Claims
- 1. A wavelength-converting casting composition, comprising:
a transparent casting resin; an inorganic luminous substance pigment powder dispersed in said transparent casting resin, said pigment powder comprising 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; and said luminous substance pigments having grain sizes≦20 μm and a mean grain diameter d50<5 μm.
- 2. The casting composition according to claim 1, wherein said luminous substance pigments are substantially spherical particles.
- 3. The casting composition according to claim 1, wherein said luminous substance pigments are flakelike particles.
- 4. The casting composition according to claim 1, wherein the mean grain diameter d50 of said luminous substance pigments is between one and two micrometers.
- 5. The casting composition according to claim 1, which comprises the following components:
a) epoxy casting resin≧60% by weight; b) luminous substance pigments>0 and ≦25% by weight; c) thixotropic agent>0 and ≦10% by weight; d) mineral diffusor>0 and ≦10% by weight; e) processing adjuvant>0 and ≦3% by weight; f) hydrophobic agent>0 and ≦3% by weight; and g) adhesion promoters>0 and ≦2% by weight.
- 6. The casting composition according to claim 1, wherein said luminous substance pigments are Ce-doped garnets.
- 7. The casting composition according to claim 1, wherein said luminous substance pigments are YAG:Ce based particles.
- 8. The casting composition according to claim 1, which comprises a content of iron≦20 ppm.
- 9. The casting composition according to claim 1, wherein said luminous substance pigments are formed with a silicon coating.
- 10. The casting composition according to claim 1, wherein said luminous substance pigment powder and said casting resin are adjusted to convert a wavelength of ultraviolet, blue, or green light into a relatively longer wavelength.
- 11. The casting composition according to claim 1, wherein said luminous substance pigments are formed of a material 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 O; M is at least one element selected from the group consisting of Ce, Eu, Cr, Nd, Er, and Tb.
- 12. The casting composition according to claim 1, which comprises light-scattering particles added to said casting resin.
- 13. A light-emitting semiconductor component, comprising:
a semiconductor body formed of a semiconductor layer sequence and being capable; during an operation of the semiconductor component, of emitting electromagnetic radiation in a first spectral range selected from ultraviolet, blue, and green; a wavelength-converting casting composition disposed in a vicinity of said semiconductor body and formed of a transparent casting resin and an inorganic luminous substance pigment powder dispersed in said transparent casting resin; said pigment powder comprising 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; and said luminous substance pigments having grain sizes≦20 μm and a mean grain diameter d50≦5 μm and converting a portion of the radiation originating from said semiconductor component into radiation of a higher wavelength, such that the semiconductor component emits mixed radiation including the higher-wavelength radiation and radiation from the first spectral range.
- 14. The light-emitting semiconductor component according to claim 13, wherein said casting composition encloses at least a part of said semiconductor body.
- 15. The light-emitting semiconductor component according to claim 13, wherein said semiconductor body is adapted to emit radiation in a blue spectral range having a maximum luminescence intensity at λ=430 nm or at λ=450 nm.
- 16. The light-emitting semiconductor component according to claim 13, which further comprises an opaque base housing having a recess formed therein, said semiconductor body being disposed in said recess and said recess being at least partially filled with said casting composition.
- 17. The light-emitting semiconductor component according to claim 13, wherein said casting composition is provided with various kinds of luminous substance pigments in respect to a host lattice distribution and a type and extent of doping.
- 18. The light-emitting semiconductor component according to claim 13, wherein said semiconductor body is a blue light emitting semiconductor body, and said luminous substance pigments are Ce-doped phosphors adapted to shift some of the blue light emitted by said semiconductor body into a yellow spectral range, whereby the semiconductor component emits white light.
- 19. The light-emitting semiconductor component according to claim 13, wherein said semiconductor body is a blue light emitting semiconductor body, and said luminous substance pigments shift some of the blue light emitted by said semiconductor body into a green and red spectral range, whereby the semiconductor component emits white light.
- 20. The light-emitting semiconductor component according to claim 13, wherein said pigment are formed of a material 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 O; M is at least one element selected from the group consisting of Ce, Eu, Cr, Nd, Er, and Tb.
- 21. The light-emitting semiconductor component according to claim 13, wherein the mean grain diameter d50 of said luminous substance pigments is between one and two micrometers.
- 22. The light-emitting semiconductor component according to claim 13, which comprises light-scattering particles added to said casting resin.
- 23. The light-emitting semiconductor component according to claim 13, wherein said luminous substance pigment powder is a tempered pigment powder.
Priority Claims (1)
Number |
Date |
Country |
Kind |
196 38 667.5 |
Sep 1996 |
DE |
|
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This is a division of copending application Ser. No. 09/536,564, filed Mar. 28, 2000, which is a division of application Ser. No. 09/082,205, filed May 20, 1998, now U.S. Pat. No. 6,066,861, which was a continuation of international application PCT/DE97/02139, filed Sep. 22, 1997, which designated the United States.
Divisions (2)
|
Number |
Date |
Country |
Parent |
09536564 |
Mar 2000 |
US |
Child |
10623819 |
Jul 2003 |
US |
Parent |
09082205 |
May 1998 |
US |
Child |
09536564 |
Mar 2000 |
US |
Continuations (1)
|
Number |
Date |
Country |
Parent |
PCT/DE97/02139 |
Sep 1997 |
US |
Child |
09082205 |
May 1998 |
US |