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Image capturing apparatus

  • US 10,726,240 B2
  • Filed: 11/20/2019
  • Issued: 07/28/2020
  • Est. Priority Date: 07/09/2015
  • Status: Active Grant
First Claim
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1. An image capturing apparatus comprising:

  • a light guide plate having a first surface, a second surface opposite to the first surface and a plurality of third surfaces each connecting the first surface to the second surface;

    a first light transmissive layer disposed on the first surface;

    a second light transmissive layer disposed on the second surface, wherein the second light transmissive layer is overlapped with a light transfer region of the light guide plate in a normal direction of the light guide plate, and the second light transmissive layer is not overlapped with a light penetration region of the light guide plate in the normal direction;

    a third light transmissive layer disposed on the second surface and overlapped with the light transfer region and the light penetration region in the normal direction, wherein a refractive index of the third light transmissive layer is higher than a refractive index of the first light transmissive layer and a refractive index of the second light transmissive layer, and a refractive index of the light guide plate is higher than the refractive index of the first light transmissive layer and the refractive index of the second light transmissive layer;

    a light source located below the first surface or beside one of the third surfaces; and

    an image capturing device located below the first surface.

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