Liquid crystal cells – elements and systems – Liquid crystal system – Projector including liquid crystal cell
Reexamination Certificate
2006-10-24
2006-10-24
Schechter, Andrew (Department: 2871)
Liquid crystal cells, elements and systems
Liquid crystal system
Projector including liquid crystal cell
C349S009000, C349S010000, C359S232000
Reexamination Certificate
active
07126648
ABSTRACT:
Heat generation is inhibited in a polarized light generating optics system in a projector.A liquid crystal projector includes: lens arrays140, 150that generate partial light beams from a light beam emitted from a light source; and a polarized light generating optics system160that generates polarized light, which is to be supplied to liquid crystal light valves, from the partial light beams. The polarized light generating optics system160separates s-polarized light and p-polarized light by polarization separating films64a. The s-polarized light is reflected from reflecting films64band is emitted directly. The p-polarized light is converted into s-polarized light by a selective phase difference plate66and is emitted therefrom. The polarized light generating optics system160is equipped with light shielding surfaces62bthat shield light from entering into the reflecting films64b. The lens arrays140, 150are also equipped with light shielding members143, 153that act similarly as the light shielding surfaces. Disposing the light shielding members143, 153can inhibit heat generation on the light shielding surfaces62b.
REFERENCES:
patent: 2001/0015775 (2001-08-01), Yamamoto et al.
patent: A 10-274751 (1998-10-01), None
patent: A 2002-72361 (2002-03-01), None
Fuse Makoto
Ushiyama Tomiyoshi
Chen W. Patty
Schechter Andrew
Seiko Epson Corporation
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