Invention Grant
- Patent Title: Fingerprint recognition driving circuit, fingerprint recognition module, touch screen, display device and fingerprint recognition driving method
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Application No.: US17255922Application Date: 2020-05-06
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Publication No.: US11157712B2Publication Date: 2021-10-26
- Inventor: Shengji Yang , Xue Dong , Xiaochuan Chen , Hui Wang , Pengcheng Lu , Shengnan Li , Kuanta Huang
- Applicant: BOE TECHNOLOGY GROUP CO., LTD.
- Applicant Address: CN Beijing
- Assignee: BOE TECHNOLOGY GROUP CO., LTD.
- Current Assignee: BOE TECHNOLOGY GROUP CO., LTD.
- Current Assignee Address: CN Beijing
- Agency: Fay Sharpe LLP
- Priority: CN201910407471.7 20190516
- International Application: PCT/CN2020/088819 WO 20200506
- International Announcement: WO2020/228573 WO 20201119
- Main IPC: G06K9/00
- IPC: G06K9/00 ; G06F3/041 ; G06F3/044

Abstract:
Fingerprint recognition driving circuit and method, fingerprint recognition module and touch screen are provided. The circuit includes: a first charge storing sub-circuit, a data acquiring sub-circuit configured to write output voltage of an ultrasonic sensor into a first end of the first charge storing sub-circuit, a driving sub-circuit including a driving transistor, a second charge storing sub-circuit, a circuit compensating sub-circuit configured to charge the second charge storing sub-circuit through the first charge storing sub-circuit and the driving transistor ill potential at a first end of the second charge storing sub-circuit equals the sum of output voltage of the ultrasonic sensor and threshold voltage of the driving transistor, and an output controlling sub-circuit configured to transmit a current signal output by the driving transistor to a signal reading circuit.
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