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Fingerprint identifying system using a set of microstructure layers formed on one of top and bottom faces of light-transmissive finger press plate

  • US 8,204,284 B2
  • Filed: 07/10/2009
  • Issued: 06/19/2012
  • Est. Priority Date: 02/19/2009
  • Status: Active Grant
First Claim
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1. A fingerprint identifying system comprising:

  • a light source;

    a light-transmissive finger press plate disposed to receive light from said light source, and having a top face adapted to contact a finger, a bottom face, and at least one first microstructure layer formed on at least one of said top and bottom faces of said light-transmissive finger press plate for guiding the light received from said light source to uniformly scatter;

    an image-capturing unit disposed below said light-transmissive finger press plate; and

    a light-diffusing member disposed below said light-transmissive finger press plate and above said image-capturing unit, and having a through hole to permit said image-capturing unit to receive light reflected from the finger, said light source being disposed below said light-diffusing member, said light-diffusing member having a second microstructure layer.

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