发明授权
- 专利标题： Color cathode ray tube having a low dynamic focus voltage
- 专利标题（中）： 具有低动态聚焦电压的彩色阴极射线管
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申请号： US808037申请日： 1997-03-04
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公开(公告)号： US5739631A公开(公告)日： 1998-04-14
- 发明人: Tutomu Tojyou , Shoji Shirai , Shinichi Kato
- 申请人： Tutomu Tojyou , Shoji Shirai , Shinichi Kato
- 申请人地址： JPX Tokyo
- 专利权人： Hitachi, Ltd.
- 当前专利权人： Hitachi, Ltd.
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX6-167120 19940719
- 主分类号： H01J29/48
- IPC分类号： H01J29/48 ; H01J29/50 ; H01J29/62 ; H01J29/38
摘要：
A color cathode ray tube includes a final lens, a multipole lens and a lens for correction of curvature of the image field. The final lens focuses more horizontally and its strength weakens in accordance with an angle of beam deflection. The strength of the multipole lens for elongating a cross section of electron beams horizontally weakens in accordance with an angle of beam deflection. The lens for correction of curvature of the image field weakens in accordance with an angle of beam deflection.
公开/授权文献
- US5298181A Thickened pourable aqueous abrasive cleanser 公开/授权日：1994-03-29
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