the second rows of sub-pixels of corresponding columns respectively; a scan driving unit for outputting a plurality of scanning signals; and a data driving unit for outputting a plurality of dada signals; wherein the scanning signals sequentially turn on two adjacent rows of sub-pixels via the scan lines, the data signals on the first data lines charge the first rows of sub-pixels of the corresponding columns, and the data signals on the second data lines charge the second rows of sub-pixels of the corresponding columns. | 04-24-2014 |
20140118228 | ORGANIC LIGHT EMITTING DISPLAY DEVICE AND METHOD OF GENERATING GRAY SCALE VOLTAGE IN THE ORGANIC LIGHT EMITTING DISPLAY DEVICE - A method of generating a gray scale voltage in an organic light emitting display device includes setting a gamma table, based on the emission of light with a first luminance level by a screen displayed in a pixel unit of the light emitting display device, and implementing a gamma reference voltage lookup table (LUT) in which voltage values of red, green and blue data corresponding to each gray scale and luminances at the first luminance level are recorded based on the gamma table; selecting a second luminance level different from the first luminance level; fixing a specific gray scale corresponding to a low gray scale region as a reference gray scale, actually measuring, at the second luminance level, a voltage corresponding to the fixed reference level; and generating gray scale voltages corresponding to the second luminance level through a plurality of set gamma reference voltages. | 05-01-2014 |
20140139410 | MULTIPLE LIGHT MANAGEMENT TEXTURES - An optoelectronic device providing improved light management is provided. The optoelectronic device includes a substrate having a substantially flat surface, a light management layer provided on the flat surface, such that the light management layer includes a first light management texture. The optoelectronic device also includes a planarization layer on the first light management texture. The planarization layer has a top surface that is defined by a first portion and a second portion, such that the first portion is a substantially flat surface and the second portion includes a second light management texture corresponding to the first light management texture. Further, the second light management texture has dimensions relatively less than that of the first light management texture and the first light management texture and the second light management texture enable light management in a waveguide mode and a surface plasmon polariton (SPP) mode respectively. The optoelectronic device also includes a functional stack over the planarization layer, such that the second light management texture propagates into the functional stack. | 05-22-2014 |
20140159996 | METHOD 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. | 06-12-2014 |
20140176402 | LIGHT EMITTING DIODE DISPLAY DEVICE - An LED display device includes a first scan switching element between a data line and a first node, a first voltage transfer switching element between a first drive voltage line and the first node, a first detection switching element between second and third nodes, a first driving switching element between the first drive voltage line and the third node, a first emission control switching element between the third node and a first LED, a second scan switching element between the data line and the second node, a second voltage transfer switching element between the first drive voltage line and the second node, a second detection switching element between the first node and a fourth node, a second driving switching element, a second emission control switching element between the fourth node and a second LED, and a common capacitor between the first node and the second node. | 06-26-2014 |
20140176403 | SELF-LUMINOUS DISPLAY DEVICE, CONTROL METHOD OF SELF-LUMINOUS DISPLAY DEVICE, AND COMPUTER PROGRAM - There is provided a self-luminous display device including a deterioration amount acquisition section configured to acquire a cumulative deterioration amount for each of a plurality of pixels arranged in a matrix shape on a screen, each of the pixels including a light emitting element which emits light by itself in accordance with a current amount, a deterioration amount calculation section configured to calculate a deterioration amount when an image is displayed based on a supplied video signal in each of the pixels by using a deterioration characteristic determined in accordance with a luminance of the video signal, and a cumulative information update section configured to reflect the cumulative deterioration amount acquired by the deterioration amount acquisition section in the deterioration amount calculated by the deterioration amount calculation section, and to update the reflected cumulative deterioration amount as a new cumulative deterioration amount. | 06-26-2014 |
20140184478 | DISPLAY DEVICE - To reduce the number of sub-frames and perform high resolution display with low power consumption, each of the pixels has a digital emission period Td and an analog emission period Ta, and is driven in a time-divided fashion in a digital manner or in an analog manner. Each of the pixels performs high resolution display when being driven in an analog manner, and performs display with low power consumption when being driven in a digital manner. | 07-03-2014 |
20140204004 | DISPLAY DEVICE WITH POWER SOURCE SUPPLY SCAN CIRCUITS CONDUCTING NEGATIVE FEEDBACK AND DRIVING METHOD THEREOF - A display device includes a pixel array unit having pixels disposed in a matrix shape, each pixel including an electro-optical element, a write transistor for sampling and writing an input signal voltage, a holding capacitor for holding a signal voltage written by the write transistor, and a driver transistor for driving the electro-optical element in response to the signal voltage held in the holding capacitor. The display device further includes a scan circuit for selectively scanning each pixel in the pixel array unit at a row unit basis, and a plurality of power source supply scan circuits for selectively supplying a first potential and a second potential lower than the first potential to power supply line wired per each pixel row of the pixel array unit to supply current to the driver transistors, synchronously with scanning by the scan circuit. | 07-24-2014 |
20140218272 | DISPLAY UNIT, METHOD OF DRIVING THE SAME, AND CONTROL PULSE GENERATION DEVICE - A display unit includes a pixel group having pixels. Each of the pixels includes a light emitting section and a drive circuit. The pixel group is divided into P pieces of pixel blocks. The display unit is configured to allow the light emitting sections from the light emitting sections configuring the respective pixels in a first pixel block of the P pieces of pixel blocks to the light emitting sections configuring the respective pixels in a P-th pixel block of the P pieces of pixel blocks to sequentially emit light together on a pixel block basis, and when the light emitting sections configuring the respective pixels in pixel blocks of the P pieces of pixel blocks emit light, configured to allow the light emitting sections configuring the respective pixels in remaining pixel blocks of the P pieces of pixel blocks not to emit light. | 08-07-2014 |
20140218273 | DISPLAY DEVICE AND ELECTRONIC EQUIPMENT - A display device includes a pixel array section, the pixel array section having pixels arranged in a matrix form, at least one of the pixels including an electro-optical element, a write transistor, a holding capacitance, a drive transistor, and a switching transistor. A write scan line is disposed for each pixel row of the pixel array section and adapted to convey a write signal to be applied to the gate electrode of the write transistor. The wiring structure of the write scan line does not intersect with the wiring pattern connected to the gate electrode of the drive transistor. | 08-07-2014 |
20140232622 | Current Source Circuit, A Signal Line Driver Circuit and a Driving Method Thereof and a Light Emitting Device - A current source circuit includes current sources that are each configured to receive an external set signal and to control an output current value based on the external set signal. A changing over circuit that is electrically connected to the current sources and a set of output lines selects one of the current sources to be electrically connected to each of the output lines. | 08-21-2014 |
20140232623 | COMPENSATION TECHNIQUE FOR LUMINANCE DEGRADATION IN ELECTRO-LUMINANCE DEVICES - A method and system for compensation for luminance degradation in electro-luminance devices is provided. The system includes a pixel circuit having a light emitting device, a storage capacitor, a plurality of transistors, and control signal lines to operate the pixel circuit. The storage capacitor is connected or disconnected to the transistor and a signal line(s) when programming and driving the pixel circuit. | 08-21-2014 |
20140306868 | SYSTEM AND METHODS FOR EXTRACTING CORRELATION CURVES FOR AN ORGANIC LIGHT EMITTING DEVICE - A system determines the efficiency degradation of organic light emitting devices (OLEDs) in multiple array-based semiconductor devices having arrays of pixels that include OLEDs. The system determines the relationship between changes in an electrical operating parameter of the OLEDs and the efficiency degradation of the OLEDs in each of the array-based semiconductor devices, uses the determined relationship for a selected one of the array-based semiconductor devices to determine the efficiency degradation of the OLEDs, and compensates for the efficiency degradation. The relationship between changes in an electrical operating parameter of the OLEDs and the efficiency degradation of the OLEDs in the array-based semiconductor devices may be determined by the use of a test OLED associated with each of the devices. | 10-16-2014 |
20140306869 | TRANSITION METAL COMPLEX HAVING ALKOXY GROUP, ORGANIC LIGHT-EMITTING DEVICE USING SAME, COLOR CONVERSION LIGHT-EMITTING DEVICE USING SAME, LIGHT CONVERSION LIGHT-EMITTING DEVICE USING SAME, ORGANIC LASER DIODE LIGHT-EMITTING DEVICE USING SAME, DYE LASER USING SAME, DISPLAY SYSTEM USING SAME, LIGHTING SYSTEM USING SAME, AND ELECTRONIC EQUIPMENT USING SAME - The transition metal complex is represented by Formula (1) [where M represents a transition metal element; K and L each represent a monodentate or bidentate ligand; m and o each represent an integer from 0 to 5; n represents an integer from 1 to 3; X, Y, R1, R2, and R4 each represent a hydrogen atom, alkyl, cycloalkyl, heterocycloalkyl, aryl, heteroaryl, aralkyl, alkenyl, alkynyl, or alkoxy; R3 represents a hydrogen atom, alkyl, cycloalkyl, heterocycloalkyl, aryl, aralkyl, heteroaryl, alkenyl, alkynyl, aryloxy, or alkoxy having two or more carbon atoms; and A represents alkyl, cycloalkyl, heterocycloalkyl, aryl, heteroaryl, aralkyl, alkenyl, alkynyl, or alkoxy]. | 10-16-2014 |
20140313110 | DISPLAY DEVICE - A display device includes plural pixel circuits; a red color filter that transmits a red light, a blue color filter that transmits a blue light, and a green color filter that transmits a green light. Each of the plural pixel circuits includes a light emission area that outputs a white light of brightness corresponding to an input image signal. The light emission area of the pixel circuit that receives the image signal indicative of the brightness of white among the plural pixel circuits is covered with the red color filter, the blue color filter, and the green color filter. | 10-23-2014 |
20140340290 | DISPLAY DEVICE AND CONTROL METHOD THEREOF - Each of a plurality of pixel circuits included in the display device includes: a drive transistor; a first capacitive element having a first terminal connected to a source terminal of the drive transistor; a first switching element which switches between a gate terminal of the drive transistor and a data line; a second switching element which switches between a gate terminal of the drive transistor and a second terminal of the first capacitive element; a third switching element which switches between the second terminal of the first capacitive element and a reference voltage line; a fourth switching element which switches between a first power source line and the source terminal of the drive transistor; and a light-emitting element having a first terminal connected to a drain terminal of the drive transistor and having a second terminal connected to a second power source line. | 11-20-2014 |
20140354520 | ORGANIC EL DISPLAY DEVICE - In an organic EL display device, pixels constituted by sub-pixels of red (R), green (G), blue (B) and white (W) are formed without using a color filter. RGB sub-pixels of RGBW sub-pixels constituting a pixel include only respective light-emitting regions of respective corresponding colors. A W sub-pixel is configured such that a plurality of partial regions constituted by different types of light-emitting regions are arranged adjacent to each other, and that the plurality of partial regions are driven by a common pixel circuit. | 12-04-2014 |
20140361963 | Luminous display and method for controlling the same - A luminous display includes pixels arranged in rows and columns Control signals that are used for controlling first switches for measuring parameters of pixel cells in a first row are also used to control second switches for programming pixel cells in a second row. In this way it is possible to use a single control signal for selecting one pixel cell for programming and simultaneously selecting another pixel cell for measuring. Programming and measuring are thus performed in a time staggered manner, while the addressing is moved to the respective next row. The programming is preferably voltage programming In one embodiment the current through the pixel cell that is currently programmed is interrupted. In another embodiment the measuring is performed only after the transient current into signal holding means coupled to current control means has set. | 12-11-2014 |
20140368414 | CAPACITOR, DRIVING CIRCUIT COMPRISING THE CAPACITOR, AND DISPLAY DEVICE COMPRISING THE DRIVING CIRCUIT - According to exemplary embodiments of the present disclosure, a capacitor may be connected to a gate electrode of a transistor. The capacitor includes a first gate electrode connected to the gate electrode of the transistor, a gate insulation layer formed on the first gate electrode, and an upper electrode formed on the gate insulation layer. The upper electrode is formed to cover a region where the first gate electrode and the upper electrode are overlapped. The capacitor is applicable to at least one of a light emitting driving circuit and a scan driving circuit, and at least one of the light emitting driving circuit and the scan driving circuit may be included in a display device. | 12-18-2014 |
20140368415 | THRESHOLD VOLTAGE SENSING CIRCUIT OF ORGANIC LIGHT-EMITTING DIODE DISPLAY DEVICE - The present invention relates to a technique for outputting threshold voltages by properly changing the threshold voltages such that the threshold voltages can protect low-voltage driving elements within an analog to digital converter when the threshold voltages of an OLED display panel are sensed and outputted to the analog to digital converter. The present invention comprises: a sampling capacitor which samples threshold voltages sensed and inputted from an organic light-emitting diode on a display panel; a charge-sharing capacitor which charges and shares the threshold voltages sampled from the sampling capacitor, or solely charges the threshold voltages to bypass the threshold voltages; and a sample-and-hold unit which has a plurality of switches for performing switching operations for the sampling operation of the sampling capacitor and the charging and the sharing of the charge-sharing capacitor, and scales the threshold voltages to threshold voltage areas having a certain value or less. | 12-18-2014 |
20140375532 | Multiple Display-Units LED Light Device has Special Light Effects - The Multiple Display-units LED light device has special light effects which means the more than one of display-unit can be assembly into one viewing product install within the base by certain strength or assembly means which has the prong means or other unlimited power source mans to supply the electric signal to the said LEDs to make the eye-catching light effects. The display unit may have the build-in input-end or separated input-end to allow to match the said receptacle means of the base. The base with LED related circuit, prong means and other control means, IC means may disposed into the base or incorporated with sealed-unit to make the light beam to be seen by viewer though the viewing area for dedicated art, word, signal, data, design, motion liquid, 3 dimensional, geometric design, art, digital data, liquid crystal screen, LCD and colored image with color change LEDs for illumination. | 12-25-2014 |
20150009106 | DISPLAY APPARATUS - A display apparatus including: a unit pixel including sub-pixels, each sub-pixel including an emission area including a light emitting element and a circuit area including a switching transistor to control the light emitting element; a scan line extending in a first direction and connected to the unit pixel; a branch line extending from the scan line in a second direction crossing the first direction, and connected to the each of the sub-pixels; and data lines extending in the second direction and respectively connected to the sub-pixels. | 01-08-2015 |
20150009107 | DISPLAY APPARATUS AND CONTROL METHOD FOR REDUCING IMAGE STICKING - A display apparatus is provided. The display apparatus includes a display configured to include a plurality of pixels and to display an image frame by emitting light from the plurality of pixels by pixel, and a controller configured to adjust one of pixel brightness and a light emitting time for at least a portion of the plurality of pixels according to properties of the input image frame, and compensate the luminance of the image frame by adjusting the other one of the pixel brightness and the light emitting time to correspond to the adjusted pixel brightness or adjusted light emitting time. | 01-08-2015 |
20150015466 | PIXEL ARRAY, DISPLAY AND METHOD FOR PRESENTING IMAGE ON THE DISPLAY - The present disclosure provides a pixel array, a display including the pixel array and a method for presenting an image on the display. The pixel array is composed of a plurality of basic pixel units repeated in horizontal and vertical directions. Each of the basic pixel units includes a first pixel point, a second pixel point and a third pixel point arranged from top to bottom. The first pixel point is composed of a first sub-pixel and a second sub-pixel located in two horizontal rows. The second pixel point is composed of a third sub-pixel and a first sub-pixel located in two horizontal rows. The third pixel point is composed of a second sub-pixel and a third sub-pixel located in two horizontal rows. With the solutions of the present disclosure, accuracy and yield of evaporation and image resolution may be improved. | 01-15-2015 |
20150035735 | ORGANIC LIGHT EMITTING DISPLAY - An organic light emitting display includes a display panel including sharing pixel groups each including at least one unit pixel, a gate driving circuit generating sensing signals for initializing the unit pixels, and a data driving circuit which generates an initialization voltage to be applied to the unit pixels and outputs the initialization voltage through a plurality of initialization voltage supply channels. When the sensing signals each having a pulse width of N horizontal periods (where N is a positive integer equal to or greater than 2) are shifted while overlapping each other by (N−1) horizontal period, N initialization voltage supply channels are assigned to a plurality of vertically adjacent sharing pixel groups. N sharing pixel groups, being driven to overlap each other in response to the sensing signals, among the vertically adjacent sharing pixel groups are connected to different initialization voltage supply channels. | 02-05-2015 |
20150042545 | DISPLAY DEVICE AND DRIVING METHOD THEREOF - A pixel is divided into m (m is an integer of m≧2) sub-pixels, and an area ratio of an s-th (s is an integer of 1 to m) sub-pixel is to be 2 | 02-12-2015 |
20150054721 | ORGANIC LIGHT EMITTING DISPLAY DEVICE AND DRIVING METHOD THEREOF - The described technology relates generally to an organic light emitting display and a method for driving the same. According to an exemplary embodiment, an image is displayed by dividing one frame into a plurality of sub-fields, and a gamma curve is realized with a combination of a plurality of sub-fields respectively corresponding to a plurality of grays of image data so that image data can be compensated without adding a memory. In addition, the embodiment can extract the one combination by setting a combination of sub-fields that exceeds one frame time among the plurality of sub-fields to be an exception condition. | 02-26-2015 |
20150054722 | ELECTRO-OPTICAL DEVICE - An optoelectronic device includes a first transistor, a second transistor, and a control circuit. The first transistor is electrically connected between a power supply and a light-emitting element, has a gate to receive a gray scale voltage, and supplies the light-emitting element with a driving current corresponding to the gray scale voltage. The second transistor has a gate electrically connected to an electrode of the light-emitting element and a source or drain electrically connected to a circuit including a voltmeter. The control circuit reads a measurement value of the voltmeter when the gate of the first transistor receives the gray scale voltage, and corrects a next gray scale voltage applied to the gate of the first transistor based on the measurement value. | 02-26-2015 |
20150061981 | ORGANIC LIGHT EMITTING DISPLAY DEVICE - Disclosed is an organic light emitting display device which is capable of rapidly sensing a characteristic variation in a pixel including an organic light emitting diode and a driving transistor. The organic light emitting display device may include a display panel including a pixel formed adjacent to each crossing area of gate and data lines, and a sensing line provided in parallel to the data line and connected with the pixel. The device includes a data driver provided with a sensing data generator for sensing a characteristic variation of the pixel through the sensing line and generating sensing data based on the characteristic variation of the pixel for a sensing mode. The sensing data generator generates the sensing data for the pixel by converting current flowing from the pixel to the sensing line into voltage, and converting the voltage to a digital representation using an analog-to-digital conversion method. | 03-05-2015 |
20150070255 | GATE DRIVING CIRCUIT AND DISPLAY DEVICE HAVING THE SAME - A gate driving circuit includes plural-stage output circuits, an Nth stage output circuit of the plural-stage output circuits includes an Nth stage shift register and a mixer. The Nth stage shift register is configured to output an Nth pulse signal. The mixer is coupled to the Nth stage shift register and an (N+M)th stage shift register, for respectively outputting a first clock signal and a predetermined pulse signal during different periods according to the Nth pulse signal and an (N+M)th pulse signal of the (N+M)th stage shift register. Wherein pulse widths or phases of the first clock signal and the predetermined pulse signal are different, and N and M are positive integers. | 03-12-2015 |
20150077316 | DISPLAY DEVICE - In a display device having a display area in which a plurality of pixels are formed to display an image, each of the plurality of pixels includes a brightness control layer that controls brightness of the pixel by light emission, and a light emission color control layer that controls a light emission color in the pixel by controlling a transmission wavelength band of a light emitted from the brightness control layer to be transmitted, and a light emission color control signal for controlling the transmission wavelength band to control the light emission color in the pixel is input to the light emission color control layer in each pixel. | 03-19-2015 |
20150091784 | NON-LINEAR GAMMA COMPENSATION CURRENT MODE DIGITAL-ANALOG CONVERTOR AND DISPLAY DEVICE INCLUDING THE SAME - A non-linear gamma compensation current mode digital-analog converter includes: a first digital-analog converter block configured to: receive a digital signal, a first reference voltage, and a gamma adjustment voltage, and provide a reference current to a ground, wherein a first current flowing to a first current output terminal is determined according to the digital signal and the gamma adjustment voltage; and a second digital-analog converter block configured to: receive the digital signal, a second reference voltage, and a ground voltage, and provide the first current to the first digital-analog converter, wherein a second current flowing to a second current output terminal is determined according to the digital signal and the first current. | 04-02-2015 |
20150091785 | FLAT PANEL DISPLAY - A flat panel display is disclosed. In one aspect, the flat panel display includes a plurality of pixels arranged in rows and columns. The pixels include red, green, and blue pixels. The green pixels are formed to be spaced apart in the row and column directions such that at least two neighboring green pixels are indistinguishable at a predetermined viewing distance. | 04-02-2015 |
20150097764 | DRIVING METHOD FOR DIMMING AN ORGANIC LIGHT-EMITTING DIODE (OLED) DISPLAY - A driving method for dimming an organic light-emitting diode (OLED) display is disclosed. In one aspect, the method includes selecting a dimming mode indicating a maximum luminance to be displayed by the OLED display based on an input and determining a luminance range from a plurality of luminance ranges. The determined luminance range comprises the maximum luminance of the dimming mode. The method also includes performing at least one of converting image data based at least in part on the dimming mode or controlling a duty ratio of an emission control signal, wherein the performing is based at least in part on the determined luminance range. | 04-09-2015 |
20150097765 | DATA CONVERSION UNIT AND METHOD OF CONVERTING DATA - A data conversion unit includes a gamma conversion unit configured to generate a first gamma data by gamma-converting a first data supplied from an outside thereof, a representative luminance value calculation unit configured to calculate a representative luminance value of an entire panel, based on the first gamma data, a subtraction unit configured to subtract the calculated representative luminance value from gamma conversion values of respective pixels included in the first gamma data, a compensation unit configured to generate a second gamma data by converting the gamma conversion values of the respective pixels, based on the subtracted values corresponding to the respective pixels, and an inverse gamma conversion unit configured to generate a second data by inverse-gamma-converting the second gamma data. | 04-09-2015 |
20150109188 | ACTIVE MATRIX ORGANIC LIGHT EMITTING DIODE PIXEL STRUCTURE - An active matrix organic light emitting diode pixel (AMOLED) pixel structure includes a plurality of sub pixels, wherein at least one of the sub pixels comprises two secondary sub pixels, and the secondary sub pixels are disposed with organic light emitting materials with different light emitting characteristics respectively, so that lights emitted from the secondary sub pixels are mixed to adjust the performance of the sub pixels. | 04-23-2015 |
20150123884 | ORGANIC LIGHT EMITTING DISPLAY APPARATUS - An organic light emitting display apparatus includes: an emission pixel including a pixel circuit coupled to a first voltage line configured to apply a first voltage and to transmit the first voltage according to a logic level of a data signal applied in units of a subfield, and a plurality of sub-light-emitting devices coupled to the pixel circuit and configured to receive the first voltage to emit light; a dummy pixel coupled to the first voltage line or a second voltage line configured to apply a second voltage having a level higher than that of the first voltage; and a repair line coupling a first sub-light-emitting device among the plurality of the sub-light-emitting devices separated from the emission pixel to the dummy pixel to provide a pathway for transmitting the first voltage or the second voltage to the first sub-light-emitting device according to a logic level of a dummy data signal. | 05-07-2015 |
20150123885 | DISPLAY DEVICE - When a previously existing technique is applied to a white OLED, such a structure is adopted that the peak wavelength of the intensity of interference is the emission peak wavelength corresponding to blue or less. However, in this case, the intensity of interference of the wavelength range corresponding to red is reduced to decrease the light emission intensity of red. A display device is configured in which a stacked film configuring a white light emitting element (an organic light-emitting diode element) is configured in such a manner that the peak wavelength of the intensity of interference is the peak wavelength of the light emission intensity corresponding to blue or less. The light emission intensity of the light emitting element corresponding to a red pixel is made greater than the light emission intensity of the light emitting elements corresponding to pixels for other colors. | 05-07-2015 |
20150145757 | DISPLAY PANEL DRIVING METHOD, DISPLAY APPARATUS, DISPLAY PANEL DRIVING APPARATUS AND ELECTRONIC APPARATUS - A display panel driving method for controlling the total light emitting period length within a one-field period includes placing a first light emission period, a second light emission period, and a third light emission period within the one-field period, and adjusting, in a state in which a period length from a starting timing of the first light emission period to an ending timing of the third light emission period is at least 25% and at most 75% of a one-field period length, a first no-light emission period between the first light emission period and the second light emission period and a second no-light emission period between the second light emission period and the third light emission period. | 05-28-2015 |
20150294619 | LIGHT EMISSION CONTROL DRIVER, LIGHT EMISSION CONTROL AND SCAN DRIVER AND DISPLAY DEVICE - The present application relates to a light emission control and scan driver and a display device having the drivers. A light emission control and scan driver includes a plurality of driver stages for outputting light emission control signals and scan signals, each of which including: a light emission control driving unit for providing control signals to the scan units and a scan driving unit. Control signals may be light emission control signals. The light emission control driving unit has a first input signal terminal, a first clock terminal, a second clock terminal and a light emission control output terminal, and outputs light emission control signals at the light emission control output terminal based on input signals input at the first input signal terminal, light emission timing control signals input at the first clock terminal and inverted light emission timing control signals input at the second clock terminal. | 10-15-2015 |
20150325174 | Organic Light Emitting Diode Display Device and Driving Method Thereof - An organic light emitting diode display device is disclosed which includes: a scan switch controlled by a scan pulse on a gate line and connected between a data line and a first node; a driving switch which includes a gate electrode connected to the first node, a source electrode connected to a second node, and a drain electrode connected to a first driving voltage line; a sensing switch controlled by a sensing control signal and connected between the second node and a third node on a sensing line; and an organic light emitting diode connected between the second node and a second driving voltage line. | 11-12-2015 |
20150339969 | METHOD AND APPARATUS FOR SUBPIXEL RENDERING - Method and apparatus for subpixel rendering. In one example, for each of an array of pixels on a display, a first signal including a first set of components is received. The first set of components are converted to a second set of components. The second set of components include a first component representing a first attribute of the pixel and a second component representing a second attribute of the pixel. The second set of components of the first signal are modified to generate a second signal by applying at least one operation to at least one of the first and second components based on the corresponding attribute of the pixel. The modified second set of components are converted to a modified first set of components of the second signal. A third signal is generated based on the modified first set of components for rendering subpixels corresponding to the pixel. | 11-26-2015 |
20150348465 | DISPLAY DEVICE - A display device includes: a display panel for displaying frames during an elapse of time; and an emission driver for providing first and second emission power sources to the display panel, wherein: each of the frames comprises a first light emitting period, a light non-emitting period and a second light emitting period according to a time sequence, a difference value between the first and second emission power sources is substantially equal to or greater than a reference value during the first and second light emitting periods, and is less than the reference value during the light non-emitting period, and the difference value between the first and second emission power sources decreases over an elapse of time during the first light emitting period, and increases over an elapse of time during the second light emitting period. | 12-03-2015 |
20150364076 | ORGANIC LIGHT-EMITTING DIODE DISPLAY - An organic light-emitting diode display is disclosed. In one aspect, the display includes a display panel including a plurality of pixels, a scan driver configured to provide a scan signal to the pixels, and a data driver configured to provide a data signal to the pixels. The display also includes a power supply configured to provide first and second power voltages, respectively having first and second voltage levels, to the pixels, wherein the power supply is further configured to substantially periodically change the second voltage level, and wherein the second voltage level is less than the first voltage level. The display also includes a controller configured to control at least one of the scan driver, the data driver, and the power supply. | 12-17-2015 |
20150364089 | ORGANIC LIGHT-EMITTING DIODE (OLED) DISPLAY AND METHOD OF SETTING INITIALIZATION VOLTAGE IN THE SAME - An organic light-emitting diode (OLED) display is disclosed. In one aspect, the display includes a display panel including a plurality of pixels, each of the pixels including an OLED and a driving transistor, the OLED configured to emit light based on an emission current, the driving transistor configured to control the emission current based on a data signal applied to a gate electrode of the driving transistor. The display also includes a power supply configured to apply a driving voltage to the pixels, apply an initialization voltage to a first electrode of the OLED, control the driving voltage within a first range, and control the initialization voltage such that a voltage difference between the driving voltage and the initialization voltage is substantially constant. | 12-17-2015 |
20150364091 | DISPLAY DEVICE AND METHOD OF DRIVING DISPLAY DEVICE - A display device and method of driving the display device are disclosed. In one aspect, the display device includes a display panel including a plurality of pixels and a scan driver configured to apply a scan signal having activation and deactivation levels to the pixels. Each of the pixels includes a storage capacitor, a switching transistor, a driving transistor and an emitting element configured to emit light based on an emission current received from the driving transistor. The scan driver is configured to selectively control the activation level of the scan signal so as to control the amount of charge stored in the storage capacitor. The driving transistor is configured to control the emission current based on the amount of charge stored in the storage capacitor. | 12-17-2015 |
20160093250 | ORGANIC LIGHT-EMITTING DIODE PIXEL STRUCTURE - An OLED (organic light-emitting diode) pixel structure comprises a substrate, first and second control components, first, second, and complementary electrode layers, and first and second light-emitting layers. The first and second control components are disposed above the substrate and electrically coupled to, respectively, the first and second electrode layers. There are first and second neighborhoods defined in the pixel structure, and the substrate traverses both of the neighborhoods. The first electrode layer is disposed in the first neighborhood and comprises a reflective layer. The first light-emitting layer is disposed on and electrically coupled to the first electrode layer. The second electrode layer is transparent and disposed in the second neighborhood. The second light-emitting layer is disposed on and electrically coupled to the second electrode layer. The complementary electrode layer is disposed on and electrically coupled to the light-emitting layers. | 03-31-2016 |
20160098954 | ORGANIC LIGHT EMITTING DISPLAY AND DEGRADATION COMPENSATION METHOD THEREOF - An organic light emitting display can include a display panel including pixels, a degradation sensing circuit to sense a threshold voltage of organic light emitting diodes (OLEDs) in the pixels and calculate an average degradation value based on the sensed threshold voltage of the OLEDs, a compensation target adjustor to adjust a compensation target based on the average degradation value, when the average degradation value is reduced by a previously determined reference value, and a data modulator to add and subtract a luminance compensation value determined depending on the adjusted compensation target to and from input digital video data and modulate the input digital video data. Also, each time the average degradation value is reduced by the previously determined reference value, the compensation target adjustor reduces stepwise the compensation target in conformity with changes in the average degradation value, and a stepwise adjustment width of the compensation target is non-uniform. | 04-07-2016 |
20160098955 | PIXEL DRIVING CIRCUIT - A pixel driving circuit includes first to seventh switches, a capacitor and a light emitting unit. The first and sixth switches are connected and receive data voltage and second reference voltage according to second and third control signals, respectively. One capacitor end connects to the serial-connected first and sixth switches and the other capacitor end connects to a control end of the second switch. The serial-connected third and fourth switches are connected between the control and first end of the second switch. The third and fourth switches are ON by the second control signal. The fifth switch is ON by a first control signal. An end of the fifth switch connects to the serial-connected third and fourth switches and another end receives a first reference voltage. The seventh switch is connected between the second switch and the light emitting unit. The seventh switch is ON by the third control signal. | 04-07-2016 |
20160098956 | ORGANIC LIGHT EMITTING DISPLAY DEVICE - An organic light emitting display device includes a display area and a non-display area. The display area includes display pixels at crossing areas of data lines, scan lines, and emission control lines. The non-display area includes auxiliary pixels at crossing positions of auxiliary data lines, scan lines, and emission control lines. The display device also includes a scan driver to supply scan signals to the scan lines, a first data driver to supply data voltages to the data lines, a second data driver to supply an auxiliary data voltage to the auxiliary data line, and a demultiplexer between the data lines and the first data driver. | 04-07-2016 |
20160140897 | DISPLAY DEVICE - A display device. A display including a display panel configured to include a plurality of active pixels and a plurality of dummy pixels, which are formed near the active pixels, a control driver configured to control a pixel driving circuit formed in each of the active pixels and a dummy driving circuit formed in each of the dummy pixels, wherein each of the pixel driving circuits of the active pixels includes a pixel driving transistor and each of the dummy driving circuits of the dummy pixels, which are formed at either end of the display panel in a first direction, is electrically connected at a first dummy node thereof and includes a dummy driving transistor and a first dummy capacitor, which connects a control terminal of the dummy driving transistor and the first dummy node. | 05-19-2016 |
20160148572 | ORGANIC LIGHT-EMITTING DISPLAY APPARATUS AND METHOD OF DRIVING THE SAME - An organic light-emitting display apparatus including at least one pixel including an OLED, a first transistor connected to a connection line, a second transistor connected to a power line, and to the first transistor, a third transistor connected to a data line, a fourth transistor connected to the third transistor, and to the first transistor, a fifth connected to the fourth transistor, a sixth transistor connected to the fifth transistor, and to the fifth transistor, a seventh transistor connected to the fifth transistor, and to the OLED, and first and second capacitors connected between electrodes of the fourth and fifth transistors, respectively. | 05-26-2016 |
20160163247 | ORGANIC LIGHT-EMITTING DISPLAY PANEL AND METHOD OF MANUFACTURING THE SAME - An organic light-emitting display panel includes a first display region including a plurality of first sub-pixels and a second display region including a plurality of second sub-pixels. Each of the sub-pixels includes a pixel circuit having a driving transistor to output driving current to an output node based on a data signal, a storage capacitor to store a voltage difference between the driving voltage and the gate voltage of the driving transistor, a switching transistor to transfer the data signal to the driving transistor, and a light-emitter connected to emit light based on the driving current. An overlap area of the gate electrode of the driving transistor and an anode electrode of the light-emitter in the first sub-pixel is smaller than an overlap area of the gate electrode of the driving transistor and an anode electrode of the light-emitter in the second sub-pixel. | 06-09-2016 |
20160189610 | DISPLAY DEVICE, PIXEL DRIVING CIRCUIT AND DRIVING METHOD THEROF - There provides a display device, a pixel driving circuit and a driving method thereof. The pixel driving circuit includes an organic light emitting diode, a first, a second and a third switching transistor, a storage capacitor, a driving transistor, a compensation unit and a reset unit. The first switching transistor writes a data signal into the storage capacitor via the driving transistor and the compensation unit; the second switching transistor applies a driving voltage to the driving transistor; the third switching transistor applies a driving current output from the driving transistor to the organic light emitting diode; the compensation unit writes a threshold voltage of the driving transistor into the storage capacitor; the storage capacitor stores a written voltage signal and apply it to the driving transistor; and the reset unit resets the organic light emitting diode and the storage capacitor. | 06-30-2016 |
20160379569 | PIXEL AND ORGANIC LIGHT-EMITTING DIODE (OLED) DISPLAY HAVING THE SAME - A pixel and an organic light-emitting diode (OLED) display having the same are disclosed. In one aspect, a pixel includes an OLED including an anode and a cathode and configured to emit light corresponding to data signals applied during first and second frame periods. Each of the first and second frame periods includes a first discharge period and a light-emitting period subsequent to the first discharge period. The pixel also includes a pixel circuit configured to control light emission of the OLED, apply a first voltage to the anode during the light-emitting period, apply a second voltage to the cathode, the second voltage having a voltage level less than that of the first voltage, and apply a third voltage to the anode so as to discharge the anode during the first discharge period. The second voltage has different voltage levels during the first and second frame periods. | 12-29-2016 |