公开(公告)号：EP0241218A3

公开(公告)日：1988-11-02

申请号：EP87302872

申请日：1987-04-02

申请人： MITSUBISHI DENKI KABUSHIKI KAISHA

发明人： Yamane, Hisakazu c/o Mitsubishi denki K.K. ,  Ishida, Ritsuo c/o Mitsubishi Denki K.K. ,  Nakanishi, Hisao c/o Mitsubishi Denki K.K. ,  Yanai, Keiji c/o Mitsubishi Denki K.K. ,  Kimura, Kenji c/o Mitsubishi Denki K.K. ,  Ishibata, Koji c/o Mitsubishi Denki K.K. ,  Ishii, Yoshinori c/o Mitsubishi Denki K.K. ,  Toshiyasu, Masayuki c/o Mitsubishi Denki K.K. ,  Okuda, Souitirou c/o Mitsubishi Denki K.K. ,  Ikegami, Kazunori c/o Mitsubishi Denki K.K.

IPC分类号： H01J29/50 ,  H01J29/62

CPC分类号： H01J29/503 ,  H01J2229/4841 ,  H01J2229/4862 ,  H01J2229/4872 ,  H01J2229/4875 ,  H01J2229/4879 ,  H01J2229/4896

摘要： A cathode ray tube apparatus comprises three cathodes (1) arranged in line with each other in a first direction for emission of respective electron beams (20) therefrom, a focusing electrode (4) having first to third apertures defined therein for the passage of the respective electron beams therethrough, and a quadrupole electrode structure including first to third quadrupole electrodes (17,18,19) one for each electron beam. Each of the quadrupole electrodes (17,18,19) comprises a pair of horizontal electrode pieces (17a,b;18a,b;19a,b) spaced a predetermined distance from each other in a second direction perpendicular to the first direction and positioned upwardly and downwardly, respectively, with respect to the associated electron beam, and a pair of vertical electrode pieces (17c,d;18c,d;19c,d) spaced a predetermined distance from each other in a direction aligned with the first direction and positioned leftwards and rightwards with respect to such associated electron beam. A power source circuit is included for applying a predetermined voltage to the quadrupole electrode structure.