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:
Nov. 26, 2013
Filed:
Sep. 13, 2012
Erik Jonathon Thompson, Phoenix, AZ (US);
Gregory Lewis Dean, Phoenix, AZ (US);
Jaswinder Jandu, Chandler, AZ (US);
Richard Alexander Erhart, Tempe, AZ (US);
Erik Jonathon Thompson, Phoenix, AZ (US);
Gregory Lewis Dean, Phoenix, AZ (US);
Jaswinder Jandu, Chandler, AZ (US);
Richard Alexander Erhart, Tempe, AZ (US);
Validity Sensors, Inc., San Jose, CA (US);
Abstract
An apparatus and method for detecting the presence of a finger on a fingerprint sensor is disclosed in one embodiment of the invention as including transmitting a probing signal, comprising a series of probing pulses, to a fingerprint sensing area. A response signal, comprising a series of response pulses, is received from the fingerprint sensing area in response to the probing signal. An upper reference signal is generated and finger activity is detected on the fingerprint sensing area by monitoring whether the peaks of the response pulses exceed the reference signal.