Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2001-03-23
2004-04-13
Budd, Mark (Department: 2834)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
C310S316010, C310S319000, C310S328000
Reexamination Certificate
active
06720712
ABSTRACT:
STATEMENT REGARDING FEDERALLY-SPONSORED RESEARCH AND DEVELOPMENT
Not applicable.
REFERENCE TO MICROFICHE APPENDIX/SEQUENCE LISTING/TABLE/COMPUTER PROGRAM LISTING APPENDIX (submitted on a compact disc and an incorporation-by-reference of the material on the compact disc)
Not applicable.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to a piezoelectric identification device and applications thereof. More particularly, it relates to a piezoelectric device for obtaining biometric information, such as a fingerprint, and using the obtained information to recognize and/or identify an individual.
2. Background Art
Biometrics are a group of technologies that provide a high level of security. Fingerprint capture and recognition is an important biometric technology. Law enforcement, banking, voting, and other industries increasingly rely upon fingerprints as a biometric to recognize or verify identity. See,
Biometrics Explained,
v. 2.0, G. Roethenbaugh, International Computer Society Assn. Carlisle, Pa. 1998, pages 1-34 (incorporated herein by reference in its entirety).
Optical fingerprint scanners are available which detect a reflected optical image of a fingerprint. To capture a quality image at a sufficiently high resolution, optical fingerprint scanners require at minimum optical components (e.g., lenses), an illumination source, and an imaging camera. Such components add to the overall cost of a fingerprint scanner. Mechanical structures to maintain alignment also increase manufacturing and maintenance costs.
Solid-state silicon-based transducers are also available in fingerprint scanners sold commercially. Such silicon transducers measure capacitance. This requires the brittle silicon transducers to be within a few microns of the fingerprint sensing circuit reducing their durability. To detect a rolled fingerprint, the sensing array of the solid-state transducer needs to have an area of 1 inch×1 inch and a thickness of about 50 microns. This is a big geometry for silicon that increases the base cost of a fingerprint scanner and leads to greater maintenance costs. Durability and structural integrity are also more likely to suffer in such a large silicon geometry.
What is needed is an inexpensive, durable fingerprint scanner with low maintenance costs. What is also needed is a low cost biometric device that can protect the individuals and the general populace against physical danger, fraud, and theft (especially in the realm of electronic commerce).
BRIEF SUMMARY OF THE INVENTION
The invention provides a device, system, and method for obtaining biometric data from a biological object. In accordance with the invention, a biological object (e.g., a finger or hand) is placed proximate to a piezoelectric sensor, and the sensor is operated to obtain an output. This output is then processed to produce the biometric data. For example, a device according to the invention can capturing a fingerprint, form a three-dimensional map of a finger bone, and/or determine the direction and speed of arteriole and/or capillary blood flow in a finger.
In accordance with the invention, a piezoelectric sensor array is used to obtain the biometric data. In one embodiment, a piezo ceramic sensory array is used to obtain the data. In another embodiment, a multi-layer sensor array structure having a PVDF of a piezo ceramic layer in between two conductor grids orthogonal to one another is used to obtain the data. Urethane can be added to one side of the senor array where, for example, a finger is placed. A foam substrate can be used as a support. Multiplexers according to the invention are switched to control the sensor array.
In an embodiment, the invention comprises a piezoelectric sensor, and a processor, coupled to the sensor, that receives an input from the sensor and produces biometric data. Devices and/or systems according to embodiments of the invention are capable operating in one or more modes to obtain a variety of biometric data. These operating modes include an impedance detection mode, a voltage detection mode, an ultrasonic transmission and echo detection mode, an imaging mode, and a Doppler-shift detection mode. The presence of a fingerprint on a sensor according to the invention can be used to turn-on a device. A single pixel or a group of pixels can then be detected and readout to a memory.
It is a feature of the invention that embodiments can be used to recognize and/or verify the identity of individuals.
It is a feature of this invention that it can operate as part of a personal area network, using a “public service layer” according to the invention.
It is another feature of the invention that embodiments can be used to control and/or restrict access.
A further feature of the invention is that embodiments can be used as an electronic signature device.
Further features and advantages of the present invention, as well as the structure and operation of various embodiments of the present invention, are described in detail below with reference to the accompanying drawings.
REFERENCES:
patent: 4316115 (1982-02-01), Wilson et al.
patent: 4394773 (1983-07-01), Ruell
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: 5224174 (1993-06-01), Schneider et al.
patent: 5273045 (1993-12-01), Chihara et al.
patent: 5311095 (1994-05-01), Smith et al.
patent: 5321765 (1994-06-01), Costello
patent: 5339051 (1994-08-01), Koehler et al.
patent: 5365154 (1994-11-01), Schneider 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: 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: 5689576 (1997-11-01), Schneider et al.
patent: 5760530 (1998-06-01), Kolesar
patent: 5844287 (1998-12-01), Hassan et al.
patent: 5935071 (1999-08-01), Schneider et al.
patent: 5971927 (1999-10-01), Mine
patent: 6002786 (1999-12-01), Hallibert et al.
patent: 6061464 (2000-05-01), Leger
patent: 6111342 (2000-08-01), Muramatsu et al.
patent: 6162485 (2000-12-01), Chang
patent: 6234031 (2001-05-01), Suga
patent: 6296610 (2001-10-01), Schneider et al.
patent: 6461314 (2002-10-01), Pant et al.
patent: 197 50 179 (1999-02-01), None
patent: 0 649 116 (1995-04-01), None
patent: WO 01/18740 (2001-03-01), None
patent: WO 01/19016 (2001-03-01), None
patent: WO 01/673783 (2001-09-01), None
patent: WO 01/91626 (2001-12-01), None
patent: WO 02/12660 (2002-02-01), None
patent: WO 02/48485 (2002-06-01), None
patent: WO 03/015011 (2003-02-01), None
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, 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).
Dialog File 349 (PCT Full Text) (1 page) English Language Patent Abstract for DE 197 50 179 A1 (DE 197 50 179 A1 published Feb. 25, 1999).
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).
Gary Roethenbaugh, “Biometrics Explained,” v. 2.0, International Computer Security Association, Carlisle, PA (1998) pp. 1-34.
Jones Donald E.
Scott Walter G.
Budd Mark
Cross Match Technologies, Inc.
Sterne Kessler Goldstein & Fox P.L.L.C.
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