Abstract: A display device includes a display panel including a plurality of pixels, a current sensor that senses a sensing current that flows through the pixels, and a data compensator. The data compensator calculates a target current from an image frame of input image data using a current deviation for each position of the image frame and a current contribution ratio for each color of the image frame, and that generates a scale factor by comparing the target current and the sensing current. The display device further includes a timing controller that generates output image data by scaling grayscale values of the input image data using the scale factor; and a data driver that provides a data signal corresponding to the output image data to the pixels.

Abstract: A display device includes: a display panel including a pixel; a scan driver configured to provide a first scan signal and a second scan signal to the pixel; and a controller configured to provide a first scan control signal for generating the first scan signal and a second scan control signal for generating the second scan signal to the scan driver, wherein the second scan signal includes an active pulse in an active period having a constant time length and at least one dummy pulse in a vertical blank period having a variable time length, and wherein an interval between the active pulse and a first dummy pulse of the second scan signal is different from an interval between the first dummy pulse and a second dummy pulse of the second scan signal.

Abstract: A display device includes a display panel including a pixel, a data driver which provides a data voltage to the pixel, a scan driver providing first and second scan signals to the pixel, and a controller which controls the data driver and the scan driver. The controller includes a first selection block which selects one of a data compensation method and a scan compensation method as a first method by determining whether an image includes a ghost, a second selection block which selects one of the data compensation method and the scan compensation method as a second method by determining a luminance of the image, a third selection block which selects one of the data compensation method and the scan compensation method as a third method by determining a frequency difference, and a determination block which determines one of the first to third methods as a luminance compensation method.

Abstract: A display device includes a display panel and a display panel driver. The display panel includes pixels. The display panel driver determines an average image load of input image data, determines an operation mode based on a grayscale value of the input image data and the average image load as a first operation mode or a second operation mode, applies a first scale factor to the input image data in the first operation mode, applies a second scale factor different from the first scale factor to the input image data in the second operation mode, and drives the display panel.

Abstract: A display device includes a display panel, a driving controller, and a voltage generator. The display panel includes a plurality of pixels. Each of the pixels receives a driving voltage through a first voltage line. The driving controller receives an input image signal including first to third color signals and outputs a voltage control signal for controlling a voltage level of the driving voltage based on the first to third color signals. The voltage generator provides the driving voltage to the first voltage line and determines the voltage level of the driving voltage based on the voltage control signal. The driving controller determines first to third gate-source voltages respectively corresponding to the first to third color signals and outputs the voltage control signal based on the first to third gate-source voltages.

Abstract: A display device includes: a display panel including a pixel; a scan driver configured to provide a first scan signal and a second scan signal to the pixel; and a controller configured to provide a first scan control signal for generating the first scan signal and a second scan control signal for generating the second scan signal to the scan driver, wherein the second scan signal includes an active pulse in an active period having a constant time length and at least one dummy pulse in a vertical blank period having a variable time length, and wherein an interval between the active pulse and a first dummy pulse of the second scan signal is different from an interval between the first dummy pulse and a second dummy pulse of the second scan signal.

Abstract: A display apparatus includes a display panel, a driving controller and a data driver. The driving controller divides input image data into a plurality of partial image data corresponding to a plurality of display areas of the display panel, calculates local loads corresponding to the plurality of partial image data, determines a scale factor based on the local loads, and applies the scale factor to the input image data to generate a data signal. The data driver converts the data signal to a data voltage and outputs the data voltage to the display panel. The scale factor for a center display area corresponding to a center of the display panel among the plurality of display areas is determined differently from the scale factor for an edge display area corresponding to an edge of the display panel among the plurality of display areas.

Abstract: A display apparatus includes a display panel, a driving controller and a data driver. The driving controller divides input image data into a plurality of partial image data corresponding to a plurality of display areas of the display panel, calculates local loads corresponding to the plurality of partial image data, determines a scale factor based on the local loads, and applies the scale factor to the input image data to generate a data signal. The data driver converts the data signal to a data voltage and outputs the data voltage to the display panel. The scale factor for a center display area corresponding to a center of the display panel among the plurality of display areas is determined differently from the scale factor for an edge display area corresponding to an edge of the display panel among the plurality of display areas.

Abstract: A display device includes a display unit which includes a plurality of pixels, a degradation controller which includes a voltage compensator configured to calculate a driving voltage increase amount based on a degradation amount of a maximum degradation pixel among the pixels and a global current controller configured to calculate calculates a first scale factor for compensating a power increase amount according to the driving voltage increase amount, a driving voltage provider which is configured to increase a driving voltage provided to the pixels based on the driving voltage increase amount, a data compensator which is configured to generate output image data by scaling the first scale factor to grayscale values of input image data, and a data driver which is configured to provide data voltages to the pixels based on the output image data.

Abstract: A display device includes a display panel including a plurality of pixels, a current sensor that senses a sensing current that flows through the pixels, and a data compensator. The data compensator calculates a target current from an image frame of input image data using a current deviation for each position of the image frame and a current contribution ratio for each color of the image frame, and that generates a scale factor by comparing the target current and the sensing current. The display device further includes a timing controller that generates output image data by scaling grayscale values of the input image data using the scale factor; and a data driver that provides a data signal corresponding to the output image data to the pixels.

Abstract: A display apparatus includes: a display panel; a driving controller, which receives input image data including a plurality of normal image frames and a plurality of black image frames, receives a flag indicating a type of each of frames included in the input image data, generates intermediate image data by adjusting a grayscale of the input image data based on the input image data and the flag, and generates a data signal based on the intermediate image data where the type includes a normal image frame and a black image frame; and a data driver, which generates a data voltage based on the data signal and outputs the data voltage to the display panel.

Abstract: A display device includes a display panel, a driving controller, and a voltage generator. The display panel includes a plurality of pixels. Each of the pixels receives a driving voltage through a first voltage line. The driving controller receives an input image signal including first to third color signals and outputs a voltage control signal for controlling a voltage level of the driving voltage based on the first to third color signals. The voltage generator provides the driving voltage to the first voltage line and determines the voltage level of the driving voltage based on the voltage control signal. The driving controller determines first to third gate-source voltages respectively corresponding to the first to third color signals and outputs the voltage control signal based on the first to third gate-source voltages.

Abstract: A display driver includes a nonvolatile memory, an encoder, a decoder, and a compensator. The nonvolatile memory is configured to store accumulated stress data and compensation data corresponding to the accumulated stress data. The encoder is configured to encode the compensation data received from the nonvolatile memory to generate encoded compensation data. The decoder is configured to decode the encoded compensation data to generate decoded compensation data. The compensator is configured to process input image data based on the decoded compensation data and generate accumulated stress data.

Abstract: A display device includes a display panel including a plurality of pixels, a current sensor that senses a sensing current that flows through the pixels, and a data compensator. The data compensator calculates a target current from an image frame of input image data using a current deviation for each position of the image frame and a current contribution ratio for each color of the image frame, and that generates a scale factor by comparing the target current and the sensing current. The display device further includes a timing controller that generates output image data by scaling grayscale values of the input image data using the scale factor; and a data driver that provides a data signal corresponding to the output image data to the pixels.

Abstract: A display device includes a display panel, a driving controller, and a voltage generator. The display panel includes a plurality of pixels. Each of the pixels receives a driving voltage through a first voltage line. The driving controller receives an input image signal including first to third color signals and outputs a voltage control signal for controlling a voltage level of the driving voltage based on the first to third color signals. The voltage generator provides the driving voltage to the first voltage line and determines the voltage level of the driving voltage based on the voltage control signal. The driving controller determines first to third gate-source voltages respectively corresponding to the first to third color signals and outputs the voltage control signal based on the first to third gate-source voltages.

Abstract: A method of compensating for luminance of a display device includes determining position compensation values of each of panel blocks for measurement grayscale values based on a difference between luminance of a reference panel block and luminance of the each of the panel blocks for the measurement grayscale values, generating a first gamma curve for a first driving frequency and the position compensation values of the each of the panel blocks for the measurement grayscale values, generating a second gamma curve for a second driving frequency and the luminance of the panel blocks for the measurement grayscale values at the first driving frequency, and compensating for input image data based on the first gamma curve and the second gamma curve.

Abstract: A display device includes a display panel and a display panel driver. The display panel includes pixels. The display panel driver determines an average image load of input image data, determines an operation mode based on a grayscale value of the input image data and the average image load as a first operation mode or a second operation mode, applies a first scale factor to the input image data in the first operation mode, applies a second scale factor different from the first scale factor to the input image data in the second operation mode, and drives the display panel.

Abstract: A display driver includes a nonvolatile memory, an encoder, a decoder, and a compensator. The nonvolatile memory is configured to store accumulated stress data and compensation data corresponding to the accumulated stress data. The encoder is configured to encode the compensation data received from the nonvolatile memory to generate encoded compensation data. The decoder is configured to decode the encoded compensation data to generate decoded compensation data. The compensator is configured to process input image data based on the decoded compensation data and generate accumulated stress data.

Abstract: A display device including: a display panel including first through N-th pixel rows; and a panel driver configured to sequentially receive first through N-th line data for the first through the N-th pixel rows in each frame period, and to drive the display panel based on the first through the N-th line data, the panel driver including: a current control circuit configured to determine a current control value for a (K+1)-th pixel row based on the first through K-th line data for the first through K-th pixel rows received in a current frame period and (K+1)-th through the N-th line data for the (K+1)-th through the N-th pixel rows received in a previous frame period; and a data correction circuit configured to correct the (K+1)-th line data for the (K+1)-th pixel row based on the current control value in the current frame period.

Abstract: A display device includes a display panel and a display panel driver. The display panel includes pixels. The display panel driver determines an average image load of input image data, determines an operation mode based on a grayscale value of the input image data and the average image load as a first operation mode or a second operation mode, applies a first scale factor to the input image data in the first operation mode, applies a second scale factor different from the first scale factor to the input image data in the second operation mode, and drives the display panel.