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Frontlit display

  • US 6,592,234 B2
  • Filed: 04/06/2001
  • Issued: 07/15/2003
  • Est. Priority Date: 04/06/2001
  • Status: Expired due to Term
First Claim
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1. An illuminated display comprising:

  • a) at least one light source;

    b) a front light guide having at least one light input face through which light from the source can be supplied to the light guide, a viewing face, and a light output face opposite the viewing face, the light output face having a light extraction thereon, the extraction layer having a substantially flat light exit face and containing buried reflective facets that extract supplied light from the light guide through the light exit face; and

    c) a reflective light valve that receives extracted light from the light guide and returns at least some of that light through the viewing face wherein the facets have varied dimensions, pitch or angular orientation such that the supplied light is evenly distributed across the viewing face.

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