Projection type display unit

Details Projection type display unit Projection type display unit

2008-04-29

2008-04-29

Tso, Laura (Department: 2875)

Illumination

Housing

With cooling means

C362S294000, C353S058000

Reexamination Certificate

active

07364327

ABSTRACT:
Reduction of noise is achieved by devising an arrangement of heat generating parts such as a light valve element, an electric power source, a light source, etc. and an arrangement of cooling fans. In cooling the light source, the electric power source and liquid crystal panels, a cooling wind path for the liquid crystal panels and the electric power source is made separate from and independent of a cooling wind path for the light source that generates much heat, a cooling air volume is optimized for the respective cooling wind paths, and noise accompanying the rotation of the cooling fans is reduced. Also, by arranging the cooling fans substantially centrally of the respective cooling wind paths, that volume of noise, which leaks from air intake ports and air exhaust port that are opened to a housing of a unit, is reduced.

REFERENCES:
patent: 6540364 (2003-04-01), Takizawa et al.
patent: 6582082 (2003-06-01), Tiao et al.
patent: 7252416 (2007-08-01), Katayama et al.
patent: 2002/0015138 (2002-02-01), Ito et al.
patent: 10-233983 (1998-09-01), None
patent: 2000-81673 (2000-03-01), None
patent: 2002-122839 (2002-04-01), None
patent: 2002-258248 (2002-09-01), None
patent: 2002-373524 (2002-12-01), None
Chinese Office Action, with English Translation, issued in Chinese Patent Application No. 2004100310235, dated on Aug. 3, 2007.

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