Process and apparatus for displaying an image in front of an opt

Details Process and apparatus for displaying an image in front of an opt Process and apparatus for displaying an image in front of an opt

1978-11-17

1981-05-26

Davie, James W.

350356, 350357, G02F 101

Patent

active

042694809

ABSTRACT:
The present invention is directed to a process and display for producing an image in front of an optically contrasting background. The display installation is characterized by a preferably but not necessarily, plate-shaped body having exit windows for emitting light in given areas and light valves associated with each of the exit windows for controlling the light being emitted therefrom. The light valves include filters which have an absorption frequency range and the plate member emits light from the exit windows in an emission frequency range. One of the members, either the filter member or the plate member, can have its associated frequency range shifted by the application of an electrical field so that light can pass through the filter without being absorbed or is absorbed by the filter.

REFERENCES:
patent: 3317266 (1967-05-01), Heller et al.
patent: 3656835 (1972-04-01), Johnson et al.
patent: 4167307 (1979-09-01), Cirkler et al.
G. Baur et al., "Fluorescence-activated liquid-crystal display", APL, vol. 31, No. 1, Jul. 1, 1977, pp. 4-6.

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