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Title:
FINGERPRINT RECOGNITION DETECTION CIRCUIT, TOUCH SCREEN AND DISPLAY APPARATUS
Document Type and Number:
WIPO Patent Application WO/2018/188298
Kind Code:
A1
Abstract:
Disclosed are a fingerprint recognition detection circuit, a touch screen and a display apparatus. The fingerprint recognition detection circuit may comprise: a photodiode, a first switch transistor, a second switch transistor and a voltage-follower transistor. The first switch transistor may comprise a metal oxide transistor, and both of the second switch transistor and the voltage-follower transistor may comprise a low-temperature polysilicon transistor. By using a metal oxide transistor as a first switch transistor, the leakage current of the first switch transistor is small, such that a photocurrent can be detected even in the case where the light intensity is very weak, thereby improving the detection precision of the fingerprint recognition detection circuit.

Inventors:
WANG, Pengpeng (No. 9, Dize Road BDA, Beijing 6, 100176, CN)
WANG, Haisheng (No. 9, Dize Road BDA, Beijing 6, 100176, CN)
DING, Xiaoliang (No. 9, Dize Road BDA, Beijing 6, 100176, CN)
LIU, Yingming (No. 9, Dize Road BDA, Beijing 6, 100176, CN)
CHENG, Chihjen (No. 9, Dize Road BDA, Beijing 6, 100176, CN)
LIU, Wei (No. 9, Dize Road BDA, Beijing 6, 100176, CN)
CAO, Xueyou (No. 9, Dize Road BDA, Beijing 6, 100176, CN)
ZHANG, Ping (No. 9, Dize Road BDA, Beijing 6, 100176, CN)
LI, Changfeng (No. 9, Dize Road BDA, Beijing 6, 100176, CN)
QIN, Yunke (No. 9, Dize Road BDA, Beijing 6, 100176, CN)
Application Number:
CN2017/106856
Publication Date:
October 18, 2018
Filing Date:
October 19, 2017
Export Citation:
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Assignee:
BOE TECHNOLOGY GROUP CO., LTD. (No.10 Jiuxianqiao Rd, Chaoyang District, Beijing 5, 100015, CN)
International Classes:
G06K9/00; G06F3/041
Foreign References:
CN106971172A2017-07-21
CN103353814A2013-10-16
CN105956584A2016-09-21
CN106292108A2017-01-04
US20100033450A12010-02-11
Attorney, Agent or Firm:
CHINA PATENT AGENT (H.K.) LTD. (22/F, Great Eagle Centre23 Harbour Road, Wanchai, Hong Kong, Kong, CN)
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