Electron gun for color cathode ray tube

An electron gun for a color cathode ray tube, the electron gun, comprising:

• a cathode emitting an electron beam;
• a control electrode having first hole regions, each one of the first hole regions including a first vertically elongated indented portion formed at an output side surface of said control electrode and including a first hole portion formed in the first vertically elongated indented portion, the electron beam passing through said control electrode;
• a screen electrode installed adjacent to said control electrode, said screen electrode having second hole regions;
• and
• a plurality of focusing electrodes sequentially installed from said screen electrode;
• each one of the second hole regions including a second indented portion formed at an output side surface of said screen electrode and a second hole portion formed in the second indented portion, the electron beam passing through the second hole portion.

An electron gun for a color cathode ray tube, the electron gun comprising:

• a cathode emitting an electron beam;
• a control electrode having first hole regions, each one of the first hole regions including a first vertically elongated indented portion formed at an output side surface of said control electrode and including a first hole portion formed in the first vertically elongated indented portion, the electron beam passing through said control electrode;
• a screen electrode installed adjacent to said control electrode, said screen electrode having second hole regions;
• and
• a plurality of focusing electrodes sequentially installed from said screen electrode, each one of the second hole regions including a second indented portion formed at an output side surface of said screen electrode and a second hole portion formed in the second indented portion, the electron beam passing through the second hole portion.

An electron gun for a color cathode ray tube, the electron gun comprising:

• a cathode emitting an electron beam;
• a control electrode having first hole regions, each one of the first hole regions including a first vertically elongated indented portion formed at an output side surface of said control electrode and including a first hole portion formed in the first vertically elongated indented portion, the electron beam passing through said control electrode, the first hole portion having one shape selected from among elongated and square;
• a screen electrode installed adjacent to said control electrode, said screen electrode having second hole regions;
• and
• a plurality of focusing electrodes forming a plurality of quadrupole lenses, said focusing electrodes being sequentially installed from said screen electrode and respectively forming electron beam passing holes having a predetermined shape.

An electron gun for a color cathode ray tube, the electron gun comprising:

• a cathode emitting an electron beam;
• a control electrode having first hole regions, each one of the first hole regions including a first vertically elongated indented portion formed at an output side surface of said control electrode and including a first hole portion formed in the first vertically elongated indented portion, the electron beam passing through said control electrode;
• a screen electrode installed adjacent to said control electrode, said screen electrode having second hole regions;
• and
• a plurality of focusing electrodes forming a plurality of quadrupole lenses, said focusing electrodes being sequentially installed from said screen electrode and respectively forming electron beam passing holes having a predetermined shape, said focusing electrodes comprising:
• first, second, and third focusing electrodes, respectively having electron beam passing holes forming a predetermined shape;
• a fourth focusing electrode installed adjacent to said third focusing electrode, said fourth focusing electrode forming a first quadrupole lens;
• and
• a fifth focusing electrode installed adjacent to said fourth focusing electrode, said fifth focusing electrode forming a second quadrupole lens.

An electron gun for a color cathode ray tube, the electron gun comprising:

• a cathode emitting an electron beam;
• a control electrode having first hole regions, each one of the first hole regions including a first vertically elongated indented portion formed at an output side surface of said control electrode and including a first hole portion formed in the first vertically elongated indented portion, the electron beam passing through said control electrode, the first hole portion having a square shape;
• a screen electrode installed adjacent to said control electrode, said screen electrode having second hole regions;
• and
• a plurality of focusing electrodes sequentially installed from said screen electrode, said plurality of focusing electrodes including a final acceleration electrode forming a main lens of the electron gun.

An electron gun for a color cathode ray tube, the electron gun comprising:

• a cathode emitting an electron beam;
• a control electrode having first hole regions, each one of the first hole regions including a first elongated indented portion formed at an output side surface of said control electrode and including a first hole portion formed in the first elongated indented portion, the electron beam passing through said control electrode;
• a screen electrode installed adjacent to said control electrode, said screen electrode having second hole regions;
• and
• a first plurality of focusing electrodes forming a plurality of quadrupole lenses, said first plurality of focusing electrodes being sequentially installed from said screen electrode and respectively forming electron beam passing holes, said first plurality of focusing electrodes comprising:
• a second plurality of focusing electrodes, respectively having electron beam passing holes;
• an additional focusing electrode installed adjacent to said second plurality of focusing electrodes, said additional focusing electrode forming a first quadrupole lens;
• and
• a next focusing electrode installed adjacent to said additional focusing electrode, said next focusing electrode forming a second quadrupole lens.

An apparatus emitting electron beams, the apparatus comprising:

• at least two cathodes emitting electron beams, said at least two cathodes being arranged substantially in a horizontal line;
• a control electrode having first hole regions, each one of the first hole regions including a first vertically elongated indented portion formed at an output side surface of said control electrode and including a first hole portion formed in the first vertically elongated indented portion, at least one of the electron beams passing through said control electrode;
• and
• a screen electrode installed adjacent to said control electrode, said screen electrode having second hole regions, each one of the second hole regions including a second indented portion formed at an output side surface of said screen electrode and a second hole portion formed in the second indented portion, at least one of the electron beams passing through the second hole portion.