Front projection screen with precision gain control

Details Front projection screen with precision gain control Front projection screen with precision gain control

1981-03-23

1982-10-19

Wintercorn, Richard A.

G03B 2160

Patent

active

043547389

ABSTRACT:
A front projection screen includes a substrate backing member (12), a primer (14) sprayed on the substrate, a metallic silver mixture (16) adjacent to the primer, and a mist flake mixture (20) adjacent to the mixture (16). The mixture (16) includes a combination of lacquer binder (17), mixing color agent (18) and flattening agent (19); the mist flake mixture (20) includes a combination of silver powder flakes (23) and lacquer binder (17). By selectively changing and controlling the ratios of the components of the metallic silver mixture (16) and the mist flake mixture (20), the screen's peak gain and peak gain fall off can be controlled to produce screens exhibiting a selective, high peak gain, or a constant gain independent of the viewing angle, or a gradient gain.

REFERENCES:
patent: 3507548 (1970-04-01), Hoffmann et al.
patent: 3612650 (1971-10-01), Miyano et al.
patent: 3653740 (1972-04-01), Ogura et al.
patent: 3726583 (1973-04-01), Fujisaki et al.
patent: 4025160 (1977-05-01), Martinez
patent: 4068922 (1978-01-01), Dotsko
patent: 4201449 (1980-05-01), Campion et al.
patent: 4206969 (1980-06-01), Cobb et al.

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