Color television display device comprising a deflection coil uni

Details Color television display device comprising a deflection coil uni Color television display device comprising a deflection coil uni

1979-06-25

1980-11-11

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315 13C, 315402, H01J 2970, H01J 2976

Patent

active

042335477

ABSTRACT:
A color television display device comprising a deflection coil unit with a deflection coil for the vertical deflection which coil is divided into two coil halves. A balancing resistor by means of which the convergence can be corrected is in a parallel branch. A static convergence error introduced by this resistor owing to the non-zero inductance of the deflection coil is corrected by means for decreasing the voltage present across the balancing resistor during the trace period of the deflection current by a direct voltage in such a way that the voltage across the resistor is more decreased after the center instant of the trace period than before and that the correction current at and about said center instant is substantially zero. (FIG. 3).

REFERENCES:
patent: 3803444 (1974-04-01), Gerritsen et al.

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