公开(公告)号：US5055736A

公开(公告)日：1991-10-08

申请号：US502127

申请日：1990-03-30

申请人： Joyung Yun ,  Hojin Cho

发明人： Joyung Yun ,  Hojin Cho

IPC分类号： H01J29/07

CPC分类号： H01J29/076

摘要： A shadow mask for use in a three-gun color picture tube comprising a number of electron beam transmission holes, the length of the bridge portion between two vertically adjacent ones of said electron beam transmission holes being constant, the vertical pitch of said electron beam transmission holes being varied between Py+.DELTA.x and Py-.DELTA.x so as to reduce moire effect, .DELTA.x being obtained from the following formula when n=3, 4: ##EQU1## wherein Py is the vertical pitch of the electron beam transmission holes of a shadow mask, Ps the pitch of scanning lines, fa the pitch frequency of the shadow mask, and fs the scanning frequency.

摘要翻译： 一种用于三枪彩色显像管的荫罩，包括多个电子束透射孔，两个垂直相邻的电子束透射孔之间的桥接部分的长度恒定，所述电子束透射的垂直间距 在Py + DELTA x和Py-DELTA x之间改变空穴以减少莫尔效应，当n = 3,4时，由以下公式获得的DELTA x：其中Py是电子束透射孔的垂直间距 荫罩，扫描线的间距，荫罩的俯仰频率，fs扫描频率。