Biometric piezo scanner

Details Biometric piezo scanner Biometric piezo scanner

2007-06-26

2007-06-26

Mehta, Bhavesh M (Department: 2624)

Image analysis

Applications

Personnel identification

C073S514320, C361S280000

Reexamination Certificate

active

10049100

ABSTRACT:
A piezoelectric thin film sensor array is used to scan and capture biometric data, for example, a fingerprint image. In one embodiment, a multi-layer structure includes a PVDF layer in between two conductor grids arranged orthogonally to one another. Urethane can be added to one side where a finger is placed. A foam substrate can be used as a support. In one feature, the PVDF, and grids can be peeled off like a label for easy replacement. Multiplexers are switched to scan the sensor. A single pixel or a group of pixels can be detected and output to an image memory. The presence of a fingerprint ridge is detected by virtue of a ring-down oscillation that arises from reflection when an electric field is applied to the piezoelectric thin film sensor array at a pixel in contact with the fingerprint ridge. For example, such a ring-down value associated with a fingerprint ridge can be detected at about 150 ns. (or 5 cycles at 30 MHZ). Other reflections indicative of additional biometrics (e.g. from tissue, blood, bone, fingernail, etc.) can also be detected. A Doppler effect due to reflections from circulating blood can also be detected. Such a Doppler effect can provide further information about direction and speed of blood circulation. An instantaneous pyroelectric effect can also be detected to indicate a live finger presence.

REFERENCES:
patent: 4316115 (1982-02-01), Wilson et al.
patent: 4394773 (1983-07-01), Ruell
patent: 4429413 (1984-01-01), Edwards
patent: 4499394 (1985-02-01), Koal
patent: 4539554 (1985-09-01), Jarvis et al.
patent: 4555953 (1985-12-01), Dario et al.
patent: 4634917 (1987-01-01), Dvorsky et al.
patent: 4643028 (1987-02-01), Kondo et al.
patent: 4709342 (1987-11-01), Hosoda et al.
patent: 4814661 (1989-03-01), Ratzlaff et al.
patent: 4849668 (1989-07-01), Crawley et al.
patent: 5055838 (1991-10-01), Wise et al.
patent: 5079949 (1992-01-01), Tamori
patent: 5224174 (1993-06-01), Schneider et al.
patent: 5240004 (1993-08-01), Walinsky et al.
patent: 5273045 (1993-12-01), Chihara et al.
patent: 5305752 (1994-04-01), Spivey et al.
patent: 5311095 (1994-05-01), Smith et al.
patent: 5339051 (1994-08-01), Koehler et al.
patent: 5365154 (1994-11-01), Schneider et al.
patent: 5389849 (1995-02-01), Asano et al.
patent: 5421335 (1995-06-01), Wild
patent: 5424596 (1995-06-01), Mendenhall et al.
patent: 5456256 (1995-10-01), Schneider et al.
patent: 5500635 (1996-03-01), Mott
patent: 5515738 (1996-05-01), Tamori
patent: 5526701 (1996-06-01), Tamori
patent: 5552274 (1996-09-01), Oyama et al.
patent: 5578761 (1996-11-01), Clark, Jr. et al.
patent: 5587533 (1996-12-01), Schneider et al.
patent: 5623930 (1997-04-01), Wright et al.
patent: 5647364 (1997-07-01), Schneider et al.
patent: 5673041 (1997-09-01), Chatigny et al.
patent: 5689576 (1997-11-01), Schneider et al.
patent: 5760530 (1998-06-01), Kolesar
patent: 5844287 (1998-12-01), Hassan et al.
patent: 5902240 (1999-05-01), Ishii et al.
patent: 5935071 (1999-08-01), Schneider et al.
patent: 5971927 (1999-10-01), Mine
patent: 6061464 (2000-05-01), Leger
patent: 6095979 (2000-08-01), Ohtomo
patent: 6111342 (2000-08-01), Muramatsu et al.
patent: 6117075 (2000-09-01), Barnea
patent: 6131464 (2000-10-01), Pare et al.
patent: 6289114 (2001-09-01), Mainguet
patent: 6296610 (2001-10-01), Schneider et al.
patent: 6411726 (2002-06-01), Pires
patent: 6437583 (2002-08-01), Tartagni et al.
patent: 6459804 (2002-10-01), Mainguet
patent: 6461314 (2002-10-01), Pant et al.
patent: 6517487 (2003-02-01), Mazess et al.
patent: 6522773 (2003-02-01), Houdeau
patent: 6714666 (2004-03-01), Morimura et al.
patent: 6817130 (2004-11-01), Ivanov
patent: 2001/0026636 (2001-10-01), Mainguet
patent: 197 50 179 (1999-02-01), None
patent: 0 649 116 (1995-04-01), None
patent: 7-059769 (1995-03-01), None
patent: 8-336534 (1995-12-01), None
patent: WO 01/18740 (2001-03-01), None
patent: WO 01/19016 (2001-03-01), None
patent: WO01/67383 (2001-09-01), None
patent: WO 01/91626 (2001-12-01), None
patent: WO02/12660 (2002-02-01), None
patent: WO02/48485 (2002-05-01), None
patent: WO03/15011 (2003-02-01), None
Davidsen, R. and Smith, S., “Two-Dimensional Array for Medical Ultrasound Using Multilayer Flexible Circuit Interconnection,”IEEE Transactions on Ultrasonics Ferroelectrics, and Frequency Control, IEEE, vol. 45, No. 2, pp. 338-348 (Mar. 1998).
Schneider et al., “Live Scan Fingerprint Imagery Using High Resolution C-Scan Ultrasonography,”Proceedings of the 25thAnnual 1991 IEEE Int'l Carnahan Conference on Security Technology, IEEE, Oct. 1-3, 1991, Taipei, Taiwan, pp. 89-95.
Patent Abstract of Japanese Publication No. 08336534, Japanese Patent Office, 1 page (Dec. 1996).
Patent Abstract of Japanese Publication No. 07059769, Japanese Patent Office, 1 page (Mar. 1995).
Gary Roethenbaugh, “Biometrics Explained,” v. 2.0, International Computer Security Association, Carlisle, PA (1998), pp. 1-34.
Dialog File 349 (PCT Full Text) (1 page) English Language abstract of Patent WO 9910874, published Mar. 4, 1999.
Gary Roethenbaugh, “Biometrics Explained,” v. 2.0, International Computer Security Association, Carlisle, PA (1998), pp. 1-24 and 27-34.

Affiliated with

Also associated with

Rating

Biometric piezo scanner does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Biometric piezo scanner, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Biometric piezo scanner will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3869088