一、前言 随着我国电子工业的发展,彩色电视机的普及,彩色显像管用量与日俱增。彩色显像管同黑白显像管在结构上的区别之一,是彩色显像管内都装有一块金属栅网作为选色机构通常称为荫罩、荫罩必须与涂有红、绿、兰彩色粉条的荧光屏保持一定距离、它依靠三只(大屏幕四只)由热双金属片制成的弹簧片支撑在玻壳的销钉上加以固定荫罩的作用是对不同电子枪发出的电子束进行“遮蔽”,这样会使电子束轰击荧光屏上涂的对 I. Introduction With the development of China’s electronics industry, the popularity of color television sets, increasing the amount of color picture tubes. One of the structural differences between a color picture tube and a black and white picture tube is that a color grid is provided with a metal grid as a color selection mechanism, commonly referred to as a shadow mask. The shadow mask must be kept in contact with a phosphor screen coated with red, green and blue tinsel A certain distance, it relies on the three (large screen four) made of hot bimetallic leaf spring support pin on the glass bulb to be fixed shadow mask role is to electron beam emitted by different electron gun “shadow”, so Will make the electron beam bombard the fluorescent screen coated pair