Biological detection device, fingerprint authentication...

Image analysis – Applications – Personnel identification

Reexamination Certificate

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Details

C382S115000, C382S124000, C340S005820, C361S189000, C600S547000

Reexamination Certificate

active

07907754

ABSTRACT:
A further object of the present invention is to provide a biological detection device and the like capable of performing processing promptly. An input voltage with a predetermined frequency is output from an oscillating portion. By performing switching using an analog switch, the input voltage is output to an electrode via a first resistance portion. A first comparator detects an output voltage, compares the voltage with a first reference threshold stored in a storage portion, and outputs an output. Furthermore, by performing switching using the analog switch, an input voltage is output to the electrode via a second resistance portion. A second comparator detects an output voltage, compares the voltage with a second reference threshold, and outputs an output. A determination portion determines whether a test body is a living finger or a gummy finger in accordance with a combination of the values of the outputs.

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Extended European Search Report, mailed Jul. 9, 2007 and issued in corresponding European Patent Application No. 06117532.9-2218.

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