| US 7,594,739 B2 | ||
| Light source device and projection-type image display device | ||
| Hirokazu Taguchi, Tokyo (Japan); Yoshinori Kakuta, Tokyo (Japan); and Kimito Nishikawa, Tokyo (Japan) | ||
| Assigned to Mitsubishi Denki Kabushiki Kaisha, Tokyo (Japan) | ||
| Filed on Nov. 03, 2005, as Appl. No. 11/265,081. | ||
| Claims priority of application No. 2005-074339 (JP), filed on Mar. 16, 2005. | ||
| Prior Publication US 2006/0209543 A1, Sep. 21, 2006 | ||
| Int. Cl. B60Q 1/06 (2006.01); F21V 29/00 (2006.01) | ||
| U.S. Cl. 362—373 [362/261; 362/264; 362/294; 362/345] | 7 Claims |
| 1. A light source device comprising:
a discharge lamp;
a reflection mirror that reflects a light from said discharge lamp and emits said light, said reflection mirror having an
inner reflection surface and an outer back surface opposite to said inner reflection surface;
a transparent plate disposed on a light emitting side of said reflection mirror, said transparent plate and said reflection
mirror being configured to surround a space, where said reflection mirror has an inlet opening and an outlet opening, both
of which being located in the vicinity of an end of said reflection mirror closer to said transparent plate;
a case that houses said discharge lamp, said reflection mirror and said transparent plate, said case having an inlet opening
formed on a rear side of said case and an outlet opening formed on a front wall of said case, said front wall being disposed
on the light emitting side of said reflection mirror and said outlet opening directly opening to the outside of said case;
and
a conduit provided so as to connect said outlet opening of said reflection mirror and said outlet opening of said case;
wherein air flows from said inlet opening of said case, toward said front wall of said case along said outer back surface
of said reflection mirror, through said inlet opening of said reflection mirror into said space, out of said space through
said outlet opening of said reflection mirror, through said conduit, and through said outlet opening formed on the front wall
of said case directly to the outside of said case.
|