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OPTIMIZED SPATIAL POWER DISTRIBUTION FOR SOLID STATE LIGHT FIXTURES

  • US 20100085762A1
  • Filed: 10/02/2009
  • Published: 04/08/2010
  • Est. Priority Date: 10/03/2008
  • Status: Abandoned Application
First Claim
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1. A method for illuminating a work surface using a solid state lighting fixture, the method comprising:

  • generating light from a solid state light source;

    introducing the light from the solid state light source into a generally horizontally disposed planar light guide;

    reflecting some of the light from a reflector disposed adjacent to a horizontally disposed top surface of the light guide back into the light guide;

    introducing the light emitted from a horizontally disposed bottom surface of the light guide into at least one horizontally disposed optical element having a top surface disposed adjacent to the bottom surface of the light guide;

    emitting light from the at least one horizontally disposed optical element having a shifted spatial power distribution of light due to the at least one horizontally disposed optical element to more closely approximate a vertical Lambertian spatial power distribution and a horozontal Lambertian spatial power distribution compared to the spatial power distributions of the light without the at least one horizontally disposed optical element, the emitted light from the at least one horizontally disposed optical element comprising a total zonal lumens of at least about 90-percent of the total zonal lumens emitted without the at least one horizontally disposed optical element, and the emitted light is non-polarized and operable to generally accurately reproduce colors of objects; and

    illuminating the work surface with the non-polarized light having the shifted spatial power distribution to generally accurately reproduce colors of objects on the work surface.

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