Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Patent
1993-01-15
1994-05-31
Blum, Theodore M.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
315 8, H01J 2956
Patent
active
053172396
ABSTRACT:
A deflection yoke having cancelling loop coils for reducing undesired portions of a horizontal deflection magnetic field generated by a deflection yoke body without mislanding. The cancelling loop coils generate a cancelling magnetic field which includes two peaks in a front region and a rear region of the deflection yoke body in which the undesired field portions exist, respectively. The peaks are opposite in direction to the horizontal magnetic field generated by the deflection yoke body, respectively, with same ratio to the deflection magnetic field, so that the undesired magnetic field portions are under-corrected in the front portion and over-corrected in the rear portion.
REFERENCES:
patent: 4853588 (1989-08-01), Ohtsu et al.
patent: 5049847 (1991-09-01), Okuyama et al.
Furuya Minoru
Ohguro Hiroki
Ohsawa Michitaka
Okuyama Nobutaka
Sakurai Soichi
Blum Theodore M.
Hitachi , Ltd.
Hitachi Mizusawa Electronics Co., Ltd.
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