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Multi-colored LED array with improved brightness profile and color uniformity

  • US 20050001537A1
  • Filed: 05/07/2004
  • Published: 01/06/2005
  • Est. Priority Date: 03/28/2003
  • Status: Active Grant
First Claim
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1. A light emitting device comprising:

  • a light mixing cavity having reflective side walls and a reflective bottom surface;

    a plurality of red, green, and blue light emitting diodes (LEDs) arranged on or near the bottom surface;

    a first diffuser substantially parallel with the bottom surface and located above the LEDs a first distance; and

    a second diffuser substantially parallel with the first diffuser and located above the LEDs a second distance, wherein the first distance is between approximately 25%-75% of the second distance.

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