Electron gun assembly for a color cathode ray tube

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

1991-05-28

1992-11-10

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313414, H01J 2948

Patent

active

051626950

ABSTRACT:
In a electron gun assembly, three in-line electron beams are generated from three cathodes and are controlled and accelerated by a prefocusing electron lens, and each of the electron beams is converged by unipotential electron lens. In a horizontal plane, the electron beams are collimated by a quadruple lenses and are incident on a single and common large-diameter main electron lens. In a vertical plane, each of the electron beams is emerged as a divergent electron beam from the quadruple lens and each of the divergent electron beams is incident on the main electron lens. Thus, each of the electron beams are correctly focused on a screen and the three electron beams are correctly converged on a convergent point by the main electrode lens.

REFERENCES:
patent: 4528476 (1985-07-01), Alig
patent: 4772827 (1988-09-01), Osakabe

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