公开(公告)号：US20040041513A1

公开(公告)日：2004-03-04

申请号：US10625224

申请日：2003-07-22

申请人： Matsushita Electric Industrial Co., Ltd.

发明人： Masaki Kawasaki ,  Naoki Yamauchi ,  Kenji Saito ,  Tetsurou Ozawa

IPC分类号： H01J031/00

CPC分类号： H01J29/003 ,  H01J2229/003

摘要： An internal magnetic shield is joined to a color selection electrode structure including a color selection electrode, a pair of longer side frames supporting the color selection electrode with tension being applied and a pair of shorter side frames joined to the pair of longer side frames. Magnetic shielding members inclined at an inclination angle null (nullnull0null) to a tube axis are provided on lateral surfaces of shorter sides of the internal magnetic shield. Phosphor screen side edges of the magnetic shielding members are located between the color selection electrode and a plane that passes through color selection electrode side ends of the pair of shorter side frames and is perpendicular to the tube axis. In this manner, magnetic shielding characteristics can be improved against not only a transverse magnetic field but a tube axis magnetic field. Consequently, mis-landing of the electron beam caused by terrestrial magnetism can be prevented, thereby providing a cathode ray tube with reduced color displacement in a screen.

摘要翻译： 内部磁屏蔽被连接到选色电极结构，该选色电极结构包括选色电极，一对支持选色电极的长边框，其中施加有张力，以及一对连接到该一对长边框的短边框。 在内部磁屏蔽的短边的侧表面上设置有以管轴倾斜角θ（θ<0°）倾斜的磁屏蔽构件。 磁屏蔽构件的荧光屏侧边缘位于选色电极和通过该对短边框的选色电极侧端并垂直于管轴的平面之间。 以这种方式，不仅可以改善横向磁场而且可以改善管轴磁场的磁屏蔽特性。 因此，可以防止由地磁引起的电子束的错落，从而在屏幕中提供具有降低的颜色位移的阴极射线管。