公开(公告)号：US3659135A

公开(公告)日：1972-04-25

申请号：US3659135D

申请日：1970-11-12

Applicant: PHILIPS CORP

Inventor： ROOSMALEN JOHANNES HENDRIKUS T

IPC: H01J3/02 ,  H01J29/56 ,  H01J29/02 ,  H01J29/58

CPC classification number: H01J3/029 ,  H01J29/56

Abstract: The rotationally-symmetric electron gun of a cathode-ray tube device comprises successively a cathode, a disk-shaped control grid provided with a central control, grid aperture and a diskshaped anode grid provided with a central circular-cylindrical anode grid aperture. The cathode comprises a first conductive circular cylinder from the base of which a second conductive circular cylinder projects the base of which forms the emitting surface. The control grid aperture, on the side of the anode grid, has a circular-cylindrical part and, on the side of the cathode, has a conical part which narrows towards the circularcylindrical part, the wall of which encloses substantially an angle of 45* with the axis of the electron gun. The diameter of the said first conductive circular cylinder and the diameter of the said circular-cylindrical part are substantially six times as large as the diameter of the emitting surface, while the diameter of the anode grid aperture is substantially four times as large, the length of the said second conductive cylinder is substantially twice as large, the distance between the emitting surface and the said circular-cylindrical part is substantially equally large, the axial length of the said conical part is at least equally large and the distance between the control grid and the anode grid is substantially one and a half times as large as the diameter of the emitting surface. The control grid is kept at a negative potential relative to the cathode. The anode is kept at a positive potential which is substantially four and a half times as large, relative to the cathode, while the space on the side of the anode grid remote from the control grid is kept substantially field-free.

Abstract translation: 阴极射线管装置的旋转对称电子枪依次包括阴极，设有中心控制器的格盘控制栅格，格栅孔和设置有中心圆柱形阳极栅格孔的盘形阳极栅格。 阴极包括从其底部的第一导电圆柱体，第二导​​电圆柱体突出其底部形成发射表面。 在阳极栅格侧的控制栅格孔具有圆柱形部分，并且在阴极侧具有圆锥形部分，该圆锥形部分朝向圆柱形部分变窄，该圆形部分的壁基本上包围 45°与电子枪的轴。 所述第一导电圆柱体的直径和所述圆柱形部分的直径基本上是发射表面直径的六倍，而阳极栅格孔径的直径基本上是四倍，长度 所述第二导电圆柱体的轴向长度基本上是两倍，发射表面与所述圆柱形部分之间的距离基本相等，所述锥形部分的轴向长度至少相当大，并且控制网格之间的距离 并且阳极栅格基本上是发射表面的直径的1.5倍。 控制栅格相对于阴极保持在负电位。 阳极保持在相对于阴极基本上为四分之一倍的正电位，而远离控制电网的阳极栅极侧的空间基本上保持不变。

公开(公告)号：US3548250A

公开(公告)日：1970-12-15

申请号：US3548250D

申请日：1969-02-10

Applicant: PHILIPS CORP

Inventor： ROOSMALEN JOHANNES HENDRIKUS T ,  VERMULST JOANNES CORNELIS

IPC: H01J31/38 ,  H01J29/56

CPC classification number: H01J31/38