Digital convergence circuit storing coefficients of fundamental

Details Digital convergence circuit storing coefficients of fundamental Digital convergence circuit storing coefficients of fundamental

1988-02-29

1989-09-26

Tarcza, Thomas H.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315368, H01J 2970, H01J 2972

Patent

active

048703290

ABSTRACT:
A digital conversion circuit with a convergence deviation correcting circuit. A coefficient storing circuit stores coefficients of fundamental correction waves. By weighting these fundamental correction waves using the coefficient storing circuit, a correction data storing circuit is provided with correcting data. Controlling means controls this entire operation. Using the correction data, the convergent deviation of a scanning line of a scanning picture is corrected. By weighting each fundamental correction wave with a weighting coefficient, a synthesized wave is produced. This synthesized correction data is read from a correction data storing circuit in synchronism with deflection scanning and is supplied to a convergence deviation correcting circuit.

REFERENCES:
patent: 4203054 (1980-05-01), Sowter
patent: 4754204 (1988-06-01), Ando et al.

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