Projection type green cathode ray tube, method for manufacturing

Details Projection type green cathode ray tube, method for manufacturing Projection type green cathode ray tube, method for manufacturing

1982-06-04

1985-05-21

Murray, Richard

Facsimile and static presentation processing

Static presentation processing

Attribute control

2523014R, H04N 931

Patent

active

045189854

ABSTRACT:
A projection type green cathode ray tube (CRT) with improved brightness despite an increase in the temperature of the faceplate, a method for manufacturing a phosphor screen adopted therein, and a projection video device which utilizes the projection type green CRT. The phosphor screen of the CRT is formed of a cerium-activated calcium sulfide phosphor which contains 0.01 to 0.3 mol% of cerium. According to the method for manufacturing the phosphor screen, the cerium-activated calcium sulfide phosphor is precipitated in a 0.3 to 5% aqueous solution of water glass based on weight. The aqueous solution does not contain barium ions. The projection video device includes the green CRT, a red CRT having a phosphor screen which is formed of an europium-activated yttrium oxide phosphor, and a blue CRT having a phosphor screen which is formed of a silver-activated zinc sulfide phosphor. Brightness of images is improved and does not substantially change over time.

REFERENCES:
patent: 2590240 (1952-03-01), Epstein
patent: 2776908 (1957-01-01), Smith
patent: 2989584 (1961-06-01), Mengle
patent: 3617332 (1971-11-01), Lehmann
patent: 3898174 (1973-08-01), Lehmann
patent: 3984587 (1976-10-01), Lipp
patent: 4216408 (1980-08-01), Verstegen et al.
W. Lehmann et al., "Cathodoluminescence of CaS:Ce.sup.3+ and CaS:Eu.sup.2+ Phosphors", Journal of Electrochemical Society, vol. 118, p. 477.

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