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. 06, 2018
Filed:
Jan. 04, 2017
Elan Microelectronics Corporation, Hsin Chu, TW;
Chao-Chi Yang, Hsinchu, TW;
Jui-Che Lin, Miaoli County, TW;
Tung-An Yao, Hsinchu, TW;
Chung-Han Cheng, Kaohsiung, TW;
Chung-An Tang, Zhubei, TW;
ELAN MICROELECTRONICS CORPORATION, Hsin Chu, TW;
Abstract
A fingerprint sensing system has a fingerprint sensing device and a power supply circuit. The fingerprint sensing device has a high-voltage input terminal and a low-voltage input terminal. During scan phases of the fingerprint sensing device, the power supply circuit provides a first voltage to the high voltage input terminal and provides a second voltage to the low voltage input terminal. During the read phases of the fingerprint sensing device, the power supply circuit provides a third voltage to the high voltage input terminal and provides a fourth voltage to the low voltage input terminal. A first voltage difference is between the first voltage and the second voltage. A second voltage difference is between the third voltage and the fourth voltage. The first voltage difference is greater than the second voltage difference.