US 12,067,935 B2
Display compensating method, display compensating device, and display device
Yifan Hou, Beijing (CN); Tiankuo Shi, Beijing (CN); Zhihua Ji, Beijing (CN); Xiaomang Zhang, Beijing (CN); Xin Duan, Beijing (CN); Wei Sun, Beijing (CN); Tao Yang, Beijing (CN); Chenxi Zhao, Beijing (CN); Xiangjun Peng, Beijing (CN); Shuo Zhang, Beijing (CN); Minglei Chu, Beijing (CN); Yan Sun, Beijing (CN); and Yanhui Xi, Beijing (CN)
Assigned to Beijing BOE OptoelectronicsTechnology Co., Ltd., Beijing (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
Appl. No. 17/762,695
Filed by Beijing BOE Optoelectronics Technology Co., Ltd., Beijing (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed May 7, 2021, PCT No. PCT/CN2021/092098
§ 371(c)(1), (2) Date Aug. 4, 2022,
PCT Pub. No. WO2022/160496, PCT Pub. Date Aug. 4, 2022.
Claims priority of application No. 202110117897.6 (CN), filed on Jan. 28, 2021.
Prior Publication US 2024/0054950 A1, Feb. 15, 2024
Int. Cl. G09G 3/3258 (2016.01); G09G 3/3208 (2016.01); H01L 27/32 (2006.01)
CPC G09G 3/3208 (2013.01) [G09G 2320/0233 (2013.01); G09G 2320/0242 (2013.01); G09G 2320/041 (2013.01); G09G 2360/16 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A display compensating method, applied to a display device, the display compensating method comprising:
converting a received grayscale signal into a brightness signal;
performing an optical compensation on a display brightness of the display device based on the brightness signal;
converting a corresponding brightness signal on which the optical compensation is performed into a voltage signal; and
compensating for a threshold voltage corresponding to each sub-pixel in the display device based on the voltage signal; and compensating for, according to an operating temperature change in the display device, operating parameters of the display device for the display device operated at different operating temperatures;
wherein the step of compensating for the operating parameters of the display device for the display device operated at different operating temperatures comprises:
determining a first correspondence between cathode potentials and operating temperatures for the display device within a standard operating temperature; determining a high-temperature cathode potential for the display device at a high operating temperature, the high operating temperature being greater than the highest temperature of the standard operating temperature range;
detecting the operating temperature of the display device for multiple times;
in a case that an operating temperature of a current detection is within the standard operating temperature range:
when the operating temperature of the current detection is equal to an operating temperature of a most recent detection, keeping the cathode potential of the display device unchanged;
when the operating temperature of the current detection is not equal to the operating temperature of the most recent detection, determining, according to the first correspondence, a current cathode potential corresponding to the operating temperature of the current detection and a last cathode potential corresponding to the operating temperature of the most recent detection;
determining a potential difference value between the current cathode potential and the last cathode potential, and in a case where an absolute value of the potential difference value is less than a preset step value, determining that the cathode potential of the display device is the current cathode potential; in a case where the potential difference value is greater than or equal to the step value, and when the operating temperature of the current detection is greater than the operating temperature of the most recent detection, determining that the cathode potential of the display device at a current frame is VSS(Fn−1)+stepV; in a case where the potential difference value is greater than or equal to the step value, and when the operating temperature of the current detection is less than the operating temperature of the most recent detection, determining that the cathode potential of the display device at the current frame is VSS(Fn−1)−stepV; wherein the VSS(Fn−1) is a corresponding cathode potential of the display device at a previous frame adjacent to the current frame, and stepV is the step value;
in a case where the operating temperature of the current detection is regarded as the high operating temperature, controlling the display device to display a black image, and in the process of displaying the black image, controlling the cathode potential of the display device to change to the high-temperature cathode potential; and
in a case that the operating temperature of the current detection is lower than the lowest temperature of the standard operating temperature range, controlling the cathode potential of the display device to change to a cathode potential corresponding to the lowest operating temperature of the standard operating temperature range.