Optical apparatus

Optics: image projectors – Temperature control – Blower

Reexamination Certificate

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Details

C353S057000, C353S060000, C353S031000

Reexamination Certificate

active

07021768

ABSTRACT:
A projection type display apparatus including a discharge lamp for supplying light, a light valve device and first and second air intake openings arranged on different sides of the apparatus. A centrifugal fan is associated with the first air intake opening so as to draw in outside air and form a first ventilation air flow from the first air intake opening through a lower side of the light valve device so as to cool the light valve device. A fan is associated with the second air intake opening so as to draw in outside air and form a second ventilation air flow so as to cool optical elements including lenses. An exhaust opening is arranged on a further side of the apparatus, and an exhaust is fan arranged proximate to a discharge lamp so as to draw out air including the first and second ventilation air flow therethrough.

REFERENCES:
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patent: 5860719 (1999-01-01), Suzuki
patent: 5951136 (1999-09-01), Furuhata et al.
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patent: 6471357 (2002-10-01), Hara
patent: 6540364 (2003-04-01), Takizawa
patent: 6783245 (2004-08-01), Konuma et al.
patent: 5-053200 (1993-03-01), None
patent: 5-105-115 (1993-04-01), None
patent: 6-148594 (1994-05-01), None
patent: 9-049998 (1997-02-01), None
patent: 9-133911 (1997-05-01), None

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