Rear projection screen and diffusing sheet

Details Rear projection screen and diffusing sheet Rear projection screen and diffusing sheet

2007-01-02

2007-01-02

Perkey, W. B. (Department: 2851)

Optical: systems and elements

Projection screen

Unitary sheet comprising plural refracting areas

C359S453000, C359S460000, C359S742000

Reexamination Certificate

active

10892485

ABSTRACT:
Provided herein is a rear projection screen capable of displaying a sharper image by reducing deterioration in the image quality, such as coarsening, flickering and glaring. A rear projection screen10comprises a Fresnel lens sheet11having, on its light-entering-side surface, a Fresnel lens part11ain the shape of a Fresnel lens. In the Fresnel lens sheet11, both the Fresnel lens part11aand a part (diffusing part11b) situated on the light-emerging side of the Fresnel lens part11acomprise light-diffusing particles P. The mean particle diameter of the light-diffusing particles P contained in the diffusing part11bis not more than⅕of the lens pitch of the Fresnel lens part11a.

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patent: 11-133508 (1999-05-01), None

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