Light source device and projector utilizing the same
First Claim
Patent Images
1. A light source device, comprising:
- a light source lamp; and
a reflector that reflects light emitted from the light source lamp, wherein the reflector is formed of a ceramic having a thermal conductivity of at least about 0.005 (cal/cm·
sec·
deg) at a temperature of 20°
C., wherein the ceramic is composed of a material selected from the group consisting of Al2O3, 2MgO·
SiO2, ZrO2·
SiO2, TiO2, SiC, Si3N4, ZrO2, and cermet.
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Abstract
A light source device of the present invention includes a light source lamp and a reflector that reflects light emitted from the light source lamp. The reflector is formed of a ceramic having a thermal conductivity of at least about 0.005 (cal/cm·sec·deg) at a temperature of 20° C. This arrangement of the light source device effectively lowers the ambient temperature of the light source lamp.
14 Citations
29 Claims
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1. A light source device, comprising:
-
a light source lamp; and
a reflector that reflects light emitted from the light source lamp, wherein the reflector is formed of a ceramic having a thermal conductivity of at least about 0.005 (cal/cm·
sec·
deg) at a temperature of 20°
C., wherein the ceramic is composed of a material selected from the group consisting of Al2O3, 2MgO·
SiO2, ZrO2·
SiO2, TiO2, SiC, Si3N4, ZrO2, and cermet.- View Dependent Claims (2, 3, 4, 5, 6, 14, 15, 16, 17, 18, 19, 20, 21, 22)
a transmissive front panel fitted in an opening of the reflector.
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5. A fight source device in accordance with claim 1, further comprising:
a cooling device that forcibly cools down the reflector.
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6. A light source device in accordance with claim 1, further comprising:
a power source that activates the light source lamp.
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14. A light source device in accordance with claim 1, wherein the material is Al2O3.
-
15. A light source device in accordance with claim 1, wherein the material is 2MgO·
- SiO2.
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16. A light source device in accordance with claim 1, wherein the material is MgO·
- SiO2.
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17. A light source device in accordance with claim 1, wherein the material is ZrO2·
- SiO2.
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18. A light source device in accordance with claim 1, wherein the material is TiO2.
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19. A light source device in accordance with claim 1, wherein the material is SiC.
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20. A light source device in accordance with claim 1, wherein the material is Si3N4.
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21. A light source device in accordance with claim 1, wherein the material is ZrO2.
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22. A light source device in accordance with claim 1, wherein the material is cermet.
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7. A projector, comprising:
-
an illuminating optical system including a light source device;
an electrooptic device that modulates light emitted from the illuminating optical system in response to image information; and
a projection optical system that projects a modulated light obtained by the electrooptic device, the light source device comprising;
a light source lamp; and
a reflector that reflects light emitted from the light source lamp, wherein the reflector is formed of a ceramic having a thermal conductivity of at least about 0.005 (cal/cm·
sec deg) at a temperature of 20°
C., wherein the ceramic is composed of a material selected from the group consisting of Al2O3, 2MgO·
SiO2, MgO·
SiO2, ZrO2·
SiO2, TiO2, SiC, Si3N4, ZrO2, and cermet.- View Dependent Claims (8, 9, 10, 11, 12, 13, 23, 24, 25, 26, 27, 28, 29)
a transmissive front panel fitted in an opening of the reflector.
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11. A projector in accordance with claim 7, further comprising:
a cooling device that forcibly cools down the reflector.
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12. A projector in accordance with claim 7, further comprising:
a power source that activates the light source lamp.
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13. A projector in accordance with claim 7, further comprising:
a driving section that supplies the image information to drive the electrooptic device.
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23. A projector in accordance with claim 7, wherein the material is Al2O3.
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24. A projector in accordance with claim 7, wherein the material is 2MgO·
- SiO2.
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25. A projector in accordance with claim 7, wherein the material is MgO·
- SiO2.
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26. A projector in accordance with claim 7, wherein the material is ZrO2·
- SiO2.
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27. A projector in accordance with claim 7, wherein the material is TiO2.
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28. A projector in accordance with claim 7, wherein the material is ZrO2.
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29. A projector in accordance with claim 7, wherein the material is cermet.
Specification
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Current AssigneeSeiko Epson Corporation (Seiko Group)
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Original AssigneeSeiko Epson Corporation (Seiko Group)
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InventorsTakezawa, Takeshi
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Primary Examiner(s)O'Shea, Sandra
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Assistant Examiner(s)Alavi, Ali
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Application NumberUS09/691,032Time in Patent Office1,419 DaysField of Search362/294, 362/264, 362/345, 362/310, 313/112, 313/113US Class Current362/345CPC Class CodesF21V 29/505 of reflectorsF21V 29/67 characterised by the arrang...F21V 7/24 characterised by the materialF21V 7/28 characterised by coatingsG03B 21/2026 Gas discharge type light so...
