Color television display device comprising a deflection coil unit provided with a deflection coil for the vertical deflection and deflection coil unit for such a display device

摘要

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).