Electric lamp and discharge devices – Cathode ray tube – Beam deflecting means
Patent
1987-11-12
1990-01-23
Yusko, Donald J.
Electric lamp and discharge devices
Cathode ray tube
Beam deflecting means
313431, 313440, 335210, H01J 2970
Patent
active
048960713
ABSTRACT:
A method is disclosed for the setting of the static convergence and/or purity of a color television tube using permanent magnets. Magnetizable elements are fixed around the color television tube. These elements are evenly distributed around the axis of the tube. To correct the static convergence and/or purity errors, each element is magnetized by means of a corresponding coil, the position and dimensions of which are such that the element is subjected solely to the field within the turns of the coil.
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Horabik Michael
Videocolor
Yusko Donald J.
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