公开(公告)号：US20050104502A1

公开(公告)日：2005-05-19

申请号：US10790083

申请日：2004-03-02

申请人： Kazuo Otsuka ,  Toshimitsu Matsuo ,  Ryoichi Miyahara

发明人： Kazuo Otsuka ,  Toshimitsu Matsuo ,  Ryoichi Miyahara

IPC分类号： H01J9/24 ,  H01J9/42 ,  H01J29/86 ,  H01J31/10

CPC分类号： H01J9/42 ,  H01J29/861

摘要： A glass bulb for use in a projection TV cathode-ray tube includes a face part having a fluorescent film, wherein the face part includes: a light-transmitting region that contains no contaminant having an effective diameter W of at least a defective reference value φ; and a region extending from the surface of the fluorescent film in the light-travel direction, which is located within a reference depth TS and only contains a contaminant having an effective diameter W of at most a measurement reference value φ′, wherein the defective reference value φ is from 0.15 to 0.35 mm; the measurement reference value φ′ is from 0.07 to 0.15 mm; and the reference depth TS is from 2.6 to 4.0 mm. Such a glass bulb can be used for a cathode-ray tube in a wide-screen projection TV and can be prevented from causing a defective projection image on a screen.

摘要翻译： 用于投影电视阴极射线管的玻璃灯泡包括具有荧光膜的面部部分，其中所述面部包括：不具有至少有缺陷参考值phi的有效直径W的污染物的透光区域 ; 以及位于参考深度TS内的从光行进方向的荧光膜的表面延伸的区域，并且仅含有具有至多测定基准值phi'的有效直径W的污染物，其中，所述缺陷基准 值phi为0.15〜0.35mm; 测量基准值phi'为0.07〜0.15mm; 参考深度TS为2.6〜4.0mm。 这种玻璃灯泡可以用于宽屏投影电视机中的阴极射线管，并且可以防止在屏幕上造成有缺陷的投影图像。