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Method of producing a wavelength-converting casting composition

  • US 7,235,189 B2
  • Filed: 12/06/2000
  • Issued: 06/26/2007
  • Est. Priority Date: 09/20/1996
  • Status: Expired due to Fees
First Claim
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1. A method of producing a wavelength-converting casting composition for application on an ultraviolet, blue or green light emitting body, the wavelength-converting casting composition containing luminous substance pigments having grain sizes ≦

  • 20 μ

    m and a mean grain diameter d50

    5 μ

    m, the method which comprises;

    providing a base of transparent epoxy casting resin;

    providing the luminous substance pigments from a phosphorus group having the general formula A3B5X12;

    M, where A is at least one element selected from the group consisting of Y, Gd, Lu, Sc. and La;

    B is at least one element selected from the group consisting of Al and Ga;

    X is oxygen; and

    M is at least one element selected from the group consisting of Ce, Eu, Cr, Nd, Er, and Tb; and

    mixing the luminous substance pigments with the base.

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