Color picture tube having reconvergence slots formed in a screen

Details Color picture tube having reconvergence slots formed in a screen Color picture tube having reconvergence slots formed in a screen

1983-01-27

1985-04-23

Demeo, Palmer

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313414, H01J 2951, H01J 2962

Patent

active

045132224

ABSTRACT:
An inline electron gun in a color picture tube is improved by the addition of two slots that are spaced sufficiently close to and inward from the two apertures in a portion of the screen grid electrode facing an accelerating and focusing electrode. The slots cause a distortion of the electrostatic field formed between the two electrodes at the two apertures. The field distortion compensates for an opposite distortion within the main lens of the electron gun.

REFERENCES:
patent: 3772554 (1973-11-01), Hughes
patent: 3873879 (1975-03-01), Hughes
patent: 4234814 (1980-11-01), Chen et al.
patent: 4318027 (1982-03-01), Hughes et al.
patent: 4449069 (1984-05-01), Assil et al.

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