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LIGHTING DEVICE AND LIGHTING METHOD

  • US 20080084685A1
  • Filed: 08/22/2007
  • Published: 04/10/2008
  • Est. Priority Date: 08/23/2006
  • Status: Active Grant
First Claim
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1. A lighting device comprising:

  • at least one solid state light emitter; and

    at least one lumiphor;

    wherein;

    if each of said at least one solid state light emitter is illuminated and each of said at least one lumiphor is excited, a mixture of light emitted from said at least one solid state light emitter and said at least one lumiphor would, in the absence of any additional light, have a mixed illumination having x, y color coordinates which define a point which is within an area on a 1931 CIE Chromaticity Diagram enclosed by first, second, third, fourth and fifth line segments, said first line segment connecting a first point to a second point, said second line segment connecting said second point to a third point, said third line segment connecting said third point to a fourth point, said fourth line segment connecting said fourth point to a fifth point, and said fifth line segment connecting said fifth point to said first point, said first point having x, y coordinates of 0.32, 0.40, said second point having x, y coordinates of 0.36, 0.48, said third point having x, y coordinates of 0.43, 0.45, said fourth point having x, y coordinates of 0.42, 0.42, and said fifth point having x, y coordinates of 0.36, 0.38, and said at least one lumiphor comprises phosphor particles, at least some of said phosphor particles having particle sizes in the range of from about 3 micrometers to about 7 micrometers.

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