Cathode-ray tube

Details Cathode-ray tube Cathode-ray tube

1980-11-17

1982-11-09

Segal, Robert

Electric lamp and discharge devices

Cathode ray tube

Ray generating or control

313460, H01J 2956, H01J 2946

Patent

active

043587038

ABSTRACT:
By making the first grid of an electron gun for a cathode-ray tube to extend in the manner of a funnel in such manner that on the side of the second grid the aperture is elongate and mainly a quadrupole lens action is obtained, it is possible to obtain in the corners and at the edge of the display screen a spot which is surrounded by considerably less haze than the known construction having an elongate aperture in the first grid.

REFERENCES:
patent: 3497763 (1970-02-01), Hasker
patent: 3852608 (1974-12-01), Johanns et al.
patent: 4143293 (1979-03-01), Hosokoshi et al.

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