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:
Dec. 30, 2025
Filed:
Oct. 22, 2021
Boe Technology Group Co., Ltd., Beijing, CN;
Xinshe Yin, Beijing, CN;
Tao Gao, Beijing, CN;
BOE Technology Group Co., Ltd., Beijing, CN;
Abstract
Disclosed are an optical sensing pixel circuit and a driving method therefor, and a sensor and a display panel. The optical sensing pixel circuit includes: a photodiode which is used for detecting an external optical signal and converting the optical signal into an electric signal; an amplification circuit which is electrically connected to the photodiode and used for amplifying the electric signal into a detectable large-current signal; and a constant current bias circuit which is electrically connected to an output end of the amplification circuit and used for providing a constant current for the amplification circuit so as to set a quiescent operating point having the same current as the constant current for the amplification circuit, such that the amplification circuit amplifies the electric signal on the basis of the quiescent operating point.