Digital convergence system for a multi-gun CRT

Details Digital convergence system for a multi-gun CRT Digital convergence system for a multi-gun CRT

1977-03-18

1978-06-13

Hubler, Malcolm F.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Plural ray-type tube

315367, 315368, H01J 2951

Patent

active

040951375

ABSTRACT:
A convergence correction system is disclosed for digitally controlling the convergence correction signals applied to the convergence correction coils of a color CRT. The convergence correction signals correspond to a plurality of segments defined for the phosphor face of the CRT, so as to produce the convergence of the associated electron beams at the phosphor triads within the individual segments. The system provides for the independent adjustment of the convergence of each electron beam within each of the four quadrants of the phosphor face, independent of the adjustments for the convergence of the other electron beams. The system further provides for the use of only one convergence correction coil for each associated electron beam.

REFERENCES:
patent: 2742589 (1956-04-01), Goodrich
patent: 3114858 (1963-12-01), Schopp
patent: 3501669 (1970-03-01), Henderson
patent: 3631296 (1971-12-01), Collie, Jr.
patent: 3648097 (1972-03-01), Merryman
patent: 3740608 (1973-06-01), Manber et al.
patent: 3852640 (1974-12-01), McCarthy
patent: 3895252 (1975-07-01), Funakawa et al.

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