电磁聚焦电子枪在YAG投影CRT中的应用

Proceedings of 5th Asian Symposium on Information Display. ASID '99 (IEEE Cat. No.99EX291) Pub Date : 1999-03-17 DOI:10.1109/ASID.1999.762730

Wang Jun, Zhou Min, Chen Jianbo, Ran Qijun

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引用次数: 0

摘要

将电磁聚焦电子枪成功地应用于高亮度、高清晰度YAG(钇铝石榴石)投影CRT。研制了由静电预聚焦透镜和电磁聚焦透镜组成的双聚焦系统。由于对结构和电压进行了特殊的优化，使电子枪具有优异的性能，特别是大电流性能。因此，在绿色YAG荧光粉屏幕上，阴极电流为0.5-1.0 mA时，束斑直径为0.065-0.080 mm。因此，在3英寸投影CRT屏幕上，水平分辨率超过1200电视线。同时，在阴极电流为1.0 mA，阳极电压为29 kv时，其亮度达到1.4/spl倍/10/sup 5/ cd/m/sup 2/。

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Application of electromagnetic focusing electron gun in YAG projection CRT

An electromagnetic focusing electron gun was used in high-luminance and high-definition YAG (yttrium aluminum garnet) projection CRT successfully. The dual-focusing system in it was developed, which was composed of electrostatic pre-focusing lens and electromagnetic focusing lens. Result from the special optimization of structure and voltage, the electron gun has excellent characteristics especially with high current. As a result, on the green YAG phosphor screen, beam spot diameters of 0.065-0.080 mm at cathode currents of 0.5-1.0 mA. So the horizontal resolution was more than 1200 TV-lines on the 3-in projection CRT screen. Meanwhile, the luminance of 1.4/spl times/10/sup 5/ cd/m/sup 2/ at cathode current of 1.0 mA and anode voltage of 29 kv was achieved.

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Proceedings of 5th Asian Symposium on Information Display. ASID '99 (IEEE Cat. No.99EX291)

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