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Prism sheet, backlight unit and liquid crystal display

  • US 20070263412A1
  • Filed: 09/28/2006
  • Published: 11/15/2007
  • Est. Priority Date: 05/09/2006
  • Status: Active Grant
First Claim
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1. A backlight unit configured to illuminate a liquid crystal panel, comprising:

  • at least one light source generating light to be provided to the liquid crystal panel; and

    at least one prism sheet disposed at the back of the liquid crystal panel to collimate the light such that the light through the prism sheet becomes substantially perpendicular to the viewing plane of the liquid crystal panel, the prism sheet including;

    a protective layer including a base material consisting of a light-transmissive resin; and

    a plurality of diffusion particles distributed in the protective layer to scatter the light input into the base material;

    a base film disposed on a surface of the protective layer, wherein the light emitted from the protective layer is input into the base film; and

    a plurality of linear prisms having a pitch of between about 32 μ

    m and about 36 μ

    m and disposed in parallel on a surface of the base film.

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