US 12,223,874 B2
Method and apparatus for adjusting brightness of display
Yoongu Kim, Huizhou (CN); Yizhuo Zhao, Huizhou (CN); and Yuhua Chang, Huizhou (CN)
Assigned to Huizhou China Star Optoelectronics Display Co., Ltd., Huizhou (CN); and TCL China Star Optoelectronics Technology Co., Ltd., Shenzhen (CN)
Appl. No. 17/618,554
Filed by Huizhou China Star Optoelectronics Display Co., Ltd., Huizhou (CN); and TCL China Star Optoelectronics Technology Co., Ltd., Shenzhen (CN)
PCT Filed Nov. 23, 2021, PCT No. PCT/CN2021/132397
§ 371(c)(1), (2) Date Dec. 13, 2021,
PCT Pub. No. WO2023/077567, PCT Pub. Date May 11, 2023.
Claims priority of application No. 202111303326.8 (CN), filed on Nov. 5, 2021.
Prior Publication US 2024/0296772 A1, Sep. 5, 2024
Int. Cl. G09G 3/20 (2006.01)
CPC G09G 3/2007 (2013.01) [G09G 2320/0247 (2013.01); G09G 2320/0271 (2013.01); G09G 2320/0626 (2013.01); G09G 2320/0693 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for adjusting a brightness of a display, comprising:
dividing pixel points of a display screen into a preset calibration area and a non-preset calibration area, wherein the non-preset calibration area comprises a first type of non-preset calibration area and a second type of non-preset calibration area, the first type of non-preset calibration area is located between two preset calibration areas, and end points of the second type of non-preset calibration area are end points of four different preset calibration areas respectively;
acquiring a gray scale number for displaying and a working frequency for displaying of a display screen;
determining a first gray scale compensation value of the preset calibration area of the display screen according to the gray scale number for displaying and the working frequency using a preset gray scale compensation mapping table, wherein gray scale numbers and gray scale compensation values of the preset calibration area at working frequency nodes in the preset gray scale compensation mapping table are in a one-to-one correspondence;
determining a second gray scale compensation value of the first type of non-preset calibration area of the display screen according to first gray scale compensation values of the two preset calibration areas adjacent to the first type of non-preset calibration area;
determining a second gray scale compensation value of the second type of non-preset calibration area of the display screen according to first gray scale compensation values of the four different preset calibration areas sharing end points with the second type of non-preset calibration area;
controlling, according to the first gray scale compensation value of the preset calibration area, the preset calibration area to reach a preset brightness for displaying;
controlling, according to the second gray scale compensation value of the first type of non-preset calibration area, the first type of non-preset calibration area to reach the preset brightness for displaying; and
controlling, according to the second gray scale compensation value of the second type of non-preset calibration area, the second type of non-preset calibration area to reach the preset brightness for displaying;
wherein each preset calibration area is set as one pixel unit, and pixel points in one preset calibration area correspond to one first gray scale compensation value.