Electron gun and cathode-ray tube

Details Electron gun and cathode-ray tube Electron gun and cathode-ray tube

1991-01-30

1993-08-31

Issing, Gregory C.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

313414, 315 15, G09G 104, H01J 2958, H01J 2946, H01J 2950

Patent

active

052412377

ABSTRACT:
An electron gun in which at least two of a plurality of electrodes constituting the electron gun are endowed with structures for generating rotationally-asymmetric electric fields, in electron-beam apertures of the electrodes or around the electron-beam apertures, and a cathode-ray tube which comprises the electron gun can enhance focus characteristics and attain favorable resolutions over the whole area of a screen and in all the current ranges of electron beams, and they do not give rise to moire in the small current range of the electron beams, without supplying a dynamic focus voltage.

REFERENCES:
patent: 3887834 (1975-06-01), Himmelbauer
patent: 4641058 (1987-02-01), Koshigoe et al.
patent: 4764704 (1988-08-01), New et al.
patent: 4877998 (1989-10-01), Maninger et al.

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