| 摘要 |
PURPOSE:To easily adjust distortion of a picture generated in horizontal and vertical deflection coils with accuracy. CONSTITUTION:A vertical deflection current correction circuit 12 corrects a vertical deflection current so that magnetic fields of vertical deflection coils 22a, 22b are shifted corresponding to a first control signal from a control circuit 11 in the direction of pin-cushion magnetic field. A vertical parabolic current generating circuit 13 supplies a vertical parabolic current correcting horizontal convergence displacement to correction coils 23a, 23b corresponding to a second control signal from the control circuit 11. A horizontal and vertical parabolic current generating circuit 14 outputs first and second horizontal and vertical parabolic currents correcting each vertical displacement between electron beams R, G and between electron beams G, B to correction coils 24a, 24b corresponding to a third control signal from the control circuit 11. Consequently, distortion of a picture generated in horizontal and vertical deflection coils can be easily adjusted with accuracy. |
