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    Electron gun
    2.
    发明公开
    Electron gun 失效
    电子枪

    公开(公告)号：EP0178857A2

    公开(公告)日：1986-04-23

    申请号：EP85307284.1

    申请日：1985-10-11

    申请人： RCA LICENSING CORPORATION

    发明人： Chen, Hsing-Yao

    IPC分类号： H01J29/50

    CPC分类号： H01J29/503 ,  H01J2229/4841 ,  H01J2229/4865 ,  H01J2229/4872

    摘要： An inline electron gun (26:26') for a cathode-ray tube (8) includes an improved beam forming region comprising three cathodes (34), a control grid (36) and a novel screen grid electrode means (38, 38'), the latter comprising two spaced apart metal members (G2a, G2b;G2a',G2b'). In one embodiment (26), the first member (G2a) closest to the control grid is relatively thick and has three slots (52) formed in one surface thereof facing away from the control grid. Circular apertures (54) are formed within the slots and extend through the body of the first member. The second member (G2b) has three circular apertures (56) therethrough aligned with the circular apertures in the first member. When a dynamic signal is superimposed on the DC bias voltage and applied to the second member, the first member shields the control grid from the dynamic signal so that little or no brightness modulation occurs. In a second embodiment (26'), the first (G2a') and second (G2b') members of the screen grid (38') are structurally interchanged. In a third embodiment, the first (G2a) and the second (G2b) members have orthogonally disposed rectangular slots formed in facing surfaces.

    摘要翻译： 用于阴极射线管（8）的直列式电子枪（26:26'）包括改进的射束形成区域，该射束形成区域包括三个阴极（34），控制栅极（36）和新颖的栅格栅极电极装置（38,38' ），后者包括两个间隔开的金属构件（G2a，G2b; G2a'，G2b'）。 在一个实施例（26）中，最接近控制栅格的第一构件（G2a）相对较厚并且具有形成在其背离控制栅格的一个表面中的三个狭槽（52）。 圆形孔（54）形成在槽内并延伸穿过第一构件的主体。 第二构件（G2b）具有三个与第一构件中的圆形孔对齐的圆形孔（56）。 当动态信号叠加在直流偏置电压上并施加到第二部件上时，第一部件将控制栅极与动态信号隔离开，使得很少或不发生亮度调制。 在第二实施例（26'）中，筛网（38'）的第一（G2a'）和第二（G2b'）构件在结构上互换。 在第三实施例中，第一（G2a）和第二（G2b）构件具有在相对表面中形成的正交设置的矩形槽。