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针对彩色显示系统中三管电子枪截止电压常有的零散与误差现象，从理论分析入手，结合大量实验数据，探讨阴极透镜几何尺寸对截止电压的影响，并提出有效提高截止电压准确性、一致性的方法
Aiming at the common zero-sum and error of the cut-off voltage of the three-tube electron gun in color display system, this paper starts with the theoretical analysis and combines with a large amount of experimental data to discuss the influence of the cathode lens geometry on the cut-off voltage and proposes to effectively improve the cut-off voltage accuracy and consistency Methods