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:
Feb. 03, 2009
Filed:
Jan. 25, 2005
Hiroyuki Hara, Chino, JP;
Mitsutoshi Miyasaka, Suwa, JP;
Hiroyuki Hara, Chino, JP;
Mitsutoshi Miyasaka, Suwa, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
Aspects of the invention can provide a fingerprint sensor for searching for a detection condition in a short period of time in order to read information of ridges and valleys of a fingerprint as changes in capacitance. The fingerprint sensor of the invention can include a plurality of capacitance detection circuits that output a detection signal having ridge/valley information of a fingerprint based on capacitance formed between the sensor and a fingertip surface, a fingerprint detection part in which the plurality of capacitance detection circuits are arranged to intersect with one another in a row direction and a column direction, a plurality of scanning lines, a scanning line driver for driving the scanning line, a plurality of data lines, a data line driver for driving the data line, and search device for searching for a detection condition of ridge/valley information by changing detection conditions of the ridge/valley information in a state that the plurality of capacitance detection circuits arranged along any one of the plurality of scanning lines are being selected.