Compact fingerprint recognizing apparatus illuminated with electroluminescent device
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United States of America Patent
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-
Jul 14, 1998
Grant Date -
N/A
app pub date -
Apr 15, 1996
filing date -
Apr 15, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A fingerprint recognizing apparatus includes: a prism, an electroluminescent device secured or adhered on an incident surface of the prism for emitting a uniform light towards a finger-laying surface of the prism with the light beam reflected at the valleys of the fingerprint, a photosensor selected from a charge-coupled-device (CCD) sensing camera for picking up the image as reflected from the prism for converting the image signal to be a voltage signal, and an image processing and recognizing circuit for processing the voltage signal for fingerprint identification, wherein the energizing of the ELD is synchronized with the image processing and recognizing for a reliable fingerprint recognization.
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