Multicolor image or picture projecting system using electronical

Details Multicolor image or picture projecting system using electronical Multicolor image or picture projecting system using electronical

1979-05-14

1983-01-18

Stephan, Steven L.

Optics: image projectors

Composite projected image

Multicolor picture

350331R, 350331T, 350334, 350349, 353 53, 353 84, 353120, 353122, 358 61, G02F 113, G03B 2110, G03B 2126

Patent

active

043689639

ABSTRACT:
A large image or picture system includes a flat screen, on which is projected pictures from three small liquid crystal display panels behind or in front of which are disposed respectively three filters of the colors red, green and blue. Three light sources are provided behind the respective liquid crystal panels, while three lenses are provided respectively in front of the liquid crystal panels. The lenses project three partial pictures in three different colors onto a single screen, creating a complete multicolored picture. For high capability of information of the pictures, large liquid crystal panels are proposed, which are assembled from many small liquid crystal cells, allowing rapid switching and multiplexing. Changing the frequency of the voltage applied to the liquid crystal cells results in a modulation of the light intensity of the individual parts of the picture, resulting in artistic pictures, like photographs.

REFERENCES:
patent: 3152509 (1964-10-01), Zillmer
patent: 3796484 (1974-03-01), Forster
patent: 3844650 (1974-10-01), Nicholson et al.
patent: 3895866 (1975-07-01), de Quervain et al.
patent: 3944351 (1976-03-01), Ito et al.
patent: 4094058 (1978-06-01), Yasutake et al.
patent: 4116543 (1978-09-01), Stein
patent: 4119842 (1978-10-01), Hayden et al.
patent: 4222641 (1980-09-01), Stolov

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