公开(公告)号：US4742279A

公开(公告)日：1988-05-03

申请号：US2065

申请日：1987-01-12

申请人： Jan Gerritsen ,  Joannes C. J. Aerts

发明人： Jan Gerritsen ,  Joannes C. J. Aerts

IPC分类号： H01J29/48 ,  H01J29/50 ,  H01J29/58

CPC分类号： H01J29/503 ,  H01J2229/4841 ,  H01J2229/4865

摘要： Color display tube comprising an electron gun 5 of the in-line type. The electron gun 5 comprises a main lens which is constituted by a first focussing electrode 25 and a second focussing electrode 26. The first focussing electrode comprises sub-electrodes 27, 28 placed at a distance from each other between which an auxiliary electrode constituting an astigmatic element G.sub.AST is positioned. The auxiliary electrode G.sub.AST is connected during operation to means for applying a constant voltage, whilst at least the sub-electrode 28 forming part of the main lens is connected during operation to means for applying a control voltage. The control voltage may be a static voltage or a dynamically varying voltage, for example, a parabolic voltage which is in synchronism with the line deflection.

摘要翻译： 彩色显像管包括串联型电子枪5。 电子枪5包括由第一聚焦电极25和第二聚焦电极26构成的主透镜。第一聚焦电极包括彼此间隔一定距离放置的辅助电极27,28，辅助电极构成散光 元素GAST定位。 辅助电极GAST在操作期间连接到用于施加恒定电压的装置，而至少形成主透镜的一部分的副电极28在操作期间连接到施加控制电压的装置。 控制电压可以是静态电压或动态变化的电压，例如与线偏转同步的抛物线电压。