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ILLUMINATION DEVICE WITH LIGHT DIFFUSION PLATE

  • US 20100246173A1
  • Filed: 11/04/2009
  • Published: 09/30/2010
  • Est. Priority Date: 03/26/2009
  • Status: Abandoned Application
First Claim
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1. An illumination device comprising:

  • a solid-state light source configured for generating light, the solid-state light source defining a central axis;

    a light diffusion plate arranged generally adjacent to the solid-state light source, the plate comprising an incident surface and an output surface at opposite sides thereof, the incident surface positioned for receiving the light from the solid-state light source, and the output surface being for emission of the light to the outside of the illumination device, at least one of the incident surface and the output surface having a plurality of parallel first micro-structures each having a length parallel to a first reference axis, the first micro-structures being arranged in two groups at opposite sides of the central axis, the first micro-structures of the two groups being symmetrical relative to each other across the central axis, and the first micro-structures configured for increasing a radiating range of the light entering the plate, the increase of one of the groups of first micro-structures being along one direction of a second reference axis, the increase of the other group of first micro-structures being along an opposite direction of the second reference axis, the second reference axis being substantially perpendicular to the first reference axis.

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