Side pincushion correction circuit

Details Side pincushion correction circuit Side pincushion correction circuit

1979-04-06

1980-09-30

Hubler, Malcolm F.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315408, H01J 2970

Patent

active

042258090

ABSTRACT:
A side pincushion distortion correction circuit has an impedance circuit connected in series with the deflection coil in a television receiver. A controllable switch connected in parallel with the impedance circuit is operated by a switching signal, the phase of which is modulated by a combination of a parabolic signal at the vertical rate and a control signal corresponding to the brightness of a reproduced picture on the screen of the television receiver in order to maintain proper correction of side pincushion distortion despite variations in the brightness of a picture reproduced on the cathode ray tube of the television receiver.

REFERENCES:
patent: 4042858 (1977-08-01), Collette et al.
patent: 4088931 (1978-05-01), Haferl
patent: 4101814 (1978-07-01), Haferl
patent: 4118656 (1978-10-01), Dietz

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