Raster distortion correcting circuit

Details Raster distortion correcting circuit Raster distortion correcting circuit

1974-08-23

1976-07-06

Wilbur, Maynard R.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315400, H01J 2956

Patent

active

039684024

ABSTRACT:
Side, or left and right pin-cushion distortions in the raster of a cathode ray tube, for example, of a color television receiver having an in-line arrangement of its electron beams, are corrected by connecting the horizontal deflection winding of the cathode ray tube, the collector-emitter path of a transistor and the output winding of a saturable reactor, in series, to a power supply source, and by applying to the base or control electrode of the transistor and to the input winding of the saturable reactor a correction signal having a parabolic waveform of the vertical scanning rate or frequency so that correction of the side pin-cushion distortions is effected satisfactorily at all portions of the raster.

REFERENCES:
patent: 3571653 (1971-03-01), Hansen
patent: 3648099 (1972-03-01), Otten
patent: 3814982 (1974-06-01), Sakurai et al.

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