Light redirecting film systems having pattern of variable optical elements

  • US 7,914,196 B2
  • Filed: 03/25/2008
  • Issued: 03/29/2011
  • Est. Priority Date: 06/27/1995
  • Status: Active Grant
First Claim
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1. A light redirecting film system comprising a backlight including at least one input edge for receiving light from a light source, and at least one light output surface for emitting light, the backlight having deformities that cause most of the light entering the input edge to be emitted from the light output surface at relatively low angles, and a light redirecting film in close proximity to the light output surface for receiving light emitted from the light output surface, the light redirecting film having a pattern of individual optical elements of well-defined shape that vary at different locations on the film to redistribute the light emitted from the light output surface toward a direction normal to the film.

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