Color cathode ray tube having magnetic members for mitigating ef

Details Color cathode ray tube having magnetic members for mitigating ef Color cathode ray tube having magnetic members for mitigating ef

1994-06-30

1996-06-25

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Beam deflecting means

335212, H01J 2946

Patent

active

055303153

ABSTRACT:
A pair of magnetic members are provided on an outer surface of a neck tube in a horizontal plane including three electron beams generated from an in-line type electron gun so as to sandwich the three electron beams. The in-line electron gun is enclosed in the thin cylindrical neck tube extending to the rear portion of a funnel glass. The magnetic members are disposed in an axis direction of the electron gun so that at least parts thereof face each other. Providing the magnetic members in this way suppresses the occurrence of the Lorentz force due to the interaction between the two outermost electron beams among the three electron beams and the external magnetic field in the axis direction of the electron gun. Therefore, misconvergence of the electron beams caused by the Lorentz force is prevented.

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patent: 5384513 (1995-01-01), Ji

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