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:
Mar. 06, 2007
Filed:
Aug. 31, 2003
Chien-sheng Yang, Taipei, TW;
Chien-Sheng Yang, Taipei, TW;
AU Optronics Corp., Hsin-Chu, TW;
Abstract
A fingerprint sensor for sensing a fingerprint has a detecting and processing circuit and a plurality of sensing units. Each of the sensing units has a switch element, a first resistor, and a second resistor. The switch element has a first terminal, a second terminal, and a third terminal. Resistance of the second resistor is fixed. The fingerprint influences an intensity of light illuminating the first resistor so that resistance of the first resistor and a voltage level of the second terminal change. When the switch elements are turned on, the detecting and processing circuit analyzes the fingerprint according to the voltage levels of the second terminals of the plurality switch elements.