Electron gun for a cathode ray tube

Details Electron gun for a cathode ray tube Electron gun for a cathode ray tube

1980-09-26

1983-01-11

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Plural concentrating, accelerating, and/or de-accelerating...

313449, H01J 2946, H01J 2956

Patent

active

043684050

ABSTRACT:
A cathode ray tube electron gun having an electron beam-generating source and a main lens system for focusing electron beams emitted from said electron beam-generating source, wherein the main lens system comprises at least first, second, third and fourth focusing electrodes arranged coaxially and in the order mentioned an counted from said electron beam-generating source; the first and third focusing electrodes are impressed with substantially the same potential; and the fourth focusing electrode is supplied with a prescribed potential higher than those which are applied to said first and third focusing electrodes.

REFERENCES:
patent: 3895253 (1975-07-01), Schwartz et al.
patent: 3995194 (1976-11-01), Blacker et al.
patent: 4124810 (1978-11-01), Bortfeld et al.

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