Nath, Goldberg & Meyer
Fingerprint detection device and fingerprint detection method
The present disclosure provides a fingerprint detection device and method. The fingerprint detection device includes a detection substrate and a signal converter. The detection substrate includes pixels arranged in rows and columns. Each pixel includes a sensing circuit configured to receive an optical signal and output a sensing electrical signal according to the received optical signal. The signal converter includes A/D converters each coupled to one column of sensing circuits. The fingerprint detection device further includes a control circuit coupled to the sensing circuits and the A/D converters and configured to obtain common mode component of sensing electrical signals output by sensing circuits of at least part of the pixels and provide information about the common mode component to the A/D converters. The A/D converter is configured to perform analog-to-digital conversion on difference between the sensing electrical signal from corresponding sensing circuit and the common mode signal.
BOE TECHNOLOGY GROUP CO., LTD.
G H G
G06V H04N G06K
inventional inventional inventional
Likai Yangbing Xiaoliang Haisheng Wei Xue Bo Pengpeng Yingming Jiabin Ping
Deng Li Ding Wang Liu Dong Chen Wang Liu Wang Zhang