Light source device and projector
AssigneeSeiko Epson Corporation
InventorsMotoyuki Fujimori, Takeshi Takezawa, Hiroyuki Meguro, Masakazu Kitamura
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Abstract
A light source lamp unit (10) includes a light source lamp (11), an ellipsoidal reflector (12) and a plate body (19). The plate body (19) is provided behind the reflector (12) with a gap kept therebetween, which has a shape corresponding to the profile of a reflecting portion (122) of the reflector (12). A cooling channel for passing a cooling air is formed between the plate body (19) and the reflector (12). The width of the cooling channel in a direction along an optical axis of the light source lamp (11) is minimized at a part near a neck portion (121) of the reflecting portion (122) and enlarged toward the peripheral edge of the reflecting portion (122) of the reflector (12).
Claims20
A light source device, comprising:
- a light-emitting tube including a light-emitting portion that generates light by an electric discharge between electrodes and sealing portions provided on both sides of the light-emitting portion;
- a reflector provided behind the light-emitting portion of the light-emitting tube and having a reflecting portion that irradiates the light beam irradiated by the light-emitting tube after aligning in a predetermined direction,
- wherein the reflecting portion of the reflector reflects visible lights and transmits infrared rays and ultraviolet rays in the light beam irradiated by the light-emitting portion of the light-emitting tube,
- wherein a plate body is provided behind the reflector spaced apart from the reflecting portion of the reflector with a predetermined gap, the plate body having a shape corresponding to the profile of the reflection portion of the reflector and absorbing the infrared rays and the ultraviolet rays transmitted through the reflecting portion,
- wherein a cooling channel that passes a cooling fluid is formed between the reflecting portion of the reflector and the plate body, and
- wherein the surface emissivity of the surface of the plate body is 0.8 or above on a side near the reflector.
A light source device, comprising:
- a light-emitting tube including a light-emitting portion that generates light by an electric discharge between electrodes and sealing portions provided on both sides of the light-emitting portion;
- a reflector provided behind the light-emitting portion of the light-emitting tube and having a reflecting portion that irradiates the light beam irradiated by the light-emitting tube after aligning in a predetermined direction,
- wherein the reflecting portion of the reflector reflects visible lights and transmits infrared rays and ultraviolet rays in the light beam irradiated by the light-emitting portion of the light-emitting tube,
- wherein a plate body having a shape corresponding to the profile of the reflecting portion of the reflector is provided behind the reflector with the outer circumference thereof being spaced apart from the reflecting portion of the reflector with a predetermined gap, the plate body being independent of the reflector and absorbing the infrared rays and the ultraviolet rays transmitted through the reflecting portion,
- wherein a cooling channel that passes a cooling fluid is formed between the reflecting portion of the reflector and the plate body,
- wherein in the sealing portions of the light-emitting tube, the one sealing portion provided on the side near the reflector is fixed on the reflector via a cylindrical heat-conductive member with one end extending behind the reflector, and
- wherein the plate body is made of a heat-conductive material and is abutted on an end of the heat-conductive member.
Dependencies are inferred from the claim text.