KR970071962A - Electron gun for color cathode ray tube - Google Patents

Abstract

The present invention relates to an electron gun for a color cathode ray tube, and more particularly, to an electron gun for a color cathode ray tube.

To this end, a plurality of grid electrodes are successively arranged from the three cathodes 1 in the tube axis direction to form an electron beam forming region, a prefocus lens 15, and an asymmetric full-body in-focus lens, and a static focus electrode and a dynamic focus And an electrostatic quadrupole lens 32 is formed by providing an electrode having asymmetric electron beam passing holes between the electrodes. The fourth grid electrode 9, which is independent of the mutual insulation between the stacked focus electrode and the dynamic focus electrode, And a first electrode 25 having a long electron beam passage hole 23 formed in a direction perpendicular to the surface of the static focus electrode is disposed at a position A second electrode 26 having a long electron beam passage hole 24 formed in a horizontal direction is disposed on the opposite surface of the dynamic focus electrode, The fourth grid electrode 9 is positioned so that mutual insulation is maintained between the tick focus electrode and the dynamic focus electrode so that the same voltage as the final electrode of the electron beam forming region is applied to the fourth grid electrode, And a first electrode 25 having a long electron beam passage hole 23 formed in a vertical direction is disposed on the surface of the dynamic focus electrode .

Description

Electron gun for color cathode ray tube

Since this is a trivial issue, I did not include the contents of the text.

FIG. 2 (A) and FIG. 2 (B) are explanatory diagrams showing the horizontal and vertical deflection magnetic fields constituting the self-convergence magnetic field, FIG. (A) and (b) of FIG. 4 show electron beam spots at respective screen points of a conventional color cathode-ray tube are respectively referred to as 5 is an optical schematic view for explaining an electron beam deformation of a conventional single- and multi-stage focusing electron gun, and Fig. 6 is a longitudinal sectional view showing the present invention. Fig.

Claims (6)

A plurality of grid electrodes are sequentially arranged from the three cathodes in the tube axis direction to form an electron beam forming area, a prefocus lens, and an asymmetric main electrostatic focusing lens, and an asymmetric electron beam passing hole is provided between the static focus electrode and the dynamic focus electrode And the fourth grid electrode is disposed so as to maintain mutual insulation between the scan focus electrode and the dynamic focus electrode, and the fourth grid electrode is positioned between the last focus electrode and the dynamic focus electrode, And a second electrode having a long electron beam passage hole formed in a horizontal direction on the opposite surface of the dynamic focus electrode is positioned on the opposite side of the static focus electrode, The electron gun for color cathode ray tube constructed by The electron gun for a color cathode-ray tube according to claim 1, wherein the electron beam passage holes of the first and second electrodes provided on the opposite surfaces of the static focus electrode and the dynamic focus electrode are elliptical. The electron gun for a color cathode-ray tube according to claim 1, wherein the electron beam passage holes of the first and second electrodes provided on the opposing surfaces of the static focus electrode and the dynamic focus electrode are a straight line and an arc. A plurality of grid electrodes are sequentially arranged from the three cathodes in the tube axis direction to form an electron beam forming area, a prefocus lens, and an asymmetric main electrostatic focusing lens, and an asymmetric electron beam passing hole is provided between the static focus electrode and the dynamic focus electrode Wherein the fourth grid electrode is positioned so that mutual insulation between the static focus electrode and the dynamic focus electrode is maintained and the final electrode of the electron beam forming region is formed in the fourth grid electrode, A second electrode having a long electron beam passage hole formed in a horizontal direction on a surface of the static focus electrode, and a first electrode having a long electron beam passage hole formed in a vertical direction on the dynamic focus electrode. 5. The electron gun for a color cathode-ray tube according to claim 4, wherein the electron beam passing holes of the first and second electrodes provided on the opposite surfaces of the static focus electrode and the dynamic focus electrode are elliptical. 5. The electron gun for a color cathode-ray tube according to claim 4, wherein the electron beam passage holes of the first and second electrodes provided on the opposite surfaces of the static focus electrode and the dynamic focus electrode are a straight line and an arc. ※ Note: It is disclosed by the contents of the first application.