Light guiding film, direct type backlight module and display device

  • US 10,670,916 B2
  • Filed: 01/08/2019
  • Issued: 06/02/2020
  • Est. Priority Date: 04/18/2018
  • Status: Active Grant
First Claim
Patent Images

1. A direct type backlight module, comprising:

  • a substrate;

    a light source disposed on the substrate; and

    a light guiding film disposed on the substrate, the light guiding film comprising a plurality of prism bodies arranged as an array, and having a first surface and a second surface oppositely disposed;

    wherein the first surface is a light exiting surface, and a respective space is disposed between two adjacent one of the plurality of prism bodies, each of the plurality of prism bodies is configured to refract light incident into the respective space to form refracted light, such that the refracted light is totally reflected in each of the plurality of prism bodies to form total reflection light,wherein the light source is located in the space, andwherein the direct type backlight module comprises;

    a first brightness enhancement film disposed on the first surface;

    a diffusion film disposed on a side of the first brightness enhancement film away from the light guiding film; and

    a second brightness enhancement film disposed between the first brightness enhancement film and the diffusion film;

    wherein a second prism body on the second brightness enhancement film and a first prism body on the first brightness enhancement film are disposed perpendicular to each other.

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