Abstract: A plate-shaped ground plate formed from a copper material, the ground plate includes: an outline frame; a plurality of horizontal ribs connecting the left and right inner peripheral surfaces of the outline frame and distanced from one another in the vertical direction; vertical ribs connecting between the outline frame and the horizontal ribs and between the plurality of horizontal ribs, respectively; and needle-shaped protrusions in the form of a branch which protrude outward on the outer peripheral surfaces of the horizontal ribs.

Abstract: A plate-shaped ground plate formed from a copper material, the ground plate includes: an outline frame; a plurality of horizontal ribs connecting the left and right inner peripheral surfaces of the outline frame and distanced from one another in the vertical direction; vertical ribs connecting between the outline frame and the horizontal ribs and between the plurality of horizontal ribs, respectively; and needle-shaped protrusions in the form of a branch which protrude outward on the outer peripheral surfaces of the horizontal ribs.

Abstract: The present invention relates in general to a cathode ray tube, more particularly, to a structure of an electron gun for enhancing resolution of a cathode ray tube. The structure of an electron gun for a cathode ray tube of the invention is effective for enhancing the resolution of the screen without an application of a dynamic voltage.

Abstract: A cathode ray tube with a reduced beam spot size on a fluorescent screen is obtained by forming electron beam passing holes on the electrodes composing a triode portion of an electron gun to have horizontally and vertically asymmetric shapes.

Abstract: A cathode ray tube with a reduced beam spot size on a fluorescent screen is obtained by forming electron beam passing holes on the electrodes composing a triode portion of an electron gun to have horizontally and vertically asymmetric shapes.

Abstract: Electron gun in a color cathode ray tube including a separate plate electrode having a thickness thicker than a focusing electrode or an anode, a smooth outer circumference of a rim part, and single electron beam pass through hole for passing of three electron beam in common each fitted to opposite edges of the focusing electrode and the anode, thereby preventing deformation of the plate electrodes, enlarging diameters of the electron beam pass through holes, to allow formation of accurate large sized main focusing electrostatic lens, improving focusing onto a screen, and preventing occurrence of discharge between the focusing electrode and the anode.