Picture display device with magnetizable core means comprising c

Details Picture display device with magnetizable core means comprising c Picture display device with magnetizable core means comprising c

1989-01-25

1991-02-12

DeMeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Beam deflecting means

315 8, H01J 2976

Patent

active

049926977

ABSTRACT:
Deflection unit mounted around a display tube for deflecting electron beams across the display screen includes a line deflection coil and a field deflection coil. A compensation coil system for generating a magnetic compensation field oppositely directed to the line frequency radiation field in a space in front of the display screen includes core means of a magnetizable material positioned between the display screen and the deflection unit in a plane parallel to the display screen and two diametrically arranged coils each having at least one turn.

REFERENCES:
patent: 2921226 (1960-01-01), Vasilevskis
patent: 3424942 (1969-01-01), Barbin
patent: 4853588 (1989-08-01), Ohtsu et al.

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