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LIGHTING DEVICE AND LIGHTING METHOD

  • US 20070267983A1
  • Filed: 04/18/2007
  • Published: 11/22/2007
  • Est. Priority Date: 04/18/2006
  • Status: Active Grant
First Claim
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1. A lighting device comprising:

  • a first group of solid state light emitters;

    a first group of lumiphors;

    a second group of solid state light emitters;

    a second group of lumiphors; and

    a third group of solid state light emitters;

    wherein;

    each of said first group of solid state light emitters and each of said second group of solid state light emitters, if illuminated, would emit light having a peak wavelength in the range of from 430 nm to 480 nm;

    each of said first group of lumiphors and each of said second group of lumiphors, if excited, would emit light having a dominant wavelength in the range of from about 555 nm to about 585 nm; and

    if each of said first group of solid state light emitters is illuminated and each of said first group of lumiphors is excited, a mixture of light emitted from said first group of solid state light emitters and said first group of lumiphors would, in the absence of any additional light, have a first group mixed illumination corresponding to a first point on a 1931 CIE Chromaticity Diagram, said first point having a first correlated color temperature;

    if each of said second group of solid state light emitters is illuminated and each of said second group of lumiphors is excited, a mixture of light emitted from said second group of solid state light emitters and said second group of lumiphors would, in the absence of any additional light, have a second group mixed illumination corresponding to a second point on a 1931 CIE Chromaticity Diagram, said second point has a second correlated color temperature, said first correlated color temperature differs from said second correlated color temperature by at least 50 K; and

    each of said third group of solid state light emitters, if illuminated, would emit light having a dominant wavelength in the range of from 600 nm to 630 nm.

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