Scanning capacitive semiconductor fingerprint detector
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United States of America Patent
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-
Nov 13, 2001
Grant Date -
N/A
app pub date -
Jan 13, 1998
filing date -
Jan 13, 1998
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A scanning fingerprint detection system that includes an array of capacitive sensing elements. The array has a first dimension greater than the width of a fingerprint and a second dimension less than the length of a fingerprint. Each of the capacitive sensing elements has a size less than the width of a fingerprint ridge. Circuitry is provided for scanning the array to capture an image of a portion of fingerprint and for assembling the captured images into a fingerprint image as a fingerprint is moved over the array.
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