Optics: image projectors – Color filter
Patent
1978-09-20
1980-09-16
Shepperd, John W.
Optics: image projectors
Color filter
353 88, 353122, 350331R, G03B 2100, G03B 2114
Patent
active
042226414
ABSTRACT:
A large picture system includes a flat cinema screen, on which is projected pictures from a small transparent liquid crystal display (LCD) pattern panel. A light source is provided behind the pattern panel and a cinema lens is provided in front of the pattern panel. An electronically controlled color filter in one embodiment is placed behind the pattern panel, allowing one to obtain colored figures. In one variant, an electronically controlled gray filter, placed behind the pattern panel allows one to obtain artistic or black-and-white photograph-like pictures. The pattern panel together with the electronically controlled color filter and/or the electronically controlled gray filter forms an electronically controlled slide, a new electronic component.
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patent: 3019704 (1962-02-01), Zillmer
patent: 3569614 (1971-03-01), Hanlon
patent: 3664445 (1972-05-01), Conklin
patent: 3796484 (1974-03-01), Forster
patent: 3844650 (1974-10-01), Nicholson et al.
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