projector

Details projector projector

2006-01-17

2006-01-17

Perkey, W. B. (Department: 2851)

Optics: image projectors

Temperature control

Blower

C353S058000, C353S060000, C353S119000, C349S008000, C349S161000, C348S748000

Reexamination Certificate

active

06986582

ABSTRACT:
An aspect of the invention provides a duct capable of cooling optical modulation systems with high efficiency while realizing miniaturization and reduction of the mounted number of cooling fans. The duct can be used for a projector including plural optical modulation systems, a dichroic prism, and a projection lens, and the respective optical modulation systems include liquid crystal panels, entrance side polarization plates, viewing angle correction plates, and exit side polarization plates. The duct can have plural air guide paths through which cooling air passes, a discharge opening, entrance side discharge openings, and exit side discharge openings formed in these air guide paths. With the optical modulation systems as targets of independent cooling, the entrance side discharge openings and the exit side discharge openings with respect to the targets of independent cooling are formed in different air guide paths.

REFERENCES:
patent: 6334686 (2002-01-01), Shiraishi et al.
patent: 2001/0019397 (2001-09-01), Shiraishi et al.
patent: A 11-295814 (1999-10-01), None

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