Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Patent
1981-01-26
1983-10-11
Farley, Richard A.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
315400, 336178, 336212, 336215, H01J 2970, H01J 2956
Patent
active
044095236
ABSTRACT:
A pincushion distortion correction saturable reactor is a saturable transformer comprising a core having four legs, controlled and control coils being coupled to the core legs in a perpendicular relation to each other. The core gap for the controlled coil is provided in an unbalanced form, and a parabolic current at the vertical scanning frequency (or at horizontal scanning frequency) containing a superimposed DC component is supplied through the control coil to modulate the inductance of the controlled coil. The inductance of the controlled coil is thus reduced in a region where the magnetomotive force produced by the control coil is greater than that produced by the control coil to preclude deflectional distortion in the neighborhood of the center of the reproduction on the screen and improve the horizontal linearity.
REFERENCES:
patent: 3413580 (1968-11-01), Gibas
patent: 3433998 (1969-03-01), Wolber
patent: 3443198 (1969-05-01), Wanlass
patent: 3990030 (1976-11-01), Chamberlin
Farley Richard A.
Sony Corporation
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