WAVELENGTH-CONVERTING CASTING COMPOSITION AND LIGHT-EMITTING SEMICONDUCTOR COMPONENT
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Accused Products
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 powder of Ce-doped phosphors and the luminous substance pigments have particle sizes ≦20 μm and a mean grain diameter d50 ≦5 μm.
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Citations
35 Claims
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1-16. -16. (canceled)
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17. Apparatus comprising:
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a semiconductor body configured to emit electromagnetic radiation in a first wavelength range; and
a wavelength-converting casting composition positioned to receive the electromagnetic radiation from the semiconductor body and configured to convert some of the electromagnetic radiation from the first wavelength range to a second wavelength range, wherein the casting composition comprises luminous substance pigments selected from the group consisting of garnets doped with rare earths;
thiogallates doped with rare earths;
aluminates doped with rare earths; and
orthosilicates doped with rare earths, andwherein the luminous substance pigments having grain sizes ≦
20 μ
m and a median diameter ≦
5 μ
m, wherein 50% of the pigments have a grain diameter greater than said median diameter and 50% of the pigments have a grain diameter less than said median diameter. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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Specification