A display apparatus includes a display panel, an afterimage compensator and a data driver. The display panel displays an image. The afterimage compensator writes first stress data of input image data corresponding to a first area to a first memory area in a first block size and second stress data of the input image data corresponding to a second area to a second memory area in a second block size different from the first block size and compensates a grayscale value of the input image data based on the first stress data and the second stress data. The data driver generates a data voltage based on a compensated grayscale value and outputs the data voltage to the display panel.

An electronic device includes a communication interface and a processor, wherein the processor receives a first image predistorted and rendered at a first time, from an external device through the communication interface, calculates a pixel shift for each pixel of the received first image at a second time that is different from the first time, generates a second image by reprojecting the first image based on the calculated pixel shift, and transmits the generated second image to the external device through the communication interface.

The present disclosure relates to systems and methods to control brightness and color output in foldable displays. A foldable electronic display may, when folded, includes a first part in a first plane and a second part in a second plane different from the first plane. A brightness or color setting of the first part may be controlled independently of a brightness or color setting of the second part.

An electronic device may display image content via a tile-based display by controlling light emission from display pixels of the tile-based display. Based on image data associated with the image content, a processing circuitry of the tile-based display may receive a potential tile boundary. The processing circuitry may resample the image data based on geometry of the tile boundary and positions of the display pixels on the tile-based panel. After resampling the image data, the processing circuitry may adjust gain of the tile boundary display pixels according to a gain mask to compensate for the tile boundary.

Disclosed are a grayscale compensation method and apparatus, and a display device. The grayscale compensation method includes obtaining a basic grayscale of each compensation device; obtaining an equivalent lighting duration of the each compensation device, where the equivalent lighting duration is a duration of lighting the compensation device with a preset grayscale obtained by converting an actual lighting duration of the compensation device; if the equivalent duration reaches a preset time point, obtaining a grayscale compensation parameter corresponding to the compensation device by searching a table according to the preset time point and the basic grayscale, and performing grayscale compensation on a sub-pixel in the compensation device according to the grayscale compensation parameter and the basic grayscale.

A display apparatus includes a display panel, a scan driver, a data driver and a timing controller. The display panel includes a plurality of pixels that are connected to a plurality of data lines and a plurality of scan lines having different lengths. The scan driver apply a plurality of scan signals to the plurality of scan lines. The data driver apply a plurality of data voltages to the plurality of data lines, and receive a plurality of sensing data that represent operating characteristics of all of the plurality of pixels from a plurality of sensing lines. The timing controller controls operations of the scan driver and the data driver, generates output image data considering the operating characteristics of all of the plurality of pixels and supply the output image data to the data drive.

In a display device having an external compensation function, a decrease in compensation accuracy caused by coupling noise generated in a data signal line is prevented. A source driver includes an integration circuit that measures a current corresponding to the characteristic of a drive transistor. An emission driver applies a light-emission control signal to each light-emission control line on the basis of a plurality of light-emission control clock signals (ECK1 to ECK4) outputted from a display control circuit. In a current measurement period, the flow of a current corresponding to the characteristic of the drive transistor into the integration circuit is stopped at an edge timing, which is a timing at which the level of at least one of the plurality of light-emission control clock signals (ECK1 to ECK4) changes.

A display device includes a display panel including a pixel, a driving controller that receives an image signal and outputs an image data signal in which the image signal is compensated, and a data driving circuit that provides the pixel with a data signal corresponding to the image data signal. The driving controller includes a memory, a hysteresis calculator that calculates a current hysteresis state value of a current frame based on the image signal and a previous hysteresis state value of a previous frame, which is stored in the memory, and stores the current hysteresis state value in the memory, and a compensator that calculates a compensation value based on the image signal and the previous hysteresis state value stored in the memory and compensates for the image signal depending on the compensation value to output the image data signal.

A display device includes: a plurality of pixels coupled to data lines and sensing lines; a data driver configured to supply one of an image data signal and a sensing data signal to the data lines; a voltage supply configured to supply an initialization voltage to the pixels through the sensing lines; and a sensing circuit configured to receive a sensing value from at least one of the pixels through the sensing lines, and compare the sensing value with a sensing reference value to generate a sensing voltage control signal to control at least one of the sensing data signal or the initialization voltage.

A handheld imaging device has a data receiver that is configured to receive reference encoded image data. The data includes reference code values, which are encoded by an external coding system. The reference code values represent reference gray levels, which are being selected using a reference grayscale display function that is based on perceptual non-linearity of human vision adapted at different light levels to spatial frequencies. The imaging device also has a data converter that is configured to access a code mapping between the reference code values and device-specific code values of the imaging device. The device-specific code values are configured to produce gray levels that are specific to the imaging device. Based on the code mapping, the data converter is configured to transcode the reference encoded image data into device-specific image data, which is encoded with the device-specific code values.