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    • 12. 发明授权
    • Electron gun for a cathode ray tube
    • 用于阴极射线管的电子枪
    • US4205254A
    • 1980-05-27
    • US918810
    • 1978-06-26
    • Hiromi Kanai
    • Hiromi Kanai
    • H01J3/02H01J29/04H01J29/48H01J29/54H01J29/56H01J29/58
    • H01J29/488H01J29/54H01J29/56
    • In an electron gun of a cathode ray tube of the type comprising a cathode electrode for emitting an electron beam, a first grid electrode for focusing the electron beam and a second grid electrode for accelerating the electron beam, the cathode surface which emits the electron beam is a concaved surface which creates different electron beam focusing effects in two orthogonal directions and the first grid electrode comprises a flat plate having an elongated iris opening with its major axis coincided with the direction of the cathode surface in which the focusing effect is strong and the minor axis coincided with the direction of the cathode surface in which the focusing effect is weak.
    • 在包括用于发射电子束的阴极电极的阴极射线管的电子枪中,用于聚焦电子束的第一栅极和用于加速电子束的第二栅极,发射电子束的阴极表面 是在两个正交方向上产生不同的电子束聚焦效应的凹面,并且第一栅极包括具有细长虹膜开口的平板,其长轴与阴极表面的方向一致,其中聚焦效果强, 短轴与聚焦效果弱的阴极表面的方向一致。