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1. 发明公开

EP0116465A1 Colour cathode ray tube 失效
标题翻译： Kathodenstrahlröhrezur Wiedergabe farbiger Bilder。
公开(公告)号：EP0116465A1
公开(公告)日：1984-08-22
申请号：EP84300804.6
申请日：1984-02-08
申请人： NEC CORPORATION
发明人： Naiki, Kazuaki
IPC分类号： H01J29/51 , H01J29/56
CPC分类号： H01J29/707 , H01J29/503 , H01J2229/4865 , H01J2229/4872 , H01J2229/4889 , H01J2229/4896
摘要： The tube has an in-line electron gun directing three electron beams through a shadow mask on to the phosphor screen. In order to improve coincidence of the three rasters by reducing coma distortion a shield cup (20) is fitted over the end of the electron gun and has apertures (22, 23, 24) in the bottom (21) of the cup for the three beams. High permeability magnetic members may be arranged on the cup bottom (21) to act as field control members. in order to avoid mis-convergence due to coma distortion even at high deflection frequencies the present invention provides narrow cuts (25) radiating from the apertures (23, 24) for the outside electron beams. Cuts may also be provided in field control members round these apertures.
摘要翻译：该管具有将三根电子束通过荫罩引导到荧光屏上的直列电子枪。为了通过降低彗差来改善三个光栅的一致性，在电子枪的端部安装一个屏蔽杯（20），并且在杯的底部（21）中具有用于三个梁。高渗磁性构件可以布置在杯底部（21）上以用作场控制构件。为了避免即使在高偏转频率下由于昏迷失真而引起的误会，本发明提供从用于外部电子束的孔（23,24）辐射的窄切口（25）。也可以在这些孔周围的现场控制构件中设置切割。

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