The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 17, 2022
Filed:
Jul. 25, 2019
Boe Technology Group Co., Ltd., Beijing, CN;
Xiaoliang Ding, Beijing, CN;
Xue Dong, Beijing, CN;
Haisheng Wang, Beijing, CN;
Yingming Liu, Beijing, CN;
Wei Liu, Beijing, CN;
Bo Chen, Beijing, CN;
Xueyou Cao, Beijing, CN;
Pengpeng Wang, Beijing, CN;
Ping Zhang, Beijing, CN;
Likai Deng, Beijing, CN;
BOE TECHNOLOGY GROUP CO., LTD., Beijing, CN;
Abstract
A light detection circuit, an electronic device, and an optical recognition method are provided. The light detection circuit includes a charge storage sub-circuit (), a photoelectric conversion sub-circuit (), a signal collection sub-circuit (), and a potential pull-up sub-circuit (). When a potential of a reading node (A) is decreased by a preset value, the potential pull-up sub-circuit () changes the potential of the reading node (A) to an initial potential. A photoelectric diode may continuously generate a light current under the action of light, so that the potential of the reading node (A) is decreased again. Even when the intensity of ambient light is high, a touch can be accurately recognized in an optical touch recognition circuit, and ridge lines and valley lines can be accurately recognized in an optical fingerprint recognition circuit.