投影CRT用磁聚焦电子枪  

Magnetic Focusing Electron Gun Used in Projection CRT

作　　者：王军[1] 冉启钧[1] 

机构地区：[1]电子科技大学光电子技术系,成都610054

出　　处：《电子科技大学学报》1999年第3期329-332,共4页Journal of University of Electronic Science and Technology of China

基　　金：国家"九五"重点科研项目

摘　　要：论述了一种成功运用于１２２ｃｍ背投式彩色投影电视机阴极射线管（ＣＲＴ）中的磁聚焦电子枪。该枪采用了预聚焦发射系统和磁聚焦主透镜构成的双聚焦系统。经测试发现，当阴极电流为０．５～１．０ｍＡ时，其上屏束斑直径仅为０．０６５～０．０８０ｍｍ。The paper studies the magnetic focusing electron gun of CRT used in a new 48-inch rearcolor projection TV. The dual-focusing system in electron gun is developed, which is composed ofelectrostatic pre-focusing and electromagnetic focusing lens. As a result, on the green YAG phosphorscreen, beam spot is 0.065 mm-0.080mm only at cathode currents of o.5 mA-1.0 mA respectively.

关 键 词：电子枪 投影CRT 束斑直径 磁聚焦 

分 类 号：TN141.31[电子电信—物理电子学]