Optics: image projectors – Temperature control – Blower
Patent
1997-09-10
1999-11-30
Dowling, William
Optics: image projectors
Temperature control
Blower
353119, G03B 2116
Patent
active
059930080
ABSTRACT:
A front liquid crystal display projector includes a housing having an exhaust port and a projection opening, an optical block, installed in the housing, having a light source, a reflection mirror, a light separator, an image display unit using liquid crystal, an image combining unit, a projection lens, and an exhaust fan installed between the light source and the exhaust port. The reflection mirror changes the direction of the light from the light source, and the projection lens and the light source are disposed parallel to each other. The exhaust port and the projection opening are provided at a first side of the housing. An image formed by the optical block is projected from the first side and from the projection opening, and air in the housing is discharged from the exhaust port and also from the first side. In addition, the exhaust port prevents stray light from the light source, which exits the exhaust port, from overlapping the image projected from the projection opening.
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European Search Report for Int'l Appln No. EP 97 11 3837 dated Jul. 6, 1999 .
Aono Shozo
Hashimukai Masanari
Hoshino Makoto
Okada Takehiro
Dowling William
Matsushita Electric - Industrial Co., Ltd.
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