Cathode ray tube second electrode having rectangular projecting

Details Cathode ray tube second electrode having rectangular projecting Cathode ray tube second electrode having rectangular projecting

1975-02-27

1976-08-31

Segal, Robert

Electric lamp and discharge devices

Cathode ray tube

Ray generating or control

H01J 2946, H01J 2962

Patent

active

039783677

ABSTRACT:
A color television picture tube electron gun with an astigmatic lens element formed as an integral part of the second electrode. The astigmatic lens is a rectangularly configured ridge formed in the end closure surface of the second electrode, about a centralized circular aperture. The dimensions are selected to optimize the electron beam configuration impinging upon the screen of the picture tube with the beam being elongated a predetermined amount in the direction normal to the raster sweep direction.

REFERENCES:
patent: 3678320 (1972-07-01), Barten
patent: 3771002 (1973-11-01), Standaart
patent: 3772554 (1973-11-01), Hughes
patent: 3852608 (1974-12-01), Johanns et al.

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