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1. 发明授权

US5719476A Apparatus for correcting distortion of an electron beam generated spot on a cathode ray tube screen 失效
标题翻译：用于校正阴极射线管屏幕上的电子束产生点的变形的装置
公开(公告)号：US5719476A
公开(公告)日：1998-02-17
申请号：US605828
申请日：1996-02-23
申请人： Michael Denton Grote
发明人： Michael Denton Grote
IPC分类号： H01J29/70 , H01J29/76 , G09G1/04 , H01J29/50
CPC分类号： H01J29/76 , H01J29/702
摘要： A monochrome cathode ray tube (CRT) yoke includes harmonic windings for correcting spot distortion. In a first embodiment of the invention, the yoke includes harmonic windings in the entrance region of the yoke and harmonic windings in the exit region of the yoke. The harmonic windings in the entrance region produce a barrel-shaped field for correcting spot astigmatism along the diagonals of the CRT. The harmonic windings in the exit region of the yoke produce a pincushion-shaped field for correcting spot elongation along the diagonals of the CRT. In a second embodiment of the invention, the yoke includes harmonic windings only in the entrance region. A stigmator includes quadrupole coils driven at low power vertical scan rates. This allows the stigmator to be positioned near the electron gun and reduces the length of the CRT. In a third embodiment of the invention, the yoke includes harmonic windings only in the exit region.
摘要翻译：单色阴极射线管（CRT）轭包括用于校正光斑变形的谐波绕组。在本发明的第一实施例中，磁轭包括磁轭的入口区域中的谐波绕组和磁轭的出口区域中的谐波绕组。入口区域的谐波绕组产生一个桶形场，用于校正沿着CRT对角线的点散光。轭的出口区域中的谐波绕组产生用于校正沿着CRT的对角线的点延伸的枕形场。在本发明的第二实施例中，轭仅包括在入口区域中的谐波绕组。扼杀器包括以低功率垂直扫描速率驱动的四极线圈。这样可以使瞄准器放置在电子枪附近，并缩短CRT的长度。在本发明的第三实施例中，磁轭仅包括在出口区域中的谐波绕组。

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