Patent
1987-03-03
1989-05-02
Miller, Stanley D.
350342, G02F 113
Patent
active
048262935
ABSTRACT:
An electron beam addressed liquid crystal light valve (LCLV) produces an AC voltage across a liquid crystal layer from a single polarity electron beam, and exhibits very high resolution. A thin layer of partially conductive material is deposited on a support membrane on the electron beam side of the liquid crystal. A conductive, electron beam permeable sheet is formed on the back of the partially conductive layer. Electrons from the beam are absorbed by the partially conductive layer, and then flow back out to the conductive sheet to produce an AC voltage prior to the next electron beam scan. The conductive sheet is connected in circuit with a transparent electrode which provides a voltage reference on the readout side of the liquid crystal. The device is designed with electrical parameters that produce a discharge rate from the partially conductive layer fast enough to complete an AC cycle between successive electron beam scans, but slow enough for the liquid crystal to respond and produce an image. A separate mirror can be provided to reflect the readout beam back through the liquid crystal, or the conductive sheet can itself serve as a mirror.
REFERENCES:
patent: 3650608 (1972-03-01), Baker
patent: 4387964 (1983-06-01), Arrazola et al.
patent: 4728174 (1988-03-01), Grinberg et al.
Grinberg et al, "Photoactivated Birefringent LCLV for Color Symbology Display", Proceeding of the SID, vol. 16/3, 1975.
Chang, "Electron-Beam Addressable LCD with Storage Capability", IBM Technical Bulletin, vol. 16, No. 1, 1973.
Hansen, "Liquid Crystal Media for Electron Beam Recording", IEEE Transactions on Electron Devices, vol. 15, No. 11, Nov. 1963.
D. Haven et al, "Full-Color Electron-Beam Addressed Light-Valve Projector", SID 1986 Digest, pp. 372-374.
D. A. Haven, "Electron-Beam Addressed Liquid-Crystal Light Valve", IEEE Transactions on Electron Devices, vol. ED-30, No. 5, May 1983, pp. 489-492.
D. A. Haven, "Electron-Beam Addressed Liquid-Crystal Light Valve", 1982, International Display Research Conference, pp. 72-74.
Bleha William P.
Grinberg Jan
Koda Nubuo J.
Ledebuhr Arno G.
Reif Philip G.
Duraiswamy V. D.
Hughes Aircraft Company
Karambelas A. W.
Miller Stanley D.
Phan Trong Quang
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