US 11,810,390 B2
Method for fingerprint detection, fingerprint sensor and electronic device
Xiaogang Qing, Guangdong (CN)
Assigned to SHENZHEN GOODIX TECHNOLOGY CO., LTD., Guangdong (CN)
Filed by SHENZHEN GOODIX TECHNOLOGY CO., LTD., Guangdong (CN)
Filed on Jun. 21, 2022, as Appl. No. 17/844,908.
Application 17/844,908 is a continuation of application No. PCT/CN2020/137782, filed on Dec. 18, 2020.
Prior Publication US 2022/0319226 A1, Oct. 6, 2022
Int. Cl. G06V 40/13 (2022.01); G06V 10/141 (2022.01); G06V 10/147 (2022.01)
CPC G06V 40/1318 (2022.01) [G06V 10/141 (2022.01); G06V 10/147 (2022.01)] 17 Claims
OG exemplary drawing
 
1. A method for fingerprint detection, comprising:
receiving a synchronization signal of a display screen, the synchronization signal being configured to trigger a pixel array of a fingerprint sensor to expose, wherein a period of the synchronization signal is synchronized with a dimming period of the display screen, and the dimming period comprises a bright period and a dark period;
exposing each row of pixels in the pixel array in sequence based on triggering of the synchronization signal, so that a position of a pixel whose exposure time corresponding to the dark period in the pixel array is constant, wherein data of each row of the pixels after exposure is configured to obtain a fingerprint image.