In-line electron gun

Details In-line electron gun In-line electron gun

1986-09-08

1988-03-01

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

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

313414, H01J 2956, H01J 2950

Patent

active

047288590

ABSTRACT:
In an in-line electron gun for a color picture tube, 10c aligned with three cathodes 10a, 10b and 10c, through-holes of a control grid 11 and an accelerating electrode 12 are spaced by a distance S.sub.1 ; distance S.sub.2 between inlet through-holes 13a, 13b and 13c of a first focusing electrode 13 are spaced by a distance S.sub.3 ; outlet through-holes 13d, 13e and 13f of the first focusing electrode 13 and inlet through-holes 14a, 14b and 14c of a second focusing electrode 14 are spaced by a distance S.sub.3 ; outlet through-holes 14d, 14e and 14f of the second focusing electrode 14 and of an anode, 15 are spaced by a distance S.sub.4. The distances are selected to have a relation of S.sub.4 <S.sub.3 <S.sub.1 <S.sub.2, enabling misconvergence to be minimized.

REFERENCES:
patent: 4275332 (1981-06-01), Ashizaki et al.
patent: 4612474 (1986-09-01), Ashizaki et al.

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