Color display tube system with reduced spot growth

摘要

A color display tube system comprising an electron gun for producing three co-planar electron beams, and including a main deflection system which in operation generates deflection fields of the self-convergent type, and an auxiliary deflection system which in operation generates a 45 DEG magnetic 4-pole field facing the electron gun and moving the outer electron beams away from each other, and a 45 DEG magnetic 4-pole field facing the display screen and moving the outer beams towards each other.