| US 7,513,626 B2 | ||
| Light source device and projection video display device having the same | ||
| Takaharu Adachi, Daito (Japan); Tadashi Renbutsu, Kasai (Japan); and Shoji Okazaki, Higashiosaka (Japan) | ||
| Assigned to Sanyo Electric Co., Ltd., Moriguchi-shi (Japan) | ||
| Filed on Dec. 23, 2005, as Appl. No. 11/315,588. | ||
| Claims priority of application No. 2004-372703 (JP), filed on Dec. 24, 2004. | ||
| Prior Publication US 2006/0164843 A1, Jul. 27, 2006 | ||
| Int. Cl. G03B 21/16 (2006.01); G03B 21/28 (2006.01); F21V 7/20 (2006.01); F21V 29/00 (2006.01) | ||
| U.S. Cl. 353—60 [353/61; 353/98; 362/218; 362/294; 362/345; 362/373] | 4 Claims |
| 1. A light source device comprising:
a light emitter;
a reflector covering the light emitter; and
a supporting member for holding the reflector,
passages of cooling air being formed above and below the reflector,
wherein the passages of cooling air include first and second openings that are opened in upper and lower portions, respectively,
of the reflector, a wind direction switching member is disposed swingably on the supporting member in a plane almost orthogonal
to an optical axis L of the light emitter near the second opening in the lower portion of the reflector, and
the wind direction switching member has a switching function of making cooling air from the second opening flow upward to
a side of the light emitter in a state where the supporting member is placed on a desk, and making the cooling air flow directly
to an upper portion of the light emitter via the second opening in a state where the supporting member is hung from a ceiling.
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