公开(公告)号：US5777429A

公开(公告)日：1998-07-07

申请号：US605695

申请日：1996-02-22

申请人： Kent L. Headley

发明人： Kent L. Headley

IPC分类号： H01J29/54 ,  H01J29/56 ,  H01J29/76 ,  H01J29/70 ,  H01F7/00 ,  H04N5/645

CPC分类号： H01J29/762 ,  H01J29/566

摘要： A device for correction of negative differential coma error in convergence free deflection yokes. The deflection yoke encloses a portion of a cathode ray tube, including a portion of the cathode ray tube neck, and includes: a separator around which is wound a horizontal deflection coil for providing a horizontal magnetic deflection field; a core around which is wound a vertical deflection coil for providing a vertical magnetic deflection field, the core partially encircling the separator; and a rear cover which attaches the deflection yoke to the cathode ray tube, the rear cover being disposed around the neck of the cathode ray tube and having a first side facing the direction of the screen of the cathode ray tube and resting against a rear end of the separator. In accordance with the present invention, arcuate shunts, which are preferably "C"-shaped and have inside radii which are parallel to the neck of the cathode ray tube, are disposed on the first side of the rear cover, and are preferably centered on a first axis of the neck of the cathode ray tube, such axis being parallel to an axis of the screen of the cathode ray tube. The use of these "C"-shaped shunts is found to correct the negative differential coma error introduced by the convergence free deflection yoke.

摘要翻译： 用于校正会聚自由偏转轭中的负微分彗差的装置。 偏转线圈包围阴极射线管的一部分，包括阴极射线管颈部的一部分，并包括：一个隔膜，围绕着一个水平偏转线圈缠绕以提供一个水平的磁偏转场; 围绕其缠绕用于提供垂直磁偏转场的垂直偏转线圈的芯，所述芯部分地环绕所述隔板; 以及将偏转线圈连接到阴极射线管的后盖，后盖设置在阴极射线管的颈部周围，并且具有面向阴极射线管的屏幕方向的第一侧，并抵靠后端 的分离器。 根据本发明，优选为“C”形且具有与阴极射线管的颈部平行的内半径的弧形分流器设置在后盖的第一侧上，并且优选地位于 阴极射线管的颈部的第一轴线，该轴线平行于阴极射线管的屏幕的轴线。 发现使用这些“C”形分流器来纠正由会聚自由偏转线圈引入的负微分彗差。