公开(公告)号：US4310780A

公开(公告)日：1982-01-12

申请号：US72913

申请日：1979-09-06

申请人： Soichi Sakurai ,  Kyohei Fukuda ,  Masanobu Takata

发明人： Soichi Sakurai ,  Kyohei Fukuda ,  Masanobu Takata

IPC分类号： H01J29/50 ,  H01J29/64 ,  H01J29/51

CPC分类号： H01J29/64

摘要： An electron beam focusing structure for a three in-line gun color picture tube comprises a permanent magnet or a focusing coil and a pair of magnetic yokes made of magnetic material high in magnetic permeability and having beam-passing through-holes and being disposed opposite to each other and perpendicular to the axis of the tube, for controlling the focusing magnetic fields generated for the plural electron beams by the permanent magnet or focusing coil in such a manner that the beams converge near the phosphor screen and focused respectively on the phosphor screen. The magnetic yokes are provided with cylindrical magnetic members extending in the axial direction of the tube, the cylindrical magnetic members for the center beam being different in length from the cylindrical magnetic members for the side beams, whereby the effective pole gap lengths for the respective beams between the magnetic yokes are so controlled as to provide optimum focusing fields for the respective beams. As an alternative form of the magnetic members, recesses are provided in the periphery of the throughholes with different depths.

摘要翻译： 一种用于三行串联枪彩色显象管的电子束聚焦结构，包括永磁体或聚焦线圈以及由磁导率高的磁性材料制成并具有光束通过通孔并与之相对设置的一对磁轭 彼此垂直于管的轴线，用于通过永磁体或聚焦线圈控制由多个电子束产生的聚焦磁场，使得光束在荧光屏附近会聚并分别聚焦在荧光屏上。 磁轭设置有沿管轴向延伸的圆柱形磁性构件，用于中心梁的圆柱形磁性构件的长度与用于侧梁的圆柱形磁性构件的长度不同，由此各个梁的有效磁极间隙长度 在磁轭之间被控制以便为各个光束提供最佳聚焦场。 作为磁性构件的替代形式，在具有不同深度的通孔的周边设置有凹部。

公开(公告)号：US4362964A

公开(公告)日：1982-12-07

申请号：US89095

申请日：1979-10-29

申请人： Soichi Sakurai ,  Kyohei Fukuda ,  Masanobu Takata

发明人： Soichi Sakurai ,  Kyohei Fukuda ,  Masanobu Takata

IPC分类号： H01J29/50 ,  H01J29/64 ,  H01J29/68 ,  H01J29/52 ,  H01J29/56

CPC分类号： H01J29/68

摘要： There is disclosed an in-line type three-gun color picture tube with a couple of magnetic members inside its neck portion and a further magnet outside its neck portion. The respective magnetic members are provided with three through-holes permitting electron beams emitted from the electron guns to pass through and are disposed separately in a beam traveling path, so that the periphery of the through-holes of one of the magnetic members is magnetized in S pole and that of the other magnetic member is magnetized in N pole, and accordingly a focusing magnetic field is formed between the respective pairs of the through-holes which are opposite to each other. The magnetic pieces are disposed between the adjacent through-holes to intensify the magnetic field in the alignment of the through-holes which is weakened due to the presence of the through-holes, so that the focusing magnetic field in the alignment of the through-holes is compensated and accordingly the respective focusing magnetic fields become symmetrical with respect to their axes.

摘要翻译： 公开了一种在其颈部内具有一对磁性构件的直列式三枪彩色显像管，在其颈部外部还有一个磁体。 各个磁性部件设置有三个通孔，允许从电子枪发射的电子束通过，并且分别设置在光束传播路径中，使得一个磁性部件的通孔的周边被磁化 S极和另一个磁性构件的磁极在N极中被磁化，因此在彼此相对的各对通孔之间形成聚焦磁场。 磁片被布置在相邻的通孔之间，以增强由于通孔的存在而使通孔对准的磁场，使得通孔对准中的聚焦磁场， 孔被补偿，因此相应的聚焦磁场相对于它们的轴线对称。