Patent ID: 11862077
Assignee: BOE TECHNOLOGY GROUP CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 15:
16. A timing controller, comprising:
a data analysis circuit configured to divide a total gray scale range of a gamma voltage curve of a display apparatus to obtain a plurality of gray scale ranges, and obtain data of gray scales of at least one frame of image to be displayed by the display apparatus;
a ratio calculation circuit coupled to the data analysis circuit and configured to calculate a ratio of data of gray scales in each gray scale range to the data of gray scales of the at least one frame of image to be displayed; and
a gamma voltage calculation circuit coupled to the ratio calculation circuit, wherein the gamma voltage calculation circuit is configured to: adjust a division value of a gamma voltage range corresponding to each gray scale range of the gamma voltage curve according to the calculated ratio, so that a division value of a gamma voltage range corresponding to a gray scale range with a maximum ratio is less than a division value of a gamma voltage range corresponding to any remaining gray scale range; and output gamma voltages corresponding to the data of gray scales of the at least one frame of image to be displayed according to the adjusted gamma voltage curve;
wherein that the gamma voltage calculation circuit is configured to adjust the division value of the gamma voltage range corresponding to each gray scale range of the gamma voltage curve according to the calculated ratio so that the division value of the gamma voltage range corresponding to the gray scale range with the maximum ratio is less than the division value of the gamma voltage range corresponding to any remaining gray scale range, includes:
determining the gray scale range with the maximum ratio from the calculated ratios;
calculating reference gamma voltages of two end points corresponding to gray scale coordinates of two end points in the gray scale range with the maximum ratio; and
calculating the division value of the gamma voltage range corresponding to the gray scale range with the maximum ratio according to a difference between the reference gamma voltages of two end points corresponding to the gray scale range with the maximum ratio and a difference between the gray scale coordinates of two end points in the gray scale range with the maximum ratio.