Projection tube having an insulating layer of magnesium oxide an

Details Projection tube having an insulating layer of magnesium oxide an Projection tube having an insulating layer of magnesium oxide an

1987-12-01

1989-06-13

Miller, Stanley D.

Electric lamp and discharge devices

With temperature modifier

For lead-in-seal or stem protection

350339R, 350345, 313465, 358236, G02F 113, H01J 2912, H04N 574

Patent

active

048386510

ABSTRACT:
A projection tube includes a liquid crystal cell having liquid crystal material sandwiched between two plates. The cell is addressable by an electron beam and serves as a light valve for plane-parallel light with which the projection tube is illuminated from behind. On the side facing the liquid crystal material, the plate on which the electron beam writes has dot coatings of indium-tin oxide to achieve a high resolution and a sharp definition of the image to be displayed on a screen. The side of the plate on which the electron beam writes has an insulating layer of magnesium oxide.

REFERENCES:
patent: 3293474 (1963-08-01), Gibson
patent: 3825791 (1974-07-01), Kazan
patent: 3908148 (1975-09-01), Lehrer et al.
patent: 3982150 (1976-09-01), Mossman
patent: 4683398 (1987-07-01), Vriens et al.
patent: 4744636 (1988-05-01), Haven et al.
D. A. Haven, "Electron-Beam Addressed Liquid Crystal Light Valve", IEEE Transaction on Electronic Devices, vol. ED-30, No. 5, May 1983.
I. F. Chang "Electron Beam Addressable Liquid Crystal Display with Storage Capability" IBM Tech. Disclosure Bulletin, vol. 16, No. 1, pp. 353, June 1973.

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