基本信息:
- 专利标题： Electron guns for cathode ray tubes
- 专利标题（中）：电子射线管的电子枪
- 申请号：EP88311466.2 申请日：1988-12-02
- 公开(公告)号：EP0319328A3 公开(公告)日：1990-05-30
- 发明人： Leyland, John Derek , Banbury, John Randolph
- 申请人： RANK BRIMAR LIMITED
- 申请人地址： Greenside Way, Middleton Manchester M24 1 SN GB
- 专利权人： RANK BRIMAR LIMITED
- 当前专利权人： RANK BRIMAR LIMITED
- 当前专利权人地址： Greenside Way, Middleton Manchester M24 1 SN GB
- 代理机构： Perkins, Janet Frances
- 优先权： GB8728481 19871204
- 主分类号： H01J29/48
- IPC分类号： H01J29/48
摘要：
The gun comprises a cathode (C), a control grid (G), a first anode (A1) a second anode (A2) and a third anode (A3). Preferably a beam width limiting aperture (BL) is provided in the first anode (A1). In one example the current modulating voltage applied to the grid is 0 to -50V, the voltage applied to the first anode is +5kV, the focus voltage applied to the second anode is +500V, and the EHT voltage applied to the third anode is +25kV. A main focussing lens is formed by the second and third anodes, but the spacing of the first and third anodes is small so that the focussing effect is also substantially dependent on the voltage of the first anode. The field strength between the grid and first anode is high, which combined with the high A1 voltage produces a small crossover.
公开/授权文献:
- EP0319328B1 Electron guns for cathode ray tubes 公开/授权日：1995-09-13