Optical equipment with at least first and second ventilation...

Details Optical equipment with at least first and second ventilation... Optical equipment with at least first and second ventilation...

2008-10-17

2010-11-16

Epps, Georgia Y (Department: 2878)

Optics: image projectors

Temperature control

Blower

C353S060000, C353S061000, C353S119000, C348S748000, C349S058000, C349S161000

Reexamination Certificate

active

07832871

ABSTRACT:
A projection type display apparatus includes a housing having a first side on which an air intake opening is arranged and a second side on which an air exhaust opening is arranged, a light source for supplying light, and a light valve device which modulates the light output from the light source. A first fan is provided which draws air from the air intake opening into the housing, and a first ventilation path is coupled with the air intake opening so as to lead air flow from the air intake opening toward a lower portion of the light valve. A second ventilation path is formed from the lower portion of the light valve to an upper portion of the light valve, and a second fan is provided which draws out air flowing from the second ventilation path through the air exhaust opening to outside of the housing.

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