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:
Jan. 31, 2023
Filed:
Apr. 10, 2020
Beijing Boe Sensor Technology Co., Ltd., Beijing, CN;
Boe Technology Group Co., Ltd., Beijing, CN;
Binbin Liu, Beijing, CN;
Chen Meng, Beijing, CN;
Wei Shi, Beijing, CN;
Wenjie Zhong, Beijing, CN;
Zhong Hu, Beijing, CN;
Yongbo Wang, Beijing, CN;
Zhenghua Lu, Beijing, CN;
Dahai Hu, Beijing, CN;
Guo Liu, Beijing, CN;
Guoan Wang, Beijing, CN;
Jiarong Liu, Beijing, CN;
BEIJING BOE SENSOR TECHNOLOGY CO., LTD., Beijing, CN;
BOE TECHNOLOGY GROUP CO., LTD., Beijing, CN;
Abstract
A fingerprint recognition detection circuit includes an operational amplifier, an integrating capacitor and a first switch connected in series, and a second switch. A non-inverting input terminal of the operational amplifier is coupled to a reference voltage terminal, and an inverting input terminal of the operational amplifier is coupled to a fingerprint sensing capacitor. The integrating capacitor and the first switch are coupled between the inverting input terminal of the operational amplifier and an output terminal of the operational amplifier. The second switch is coupled between the inverting input terminal of the operational amplifier and the output terminal of the operational amplifier.