Dual purpose photographic displays

Details Dual purpose photographic displays Dual purpose photographic displays

1976-10-27

1978-08-08

Haroian, Harry N.

Optics: image projectors

Episcope

353122, 353120, G03B 2106

Patent

active

041053133

ABSTRACT:
A visual presentation sheet is provided with a photographic image stratum and a liquid crystal stratum. Under certain energy conditions, the liquid crystal stratum scatters incident light so that the photographic image stratum is visible by direct observation. Under other energy conditions, the liquid crystal stratum is cleared to enable optical projection of the photographic image stratum.

REFERENCES:
patent: 3100420 (1963-08-01), Kuhn
patent: 3576364 (1971-04-01), Zanoni
patent: 3592527 (1971-07-01), Conners
patent: 3697297 (1972-10-01), Churchill et al.
patent: 3758207 (1973-09-01), Letzer

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