Focusing electrodes of an electron gun for use in a color televi

Details Focusing electrodes of an electron gun for use in a color televi Focusing electrodes of an electron gun for use in a color televi

1987-05-22

1989-05-02

DeMeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

H01J 2962

Patent

active

048271810

ABSTRACT:
The present invention relates to focusing electrodes of an electron gun for use in a color television cathode ray tube and, more particularly, to focusing electrodes, wherein a third focusing electrode is united with a long extension member, comprising an elongated tube, an attenuation tube and another elongated tube, to which the third focusing electorde is electrically connected and a fourth focusing electrode is united with a short extension member, comprising an elongated tube and an attenuation tube, to which the fourth focusing electrode is electrically connected.
The said improved structure is provided to reduce a local voltage difference as well as an influence from high potential field in the neck region so that a good convergence can be obtained and to offset an astigmatism so that a better picture on the screen can be provided.

REFERENCES:
patent: 4119884 (1978-10-01), Blumenberg

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