Authentication system including electric field sensor

Details Authentication system including electric field sensor Authentication system including electric field sensor

2008-07-18

2010-06-29

Lee, Seung H (Department: 2887)

Registers

Coded record sensors

Particular sensor structure

C235S375000, C235S380000, C235S382000, C235S487000, C235S492000, C235S494000

Reexamination Certificate

active

07743988

ABSTRACT:
An authentication system for reducing the power consumed during an authentication process and shortening the authentication time includes an electrode plate. The electrode plate has a unique shape that defines an authentication key. An electric field sensor detects capacitance corresponding to the shape of the electrode plate to generate a detection signal. A signal monitor compares the detection signal of the electric field sensor with a preset signal and generates a determination signal indicating the comparison result.

REFERENCES:
patent: 6025698 (2000-02-01), Kim
patent: 6457126 (2002-09-01), Nakamura
patent: 6509717 (2003-01-01), Lee
patent: 6975092 (2005-12-01), Edington
patent: 7426405 (2008-09-01), Lee
patent: 2005/0194452 (2005-09-01), Nordentoft et al.
patent: 2006/0097059 (2006-05-01), Miyazaki
patent: 2006/0113381 (2006-06-01), Hochstein et al.
patent: 2006/0196929 (2006-09-01), Kelley et al.
patent: 2007/0220272 (2007-09-01), Campisi et al.
patent: 2000-76063 (2000-03-01), None

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