发明授权
- 专利标题: Electron-gun system
- 专利标题(中): 电子枪系统
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申请号: US200606申请日: 1988-05-31
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公开(公告)号: US4942334A公开(公告)日: 1990-07-17
- 发明人: Helmut Kimmel , Hans Reule
- 申请人: Helmut Kimmel , Hans Reule
- 申请人地址: DEX Pforzheim
- 专利权人: Graetz; Nokia
- 当前专利权人: Graetz; Nokia
- 当前专利权人地址: DEX Pforzheim
- 优先权: DEX3718838 19870605
- 主分类号: H01J29/48
- IPC分类号: H01J29/48 ; H01J29/50
摘要:
In a cathode-ray tube with a thick grid No. 2 (24) in the electron-gun system, current transfer into grid No. 2 (24) may result in a lack of picture sharpness. To avoid this error, the aperture (4) in grid No. 2 (24) has a widening (6) of conical shape or stepped diameter.
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