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EDGE SHADOW REDUCING METHODS FOR PRISMATIC FRONT LIGHT

  • US 20090303746A1
  • Filed: 06/04/2009
  • Published: 12/10/2009
  • Est. Priority Date: 06/04/2008
  • Status: Abandoned Application
First Claim
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1. An illumination apparatus comprising:

  • a light source;

    a light guide having first and second ends and a length therebetween such that light from the light source injected into said first end of the light guide propagates toward the second end, said light guide comprising non-overlapping first and second regions along said second end; and

    a plurality of turning features in the light guide that reflect light incident thereon out the light guide, the turning features in said light guide generally facing a first region at said second end of said light guide such that light injected into said first end of said light guide is configured to be more efficiently reflected out from said first region of said light guide than from said second region,wherein said light source is configured to direct more light into said light guide towards a second region at said second end of said light guide rather than towards the first region of said light guide thereby increasing uniformity of light output across said light guide.

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