Color display tube

Details Color display tube Color display tube

1986-08-27

1990-02-20

Wieder, Kenneth

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313431, H01J 2954, H01J 2970

Patent

active

049029282

ABSTRACT:
In a color display tube including an electron gun system for producing three electron beams situated with their axes in one plane, coincides to the said plane, curved field shapers 27, 28 are provided at the end of the system. Each field shaper comprises at least three plates of ferromagnetic material. The plates are situated symmetrically with resepect to the plane and the central beam axis, and the curved field shapers face the three beams with their concave sides. The field shapers make the edge field of the frame deflection field pin-cushion-shaped. Each field shaper comprises at least two circumferentially-spaced plates and slots 35, 36 between the plates are covered by plates 31, 34, so that at least one magnetic shunt is formed in each field shaper. The line deflection field is attenuated less and a field disturbance at the area of the electron beams is prevented.

REFERENCES:
patent: 3252032 (1966-05-01), Kautz et al.
patent: 3949262 (1976-04-01), Ohkoshi et al.
patent: 4330709 (1982-05-01), de Chambost
patent: 4346327 (1982-08-01), Barten
patent: 4415831 (1983-11-01), Konosu

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