Beam index color cathode ray tube

Details Beam index color cathode ray tube Beam index color cathode ray tube

1981-01-05

1982-03-30

Segal, Robert

Electric lamp and discharge devices

Cathode ray tube

Screen

313449, H01J 2956, H01J 2934, H01J 2946

Patent

active

043226558

ABSTRACT:
A beam index color cathode ray tube is provided with a screen arranged on the inner surface of a face plate portion and an electron gun arranged in a neck portion thereof. This screen comprises phosphor stripes and index stripes. The electron gun comprises at least a cathode and two electrodes forming a focusing lens. The focusing lens of the electron gun is formed between at least two electrodes provided with transversely elongate openings having their direction of elongation in the width direction of the phosphor stripes or index stripes.

REFERENCES:
patent: 2859378 (1958-11-01), Gundert et al.
patent: 2884559 (1959-04-01), Cooper et al.
patent: 3866081 (1975-02-01), Hasker et al.
patent: 3919583 (1975-11-01), Hasker et al.
patent: 3952224 (1976-04-01), Evans
patent: 4142128 (1979-02-01), Odenthal
patent: 4143293 (1979-03-01), Hosokoshi et al.

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