发明名称 |
Electron gun for color picture tube |
摘要 |
An electron gun for a color picture tube comprises opposing cup-shaped electrodes each having a plurality of openings laterally aligned in a row, the electrodes being combined such that the openings face each other to form electron lenses. The openings are formed in flat bottom walls of said electrodes, a width of a bridge portion between adjacent openings is 0.5 to 1.5 times a thickness of the bottom wall of each electrode, and corrective plate electrodes are arranged to oppose bridge portions with a predetermined distance therefrom. The electrodes are combined such that spherical aberration of said electron lenses as a whole can be reduced when one of the electrodes is applied with a voltage which is higher than that applied to the other.
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申请公布号 |
US4498026(A) |
申请公布日期 |
1985.02.05 |
申请号 |
US19830462450 |
申请日期 |
1983.01.31 |
申请人 |
HITACHI, LTD. |
发明人 |
YAMAUCHI, MASAAKI;YABE, MINORU;SHIRAI, SHOJI;KOMORO, HIDEMASA;MATSUDA, KENICHI |
分类号 |
H01J29/50;H01J29/56;(IPC1-7):H01J29/50 |
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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