| 摘要 |
Picture display device comprising a magnetic field compensation circuit for generating a compensation current through a winding surrounding the display tube. A rotational error caused by external magnetic fields is eliminated thereby. For correcting deflection errors (rotational and trapezium errors) which are caused by the display tube or by the deflection coil, or by the combination of both, the picture display device also comprises a correction circuit for generating adjustable correction currents which flow through the same compensation winding. |
