Abstract: A horizontal-deflection correction circuit may be constructed with a horizontal deflection stage for deflecting a scan electronic beam in a horizontal direction by a sawtooth current flowing in horizontal deflection coil; a control stage for outputting a first and second control voltages which have the same value in case of performing a linear correction and for outputting the first and second control voltages which have different values in case of performing a S-shaped correction; a first correction stage for varying an inductance of a first variable inductor connected in series to the horizontal deflection coil according to the first control voltage and for correcting a magnitude and a direction of the sawtooth current; and a second correction stage for varying an inductance of the second variable inductor connected in series to the first variable inductor in an opposite polarity and for correcting the magnitude and the direction of the sawtooth current.

Abstract: The present invention relates to an apparatus and a method for saving electric power in a display system in which, when the display system is turned to an off mode, a total electric power consumption is reduced to a range for the display system to be operated through a reduction of an on-duty time period of a PWM pulse by using a charging/discharging device of a large capacitance. The present invention provides an ultra electric power-saving mode for a display system when the display system is turned into an off mode with no input of the horizontal and vertical synchronization signals from a video card of the computer main body to the display system. It accomplishes this by reducing the total electric power consumption by approximately half compared to the existing off mode performance through a remarkable reduction of the on-duty time of a PWM pulse to a range of supplying an operational voltage of the microcomputer with the use of a charging/discharging device of large capacitance.