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:
Aug. 27, 2019
Filed:
Sep. 29, 2017
Superc-touch Corporation, New Taipei, TW;
Hsiang-Yu Lee, New Taipei, TW;
Shang Chin, New Taipei, TW;
Ping-Tsun Lin, New Taipei, TW;
Chia-Cheng Lei, New Taipei, TW;
SUPERC-TOUCH CORPORATION, New Taipei, TW;
Abstract
A fingerprint identification device includes a plurality of fingerprint sensing electrodes, a shielding enhancement electrode, a fingerprint detection circuit and an auxiliary enhancement signal circuit. The shield enhancement electrode corresponds to a plurality of the fingerprint sensing electrodes. The fingerprint detection circuit is powered by a first power supply and includes a capacitive stimulation signal source. The auxiliary enhancement signal circuit is powered by a second power supply and includes an auxiliary enhancement signal source. The fingerprint detection circuit transmits a capacitive stimulation signal to a selected fingerprint sensing electrode, and receives a fingerprint sensing signal. The fingerprint sensing signal is amplified to generate a capacitive elimination shielding signal. The capacitive elimination shielding signal is transmitted to the shielding enhancement electrode. The auxiliary enhancement signal circuit outputs an auxiliary enhancement signal to the shielding enhancement electrode for performing a fingerprint detection operation.