Cathode ray tube having a fluorescent layer with varying amounts

Details Cathode ray tube having a fluorescent layer with varying amounts Cathode ray tube having a fluorescent layer with varying amounts

1986-03-26

1987-11-17

Moore, David

Electric lamp and discharge devices

Cathode ray tube

Screen

313467, 313473, 2523014F, H01J 2918, H01J 2928

Patent

active

047076356

ABSTRACT:
A cathode ray tube having a face plate including a fluorescent screen formed on the inner surface of the face plate. A conventional metal backing layer backs up the fluorescent screen. The improvements of the present invention are involved with the composition of the fluorescent material composition which includes fluorescent particles and not less than 0.6 parts by weight of SiO.sub.2 per 100 parts by weight of fluorescent particles in that portion of the material which contacts the face plate, the amount of SiO.sub.2 being insufficient to cause the brightness of the fluorescent particles to deteriorate, and not more than 0.3 parts by weight of SiO.sub.2 per 100 parts by weight of fluorescent particles in that portion of the fluorescent material which faces the metal backing layer.

REFERENCES:
patent: 4103069 (1978-07-01), Schulze et al.

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