Color picture device including convergence correcting magnetic p

Details Color picture device including convergence correcting magnetic p Color picture device including convergence correcting magnetic p

1987-03-18

1988-11-01

Moore, David K.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313433, 313440, 335211, H01J 2954, H01J 2972

Patent

active

047822643

ABSTRACT:
In a color picture device having a tube envelope and an in-line type electron gun assembly disposed in a neck section of the tube envelope, a deflection unit includes a pair of first deflecting coils for deflecting three electron beams in a horizontal scanning direction coinciding with the in-line arranged direction, and a pair of second deflecting coils for deflecting the electron beams in a vertical scanning direction perpendicular to the horizontal scanning direction. A pair of permanent magnet plates is arranged individually between a funnel section and the second deflecting coils, and adapted to form a deflection magnetic field of a direction opposite to the vertical scanning direction.

REFERENCES:
patent: 4143345 (1979-03-01), Barkow
patent: 4246560 (1981-01-01), Shimizu et al.
patent: 4386331 (1983-05-01), Kohzuki et al.
patent: 4433268 (1984-02-01), Arisato

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