Projection display device in which position of the light...

Details Projection display device in which position of the light... Projection display device in which position of the light...

2011-04-05

2011-04-05

Epps, Georgia Y (Department: 2878)

Optics: image projectors

Composite projected image

Multicolor picture

C353S057000, C353S033000, C353S081000, C353S079000, C353S037000, C353S099000, C348S751000, C348S790000, C385S133000, C359S434000

Reexamination Certificate

active

07918561

ABSTRACT:
An optical system (light guiding optical system) for guiding G-light and R-light to liquid crystal panels is protruded in an opposite direction from projection optical system with regard to an optical axis of a light source. A space is created between an optical engine and a wall surface, and air stream for suction fan is thus secured. A distance (H1) between the optical engine and the wall surface can be reduced to, for example, a thickness of an external housing of the projector. Since a unit comprising the light source and a suction fan is retracted in a direction of the projection optical system than a protruded portion of the light guiding optical system, a distance (H2) from an end edge of the optical engine to a projection light emitting position can be reduced.

REFERENCES:
patent: 7066610 (2006-06-01), Yamada et al.
patent: 2005/0162617 (2005-07-01), Koo
patent: 2004-258620 (2004-09-01), None

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