Projection screen and projection system comprising the same

Details Projection screen and projection system comprising the same Projection screen and projection system comprising the same

2006-10-17

2006-10-17

Perkey, W. B. (Department: 2851)

Optical: systems and elements

Projection screen

Unitary sheet comprising plural reflecting areas

C359S449000, C359S454000, C359S506000, C359S492010, C349S087000, C349S096000, C349S115000, C349S176000, C349S185000

Reexamination Certificate

active

07123410

ABSTRACT:
A projection screen includes a polarized-light selective reflection layer having a cholesteric liquid crystalline structure, capable of selectively reflecting a specific polarized-light component; and a substrate that supports the polarized-light selective reflection layer. In the cholesteric liquid crystalline structure of the polarized-light selective reflection layer, the helical pitch on the side farther from the imaging-light-incident side is longer than that on the side closer to the imaging-light-incident side.

REFERENCES:
patent: 5486884 (1996-01-01), De Vaan
patent: 6025899 (2000-02-01), Fukunaga et al.
patent: 6061108 (2000-05-01), Anderson et al.
patent: 6175400 (2001-01-01), Duncan et al.
patent: 6381068 (2002-04-01), Harada et al.
patent: 2003/0038918 (2003-02-01), Kashima et al.

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