前言扁平显像管由于具有亮度高、像素多、信息量大等优点,最近又得到国内外的普遍重视。目前已研制成功一种屏幕有效面对角线为31厘米的扁平显像管。其结构特点是:两玻屏对接,电子枪放在侧面。荧光屏上涂复荧光粉后再蒸铝,背面的反射屏上涂复石墨导电层作为电子反射极(见图1)。电子枪发射出的电子束受反射极电场的偏转作用而着屏。再经水平和垂直偏转扫描,在屏上得到光栅。本文对 Introduction The flat picture tube has gained widespread attention both at home and abroad due to its high brightness, large number of pixels and large amount of information. Has successfully developed a screen effective surface area of ​​31 cm flat CRT. Its structural features are: two glass butt, electron gun on the side. Fluorescent screen coated with fluorescent powder and then evaporated aluminum, the back of the reflective screen coated with graphite conductive layer as the electronic reflector (see Figure 1). The electron beam emitted by the electron gun by the deflection of the electric field of the reflector and the screen. After horizontal and vertical deflection scan, the grating on the screen. This article right