Display system utilizing beam shape correction

Details Display system utilizing beam shape correction Display system utilizing beam shape correction

1974-10-04

1976-10-05

Segal, Robert

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313413, H01J 2951, H01J 3120

Patent

active

039847233

ABSTRACT:
A color picture reproducing tube utilizes three coplanar electron beams. Convergence of the three beams along at least one axis is accomplished by a deflection assembly producing a magnetic deflection field with particular astigmatism characteristics which also elliptically distorts each of the three beams in a first direction. The electron gun assembly within the picture tube includes apertured electrodes which predistort the beams elliptically in a second direction orthogonal to the first direction of distortion.

REFERENCES:
patent: 3579010 (1971-05-01), Jones
patent: 3603839 (1971-09-01), Takayanagi
patent: 3772554 (1973-11-01), Hughes
patent: 3800176 (1974-03-01), Gross et al.
B381,074, Jan. 1975, Hasket et al., 313/414 X.

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