Color picture tube with reduced dynamic focus voltage
    1.
    发明公开
    Color picture tube with reduced dynamic focus voltage 失效
    Farbbildröhremit verringerter dynamischer Fokussierspannung

    公开(公告)号:EP0805473A3

    公开(公告)日:1998-07-15

    申请号:EP97111760

    申请日:1994-10-31

    申请人: HITACHI LTD

    IPC分类号: H01J29/48 H01J29/50 H01J29/62

    CPC分类号: H01J29/503 H01J2229/4841

    摘要: In an in-line color picture tube, the length L of the focussing electrode (12) constituting the main lens of the electron gun is at least two times of the diameter D of the main lens and the focussing electrode (12) includes a first electrode (121), a second electrode (122), and a third electrode (123). The electron gun has a correction electron for forming a quadrupole lens in at least one of the opposing ends of the first electrode (121) and the second electrode (122) and the opposing ends of the second electrode (122) and the third electrode (123) and a voltage which varies in synchronization with the deflection current is applied to the fist electrode (121) and the third electrode (123), respectively.

    摘要翻译: 在直列式彩色显象管中,构成电子枪主透镜的聚焦电极(12)的长度L至少是主透镜直径D的两倍,聚焦电极(12)包括第一 电极(121),第二电极(122)和第三电极(123)。 电子枪具有用于在第一电极(121)和第二电极(122)的相对端中的至少一个中以及第二电极(122)和第三电极(122)的相对端中形成四极透镜的校正电子。 123),并且分别向第一电极(121)和第三电极(123)施加与偏转电流同步变化的电压。