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White light illumination device

  • US 9,506,626 B2
  • Filed: 09/22/2014
  • Issued: 11/29/2016
  • Est. Priority Date: 03/22/2012
  • Status: Active Grant
First Claim
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1. An illumination device for generating white light, comprising:

  • a light source that generates blue light;

    a converter that converts the blue light into yellow light of a color location near a white point in a chromaticity diagram, the converter comprising a material providing conversion of the blue light into the yellow light with a quantum efficiency of more than 70% at operating temperatures in a range from 200°

    C. to 250°

    C.; and

    a filter that attenuates a green light component of the yellow light emitted from the converter to obtain the white light.

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