HORIZONTAL DRIVE BIAS COMPENSATION CIRCUIT OF VIDEO DISPLAYER

摘要

PURPOSE: A horizontal drive bias compensation circuit of a video displayer is provided to stably control a horizontal drive bias by controlling a horizontal size of a video displayer. CONSTITUTION: The horizontal drive bias compensation circuit of a video displayer comprises an H/V processor portion(10), a DC/DC converter portion(20), a bias compensation circuit portion(30), and a horizontal deflection circuit portion(40). The H/V processor portion(10) provides a horizontal deflection current to a horizontal deflection yoke(50) according to horizontal frequencies of each video mode included in a horizontal synchronous signal. The DC/DC circuit portion(20) provides an operating voltage for controlling a horizontal drive bias voltage. The bias compensation circuit portion(30) outputs a compensation voltage for the horizontal drive bias voltage. The horizontal deflection circuit portion(40) switches the compensation voltage and horizontal drive bias voltage and generates a horizontal deflection current according to the switched horizontal drive bias voltage.