Erasable thermo-optic storage display of a transmitted image

Details Erasable thermo-optic storage display of a transmitted image Erasable thermo-optic storage display of a transmitted image

1975-06-10

1977-08-02

Curtis, Marshall M.

Communications: electrical

Systems

Portable self-contained

340173LT, 350160LC, G06F 314

Patent

active

040400476

ABSTRACT:
The invention provides an optical display device, utilizing a thermo-optical effect to inscribe a transmitted image in a film of a material exhibiting a smectic state. The crystal liquid layer is inserted between transparent electrodes and heated to be in the smectic mesophase. The image is recorded in the layer under the form of variations in the scattering coefficient thereof by applying the video signal transmitting the image between the electrodes, while an infra-red beam of constant intensity synchronously scans the layer at a constant rate to successively raise each point beyond the melting point of the liquid crystal material. A quick erasure of the recorded image is provided by applying between the electrodes a voltage pulse of suitable value.

REFERENCES:
patent: T940016 (1975-11-01), Nelson
patent: 3438022 (1969-04-01), Teeg et al.
patent: 3524726 (1970-08-01), DeKoster
patent: 3637291 (1972-01-01), Kessler et al.
patent: 3691482 (1972-09-01), Pinnow et al.
patent: 3916420 (1975-10-01), Brown et al.
patent: 3917481 (1975-11-01), Saeva et al.

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