Optics: image projectors – Temperature control – Blower
Reexamination Certificate
2006-04-04
2006-04-04
Perkey, W. B. (Department: 2851)
Optics: image projectors
Temperature control
Blower
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.
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Fuse Kenji
Ikeda Hidehiro
Kaku Nobuyuki
Otsuka Yasuo
Shiraishi Mikio
Antonelli, Terry Stout and Kraus, LLP.
Cruz Magda
Hitachi , Ltd.
Perkey W. B.
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