Abstract: An electron gun for a cathode ray tube is formed such that the spacing between the electron beam passing holes in a static focus electrode is longer than that between the electron beam passing holes in a dynamic focus electrode which forms a dynamic quadrupole lens with the static focus electrode, thereby enhancing the focusing and convergence characteristics of electron beams.

Abstract: A dynamic focus electron gun includes a tripolar section for releasing and initially forming electron beams; a focus electrode and a dynamic electrode for pre-accelerating and for prefocusing the electron beams; and an anode for finally accelerating and focusing the electron beams wherein vertical and horizontal blades for forming quadrupole lenses at the respective beam passing holes of the focus electrode and the dynamic electrode are installed within the electrodes. According to the electron gun of the present invention, there is no expectation that arcing might occur between the electrodes, and the voltage resistance characteristics and ease of assembly are improved.