Abstract: Provided are a display driving chip, a display apparatus and a display driving method. The display driving chip includes a gaze tracker, an image receiver, an image parser and an image driver, wherein the gaze tracker is configured to achieve real-time locating for the pupil center of human eyes and real-time calculation for gaze point coordinates, and output the gaze point coordinates of human eyes to the image parser; the image receiver is configured to receive image data to be played through a first image interface and input the image data to be played to the image parser; the image parser is configured to compress or decompress the image data to be played according to the gaze coordinates of human eyes and output the image data to the image driver.

Abstract: A gaze point calculation apparatus includes: a first cache register, a multiplexer, an arithmetic unit assembly, and a state machine. The first cache register is configured to receive and store first coordinates and a plurality of calibration parameters required when second required are obtained through calculation according to the first coordinates. The state machine is configured to control the multiplexer to select each time at least one value from the first cache register and transmit same to the arithmetic unit assembly. The arithmetic unit assembly is configured to perform a preset operation on the at least one value received each time until the second coordinates are obtained, and output the second coordinates under control of the state machine.

Abstract: An optical system includes at least one first display module, at least one second display module, and a first optical element. The first optical element includes a first light incident surface, a second light incident surface, and a viewing surface. The first light incident surface is configured to transmit imaging light emitted from the at least one first display module into the first optical element and refract it onto the second light incident surface. The second light incident surface is configured to transmit imaging light emitted from the at least one second display module into the first optical element and refract it onto the viewing surface, and reflect the imaging light transmitted into the first optical element through the first light incident surface onto the viewing surface. The viewing surface is configured to transmit the imaging light emitted from all display modules to a human eye.

Abstract: A gaze-point determining method, a contrast adjusting method and a contrast adjusting apparatus for a virtual reality device, a virtual reality device and a storage medium. The contrast adjusting method includes: determining a coordinate of a gaze point in a display region viewed by a user; determining a gaze region of the user based on the coordinate of the gaze point; and adjusting brightness of the gaze region.

Abstract: Provided are a display driving chip, a display apparatus and a display driving method. The display driving chip includes a gaze tracker, an image receiver, an image parser and an image driver, wherein the gaze tracker is configured to achieve real-time locating for the pupil center of human eyes and real-time calculation for gaze point coordinates, and output the gaze point coordinates of human eyes to the image parser; the image receiver is configured to receive image data to be played through a first image interface and input the image data to be played to the image parser; the image parser is configured to compress or decompress the image data to be played according to the gaze coordinates of human eyes and output the image data to the image driver.

Abstract: The present application discloses a pixel circuit and a driving method thereof, and a display device. The circuit includes: a first initialization sub-circuit, a data writing circuit, a light emitting control circuit, a capacitor circuit, a drive transistor, a compensation circuit, a light emitting element, and a holding circuit; the first initialization sub-circuit is connected to a second terminal of the capacitor circuit and a gate of the drive transistor; the data writing circuit and the holding circuit are connected to a first terminal of the capacitor circuit; the light emitting control circuit is connected to a first electrode of the light emitting element and a second electrode of the drive transistor; a first electrode of the drive transistor is connected to the first power supply; a second electrode of the light emitting element is connected to a second power supply.

Abstract: Disclosed are a pixel circuit and a driving method thereof, an array substrate and a display device. The pixel circuit includes: a driving circuit, including a control terminal, a first terminal and a second terminal, and configured to control a driving current flowing through the first terminal and the second terminal for driving a light-emitting element to emit light; and input circuit, configured to transmit a reset voltage and a data signal in response to a first scan signal; a reset circuit, configured to apply the reset voltage to the control terminal in response to a second scan signal; a compensation circuit, configured to store the data signal and to electrically connect the control terminal with the second terminal in response to a third scan signal; and a data writing circuit, configured to apply the data signal to the compensation circuit in response to the third scan signal.

Abstract: The present application discloses a method for reducing brightness of images at least partially. The method includes determining a grayscale mapping table corresponding to a previous frame of image and adjusting grayscale value of each pixel of a current frame of image based on the grayscale mapping table to enhance a contrast ratio to determine an after-adjust grayscale value of each pixel of the current frame of image. Furthermore, the method includes determining one or more coefficients of grayscale reduction based on the after-adjust grayscale value of each pixel of the current frame of image. Moreover, the method includes reducing grayscale value of each pixel of a next frame of image based on the one or more coefficients of grayscale reduction and after-adjust grayscale values of corresponding pixels of the next frame of image.

Abstract: The present disclosure relates to a matrix transposition device and method, and a display device. The matrix transposition device includes a first counting unit, an input module, second counting units, and a first data selection unit. The first counting unit numbers a matrix element and outputs a first signal. The input module is coupled to the first counting unit, and is input with the matrix element after receiving the first signal; each. Each column of matrix elements corresponds to one of the second counting units, each of the second counting units outputs a set of second signals, and each set of the second signals includes number information of the matrix elements in a column corresponding to the second counting unit. The first data selection unit receives the second signals in an order of columns of a matrix, and orderly outputs column elements of the matrix as row elements of a transposed matrix.

Abstract: The present disclosure provides a method and apparatus for driving a display panel, and a display device. The method includes: upon driving an ith row of sub-pixels, scanning a gate line connected to a jth row of sub-pixels, and determining a reference grayscale of each of the jth row of sub-pixels in each candidate connection mode, wherein a plurality of data lines have a plurality of candidate connection modes; determining a target connection mode that minimizes a grayscale variation degree of the jth row of sub-pixels from the plurality of candidate connection modes; connecting the plurality of data lines according to the target connection mode; and disconnecting the plurality of data lines before driving the jth row of sub-pixels through the plurality of data lines.

Abstract: A gaze-point determining method, a contrast adjusting method and a contrast adjusting apparatus for a virtual reality device, a virtual reality device and a storage medium. The contrast adjusting method includes: determining a coordinate of a gaze point in a display region viewed by a user; determining a gaze region of the user based on the coordinate of the gaze point; and adjusting brightness of the gaze region.

Abstract: Disclosed are a pixel circuit and a driving method thereof, an array substrate and a display device. The pixel circuit includes: a driving circuit, including a control terminal, a first terminal and a second terminal, and configured to control a driving current flowing through the first terminal and the second terminal for driving a light-emitting element to emit light; an input circuit, configured to transmit a reset voltage and a data signal in response to a first scan signal; a reset circuit, configured to apply the reset voltage to the control terminal in response to a second scan signal; a compensation circuit, configured to store the data signal and to electrically connect the control terminal with the second terminal in response to a third scan signal; and a data writing circuit, configured to apply the data signal to the compensation circuit in response to the third scan signal.

Abstract: The preset disclosure provides a display method, a display device and a display. The display method includes: transmitting data to be displayed to a processing unit in an RGB format after acquiring the data to be displayed; performing contrast adjustment and brightness adjustment on the data to be displayed in the RGB format by the processing unit, and transmitting the processed data to be displayed to a conversion unit; converting the processed data to be displayed into data in an MIPI format by the conversion unit, and displaying the data to be displayed in the MIPI format.

Abstract: The present application discloses a method for reducing brightness of images at least partially. The method includes determining a grayscale mapping table corresponding to a previous frame of image and adjusting grayscale value of each pixel of a current frame of image based on the grayscale mapping table to enhance a contrast ratio to determine an after-adjust grayscale value of each pixel of the current frame of image. Furthermore, the method includes determining one or more coefficients of grayscale reduction based on the after-adjust grayscale value of each pixel of the current frame of image. Moreover, the method includes reducing grayscale value of each pixel of a next frame of image based on the one or more coefficients of grayscale reduction and after-adjust grayscale values of corresponding pixels of the next frame of image.

Abstract: The embodiments of the disclosure provide a pupil center positioning apparatus and method, and a virtual reality device. The pupil center positioning apparatus may comprise: a matrix operation circuit configured to obtain a set of linear normal equations according to received N boundary point coordinates of a pupil area, N being a positive integer greater than 5; a parameter operation circuit configured to obtain parameters of an elliptic equation employing the Cramer's Rule according to the set of linear normal equations; and a coordinate operation circuit configured to obtain the center coordinate of the pupil area according to the parameters of the elliptic equation.

Abstract: The present disclosure provides a method and apparatus for driving a display panel, and a display device. The method includes: upon driving an ith row of sub-pixels, scanning a gate line connected to a jth row of sub-pixels, and determining a reference grayscale of each of the jth row of sub-pixels in each candidate connection mode, wherein a plurality of data lines have a plurality of candidate connection modes; determining a target connection mode that minimizes a grayscale variation degree of the jth row of sub-pixels from the plurality of candidate connection modes; connecting the plurality of data lines according to the target connection mode; and disconnecting the plurality of data lines before driving the jth row of sub-pixels through the plurality of data lines.

Abstract: The present disclosure relates to a matrix transposition device and method, and a display device. The matrix transposition device includes a first counting unit, an input module, second counting units, and a first data selection unit. The first counting unit numbers a matrix element and outputs a first signal. The input module is coupled to the first counting unit, and is input with the matrix element after receiving the first signal. Each column of matrix elements corresponds to one of the second counting units, each of the second counting units outputs a set of second signals, and each set of the second signals includes number information of the matrix elements in a column corresponding to the second counting unit. The first data selection unit receives the second signals in an order of columns of a matrix, and orderly outputs column elements of the matrix as row elements of a transposed matrix.

Abstract: The embodiments of the disclosure provide a pupil center positioning apparatus and method, and a virtual reality device. The pupil center positioning apparatus may comprise: a matrix operation circuit configured to obtain a set of linear normal equations according to received N boundary point coordinates of a pupil area, N being a positive integer greater than 5; a parameter operation circuit configured to obtain parameters of an elliptic equation employing the Cramer's Rule according to the set of linear normal equations; and a coordinate operation circuit configured to obtain the center coordinate of the pupil area according to the parameters of the elliptic equation.

Abstract: The preset disclosure provides a display method, a display device and a display. The display method includes: transmitting data to be displayed to a processing unit in an RGB format after acquiring the data to be displayed; performing contrast adjustment and brightness adjustment on the data to be displayed in the RGB format by the processing unit, and transmitting the processed data to be displayed to a conversion unit; converting the processed data to be displayed into data in an MIPI format by the conversion unit, and displaying the data to be displayed in the MIPI format.

Abstract: A two-stage operational amplifier is provided to comprise a bias voltage generator, a first stage operational amplifier and a second stage operational amplifier, wherein the first stage operational amplifier comprises a folded cascode amplifier circuit and a cross coupling load, the cross coupling load is coupled to a load differential pair in the folded cascode amplifier circuit, the cross coupling load comprises two transistors, the two transistors in the cross coupling load and two transistors in the load differential pair constitute two current mirror structures, which are cross coupled. In the solution, the cross coupling load is added to the load differential pair in the folded cascode amplifier circuit, to increase gain of the two-stage operational amplifier by using positive feedback and negative conductance gain enhancement technology; while parameters of MOSFETs in the folded cascode amplifier circuit are properly set to reduce noise of the two-stage operational amplifier.