Piezoelectric biometric identification device and applications thereof

Using the identifying device having a piezo-electric sensor array to obtain biometric data. In one embodiment, using the piezoelectric ceramic sensor array to obtain biometric data. In another embodiment, a sensor array using a multi-layer structure with a PVDF layer between the two conductors of the grid perpendicular to each other to obtain biometric data. Your fingers can be added to the urethane to one side of the sensor array laid. The foam substrate may be used as a support. The multiplexer is switched to control the sensors. Identification device has several operation modes for obtaining the biometric data of the various impedance detection mode, the voltage detection mode, the imaging mode and Doppler shift detection mode. Can be turned on the identification device by using the fingerprint is present on the sensor. Identification device is capable of performing the measurement of the three-dimensional map is formed, and / or arterioles and / or the direction and speed of blood flow in the capillaries in the finger in the fingerprint of the captured finger bones. A pixel or group of pixels is detected and can be read into memory. It can be used to identify the device as an electronic signature device. Identification device is operable as part of a personal area network using a public service layer in accordance with the present invention.