发明名称 |
DEVICE FOR GENERATING ELECTRONS, AND DISPLAY DEVICE |
摘要 |
PHN 12.909 20-07-1989 . Device for generating electrons, and display device. A planar electron-optical lens is obtained on a semiconductor cathode surface by providing an extra electrode (16) around the gate electrode (14). Dependent on the applied voltage, this configuration operates, for example, as a positive lens which supplies parallel beams without dispersion, suitable for thin, flat display devices. A large positioning tolerance is obtained due to the inherent magnification of the beam diameter in the semiconductor device, while a grid can be dispensed with.
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申请公布号 |
CA2015396(A1) |
申请公布日期 |
1990.10.28 |
申请号 |
CA19902015396 |
申请日期 |
1990.04.25 |
申请人 |
PHILIPS' (N.V.) GLOEILAMPENFABRIEKEN |
发明人 |
HOEBERECHTS, ARTHUR M. E.;LAMBERT, NICOLAAS;VAN GORKOM, GERARDUS G. P. |
分类号 |
H01J1/304;H01J1/308;H01J3/02;H01J3/18;H01J29/48;H01J29/62;H01J31/12;(IPC1-7):H01J1/30 |
主分类号 |
H01J1/304 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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