Color cathode ray tube having magnetic members for mitigating effects of an external magnetic field along an axial direction of the in-line electron gun

摘要

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.