Abstract: There is provided an organic light emitting display device and a method of driving the same. The organic light emitting display device includes pixels, a data driver, a scan driver to sequentially supply scan signals to scan lines, and a control line driver configured to supply emission control signals to emission control line. The data driver is to discharge the gate electrodes of the driving transistors of the pixels at a uniform discharge speed in a third period within a second period, wherein the second period is after the first period, the third period corresponds to a light emitting gray scale of each pixel, and after the second period, the pixels emit light.

Abstract: An organic light emitting display includes a power supply source and a power voltage compensation unit. The power supply source supplies at least a first power voltage to a first power voltage line of the display. The power voltage compensation unit to generate a first compensation power voltage based on the first power voltage and a feedback power voltage from the first power voltage line. The first power voltage compensation unit outputs the first compensation power voltage to the first power voltage line.

Abstract: A display device is disclosed. In one aspect, the device includes a display panel that includes i) a plurality of pixels including first and second light emission control transistors, ii) a first light emission driver configured to generate a first switching control signal, iii) a second light emission driver configured to generate a second switching control signal, iv) a signal controller configured to generate and transfer a first light emission control signal and v) a light emission controller configured to generate and transfer a second light emission control signal. The light emission controller acquires information of a gray depth from a result value obtained by summing gray data, determines a light emission control algorithm according to the gray depth, and generates the second light emission control signal so that the pixels emit light during different light emission periods for a plurality of frames.

Abstract: Luminance correction systems and methods capable of reducing or removing luminance mura of display devices are provided. One luminance correction system includes: a display device including a plurality of pixels, the pixels including a plurality of sub-pixels, each of the pixels comprising at least two of the sub-pixels; an image capturing unit including a plurality of charge-coupled device (CCD) image capturing elements, an n×n arrangement of the image capturing elements corresponding torn of the pixels, n and m being natural numbers greater than or equal to 2; and a luminance correction device configured to generate a representative luminance value with respect to the m of the pixels based on luminance values measured by the n×n arrangement of the image capturing elements, and calculate a correction value with respect to the m of the pixels according to a difference between the representative luminance value and a target luminance value.

Abstract: A display device is disclosed. The device includes a display panel including a plurality of pixels, each connected to a corresponding scan line, a corresponding data line, and a corresponding initialization control line and configured to display an image according to a data signal. The device includes an initialization voltage controller to measure a threshold voltage deviation for driving transistors of the pixels, and to set different initialization voltages for the pixels of each of a plurality of regions.

Abstract: An apparatus and method for compensating an image of a display device are disclosed. The image compensation apparatus of a display device comprises a scatterometer configured to analyze luminance of a display image according to a test initialization voltage and a test data voltage applied to a plurality of pixels and to measure a deviation of a threshold voltage of a driving transistor of the plurality of pixels; a voltage controller configured to divide the display panel into a predetermined area according to a deviation of a threshold voltage of the driving transistor and to calculate different initialization voltages that initialize driving of pixels included in the area on a predetermined area basis; and an initialization voltage supplier configured to apply a corresponding initialization voltage calculated in the voltage controller to the plurality of pixels included in the predetermined area.

Abstract: A display device is provided that can provide sufficient time for threshold voltage compensation of a driving transistor of each pixel during high-speed driving of the display device, and a method for driving the same. A data writing and threshold voltage compensation step of pixels at odd and even-numbered lines are concurrently performed during an extended time period so that the time available for threshold voltage compensation of the driving transistors can be increased.

Abstract: A system for correcting defects on a display panel includes: a signal supplier configured to supply a test signal corresponding to each of a first reference gray level, a second reference gray level, and a third reference gray level to the display panel; a luminance calculator configured to capture an image for each reference gray level displayed on the display panel in response to the test signal and to calculate luminance distribution data of the display panel for each reference gray level; and a correction data calculator configured to calculate correction data based on the luminance distribution data for each reference gray level, wherein the first, second, and third reference gray levels have different gray values, the third reference gray level corresponds to a maximum gray value of gray data input to the display panel, and the correction data increases the maximum gray value of the input gray data.

Abstract: A display device includes: a display panel including scan lines, data lines, and color pixels located at crossing regions of the scan lines and the data lines, each of the color pixels including a driving transistor, the color pixels including first color pixels, second color pixels, and third color pixels; a scan driver configured to transfer a scan signal; a data driver configured to transfer an image data signal; an initialization voltage controller configured to set different initialization voltages for each pixel during each frame according to a threshold voltage deviation for the driving transistor of each pixel and calculate the initialization voltages including first, second, and third initialization voltages corresponding to the plurality of color pixels; an initialization voltage driver configured to apply the calculated first, second, and third initialization voltages; and a signal controller configured to generate and transfer a control signal and the image data signals.

Abstract: There is provided an organic light emitting display device and a method of driving the same. The organic light emitting display device includes pixels, a data driver, a scan driver to sequentially supply scan signals to scan lines, and a control line driver configured to supply emission control signals to emission control line. The data driver is to discharge the gate electrodes of the driving transistors of the pixels at a uniform discharge speed in a third period within a second period, wherein the second period is after the first period, the third period corresponds to a light emitting gray scale of each pixel, and after the second period, the pixels emit light.

Abstract: Luminance correction systems and methods capable of reducing or removing luminance mura of display devices are provided. One luminance correction system includes: a display device including a plurality of pixels, the pixels including a plurality of sub-pixels, each of the pixels comprising at least two of the sub-pixels; an image capturing unit including a plurality of charge-coupled device (CCD) image capturing elements, an n×n arrangement of the image capturing elements corresponding torn of the pixels, n and m being natural numbers greater than or equal to 2; and a luminance correction device configured to generate a representative luminance value with respect to the m of the pixels based on luminance values measured by the n×n arrangement of the image capturing elements, and calculate a correction value with respect to the m of the pixels according to a difference between the representative luminance value and a target luminance value.

Abstract: An organic light emitting display includes a power supply source and a power voltage compensation unit. The power supply source supplies at least a first power voltage to a first power voltage line of the display. The power voltage compensation unit to generate a first compensation power voltage based on the first power voltage and a feedback power voltage from the first power voltage line. The first power voltage compensation unit outputs the first compensation power voltage to the first power voltage line.

Abstract: A system and a method for luminance correction that can remove luminance spots of a display device. The system includes a display device, an image detection unit, and a luminance correction device. The display device includes a plurality of sub-pixels including first sub-pixels and corresponding second sub-pixels. The image detection unit is configured to measure respective luminance values of the first sub-pixels. The luminance correction device is configured to supply test data so that only the first sub-pixels emit light, and to calculate correction values corresponding to the plurality of sub-pixels based on difference values between the respective luminance values measured by the image detection unit and one or more target luminance values.

Abstract: A luminance correction system includes a display device including a display unit with a plurality of first pixels, a plurality of second pixels, and a plurality of third pixels, and a data driver configured to supply a data signal to the plurality of first through third pixels, an image pickup unit configured to generate a first image of first pixels which emit light by receiving a data signal corresponding to gray scale value A, and to generate a second image of the first pixels which emit light by receiving a data signal corresponding to gray scale value B, and a luminance measuring unit configured to measure a first luminance of a pixel to be corrected among the first pixels in the first image, and to measure a second luminance of the pixel to be corrected in the second image.

Abstract: An apparatus includes a controller to generate at least one pulse width modulated (PWM) signal to control a switch connected to a pixel circuit of a display device. The at least one PWM signal controls coupling of a current source or a current sink through the switch to the pixel circuit. When the PWM signal is applied during a first period, the PWM signal has a width sufficient to discharge a pixel capacitor. When the PWM signal is applied during a second period, the PWM signal has a width which is based on a data signal. The pixel circuit controls emission of light with a certain gray scale value based on the data signal.

Abstract: A display device and an image data memory arrangement method thereof are disclosed. When driving one frame with first and second fields, an input data signal is divided into first and second field data and the first and second field data are respectively arranged according to a light emitting driving sequence to control the light emitting for each field to be displayed. The first and second field data signals respectively include a color data signal pattern in which the data signals transmitted to the pixels corresponding to the same pixel column among the pixels respectively included in the first pixel row and the fourth pixel row display the same color, and the data signals transmitted to the pixels corresponding to the same pixel column among the pixels respectively included in the second pixel row and the third pixel row display the same color.

Abstract: An organic light emitting display device and a driving method thereof that can stably compensate for a threshold voltage of a driving transistor. The organic light emitting display device includes pixels positioned at intersection portions (crossing regions) of scan lines and data lines, each pixel including the driving transistor having a gate electrode initialized to a voltage of an initialization power source before a data signal is supplied; power source lines coupled to the pixels in a column direction parallel with the data lines; and an initialization power source generator generating the initialization power source to the pixels via the power source lines. In the organic light emitting display device, the initialization power source generator controls the voltage of the initialization power source supplied to each pixel, corresponding to the gray scale of the data signal to be supplied to the pixel.

Abstract: A display device includes: a display panel including scan lines, data lines, and color pixels located at crossing regions of the scan lines and the data lines, each of the color pixels including a driving transistor, the color pixels including first color pixels, second color pixels, and third color pixels; a scan driver configured to transfer a scan signal; a data driver configured to transfer an image data signal; an initialization voltage controller configured to set different initialization voltages for each pixel during each frame according to a threshold voltage deviation for the driving transistor of each pixel and calculate the initialization voltages including first, second, and third initialization voltages corresponding to the plurality of color pixels; an initialization voltage driver configured to apply the calculated first, second, and third initialization voltages; and a signal controller configured to generate and transfer a control signal and the image data signals.

Abstract: An apparatus and method for compensating an image of a display device are disclosed. The image compensation apparatus of a display device comprises a scatterometer configured to analyze luminance of a display image according to a test initialization voltage and a test data voltage applied to a plurality of pixels and to measure a deviation of a threshold voltage of a driving transistor of the plurality of pixels; a voltage controller configured to divide the display panel into a predetermined area according to a deviation of a threshold voltage of the driving transistor and to calculate different initialization voltages that initialize driving of pixels included in the area on a predetermined area basis; and an initialization voltage supplier configured to apply a corresponding initialization voltage calculated in the voltage controller to the plurality of pixels included in the predetermined area.

Abstract: A display device is disclosed. In one aspect, the device includes a display panel that includes i) a plurality of pixels including first and second light emission control transistors, ii) a first light emission driver configured to generate a first switching control signal, iii) a second light emission driver configured to generate a second switching control signal, iv) a signal controller configured to generate and transfer a first light emission control signal and v) a light emission controller configured to generate and transfer a second light emission control signal. The light emission controller acquires information of a gray depth from a result value obtained by summing gray data, determines a light emission control algorithm according to the gray depth, and generates the second light emission control signal so that the pixels emit light during different light emission periods for a plurality of frames.