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Title:
OPTICAL DETECTION CIRCUIT AND DRIVING METHOD THEREFOR, AND FLAT PANEL DETECTOR
Document Type and Number:
WIPO Patent Application WO/2019/214400
Kind Code:
A1
Abstract:
An optical detection circuit, comprising: a photosensitive detector, configured to accumulate photo-generated charges at a first node when being irradiated by light; a transmitting circuit, configured to establish a current path to the first node in response to a first scanning signal being effective; an integral circuit, configured to selectively operate in a first mode or a second mode, in the first mode, the integral circuit being operated as an integrator to integrate photocurrent and transmit the integration result to a second node for readout, and in the second mode, a first input end of the integral circuit being conducted with the second node; and a reset circuit, configured to selectively supply a first voltage or a second voltage to a second input end of the integral circuit as a reference voltage. The second voltage is greater than the first voltage.

Inventors:
WANG, Zhiyong (No.9, Dize Road BDA, Beijing 6, 100176, CN)
XU, Shuai (No.9, Dize Road BDA, Beijing 6, 100176, CN)
SONG, Yong (No.9, Dize Road BDA, Beijing 6, 100176, CN)
GUO, Lei (No.9, Dize Road BDA, Beijing 6, 100176, CN)
Application Number:
CN2019/082627
Publication Date:
November 14, 2019
Filing Date:
April 15, 2019
Export Citation:
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Assignee:
BOE TECHNOLOGY GROUP CO., LTD. (No.10 Jiuxianqiao Rd, Chaoyang District, Beijing 5, 100015, CN)
BEIJING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD. (No.8 Xihuanzhonglu, BDA, Beijing 6, 100176, CN)
International Classes:
H04N5/30; G01J1/44; G01N23/00; H03M1/12
Foreign References:
CN108680587A2018-10-19
CN101604972A2009-12-16
US9264643B12016-02-16
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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