Picture display device with core means comprising compensation c

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

1989-05-31

1991-07-30

Pascal, Robert J.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Pulse storing

H01J 2900

Patent

active

050362500

ABSTRACT:
Picture display device comprising a display tube, a deflection unit and a compensation coil system for generating a magnetic compensation field which is oppositely directed to the line frequency radiation field of the deflection unit in a space in front of the display screen. The compensation coil system comprises two coils each being wound on a rod-shaped core portion. The core portions are arranged in a V-formation in the y-z plane, symmetrically relative to the x-z plane. Alternatively, the compensation coil system may comprise two pairs of coils arranged in this way and located in planes parallel to the x-y plane and equidistantly therefrom.

REFERENCES:
patent: 4853588 (1989-08-01), Ohtsu et al.
"Cancellation of Leaked Magnetic Flux", IBM Technical Disclosure, vol. 30, No. 12, May 1988.

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