Fingerprint sensor with potential modulation of the ESD protective grating
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United States of America Patent
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Apr 11, 2006
Grant Date -
Aug 12, 2004
app pub date -
Sep 8, 2003
filing date -
Mar 6, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
The invention relates to fingerprint sensors. A fingerprint sensor has a plurality of sensor electrodes below a surface intended for contacting the underside of a finger. At least one protective electrode is mounted on the surface. The sensor electrodes can have a first AC voltage at a prescribed frequency applied to them. The protective electrode can have a second AC voltage, which is essentially at the prescribed frequency, applied to it.
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