公开(公告)号：US6069438A

公开(公告)日：2000-05-30

申请号：US95052

申请日：1998-06-10

申请人： Hisakazu Okamoto

发明人： Hisakazu Okamoto

IPC分类号： H01J29/54 ,  H01J29/70 ,  G04L3/42

CPC分类号： H01J29/703 ,  H01J2229/5684

摘要： A color CRT including an envelope having a tube axis (Z) and including panel (21) having an inner surface on which a phosphor screen (23) is formed, a funnel (22) connected to the panel (21) and neck (25) connected to the funnel (22), an electron gun assembly (40) arranged in the neck (25) for emitting three in-line electron beams toward the phosphor screen (23), convergence magnetic structure (32) arranged outside of the neck (25) for generating a hexapole magnetic field in the neck (25), a first pair of magnetic members (33A, 33B) arranged outside of the neck on a horizontal axis faced to each other with the electron gun interposed therebetween and extending along the axis of the tube; and a second pair of magnetic members (60A, 60B) so arranged in the X-Y plane as to face each other on a Y-axis and elongated along the magnetic structure (32), respectively, the X-axis corresponding to the horizontal axis, the Y-axis corresponding to the vertical axis normal to the tube axis (Z). The first pair of magnetic members (33A, 33B) extending along the axis of the tube to shield the in-line electron beams from external magnetic fields. The second pair of magnetic members (60A, 60B) are arranged on an inner surface of a ring shaped hexapole magnetic plate 30 symmetrically near the Y-axis. The above arrangement reduces the effect of the magnetic force on the center beam without reducing the effect of the magnetic force on the two side beams in order to minimize the undesired displacement of the center beam.

摘要翻译： 一种彩色CRT，包括具有管轴（Z）并且包括其上形成有荧光屏（23）的内表面的面板（21）的外壳，连接到面板（21）和颈部（25）的漏斗（22） ），连接到所述漏斗（22）的电子枪组件（40），布置在所述颈部（25）中用于向所述荧光屏（23）发射三个一字形电子束的电子枪组件（40），设置在所述颈部外侧的会聚磁性结构 （25），用于在所述颈部（25）中产生六极磁场;第一对磁性构件（33A，33B），其布置在所述颈部的水平轴线的外侧，所述第一对磁性构件（33A，33B） 管轴; 以及第二对磁性构件（60A，60B），其设置在所述XY平面中，以在Y轴上彼此面对并且沿着所述磁性结构（32）分别对应于所述水平轴的X轴， Y轴对应于垂直轴垂直于管轴（Z）。 第一对磁性构件（33A，33B）沿着管的轴线延伸以屏蔽来自外部磁场的一字形电子束。 第二对磁性构件（60A，60B）布置在对称于Y轴附近的环形六极磁板30的内表面上。 上述布置减小磁力对中心光束的影响，而不会减小磁力对两个侧面光束的影响，以便最小化中心光束的不期望的位移。