Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Patent
1992-04-07
1994-12-27
Blum, Theodore M.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
315400, 313413, 335211, 335213, H01J 2966
Patent
active
053768655
ABSTRACT:
An improved cathode ray tube yoke assembly and cathode ray tube system is capable of reducing or eliminating cathode ray tube geometrical image distortions caused by an inherent non-linear relationship between magnetic deflection fields inside the tube and electron beam spot deflection. The yoke assembly comprises horizontal and vertical windings for producing horizontal and vertical deflection fields and one or more non-linear magnetic elements. The magnetic elements produce a non-linear relationship between driving currents and magnetic deflection fields inside the tube which substantially compensates for the inherent non-linear relationship between deflection fields and electron beam spot deflection. In the preferred embodiment, the inductances of the yoke windings remain constant during operation.
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Blum Theodore M.
Zenith Electronics Corporation
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