Electrode of electron gun and electron gun using the same

An electron gun for a cathode ray tube, the electron gun a cathode, a control electrode and a screen electrode together constituting a triode section;

• and
• focusing electrodes installed adjacent to the screen electrode and forming at least one electronic lens;
• wherein each of the focusing electrodes comprises:
• an outer-rim electrode having a large electron beam passing hole through which three electron beams pass;
• and
• an inner electrode installed inside the outer-rim electrode member, and having three electron beam passing holes disposed in an in-line arrangement and recesses formed at peripheries of the electron beam passing holes, the recesses having an eccentricity distance larger than an eccentricity distance of the electron beam passing holes.

An electrode of an electron gun for a color cathode ray tube, said electrode comprising:

• a larger electron beam passing hole through which three electron beams pass;
• and
• three smaller electron beam passing holes disposed in an in-line arrangement and in alignment with the larger-diameter electron beam passing hole to allow each of the electron beams to pass through one of said smaller electron beam passing holes;
• wherein
• each of said smaller electron beam passing holes has, as seen along a propagation path of the respective electron beam, a first section aperture telescopically arranged inside a second section aperture;
• and
• a distance between centers of the first section apertures of adjacent said smaller electron beam passing holes is smaller than a distance between centers of the respective second section apertures.