Filter-coated phosphor

Details Filter-coated phosphor Filter-coated phosphor

1980-04-09

1982-01-05

Robinson, Ellis P.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Particulate matter

313466, 313468, 2523014S, 2523014R, 427218, 428407, 428701, 428702, C09K 1146, H01J 2928, H01J 2920

Patent

active

043094813

ABSTRACT:
Disclosed is a filter-coated phosphor having phosphor particles coated with filter particles formed of pigments of the same color as that of light emitted from the phosphor, the phosphor particles coated with the filter particles being additionally coated with a borate compound. According to this filter-coated phosphor, the filter particles never exfoliate from the surfaces of the phosphor particles in a slurry, satisfactory dispersibility is obtained in the slurry, and the slurry pH is stable. A phosphor screen of a color picture tube obtained with use of the filter-coated phosphor exhibits highly outstanding contrast and luminous efficiency.

REFERENCES:
patent: 2202233 (1940-05-01), Schad
patent: 3294569 (1966-12-01), Messineo
patent: 4020231 (1977-04-01), Hedler
patent: 4173660 (1979-01-01), Lasky
patent: 4209567 (1980-06-01), Takahara

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