- 专利标题: Fingerprint detection module, electronic device, detection method and apparatus, and storage medium
-
申请号: US17065881申请日: 2020-10-08
-
公开(公告)号: US11417137B2公开(公告)日: 2022-08-16
- 发明人: Chihjen Cheng
- 申请人: BEIJING XIAOMI MOBILE SOFTWARE CO., LTD.
- 申请人地址: CN Beijing
- 专利权人: BEIJING XIAOMI MOBILE SOFTWARE CO., LTD.
- 当前专利权人: BEIJING XIAOMI MOBILE SOFTWARE CO., LTD.
- 当前专利权人地址: CN Beijing
- 代理机构: Oblon, McClelland, Maier & Neustadt, L.L.P.
- 优先权: CN202010467924.8 20200528
- 主分类号: G06V40/13
- IPC分类号: G06V40/13
摘要:
The fingerprint detection module having at least one fingerprint identification component and an acquisition component. The fingerprint identification component includes a reset unit, a photosensitive unit, and a follower unit. The reset unit switches a voltage at an output end of the photosensitive unit to an initial voltage according to a reset signal. The photosensitive unit receives reflected light of a to-be-detected fingerprint and accumulates charges, outputs a first electrical signal according to a received pulse control signal at a first level, and outputs a second electrical signal according to a next received pulse control signal at the first level. The follower unit receives the first electrical signal and forms a first voltage, and receives the second electrical signal and forms a second voltage. Further, the acquisition component receives the first voltage and the second voltage, and acquires the fingerprint according to a difference between the second and first voltage.
公开/授权文献
信息查询