MULTISTEP-TYPE FOCUSING ELECTRON GUN USING NON-SYMMETRICA LENS OF SIXTH GRID

摘要

The electron gun for improving the screen resolution includes a 6th lens (G6) on which three asymmetrical lens grooves (2) so that the electromagnetic field is formed along the grooves to control the electron beam asymmetically. The hole (3) is formed at the center of each groove for passing the electron beam. The asymmetrical groove may be formed to rectangular shape, elliptic shape which horizontal sides are straight, or vertical elliptic shape.