Cathode ray tube having a cancel coil for earth magnetism

Details Cathode ray tube having a cancel coil for earth magnetism Cathode ray tube having a cancel coil for earth magnetism

1995-08-04

1996-05-28

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Beam deflecting means

313413, 335213, 335299, H01J 2976

Patent

active

055214630

ABSTRACT:
Image rotation of a cathode ray tube caused by the influence of earth magnetism can be suppressed. An image rotation correcting coil for generating a magnetic field of the direction opposite to that of a horizontal earth magnetism component of the direction vertical to the picture tube is disposed between a deflection yoke formed at the outside of a tube envelope of a cathode ray tube and an anode button.

REFERENCES:
patent: 4296359 (1981-10-01), Dodds
patent: 4899082 (1990-02-01), Sands et al.
patent: 4943753 (1990-07-01), Hevesi
patent: 4992697 (1991-02-01), Penninga et al.
patent: 5021712 (1991-06-01), Sands et al.
patent: 5170094 (1992-12-01), Giannantonio et al.

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