发明名称 |
PIEZOELECTRIC IDENTIFICATION DEVICE AND APPLICATIONS THEREOF |
摘要 |
An identification device having a piezoelectric sensor array is used to obtain biometric data. In one embodiment, a piezo ceramic sensory array is used to obtain biometric data. In another embodiment, a multi-layer sensor array structure having a PVDF layer in between two conductor grids orthogonal to one another is used to obtain biometric data. Urethane can be added to one side of the sensor array where a finger is placed. A foam substrate can be used as a support. Multiplexers are switched to control the sensor. The device has several operating modes for obtaining a variety of biometric data, including an impedance detection mode, a voltage detection mode, an imaging mode, and a Doppler-shift detection mode. The presence of a fingerprint on the sensor can be used to turn-on the device. The device is capable of capturing a fingerprint, forming a three-dimensional map of a finger bone, and/or determining the direction and speed of arteriole and/or capillary blood flow in a finger. A single pixel or a group of pixels can be detected and readout to a memory. The device can be used as an electronic signature device. The device can operate as part of a personal area network, using a public service layer according to the invention. |
申请公布号 |
WO0171648(A3) |
申请公布日期 |
2002.03.28 |
申请号 |
WO2001US09187 |
申请日期 |
2001.03.23 |
申请人 |
CROSS MATCH TECHNOLOGIES, INC. |
发明人 |
SCOTT, WALTER, GUY;JONES, DONALD, EDWARD |
分类号 |
A61B5/0295;A61B5/0285;A61B5/117;A61B8/06;A61B8/08;G06K9/00;G06T1/00;H01L41/08;H01L41/113;H02N2/00;H04R17/00 |
主分类号 |
A61B5/0295 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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