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一、前言随着计算机的普及,计算机辅助设计用显示终端的需求正在迅速扩展.计算机辅助设计用的超高分辨率彩色CRT,一直是用原来的三角形排列电子枪.用这种电子枪的CRT,由于需要采用会聚校正电路,因而具有成本高的缺点.为了降低成本,考虑用自会聚的直列式电子枪.当初它开发用于小型显象管,其后用于大型显象管,再进一步用于提高低、中分辨率显示管的性能.但是很难满足计算机辅助设计终端要求的聚焦性能和会聚性能.本文报导能满足计算机辅助设计所要求的聚焦性能和会聚性能的直列式电子枪,并命名为XF型(扩展场)电子枪.下面将论述这种电子枪的设计思想、三电极部分、主透镜部分、新阴极材料以及性能评价结果.
I. INTRODUCTION With the popularization of computer, the demands of computer-aided design display terminals are rapidly expanding. Computer-aided design of ultra-high resolution color CRT has been used to arrange the original triangle electron gun. With this electron gun CRT, due to Need to adopt the convergence correction circuit, and therefore has the disadvantage of high cost.In order to reduce costs, consider the use of self-convergence in-line gun.It was originally developed for small picture tube, then for large picture tube, and then further used to improve The low and medium resolution shows tube performance, but it is difficult to meet the focusing and convergence performance required by computer-aided design terminals.This article reports in-line electron guns that meet the focusing and convergence performance required by computer-aided design and are named XF (Extended Field) Electron Gun The design concept, the three-electrode part, the main lens part, the new cathode material and the performance evaluation result of this electron gun will be discussed below.