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    • 10. 发明授权
    • Cathode ray tube
    • 阴极射线管
    • US06703776B1
    • 2004-03-09
    • US09671986
    • 2000-09-28
    • Nijs Cornelis Van Der VaartGerardus Gegorius Petrus Van GorkomPetrus Hubertus Franciscus Trompenaars
    • Nijs Cornelis Van Der VaartGerardus Gegorius Petrus Van GorkomPetrus Hubertus Franciscus Trompenaars
    • H01J2946
    • H01J29/481H01J3/021
    • A cathode ray tube comprising an electron source and an electron beam guidance cavity having an input aperture and an output aperture, wherein at least a part of the wall of the electron beam guidance cavity near the output aperture comprises an insulating material having a secondary emission coefficient &dgr;1 for cooperation with the cathode. Furthermore, the cathode ray tube comprises a first electrode which is connectable to a first power supply for applying, in operation, an electric field with a first field strength E1 between the cathode and the output aperture. &dgr;1 and E1 have values which allow electron transport through the electron beam guidance cavity. The cathode ray tube further comprises a conventional main lens to obtain a spot on a display screen. According to the invention, an electron lens is placed between the exit of the cavity and the main lens for directing the electron beam at a predetermined angle towards the entrance of the main lens.
    • 一种阴极射线管,包括电子源和具有输入孔和输出孔的电子束引导腔,其中电子束引导腔的靠近输出孔的壁的至少一部分包括具有二次发射系数的绝缘材料 delta1与阴极配合使用。 此外,阴极射线管包括可连接到第一电源的第一电极,用于在操作中施加在阴极和输出孔之间具有第一场强E1的电场。 δ1和E1具有允许电子传输通过电子束引导腔的值。 阴极射线管还包括常规的主透镜,以在显示屏上获得斑点。 根据本发明,电子透镜放置在空腔的出口和主透镜之间,用于将电子束以预定角度引导到主透镜的入口。