Projection screen and projection system containing same

Details Projection screen and projection system containing same Projection screen and projection system containing same

2006-11-28

2006-11-28

Perkey, W. B. (Department: 2851)

Optical: systems and elements

Projection screen

C359S454000, C359S459000, C359S506000, C359S492010, C359S452000, C359S599000

Reexamination Certificate

active

07142360

ABSTRACT:
A projection screen capable of sharply displaying an image even under bright environmental light with high image visibility. A projection screen has a polarized-light selective reflection layer with a cholesteric liquid crystalline structure, capable of selectively reflecting a specific polarized light component, and a substrate for supporting the reflection layer. Of the light entering the reflection layer from the viewer's side, the right-handed light in the selective reflection wave range is reflected from the reflection layer as reflected light. As a result of structural non-uniformity in the cholesteric liquid crystalline structure, the light that is selectively reflected (reflected light) is diffused.

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Shiozawa, Akihito et al. “Optical Properties of Diffusion-Type Cholesteric Piquid Crystalline Polymer Film.”Mol. Cryst. And liq. Cryst., 2001, vol. 364, pp. 469-478.

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