Abstract: An electron gun for a color CRT includes a triode including cathodes for emitting electron beams, a control electrode, and a screen electrode, at least two focusing electrodes on the same axis of the triode portion for forming a quadrupole lens, and a final focusing electrode forming a large diameter lens with the focusing electrodes and through which three electron beams commonly pass. The electron gun includes a correction unit producing a correction force acting on the three electron beams and that is larger for two side electron beams than for a central electron beam of the three electron beams when a dynamic voltage, synchronized with a deflection signal, is applied to at least one of the focusing electrodes for forming the quadrupole lens.

Abstract: A color CRT is driven by focusing and accelerating an electron beam emitted from a cathode by forming electron lenses including a quadrupole lens by applying a predetermined voltage to the cathode of an electron gun installed in a neck portion of a funnel and each of electrodes, focusing the electron beam on a fluorescent film by applying a voltage having a horizontal dynamic waveform having a ratio of slopes of 6.85 or more between a unilateral area of 90% and a unilateral area of 50% of a raster area to which a video signal of an image is applied, to at least one of the electrodes forming the quadrupole lens, synchronized with a horizontal deflection signal of a deflection yoke installed at a cone portion of the funnel, in order to deflect an electron beam emitted from the electron gun and scan the deflected electron beam onto the fluorescent film of a panel sealed to the funnel, and forming an image by having the deflected electron beam land on the fluorescent film and excite the fluorescent film.

Abstract: A color CRT is driven by focusing and accelerating an electron beam emitted from a cathode by forming a plurality of electron lens including a quadrupole lens by applying a predetermined voltage to the cathode of an electron gun installed at a neck portion of a funnel and each of electrodes, focusing the electron beam on a fluorescent film by applying a voltage having a horizontal dynamic waveform having a ratio of slopes of 6.

Abstract: An electron gun for a cathode ray tube includes a triode having cathodes, a first grid and a second grid, one or more third grids through which electron beams emitted from the cathode pass, a fourth grid opposing the third grids and forming a main focus lens with the third grid, a shield cup connected to the fourth grid and supplying a high voltage to the fourth grid, and a correction grid disposed between the fourth grid and the shield cup and having R, G, and B beam through holes arranged along a line. The R and B beam through holes have openings with asymmetrical shapes that are symmetrical with respect to each other and relative to the straight line, balancing astigmatisms and improving resolution.

Abstract: An electron gun for a color cathode ray tube is provided. The electron gun includes cathodes, a control electrode and a screen electrode, forming a triode, first, second, third and fourth focusing electrodes, sequentially installed from the screen electrode and forming at least one first quadrupole lens, fifth and sixth focusing electrodes, installed adjacent to the fourth focusing electrode and forming at least one second quadrupole lens, and a final accelerating electrode, installed adjacent to the sixth focusing electrode and forming a main lens.

Abstract: An electrode of an electron gun for a cathode ray tube with an improved structure so as to enhance the flatness of the electrode. The electrode includes an electron beam passing plane on which one or more electron beam passing holes are formed, an upper sloping portion of a truncated cone shape, slantingly extending downward and outward from the peripheral edges of the electron beam passing plane, and a vertically extending portion of a cylindrical shape, extending downward from the lower portion of the upper sloping portion and extending substantially perpendicular to the electron beam passing plane.

Abstract: A socket for interconnecting first and second lead pins fixed to a neck portion of a CRT at an array angle and to which a high voltage and a low voltage are applied, respectively, and a socket board including signal lines having an array angle different from that of the second lead pins, the socket including connector pins each having a pin holder portion connected to the second lead pin, an outer pin portion connected to the signal line, and an extension portion connecting the pin holder portion to the outer pin portion, and a socket main body to which the connector pins are fixed, wherein the array angle between the outer pin portions is the same as that between the signal lines.

Abstract: An electron gun for a color cathode ray tube includes cathodes, a control electrode and a screen electrode which form a front triode, first, second, third, fourth and fifth focus electrodes which form a plurality of auxiliary electrostatic lenses, and a final accelerating electrode installed adjacent to the fifth focus electrode to form a main electrostatic lens, wherein vertically-elongated electron beam passing holes are formed on the fourth focus electrode, a predetermined focus voltage is applied to the first, second and fifth focus electrodes, a dynamic focus voltage lower than the focus voltage and synchronized with a deflection synchronizing signal is applied to the fourth focus electrode, a static voltage higher than the focus voltage is applied to the second focus electrode, and an anode voltage higher than the focus voltage is applied to the final accelerating electrode.