Electron gun for crt

An electron gun for a cathode ray tube, which is a transpose scan type cathode ray tube including an electron gun having three cathodes arranged vertically in line to generate three color (R.G.B) electron beams, and a deflection yoke having a coil for generating a substantially pincushion-shaped deflection field for deflecting the electron beams generated from the electron gun toward a short axis direction of the screen and a coil for generating a substantially barrel-shaped deflection field for deflecting the electron beams generated from the electron gun toward a long axis direction of the screen, the electron gun comprising:

• a cathode electrode;
• a control electrode for controlling a generation amount of the electron beans;
• an acceleration electrode;
• and
• a main lens stage having a main focusing electrode and an anode electrode,
• wherein the main focusing electrode is divided into at least three electrodes, and at least two electrodes of the divided three electrodes are respectively applied by a dynamic voltage, and the other electrode is applied by a constant voltage, and quadruple lens stages are formed in the confronting portions between the electrode applied by the constant voltage and the electrode applied by the dynamic voltage.

An electron gun for a cathode ray tube, which is a transpose scan type cathode ray tube including an electron gun having three cathodes arranged vertically in line to generate three color (R.G.B) electron beams, and a deflection yoke having a coil for generating a substantially pincushion-shaped deflection field for deflecting the electron beams generated from the electron gun toward a short axis direction of the screen and a coil for generating a substantially barrel-shaped deflection field for deflecting the electron beams generated from the electron gun toward a long axis direction of the screen, the electron gun comprising:

• a cathode electrode;
• a control electrode for controlling a generation amount of the electron beams;
• an acceleration electrode;
• a pre-focusing lens stage formed by pre-focusing electrodes;
• and
• a main lens stage having a main focusing electrode and an anode electrode;
• wherein the main focusing electrode is divided into at least three electrodes, and at least two electrodes of the divided three electrodes are respectively applied by a dynamic voltage, and the other electrode is applied by a constant voltage, and quadruple lens stages are formed in the confronting portions between the electrode applied by the constant voltage and the electrode applied by the dynamic voltage.