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. 29, 2008
Filed:
Aug. 12, 2004
Toshishige Shimamura, Kanagawa, JP;
Hiroki Morimura, Kanagawa, JP;
Satoshi Shigematsu, Kanagawa, JP;
Norio Sato, Kanagawa, JP;
Masami Urano, Kanagawa, JP;
Katsuyuki Machida, Kanagawa, JP;
Toshishige Shimamura, Kanagawa, JP;
Hiroki Morimura, Kanagawa, JP;
Satoshi Shigematsu, Kanagawa, JP;
Norio Sato, Kanagawa, JP;
Masami Urano, Kanagawa, JP;
Katsuyuki Machida, Kanagawa, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
A detection element (A) having a detection electrode (A) connected to a surface shape detection unit () and a detection electrode (A) connected to a common potential, and a detection element (B) having a detection electrode (B) connected to the surface shape detection unit () and a detection electrode (B) connected to a biometric recognition unit () are arranged. The surface shape detection unit () outputs a signal representing the three-dimensional pattern of the surface shape corresponding to the contact portion to each detection element on the basis of individual capacitances obtained from the detection elements (A,B). The biometric recognition unit () determines whether an object () is a living body, on the basis of a signal corresponding to the impedance of the object () connected between the detection electrode (B) of the detection element (B) and the detection electrode (A) of the detection element (A).