Invention Grant
- Patent Title: Palmprint recognition circuit based on LTPS technology, a palmprint recognition method and a display screen
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Application No.: US15300107Application Date: 2015-09-29
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Publication No.: US10339358B2Publication Date: 2019-07-02
- Inventor: Xiaoliang Ding , Xue Dong , Haisheng Wang , Xiaochuan Chen , Yingming Liu , Shengji Yang , Lei Wang , Wei Liu , Weijie Zhao , Changfeng Li , Tao Ren
- Applicant: BOE Technology Group Co., Ltd. , Beijing BOE Optoelectronics Technology Co., Ltd.
- Applicant Address: CN Beijing CN Beijing
- Assignee: BOE TECHNOLOGY GROUP CO., LTD.,BEIJING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
- Current Assignee: BOE TECHNOLOGY GROUP CO., LTD.,BEIJING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
- Current Assignee Address: CN Beijing CN Beijing
- Agency: Westman, Champlin & Koehler, P.A.
- Priority: CN201510368475 20150629
- International Application: PCT/CN2015/091038 WO 20150929
- International Announcement: WO2017/000405 WO 20170105
- Main IPC: G06K9/00
- IPC: G06K9/00 ; G09G3/36

Abstract:
The disclosure provides a palmprint recognition circuit based on a LTPS technology, a palmprint recognition method and a display screen. The palmprint recognition circuit comprises an optical signal collecting unit, configured to collect an optical signal indicating a palmprint information and convert the collected optical signal into a current signal; a current signal amplifying unit, configured to amplify the converted current signal; and a current signal detecting unit, and configured to detect an intensity of the amplified current signal which indicates a ridge line or a valley line of the palmprint in the palmprint information. Therefore, it can solve the problem of having no palmprint recognition circuit and method for a LTPS-TFT display panel. This can eliminate an influence of a change of parasitic capacitance on the recognition result, wherein the change of parasitic capacitance is caused by a change of a wiring manner in the circuit.
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