Patent ID: 6586868
Filing Date: 2003-07-01
Classification: H01J

Abstract:
A color cathode-ray tube apparatus having an electron gun structure forming a plurality of electron lenses including a main lens for focusing electron beams on a phosphor screen, and a deflection yoke for horizontally and vertically deflecting the electron beams emitted from the electron gun structure,wherein the electron gun structure comprises: a focus electrode, an ultimate acceleration electrode and at least one intermediate electrode disposed between the focus electrode and the ultimate acceleration electrode, the focus electrode, the ultimate acceleration electrode and said at least one intermediate electron forming said main lens; a voltage application device configured to apply to the focus electrode a dynamic voltage increasing in accordance with an increase in a degree of deflection of electron beams, and to apply to the intermediate electrode a voltage obtained by dividing a voltage applied to the ultimate acceleration electrode by means of a voltage dividing resistor; and at least one additional electrode electrically insulatively covering at least a part of an outer surface of a cylindrical electrode constituting the electron lens, said at least one additional electrode being electrically connected to the intermediate electrode.