Liquid crystal light valve in combination with a cathode ray tub

Details Liquid crystal light valve in combination with a cathode ray tub Liquid crystal light valve in combination with a cathode ray tub

1992-01-30

1992-08-18

Cooper, Jack

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

2523014R, 340794, 340795, 359 72, 313468, G02F 11335, G02F 1135, C09K 1180

Patent

active

051404494

ABSTRACT:
A doubly activated yttriuim aluminum garnet (YAG) phosphor, activated with both europium and chromium, is provided. The concentration of Eu ranges from about 1 to 5 at %, while the concentration of Cr ranges from about 0.1 to 1 at %. The YAG:Eu,Cr phosphor has a line spectrum which more closely matches the spectral sensitivity of amorphous silicon liquid crystal light valves thereby, providing more efficient use of the available energy.

REFERENCES:
patent: 3591517 (1971-07-01), Van Der Ziel et al.
patent: 3725811 (1973-04-01), Murphy
patent: 3956170 (1976-05-01), Weber
patent: 4799050 (1989-01-01), Prince et al.
patent: 4806825 (1989-02-01), Catherall
patent: 4925276 (1990-05-01), McMurray et al.
patent: 5009490 (1991-04-01), Kouro et al.
patent: 5084777 (1992-01-01), Slobodin

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