公开(公告)号：EP1304716A1

公开(公告)日：2003-04-23

申请号：EP02705166.3

申请日：2002-03-14

申请人： Matsushita Electric Industrial Co., Ltd.

发明人： YAMAUCHI, Naoki ,  IGUCHI, Hideo ,  OMAE, Hideharu ,  KUMEI, Yoshimi ,  OZAWA, Tetsuro ,  KANNAN, Yoko

IPC分类号： H01J29/02

CPC分类号： H01J29/185 ,  H01J29/06 ,  H01J2229/003 ,  H01J2229/863 ,  H01J2229/8634

摘要： In a cathode ray tube including a panel provided with a phosphor screen, a funnel integrated with the panel, an electron gun disposed inside the funnel, a magnetic shield (1) for shielding an electron beam (5) emitted from the electron gun against an external magnetic field, and a frame (2) for holding the magnetic shield (1), the magnetic shield (1) includes, at a portion to be joined with the frame (2), a bent portion (20) bent toward a tube axis side, and a thickness T of the bent portion (20) at its edge on the tube axis side is 0.08 mm or less. By making the thickness T small, halation that is liable to occur in a cathode ray tube with a large deflection angle can be suppressed because electron beams reflected from an end face (11) and allowed to reach the screen without being shielded by the frame (2) are reduced.

摘要翻译： 在包括设置有荧光屏的面板的阴极射线管中，与面板一体化的漏斗，设置在漏斗内的电子枪，用于屏蔽从电子枪发射的电子束（5）的磁屏蔽（1） 外部磁场和用于保持磁屏蔽（1）的框架（2），磁屏蔽（1）在与框架（2）接合的部分处包括弯曲部分（20），弯曲部朝向管 弯曲部（20）的管轴侧的边缘的厚度T为0.08mm以下。 通过使厚度T小，可以抑制由偏转角大的阴极射线管发生的晕变，因为从端面（11）反射而被屏幕不被屏幕遮蔽的电子束 2）减少。