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Fingerprint and palmprint image collector with honeycomb structure, and terminal device

  • US 10,482,304 B2
  • Filed: 10/28/2015
  • Issued: 11/19/2019
  • Est. Priority Date: 01/29/2015
  • Status: Active Grant
First Claim
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1. A fingerprint and palmprint image collector with a honeycomb structure, comprising:

  • a light guide plate and a light source for emitting at least part of light into the light guide plate, wherein a honeycomb plate is disposed at one surface of the light guide plate, a plurality of vias parallel to each other are densely disposed on the honeycomb plate, diameters of the plurality of vias are in a range from 0.5 micrometer to 50 micrometers, a size of an acquired fingerprint and palmprint is equal to a size of an acquired image, a thickness of the honeycomb plate is more than five times the diameters of the vias, a distance between centers of adjacent vias is less than or equal to 50.8 micrometers, and an image sensor is disposed on the other surface of the honeycomb plate,wherein, the light source is fixed on the light guide plate through a support which is provided with a light guide groove, and the light source is disposed in the light guide groove, wherein the light guide groove is configured to control an angle between a normal line and light emitted into the light guide plate from the light source through the light guide groove to be in a range from arcsin(n0/n2) to arcsin(n1/n2), where n0 refractive index of air, n1 is a refractive index of liquid on a surface of an object contacting the light guide plate, and n2 is a refractive index of the light guide plate.

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