Electron gun for color picture tube
专利汇可以提供Electron gun for color picture tube专利检索，专利查询，专利分析的服务。并且PURPOSE: To decrease the distortion in the form of a beam spot due to deviation and aberration by forming a groove great in height and a groove great in width on the side of the second grid of a cup-shaped control electrode and a through hole at their cross point.
CONSTITUTION: A cup-shaped control electrode 10 is provided with an oval end faces 12 and on the sides of the second grids of these end faces are formed grooves 13 great in height. These are formed grooves great in width on the sides of the cathodes of the end face parts 12. Moreover, at the cross point of these grooves 13, 14 is formed a through hole 15. These grooves 13, 14 and through hole 15 are manufactured by cutting, etching and so forth. Therefore the crossover position in the horizontal direction is nearer to the cathode side than that in the vertical direction, beam spots which are compressed in the horizontal direction and are greater in height than in width are formed on a screen surface, the distortion of beam spot shape on the circumferential part can be reduced.
COPYRIGHT: (C)1980,JPO&Japio，下面是Electron gun for color picture tube专利的具体信息内容。
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