Electron gun for a color cathode-ray tube

Details Electron gun for a color cathode-ray tube Electron gun for a color cathode-ray tube

1994-09-26

1996-07-02

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313412, 313432, 313460, 315382, 31536815, H01J 2958

Patent

active

055325475

ABSTRACT:
An electron gun for a color cathode-ray tube, adapted for large television sets or high-definition monitors, has first and second quadrupole electrodes connected to a static voltage focus electrode and to a dynamic voltage focus electrode, respectively, to form a quadrupole lens. The first quadrupole electrode is composed of first electrode pieces connected to the static voltage focus electrode and arranged on left and right sides of three beam-passing apertures formed on the static voltage focus electrode, and each of the first electrode pieces has at least one arc having a radius identical to or larger than that of the beam-passing apertures. The second quadrupole electrode is composed of second electrode pieces connected to upper and lower portions of the dynamic voltage focus electrode, and each of the second electrode pieces has arcs having a radius identical or larger than that of the beam-passing apertures. The first electrode pieces are inserted inside of the second electrode pieces.

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