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. 22, 2019
Filed:
Jul. 05, 2017
Applicant:
Sunasic Technologies Limited, Wanchai, HK;
Inventors:
Chi Chou Lin, New Taipei, TW;
Zheng Ping He, Taipei, TW;
Assignee:
SunASIC Technologies Limited, New Taipei, TW;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G06K 9/00 (2006.01); G06F 3/041 (2006.01); G06F 3/044 (2006.01);
U.S. Cl.
CPC ...
G06K 9/0002 (2013.01); G06F 3/044 (2013.01); G06F 3/0416 (2013.01); G06K 9/00087 (2013.01);
Abstract
A fingerprint sensing device and a method operating the fingerprint sensing device are provided. The fingerprint sensing device includes at least one sensing core, a system unit, at least one switching unit and a charge holding unit. The switching unit is connected between the sensing core and the system unit to provide four different operation states: a normal state; an isolation state; a drive-up state; and a drive-down state. A voltage shift between the finger and the sensing core is generated by controlling the switching unit to perform different operation states in various orders.