Correction factor signals for cathode ray tubes

Details Correction factor signals for cathode ray tubes Correction factor signals for cathode ray tubes

1978-09-08

1980-05-13

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315 13C, H01J 2970, H01J 2976

Patent

active

042030544

ABSTRACT:
A method of convergence correction in a three beam color cathode ray tube dividing the screen into a plurality of discrete areas. Digital values for convergence factor signals are derived for a predetermined number of the discrete areas and a spreading algorithm is used to derive digital values for the remaining areas. The resulting digital values are stored in a digital store and used to provide convergence correction factor signals during operation of the tube.

REFERENCES:
patent: 4095137 (1978-06-01), Oswald
patent: 4099092 (1978-07-01), Bristow
patent: 4104566 (1978-08-01), Shah

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