Abstract: An organic light-emitting display device and a method of driving the display device are disclosed. A pixel circuit used in the organic light-emitting display device includes a first switching transistor, a second switching transistor and a driving transistor. The first switching transistor switches a data voltage in response to a first control signal. The second switching transistor switches a compensation voltage in response to a second control signal. The driving transistor provides an electric current to an organic light-emitting device in response to the data voltage and the compensation voltage.

Abstract: A display device includes a display panel, a gray scale converter, and a scale factor generator. The display panel includes a plurality of pixels. The gray scale converter is for converting gray levels of pixel data signals of a current frame by multiplying the pixel data signals of the current frame by a scale factor of the current frame. The scale factor generator is for comparing a conversion current value with an overcurrent prevention current value to generate the scale factor of the current frame.

Abstract: An organic light-emitting display device and a method of driving the display device are disclosed. A pixel circuit used in the organic light-emitting display device includes a first switching transistor, a second switching transistor and a driving transistor. The first switching transistor switches a data voltage in response to a first control signal. The second switching transistor switches a compensation voltage in response to a second control signal. The driving transistor provides an electric current to an organic light-emitting device in response to the data voltage and the compensation voltage.

Abstract: One or more embodiments of the present invention relate to a four color image display device. A display device according to an exemplary embodiment of the present invention includes a first pixel adapted to display a first color, a second pixel adapted to display a second color, a third pixel adapted to display a third color, and a white pixel adapted to display a first white. In one aspect, the first to third pixels are adapted to display a second white in combination, and a ratio of the first white and the second white varies according to a gray. Accordingly, a greenish phenomenon of a low-luminance white light in a four color display device may be reduced.

Abstract: In a display device, a signal controller compensates for luminance of an input image signal that corresponds to each of a plurality of pixels in accordance with a luminance compensation coefficient depending on a position of each pixel, and generates a compensation image signal. A data driver generates data signals that correspond to the plurality of pixels in accordance with the compensation image signal, and supplies the data signals to the corresponding pixels, respectively. The luminance compensation coefficient may depend on a magnitude of the input image signal.

Abstract: The present invention relates to an organic light emitting display device and a method for processing image signals thereof.

Abstract: 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.

Abstract: A display device includes a display panel, a gray scale converter, and a scale factor generator. The display panel includes a plurality of pixels. The gray scale converter is for converting gray levels of pixel data signals of a current frame by multiplying the pixel data signals of the current frame by a scale factor of the current frame. The scale factor generator is for comparing a conversion current value with an overcurrent prevention current value to generate the scale factor of the current frame.

Abstract: A display device includes a display unit and a controller, the controller generating and transmitting a scan signal and an image data signal to a scan driver and a data driver, respectively. The controller includes a memory unit storing a look-up table of basic correction amounts for a test image data signal according a comparison result of comparing a measured value of an image of the display unit displaying the test image data signal with a target value of the test image data signal, and a data controller storing data for a modulation coefficient for applying the look-up table to the supplied image data signal, calculating a full correction amount corresponding to the supplied image data signal using the modulation coefficient and the basic correction amount of the look-up table, and outputting a corrected image data signal by correcting the supplied image data signal by the full correction amount.

Abstract: One or more embodiments of the present invention relate to a four color image display device. A display device according to an exemplary embodiment of the present invention includes a first pixel adapted to display a first color, a second pixel adapted to display a second color, a third pixel adapted to display a third color, and a white pixel adapted to display a first white. In one aspect, the first to third pixels are adapted to display a second white in combination, and a ratio of the first white and the second white varies according to a gray. Accordingly, a greenish phenomenon of a low-luminance white light in a four color display device may be reduced.

Abstract: In a display device, a signal controller compensates for luminance of an input image signal that corresponds to each of a plurality of pixels in accordance with a luminance compensation coefficient depending on a position of each pixel, and generates a compensation image signal. A data driver generates data signals that correspond to the plurality of pixels in accordance with the compensation image signal, and supplies the data signals to the corresponding pixels, respectively. The luminance compensation coefficient may depend on a magnitude of the input image signal.

Abstract: The present invention relates to an organic light emitting display device and a method for processing image signals thereof.

Abstract: An organic light-emitting display device and a method of driving the display device are disclosed. A pixel circuit used in the organic light-emitting display device includes a first switching transistor, a second switching transistor and a driving transistor. The first switching transistor switches a data voltage in response to a first control signal. The second switching transistor switches a compensation voltage in response to a second control signal. The driving transistor provides an electric current to an organic light-emitting device in response to the data voltage and the compensation voltage.

Abstract: A display device includes: a plurality of pixels that represent a first color, a second color, a third color, and white; a signal processor that converts input image signals respective to the colors into output image signals respective to the colors plus an output image signal for the white color, calculates a current consumption amount consumed in the pixels based on the output image signals, and compensates the output image signals in accordance with the current consumption amount; and a data driver that converts the output image signals into data voltages and supplies the data voltages to the pixels.

Abstract: A display device includes pixels which represent first, second and third colors and white, a signal controller which operates a white initial luminance value of the white and first, second and third luminance compensation values of the first, second and third colors based on input image signals of the first, second and third colors, generates a white output image signal of the white based on a sum of at least one portion of the first, second and third luminance compensation values and the white initial luminance value, and generates first, second and third output image signals of the first, second and third colors based on remaining first, second and third luminance compensation values, and a data driver which converts the white output image signal and the first, second and third output image signals into data voltages and supplies the data voltages to the pixels to display an image.

Abstract: A color conversion apparatus includes an extraction unit, a summer, a scale vector generation unit, and a multiplier. The extraction unit extracts first white component data and first primary color component data of gray scale, second white component data and second primary color component data of brightness scale in response to gray scale data supplied from the outside. The summer sums the second primary color component data for one frame to calculate a primary color sum, and sums the second white component data for the one frame to calculate a white sum. The scale vector generation unit generates a primary color scale vector and a white scale vector in response to the primary color sum and the white sum. The multiplier multiplies the first primary color component data by the primary color scale vector to output primary color gray scale data scaled thereby, and multiplies the first white component data by the white scale vector to output white gray scale data scaled thereby.