Color cathode ray tube in-line electron gun focusing electrode w

Details Color cathode ray tube in-line electron gun focusing electrode w Color cathode ray tube in-line electron gun focusing electrode w

1984-12-12

1987-04-07

Moore, David K.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

H01J 2962

Patent

active

046563911

ABSTRACT:
In a color cathode ray tube having an in-line electron gun with overlapping CFF lenses, the small openings of the focusing electrode apertures are critically enlarged to balance the asymmetry of the lensing field caused by the overlap, and beam spot distortion due to field asymmetries in the focus region is eliminated. Enlargement is achieved by elongating the openings in a direction normal to the in-line plane, and widening the outer openings.

REFERENCES:
patent: 4517488 (1985-05-01), Say
patent: 4535266 (1985-08-01), Say
patent: 4542318 (1985-09-01), Say

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