Projection type video display apparatus

Details Projection type video display apparatus Projection type video display apparatus

2007-05-22

2007-05-22

Perkey, W. B. (Department: 2851)

Optics: image projectors

Composite projected image

Multicolor picture

C353S037000, C353S060000, C353S061000, C353S084000, C353S094000, C353S099000, C353S102000, C348S748000, C348S750000, C348S757000, C348S759000, C362S555000, C362S560000, C362S561000, C362S231000, C362S345000, C349S007000, C349S161000, C359S034000, C359S629000, C385S133000

Reexamination Certificate

active

11040730

ABSTRACT:
An object of the invention is to achieve a high intensity, a compact structure, a cost reduction and a heat radiation of a liquid crystal panel, in a projection type video display apparatus employing a combination of LED light sources and a light pipe. The light pipe is formed in a hollow type so as to be utilized as a cooling wind path. Further, a permeable or reflective baffle plate is provided within the light pipe. Further, the light pipe is formed by coating a mirror on an inner surface of an optical case integrally formed by fixing optical parts. Further, a dichroic mirror is arranged in an LED light source outgoing surface.

REFERENCES:
patent: 7004586 (2006-02-01), Morinaga
patent: 2003/0098956 (2003-05-01), Chang et al.
patent: 2003/0231497 (2003-12-01), Sakata et al.
patent: 2004/0057027 (2004-03-01), Tani
patent: 2006/0044523 (2006-03-01), Teijido et al.
patent: 2003-329978 (2003-11-01), None

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