Wavelength-converting casting composition and its use
DC CAFCFirst Claim
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1. A wavelength-converting casting composition, for converting a wavelength of ultraviolet, blue or green light emitted by an electroluminescent component, comprising:
- a transparent epoxy casting resin;
an inorganic luminous substance pigment powder dispersed in said transparent epoxy resin, said pigment powder comprising luminous substance pigments from a phosphorus group having the general formula A3 B5 X12 ;
M, where A is an element selected from the group consisting of Y, Ca, Sr;
B is an element selected from the group consisting of Al, Ga, Si;
X is an element selected from the group consisting of O and S;
M is an element selected from the group consisting of Ce and Tb;
said luminous substance pigments having grain sizes≦
20 μ
m and a mean grain diameter d50 ≦
5 μ
m.
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Abstract
The wavelength-converting casting composition is based on a transparent epoxy casting resin with a luminous substance admixed. The composition is used in an electroluminescent component having a body that emits ultraviolet, blue or green light. An inorganic luminous substance pigment powder with luminous substance pigments is dispersed in the transparent epoxy casting resin. The luminous substance is a phosphorous group of the general formula A3 B5 X12 :M, and the luminous substance pigments have particle sizes<20 μm and a mean grain diameter d50 <5 μm.
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Citations
14 Claims
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1. A wavelength-converting casting composition, for converting a wavelength of ultraviolet, blue or green light emitted by an electroluminescent component, comprising:
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a transparent epoxy casting resin; an inorganic luminous substance pigment powder dispersed in said transparent epoxy resin, said pigment powder comprising luminous substance pigments from a phosphorus group having the general formula A3 B5 X12 ;
M, where A is an element selected from the group consisting of Y, Ca, Sr;
B is an element selected from the group consisting of Al, Ga, Si;
X is an element selected from the group consisting of O and S;
M is an element selected from the group consisting of Ce and Tb;said luminous substance pigments having grain sizes≦
20 μ
m and a mean grain diameter d50 ≦
5 μ
m. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A light-emitting semiconductor component, comprising:
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a semiconductor body formed of a semiconductor layer sequence and being capable, during an operation of the semiconductor component, of emitting electromagnetic radiation in at least one of an ultraviolet, blue, and green spectral range; a wavelength-converting casting composition disposed in a vicinity of said semiconductor body, said casting composition being formed of a transparent epoxy casting resin and an inorganic luminous substance pigment powder dispersed in said transparent epoxy resin, said pigment powder comprising luminous substance pigments from a phosphorus group having the general formula A3 B5 X12 ;
M, where A is an element selected from the group consisting of Y, Ca, Sr;
B is an element selected from the group consisting of Al, Ga, Si;
X is an element selected from the group consisting of O and S;
M is an element selected from the group consisting of Ce and Tb, and having grain sizes≦
20 μ
m and a mean grain diameter d50 ≦
5 μ
m;said luminous substance pigments converting a portion of the radiation originating from the ultraviolet, blue and green spectral range into radiation of a higher wavelength, such that the semiconductor component emits mixed radiation including the higher-wavelength radiation and radiation from at least one of the ultraviolet, blue and green spectral range. - View Dependent Claims (11, 12, 13, 14)
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Specification