| 摘要 |
PURPOSE:To stabilize an electric field distribution of an electron gun by preparing an electroconductive film on spacer surfaces facing linear negative electrodes in the position in which a rear electrode is insulated from vertical focusing electrodes. CONSTITUTION:While spacers 2 in an electron gun of an image display unit keep the distance between a rear electrode 1, in which a transparent electroconductive film 1a is formed on one side, and vertical focusing electrodes 4 to be constant, charging by electron beams, released from the linear negative electrodes 3 is kept uniform with the transparent electroconductive films 2a in order to uniformize the electric field being composed in an electron gun. The transparent electroconductive films 2a are formed on spacer surfaces in the position in which the rear electrode 1 is insulated from the vertical focusing electrodes 4. Together with insulating the rear electrode 1 from the vertical focusing electrodes 4, the electroconductive films can be formed all over the surfaces of the spacers 2. Therefore, stabilization as the composition of the electron gun can be realized and irregularity of brightness in the image display unit can be removed, with improvement and stabilization of picture quality being realized. |
