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:
Nov. 02, 2021
Filed:
Nov. 22, 2019
Novatek Microelectronics Corp., Hsinchu, TW;
Min Huang, Taoyuan, TW;
Novatek Microelectronics Corp., Hsinchu, TW;
Abstract
An optical fingerprint sensing apparatus and an anti-relative illumination (anti-RI) compensation method thereof are provided. The optical fingerprint sensing apparatus includes an optical fingerprint sensor module and a processing circuit. The optical fingerprint sensor module is configured to capture a fingerprint image frame. The processing circuit is coupled to the optical fingerprint sensor module to receive the fingerprint image frame. The processing circuit obtains an anti-RI gain value corresponding to a current pixel in the fingerprint image frame from a lookup table. The processing circuit compensates an original illumination of the current pixel using the anti-RI gain value to obtain a compensated illumination of the current pixel.