Color cathode ray tube

Details Color cathode ray tube Color cathode ray tube

1988-09-02

1989-09-26

Yusko, Donald J.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313428, H01J 2951

Patent

active

048703214

ABSTRACT:
In an electron gun assembly for a cathode ray tube, the center and side electron beams emitted from cathodes are incident on a main electric lens. The center and side electron beams are focused, respectively. The side beams are over-converged and directed to an over-converged point by the main electric lens. The side beams emerged from the main electric lens are deflected and corrected by a divergent lens so that the center and side beams are converged on a proper converged point between the screen and the over-converged point.

REFERENCES:
patent: 3448316 (1969-06-01), Yoshida et al.
patent: 4086513 (1978-04-01), Evans
patent: 4350923 (1982-09-01), Hughes
patent: 4528476 (1985-07-01), Alig
Electronic Design, vol. 31, No. 7, 31st Mar. 1983, pp. 38-39, Waseca, Minn., Denville, N.J., U.S.; V. Biancomano: "Color Tube Retains Focusing Accuracy Despite Small Yoke".

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