Magnetizing method for use with a cathode ray tube

Details Magnetizing method for use with a cathode ray tube Magnetizing method for use with a cathode ray tube

1977-07-26

1979-02-06

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315 13C, 335210, H01J 2970, H01J 2976

Patent

active

041386280

ABSTRACT:
A magnetic material to be located adjacent a neck portion of a cathode ray tube includes magnetized regions for producing an electron beam moving magnetic field for moving at least one electron beam within the cathode ray tube in a predetermined manner. A method for creating these magnetized regions comprises the steps of developing an appropriate magnetizing field that will magnetize magnetic domains within the magnetic material for creating the magnetized regions, and eliminating from the electron beam moving magnetic field a component contributed by relatively easily demagnetizable magnetic domains within the magnetized regions. The magnetized regions are thereby stabilized against the occurrence of significant changes in the values of the electron beam moving magnetic field.

REFERENCES:
patent: 4027219 (1977-05-01), Van Alphen et al.

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