Projection type video display

Details Projection type video display Projection type video display

2006-06-06

2006-06-06

Perkey, W. B. (Department: 2851)

Optics: image projectors

Shutter

C353S091000, C353S093000, C353S097000, C353S102000, C362S321000, C362S324000, C359S578000, C349S007000

Reexamination Certificate

active

07055965

ABSTRACT:
A shutter device comprises a plurality of shutters. Each of the shutters is provided at a position in the vicinity of a fly's eye lens positioned on the side of a polarization conversion system (one of fly's eye lenses in an integrator lens) and not preventing the passage of effective illuminating light. Each of the shutters is constructed as a first shutter or a second shutter. The first shutter is constructed so as to block an upper one-third region and a lower one-third region of the fly's eye lens, and the second shutter is constructed so as to block an intermediate one-third region of the fly's eye lens

REFERENCES:
patent: 2001/0015775 (2001-08-01), Yamamoto et al.
patent: 2003/0086265 (2003-05-01), Ilsaka et al.
patent: 2002-365607 (2002-12-01), None

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