Rear projection screen with double sheet

Details Rear projection screen with double sheet Rear projection screen with double sheet

1990-10-24

1991-11-12

Wintercorn, Richard A.

Optical: systems and elements

Projection screen

Unitary sheet comprising plural refracting areas

G03B 2160

Patent

active

050642731

ABSTRACT:
A rear projection screen comprises a first sheet formed with a Fresnel lens and vertical lenticular lenses on both surfaces of a first transparent sheet made of synthetic resin, and a second sheet formed with a horizontal grating on one surface of a second transparent sheet made of synthetic resin and also formed with a horizontal grating or fine mat surface layer and simultaneously a black striped layer on the other surface thereof so that they are assembled so as to be faced each other, whereby whole screen brightness and screen brightness uniformity as well as contrast are improved and can be advantageously used for the screen for three dimensional projectors.

REFERENCES:
patent: 4054907 (1977-10-01), Itoh et al.
patent: 4147408 (1979-04-01), Plummer
patent: 4452509 (1984-06-01), Van Breemen
patent: 4468092 (1984-08-01), Inoue et al.
patent: 4531812 (1985-07-01), Oguino
patent: 4635035 (1987-01-01), Clausen et al.
patent: 4725134 (1988-02-01), Ogino
patent: 4923280 (1990-05-01), Clausen et al.
patent: 4936652 (1990-06-01), Clausen et al.

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