公开(公告)号：US5403989A

公开(公告)日：1995-04-04

申请号：US36399

申请日：1993-03-24

申请人： Hiroaki Tobuse ,  Tomoyuki Kanda ,  Yasusi Hisaoka ,  Shigeo Sasaki ,  Minoru Kobayashi ,  Takuji Oda ,  Ryuji Ueda ,  Akio Yoshida ,  Tadayoshi Owaki ,  Akihiko Yamasaki ,  Masaaki Kinoshita ,  Toshiaki Fukunishi

发明人： Hiroaki Tobuse ,  Tomoyuki Kanda ,  Yasusi Hisaoka ,  Shigeo Sasaki ,  Minoru Kobayashi ,  Takuji Oda ,  Ryuji Ueda ,  Akio Yoshida ,  Tadayoshi Owaki ,  Akihiko Yamasaki ,  Masaaki Kinoshita ,  Toshiaki Fukunishi

IPC分类号： H01J9/50 ,  H04N3/30 ,  B23K15/00

CPC分类号： H04N3/30 ,  H01J9/50 ,  H01J2209/3893 ,  Y02W30/828

摘要： In a color cathode-ray tube, only a foreign matter adhering to a shadow mask is removed effectively without thermal deformation of the shadow mask or thermal denaturation of phosphors.An electron beam produced by an electron gun incorporated in a cathode-ray tube itself is scanned or irradiated to all over a shadow mask of the color cathode-ray tube. The radiant state of a fluorescent screen at this stage is checked to detect a foreign matter adhering to the shadow mask. The electron beam is deflected to align with the position at which the foreign matter is detected, and then irradiated to the foreign matter in the form of pulses. Thus, the foreign matter is heated and removed.

摘要翻译： 在彩色阴极射线管中，只有在荫罩的热变形或荧光体的热变性的情况下才能有效地去除附着在荫罩上的异物。 通过并入阴极射线管本身的电子枪产生的电子束被扫描或照射到彩色阴极射线管的阴影掩模上。 检查在该阶段的荧光屏的辐射状态以检测附着在荫罩上的异物。 电子束被偏转以与检测异物的位置对准，然后以脉冲的形式照射到异物。 因此，异物被加热和去除。