Electron gun structure

Details Electron gun structure Electron gun structure

1979-10-17

1982-06-08

Karlsen, Ernest F.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313449, 315 15, H01J 2956, H01J 2946

Patent

active

043341691

ABSTRACT:
An electron gun comprises cathodes for emitting three electron beams, and grid electrodes forming at least two asymmetric electrostatic lenses along three electron gun axes. The lenses focus and deflect the electron beams to converge on a color cathode ray tube screen. The first asymmetric lens, in response to the focus voltage being varied, deflects the beam at a first angle and the second asymmetric lens deflects the beam at a second angle to compensate for the first angle deflection caused by the first asymmetric lens.

REFERENCES:
patent: 2957106 (1960-10-01), Moodey
patent: 3772554 (1973-11-01), Hughes
patent: 4124810 (1978-11-01), Bortfeld et al.

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