Cathode-ray tube apparatus

A cathode-ray tube apparatus comprising:

• an electron gun assembly including an electron beam generating section which generates an electron beam, and a main lens section which focus an electron beam generated from the electron beam generating section onto a phosphor screen;
• and
• a deflection yoke which generates deflection magnetic fields for deflecting and scanning the electron beam emitted from the electron gun assembly in a horizontal direction and a vertical direction,
• wherein the electron gun assembly includes a focus electrode supplied with a focus voltage of a first level and constituting a part of the main lens section, a first dynamic focus electrode supplied with a dynamic focus voltage obtained by superimposing an AC component, which varies in synchronism with the deflection magnetic fields, upon a reference voltage close to the first level, and constituting a part of the main lens section, a second dynamic focus electrode supplied with said dynamic focus voltage and disposed in a front stage of the main lens section, and an anode supplied with an anode voltage with a second level higher than said first level,
• at least two auxiliary electrodes are disposed adjacent to the second dynamic focus electrode,
• said at least two auxiliary electrodes are connected via a resistor disposed near the electron gun assembly, and
• the focus electrode and the first dynamic focus electrode are disposed adjacent to each other.