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:
Apr. 14, 2020
Filed:
Aug. 23, 2018
Boe Technology Group Co., Ltd., Beijing, CN;
Chiehhsing Chung, Beijing, CN;
Chihlei Wu, Beijing, CN;
BOE TECHNOLOGY GROUP CO., LTD., Beijing, CN;
Abstract
A light detection circuit and a detection method thereof, and a light detection device are provided. The light detection circuit including a pixel circuit, a control unit, a counter, and a processor. The pixel circuit includes a phototransistor, a switching transistor, and an output sub-circuit. A first terminal of the output sub-circuit, a first electrode of the phototransistor, and a first electrode of the switching transistor are coupled to a first node, a gate of the phototransistor is coupled to a gradual change signal input line, a gate of the switching transistor is coupled to a scan line, and a second electrode of the switching transistor is coupled to the counter. The control unit is configured to control the counter to start counting under the control of a scan signal and a synchronization signal.