Invention Grant
- Patent Title: Fingerprint identification detection circuit, touch screen and display device
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Application No.: US15963288Application Date: 2018-04-26
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Publication No.: US10318788B2Publication Date: 2019-06-11
- Inventor: Pengpeng Wang , Haisheng Wang , Xiaoliang Ding , Yingming Liu , Chihjen Cheng , Wei Liu , Xueyou Cao , Ping Zhang , Changfeng Li , Yunke Qin
- 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: Calfee, Halter & Griswold LLP
- Priority: CN201710240020 20170413
- Main IPC: G06K9/00
- IPC: G06K9/00 ; G06K9/20 ; H01L27/146 ; G06F3/042 ; G06F3/041

Abstract:
A fingerprint identification detection circuit, a touch screen and a display device is disclosed. The fingerprint identification detection circuit can include a photosensitive diode, a first switch transistor, a second switch transistor and a voltage follower transistor, wherein the first switch transistor can include a metal oxide transistor, and the second switch transistor and the voltage follower transistor both can include a low-temperature polycrystalline silicon transistor. There is little current leaking from the first switch transistor by using the metal oxide transistor as the first switch transistor. Even in the case of low light intensity, photocurrent can be detected, which may thereby improve the detection precision of the fingerprint identification detection circuit.
Public/Granted literature
- US20180300527A1 FINGERPRINT IDENTIFICATION DETECTION CIRCUIT, TOUCH SCREEN AND DISPLAY DEVICE Public/Granted day:2018-10-18
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