Cathode ray tube

Details Cathode ray tube Cathode ray tube

1992-04-17

1996-07-16

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Envelope

H01J 3108

Patent

active

055369979

ABSTRACT:
A cathode ray tube in which a glass-enamel layer having particles with a secondary electron emission coefficient smaller than 1, for example Cr.sub.2 O.sub.3 particles, is provided in the neck. The percentage of particles exceeds approximately 30% and the surface resistance or resistivity ranges between 10.sup.10 and 10.sup.14 .OMEGA./.quadrature.. The high-voltage behavior of such a layer is satisfactory. The convergence drift is relatively small. In addition, a description is given of a method of providing such a glass-enamel layer.

REFERENCES:
patent: 4124540 (1978-11-01), Foreman et al.
patent: 4163919 (1979-08-01), Speigel
patent: 4374344 (1983-02-01), Misono et al.
"Materials and Techniques for Electron Tubes" by W. H. Kohl, Reinhold Publishing Co., N.Y., N.Y., (1962) pp. 60, 155.

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