发明名称 |
Color CRT system and process with dynamic quadrupole lens structure |
摘要 |
For use in a color cathode ray tube (CRT) having a self-converging yoke for applying an asymmetric magnetic field in a synchronous manner to a plurality of inline electron beams for deflecting the electron beams across a phosphorescing screen in the CRT, wherein the magnetic field causes defocusing of and an astigmatism of the electron beams where incident upon the CRT screen in off-center regions of the screen, an electron gun comprising: a cathode for generating electrons; a beam crossover arrangement for receiving electrons from the cathode and for forming a beam crossover; a first electrostatic quadrupole field aligned in a spaced manner along the electron beams and having a first asymmetric aperture through which the inline electron beams pass for applying a first electrostatic quadrupole field to the electron beams in compensating for the defocusing and astigmatism of the electron beams; and a second electrostatic quadrupole field aligned in a spaced manner along the electron beams with the first electrostatic quadrupole field and having a second asymmetric aperture through which the inline electron beams pass for applying a second electrostatic quandrupole field to the electron beams for further compensating for the defocusing and astigmatism of the electron beams.
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申请公布号 |
US5036258(A) |
申请公布日期 |
1991.07.30 |
申请号 |
US19890392630 |
申请日期 |
1989.08.11 |
申请人 |
ZENITH ELECTRONICS CORPORATION |
发明人 |
CHEN, HSING-YAO;GORSKI, RICHARD M. |
分类号 |
H01J29/50;H01J29/51;H01J29/62 |
主分类号 |
H01J29/50 |
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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