US 12,462,726 B2
Display method for controlling display brightness during fingerprint recognition, and electronic device therefor
Jialiang Sun, Shenzhen (CN); Kai Xu, Shenzhen (CN); Ruizhe Li, Shanghai (CN); and Menghu Shen, Shanghai (CN)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Appl. No. 18/575,646
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
PCT Filed Jun. 10, 2022, PCT No. PCT/CN2022/098236
§ 371(c)(1), (2) Date Dec. 29, 2023,
PCT Pub. No. WO2023/273844, PCT Pub. Date Jan. 5, 2023.
Claims priority of application No. 202110745146.9 (CN), filed on Jun. 30, 2021.
Prior Publication US 2024/0339068 A1, Oct. 10, 2024
Int. Cl. G09G 3/20 (2006.01); G06V 40/13 (2022.01); G06V 40/60 (2022.01)
CPC G09G 3/2092 (2013.01) [G06V 40/1318 (2022.01); G06V 40/67 (2022.01); G09G 3/2007 (2013.01); G09G 2320/0247 (2013.01); G09G 2320/0686 (2013.01); G09G 2354/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An electronic device, comprising:
an application processor; and
a display screen, comprising a display driver chip and a display panel;
wherein the display panel is configured to display a first image;
wherein the application processor is configured to send first indication information and a first parameter to the display driver chip, wherein the first parameter is determined by the application processor based on a grayscale of a mask area in the first image, and the mask area is an area in the first image other than a fingerprint recognition area;
wherein the display driver chip is configured to control, based on the first indication information received from the application processor, a brightness of the fingerprint recognition area in the first image to be a first brightness, and control a brightness of the mask area in the first image to be a second brightness, wherein the brightness of the mask area is controlled based on the first parameter;
wherein the display panel is configured to display an updated first image, wherein the brightness of the fingerprint recognition area in the updated first image is the first brightness, and the brightness of the mask area is the second brightness; and
wherein when the display panel displays the updated first image, a light adjustment mode of the display screen is direct current adjustment, and the first parameter is an alpha value determined based on the grayscale of the mask area and a light adjustment mode that is of the display screen and that is used when the display panel displays the first image; and
wherein:
when the light adjustment mode that is of the display screen and that is used when the display panel displays the first image is pulse-width modulation (PWM), the first parameter is less than 1; or
when the light adjustment mode that is of the display screen and that is used when the display panel displays the first image is direct current adjustment, the first parameter is equal to 1.