CATHODE RAY TUBE

摘要

PROBLEM TO BE SOLVED: To overcome problems that miss landing by earth magnetism tends to be remarkably deteriorated and properties of lateral magnetic field and tube axis NS is in relation of trade off as variation rate is nearly equal and symbols become reversed, but that it is impossible to improve both properties at the same time. SOLUTION: A skirt in the vicinity of center of longer side in skirts of a magnetism shield body is coupled with a head of a frame. Other skirts are disposed at a certain distance from a mask frame to prevent contact with the mask frame.