Color purity and covergence magnet for color cathode ray tube

Abstract

Disclosed a color purity and convergence magnet (PCM) for a color cathode ray tube capable of fine-adjusting irrespective of the position of the axial direction of the tube, reducing the influence of an adjusting magnetic field on an electron gun, and increasing the workability for the color cathode ray tube. The color purity and convergence magnet for a color cathode ray tube comprising an inner ring magnet and an outer ring magnet being mounted at the outer circumference of a neck portion in the tube and arranged externally and internally in a radial direction on the same surface orthogonal to the tube axis so as to adjust the static characteristics of the color purity and convergence, wherein a magnetizing force of the same number of poles such as two-pole, four-pole and six-pole is formed at the same angle of the circumference is characterized in that the inner surface of the inner ring magnet is magnetized, and the magnetizing force of the inner ring magnet is smaller than that of the outer ring magnet in a strength.

Dependencies are inferred from the claim text.