公开(公告)号：US5744903A

公开(公告)日：1998-04-28

申请号：US635339

申请日：1996-04-19

申请人： Willibrordus A.J.A. Van Der Poel ,  Antonius W.F. Van De Heijden

发明人： Willibrordus A.J.A. Van Der Poel ,  Antonius W.F. Van De Heijden

IPC分类号： H01J31/20 ,  H01J29/48 ,  H01J29/50 ,  H01J29/62

CPC分类号： H01J29/503 ,  H01J2229/4841 ,  H01J2229/4862 ,  H01J2229/4865

摘要： Color cathode ray tube (1) device having an electron gun (6) of the in-line type for generating three electron beams (7,8,9), a display screen (10) and deflection coils (11) for scanning the electron beams over the display screen. The electron gun includes a main lens part for focusing the electron beams on the display screen, the main lens part comprising main lens electrodes (26, 27) having apertures for passing of the electron beams, at least one of said main lens electrodes comprising two sub-electrodes (26a, 26b) adjacent to each other, each of the sub-electrodes having a central (311, 321) and two outer apertures (312, 322, 313, 323), whereby in operation between the adjacent sub-electrodes an astigmatic quadrupole field is generated. For the central apertures of the sub-electrodes it holds: xQa.ltoreq.xQb and for the two outer apertures of the sub-electrodes it holds: yQa.ltoreq.yQb.

摘要翻译： 具有用于产生三束电子束（7,8,9）的直列式电子枪（6）的彩色阴极射线管（1）装置，用于扫描电子的显示屏（10）和偏转线圈（11） 光束在显示屏上。 电子枪包括用于将电子束聚焦在显示屏上的主透镜部分，主透镜部分包括具有用于使电子束通过的孔的主透镜电极（26,27），所述主透镜电极中的至少一个包括两个 彼此相邻的子电极（26a，26b），每个子电极具有中心（311,321）和两个外部孔（312,322,313,323），由此在相邻的子电极 产生散光四极场。 对于其保持的子电极的中心孔径：xQa