| 摘要 |
PURPOSE:To make distortion corrections by flowing all of the primary current of a flyback transformer which flows when a horizontal output transistor (TR) is on to a distortion correcting capacitor from a light load to a heavy load. CONSTITUTION:When the load is light (less DC component to flyback transformer 10), the primary current of the transformer 10 is fed back to a power source 11 in a damper period, but the capacitor (C) 15 which is charged by a power source 11 when a horizontal TR 17 is on and a distortion correction control TR 18 is off is still charged to apply a reverse bias to the distortion correction control TR 18. Consequently, all of the feedback current to the power source 11 flows to the C15 to pass through the C15 while discharging the C15. When the load is intermediate, the feedback current from the transformer 10 to the power source 11 is reduced, but all of the current flows through the C15 to reduce charges in the capacitor. When the load is heavy, no feedback current flows to the power source 11 and the current flows from the power source 11 to the transformer throughout a horizontal period. At this time, the control TR 18 turns on to charge the C15. |
