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:
Apr. 11, 2006
Filed:
Sep. 08, 2003
Applicants:
Manfred Greschitz, Graz, AT;
Gerhard Hierz, Graz, AT;
Albert Scheucher, St. Veit/Vogau, AT;
Franz Wolf, Graz, AT;
Inventors:
Manfred Greschitz, Graz, AT;
Gerhard Hierz, Graz, AT;
Albert Scheucher, St. Veit/Vogau, AT;
Franz Wolf, Graz, AT;
Assignee:
Infineon Technologies AG, Munich, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06K 9/00 (2006.01); B42D 15/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention relates to fingerprint sensors. A fingerprint sensor has a plurality of sensor electrodes below a surface intended for contacting the underside of a finger. At least one protective electrode is mounted on the surface. The sensor electrodes can have a first AC voltage at a prescribed frequency applied to them. The protective electrode can have a second AC voltage, which is essentially at the prescribed frequency, applied to it.