Cathode ray tube apparatus

Details Cathode ray tube apparatus Cathode ray tube apparatus

1977-12-13

1980-05-13

Hubler, Malcolm F.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Plural ray-type tube

315367, 315368, 315370, H01J 2970

Patent

active

042030510

ABSTRACT:
A three color gun cathode ray tube has convergence correction signals derived from digital signals stored in a digital data store. The screen of the tube is divided into a plurality of areas and a digital correction signal derived for each area. The system is arranged so that when the three beams are scanning a particular area the digital correction signal associated with that area is read out from the digital store, passed through a digital to analog converter and then applied to the convergence coils of the tube.

REFERENCES:
patent: 3422304 (1969-01-01), Thorpe
patent: 3435278 (1969-03-01), Carlock et al.
patent: 3465137 (1969-09-01), Brouillette, Jr. et al.
patent: 3501669 (1970-03-01), Henderson
patent: 3714496 (1973-01-01), Horvath
patent: 3852640 (1974-12-01), McCarthy
patent: 3943279 (1976-03-01), Austefjord
patent: 4095137 (1978-06-01), Oswald
patent: 4099092 (1978-07-01), Bristow
patent: 4104566 (1978-08-01), Shah

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