Method of, and device for, reducing magnetic stray fields

Details Method of, and device for, reducing magnetic stray fields Method of, and device for, reducing magnetic stray fields

1988-09-07

1990-05-01

Griffin, Robert L.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Pulse storing

315 85, H01J 2906

Patent

active

049221531

ABSTRACT:
A method of, and a device for, reducing the magnetic stray field generated in the vicinity of the faceplate of a cathode ray tube by the deflection current in the deflection coils of the tube. A current loop (4) is arranged at a distance from the deflection coils and is supplied with current having a time function substantially coinciding with the time function of the deflection current. The stray field is thereby neutralized to a large extent in a region extending beyond the position of the current conductor (4) in a direction away from the faceplate.

REFERENCES:
patent: 3340443 (1967-09-01), Rieth et al.
patent: 3735193 (1973-05-01), Ikeuchi
patent: 3947632 (1976-03-01), Giger et al.
patent: 4380716 (1983-04-01), Romeo et al.
patent: 4634930 (1987-01-01), Toshiyasu et al.
patent: 4636911 (1987-01-01), Truskalo

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