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Film, backlight displays, and methods for making the same

  • US 7,859,759 B2
  • Filed: 06/18/2008
  • Issued: 12/28/2010
  • Est. Priority Date: 05/20/2002
  • Status: Expired due to Fees
First Claim
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1. A film, comprising:

  • a surface comprising a plurality of prism structures, wherein each prism structure has a lateral modulation in a w direction of ±

    2% to ±

    20% of an average pitch of the prism structures;

    wherein the plurality of prism structures have a variation in the w direction of prism peak height that is discrete and/or continuous; and

    wherein with a highest prism peak height is periodic at an interval measured in the w direction of greater than or equal to five times an average pitch, wherein the average pitch is determined over a sample length in the w direction of 100 mm, wherein the interval w direction is perpendicular to the l direction.

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