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Prism sheet with curved surface and liquid crystal display device using same

  • US 8,558,969 B2
  • Filed: 08/04/2008
  • Issued: 10/15/2013
  • Est. Priority Date: 08/03/2007
  • Status: Active Grant
First Claim
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1. A prism sheet, comprising:

  • a base comprising an upper surface; and

    a plurality of lenses disposed on the upper surface;

    wherein in a cross-section of the prism sheet, the upper surface is a continuous curve having a plurality of wave crests in different sizes and a plurality of wave troughs in different sizes;

    wherein the upper surface is wavy along a first direction and extends out linearly in a second direction, the first direction being perpendicular to the second direction;

    wherein the plurality of lenses form a serrated surface along the first direction and extend out linearly in the second direction, and each of the plurality of lenses is a long straight column having a triangular cross-section being parallel to each other.

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