发明授权
US4707633A Shadow mask for enhanced resolution and brightness in color cathode ray
tubes
失效
阴影掩模,用于提高彩色阴极射线管的分辨率和亮度
- 专利标题: Shadow mask for enhanced resolution and brightness in color cathode ray tubes
- 专利标题(中): 阴影掩模,用于提高彩色阴极射线管的分辨率和亮度
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申请号: US797697申请日: 1985-11-13
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公开(公告)号: US4707633A公开(公告)日: 1987-11-17
- 发明人: Toshiharu Hoshi
- 申请人: Toshiharu Hoshi
- 申请人地址: JPX
- 专利权人: Nippon Gakki Seizo Kabushiki Kaisha'
- 当前专利权人: Nippon Gakki Seizo Kabushiki Kaisha'
- 当前专利权人地址: JPX
- 优先权: JPX59-240243 19841114
- 主分类号: H01J29/07
- IPC分类号: H01J29/07 ; H01J29/81
摘要:
In construction of a shadow mask for color picture tubes, use of Invar for the shadow mask suppresses thermal deformation caused by electron beam impingement and provision of a four pole magnet frame surrounding each mask aperture causes increased convergence of electron beams, thereby enabling production of images with high resolution and brightness.
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