公开(公告)号：US3927341A

公开(公告)日：1975-12-16

申请号：US17915471

申请日：1971-09-09

Applicant: RCA CORP

Inventor： HUGHES RICHARD HENRY

IPC: H01J29/50 ,  H01J29/51 ,  H01J31/20

CPC classification number: H01J29/506

Abstract: A conventional three-gun assembly for a color cathode ray tube is modified by eliminating the usual radial convergence cup, mounting the radial convergence pole pieces on the forward ends of the last focus electrodes, and providing each gun with a combination magnetic shield and electrode support member in the form of an open frame of magnetic metal mounted on the insulator support rods and having one side attached to the last focus electrode, an opposite side shielding the associated pole pieces from the other pole pieces, and two other connecting sides. The last focus electrode may be one of two tubular electrodes of small diameter having outwardly-flared ends adjacent to each other.

Abstract translation: 用于彩色阴极射线管的常规三枪组件通过消除通常的径向会聚杯而改变，将径向会聚极片安装在最后聚焦电极的前端上，并为每个枪提供组合磁屏蔽和电极支撑 安装在绝缘体支撑杆上的开放的磁性金属框架形式的构件，并且具有连接到最后一个聚焦电极的一侧，相对的侧面将相关联的极片与另一个极片以及另外两个连接侧相屏蔽。 最后的聚焦电极可以是两个小直径的管状电极之一，其具有彼此相邻的向外扩展的端部。

公开(公告)号：US3873879A

公开(公告)日：1975-03-25

申请号：US34566573

申请日：1973-03-28

Applicant: RCA CORP

Inventor： HUGHES RICHARD HENRY

IPC: H01J29/50 ,  H01J29/51

CPC classification number: H01J29/51 ,  H01J29/50 ,  H01J2229/581 ,  H01J2229/5835

Abstract: The three co-planar beams of an in-line gun are converged near the screen of a cathode ray tube by means of two plate-like grids transverse to the beam paths and having corresponding apertures for the three beams. The three beam apertures of the first grid are aligned with the three beam paths. The two outer beam apertures of the second grid are offset outwardly relative to the beam paths to produce the desired convergence. The three sets of apertures also provide separate focusing fields for the three beams. The second plate-like grid is formed with a barrel shape, concave toward the first grid, to minimize elliptical distortion of beam spots on the screen due to crowding of the adjacent focusing fields. Each of the two outer beams is partially shielded from the magnetic flux of the deflecting yoke by means of a magnetic ring surrounding the beam path in the deflection zone, to equalize the size of the rasters scanned on the screen by the middle and outer beams. Other magnetic pieces are positioned on opposite sides of the path of the middle beam, to enhance one deflection field while reducing the transverse deflection field for that beam.

Abstract translation: 直列式枪的三个共面光束通过横向于光束路径的两个板状栅格会聚在阴极射线管的屏幕附近，并且具有用于三个光束的对应的孔。 第一格栅的三个光束孔径与三个光束路径对准。 第二格栅的两个外光束孔径相对于光束路径向外偏移以产生期望的会聚。 三组孔也为三个梁提供单独的聚焦场。 第二板状栅格形成有朝向第一栅格凹陷的桶形状，以使由于相邻聚焦场的拥挤而使屏幕上的光斑的椭圆形失真最小化。 两个外梁中的每一个通过围绕偏转区域中的光束路径的磁环而部分地屏蔽偏转磁轭的磁通量，以平衡通过中间和外侧光束在屏幕上扫描的光栅的尺寸。 其他磁性片位于中间梁的路径的相对侧上，以增强一个偏转场，同时减小该横梁的横向偏转场。