Transparent rear projection screen

Details Transparent rear projection screen Transparent rear projection screen

1985-11-26

1987-01-13

Wintercorn, Richard A.

G03B 2160

Patent

active

046360352

ABSTRACT:
A rear projection screen consists of a Fresnel lens and a picture-forming screen placed in front of it. The picture-forming screen has vertical backward convex lenses on its back and vertical masking strips on its front and strip-shaped sections situated between the masking strips and opposite the backward convex lenses. Each of these is designed to refract light rays coming from behind so that they are directed towards the strip-shaped sections. In order to increase the picture resolution or definition capability of the screen and to avoid notch sensitivity between the backward convex lenses an intermediate lens is provided between every two of the backward convex lenses. Every intermediate lens has two sides shaped in such a way that the rays which hit one side of each intermediate lens are refracted so that they are directed towards the strip-shaped section which is situated opposite to the backward convex lens which is adjacent to the other side of the intermediate lens concerned, and that the rays which hit the other side of the intermediate lens concerned are refracted so that they are directed towards the strip-shaped section with is situated opposite to the backward convex lens which is adjacent to said one side of the intermediate lens concerned.

REFERENCES:
patent: 4152047 (1979-05-01), Inoue
patent: 4536056 (1985-08-01), Oguino
patent: 4548469 (1985-10-01), Inoue et al.
patent: 4561720 (1985-12-01), Clausen et al.

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