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. 18, 2022
Filed:
Mar. 31, 2020
Egis Technology Inc., Hsinchu, TW;
Ching-Ho Hung, Hsinchu County, TW;
Sheng-Ruei Hsu, Hsinchu County, TW;
Tzu-Yang Peng, Hsinchu County, TW;
Chi-Fang Hsieh, Hsinchu County, TW;
Egis Technology Inc., Hsinchu, TW;
Abstract
An optical fingerprint sensing apparatus is provided. A control circuit controls a first selection circuit to output at least one of fingerprint sensing signals on sensing signal lines, and controls a second selection circuit to output at least one of background noise signals on dummy sensing signal lines, so that the first selection circuit and the second selection circuit simultaneously output the fingerprint sensing signal and the background noise signal, respectively. The signal processing circuit cancels background noise of the fingerprint sensing signals according to the background noise signal.