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Light panel with improved diffraction

  • US 6,773,126 B1
  • Filed: 11/27/2001
  • Issued: 08/10/2004
  • Est. Priority Date: 05/28/1999
  • Status: Expired due to Term
First Claim
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1. A light panel, comprising:

  • at least one light source;

    a panel element operatively connected to the at least one light source, the panel element comprising a substantially transparent light transmitting material; and

    a diffractive outcoupling system arranged over at least a portion of a light surface of the panel element, the diffractive outcoupling system comprising a plurality of local grating elements, each of the plurality of local grating elements having a diffraction efficiency and comprising at least one pattern of at least one of grooves and recesses, the diffraction efficiency of the local grating elements varies over the outcoupling system as a function of location by varying at least one of filling factor, shape, profile, size, and orientation of the at least one of grooves and recesses over the diffractive outcoupling system.

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