Projection display apparatus

Details Projection display apparatus Projection display apparatus

2011-08-09

2011-08-09

Epps, Georgia Y (Department: 2878)

Optics: image projectors

Light shield, mask, hood, or diaphragm

C353S084000, C353S085000, C353S086000, C353S088000, C353S089000, C353S090000, C353S091000, C353S092000, C353S093000, C353S094000, C353S098000, C353S038000, C359S233000, C359S738000, C359S739000, C359S740000, C359S234000, C359S619000, C359S620000, C359S621000, C359S622000, C359S623000, C348S751000, C348S752000, C348S753000, C348S754000, C348S755000, C348S756000, C348S757000, C348S362000, C348S086000, C362S330000, C362S333000, C362S336000, C349S018000, C349S057000, C349S058000, C349S096000, C349S097000, C349S

Reexamination Certificate

active

07993017

ABSTRACT:
A projection display apparatus101in which the light quantity adjusting means has a simple and readily interchangeable structure, and which can improve image quality by adjusting the quantity of light received by a light valve continuously, without causing illuminance irregularities, and without having unwanted light radiated onto the screen, the light quantity adjusting means9having light blocking members91L,91R for blocking light in transit to a second lens array22, and rotational axes91LA,91RA for turnably supporting each of the light blocking members on an xy plane, the light blocking members91L,91R and rotational axes91LA,91RA being positioned so that the rotational axes91LA,91RA are disposed in positions symmetric with respect to the optical axis AX on the xy plane, and the turning range from the light blocking initiation position at which the light blocking members91L,91R, by being turned, start to block light in transit toward the second lens array22to the maximum light blocking position at which the light blocking members91L,91R block a maximum quantity of the light in transit toward the second lens array22is equal to or less than ninety degrees.

REFERENCES:
patent: 6769777 (2004-08-01), Dubin et al.
patent: 6877865 (2005-04-01), English et al.
patent: 2003/0086265 (2003-05-01), Ilsaka et al.
patent: 2004/0263697 (2004-12-01), Fuse et al.
patent: 2006/0077283 (2006-04-01), Sasazaki et al.
patent: 2007/0195288 (2007-08-01), Ahn
patent: 61-121429 (1986-07-01), None
patent: 2001-174910 (2001-06-01), None
patent: 2003-241311 (2003-08-01), None
patent: 2005-31103 (2005-02-01), None
patent: 2006-133750 (2006-05-01), None
patent: WO-03/032080 (2003-04-01), None
patent: WO-2005/026835 (2005-03-01), None

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