Deflection yoke device

Details Deflection yoke device Deflection yoke device

1990-09-04

1993-01-26

Yusko, Donald J.

Electric lamp and discharge devices

Cathode ray tube

Beam deflecting means

313414, 313437, 335211, 335212, 335213, H01J 2970

Patent

active

051824876

ABSTRACT:
A deflection yoke device for deflecting an electron beam traveling in the interior of a CRT. The distribution of a magnetic field supplied by horizontal deflection coils to the interior of the CRT forms a barrel magnetic field on the panel side and the neck side, as viewed from the horizontal deflection coils, and a pin magnetic field in an intermediate space therebetween. The deflection yoke device of the invention is provided with a correction coil on the neck side, as viewed from the horizontal deflection coils so as to correct the neck-side magnetic field produced by the horizontal deflection coils into the barrel magnetic field of a greater intensity. The distortion of a beam focus caused by the pin magnetic field is thereby corrected.

REFERENCES:
patent: 3573525 (1971-04-01), Fuse
patent: 4227122 (1980-10-01), Fujisawg et al.
patent: 4642527 (1987-02-01), Takahashi
patent: 4677349 (1987-06-01), Ruby
patent: 4900919 (1990-02-01), Shimoma et al.
patent: 4961021 (1990-10-01), Ogurao et al.

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