Patent ID: 6469479
Filing Date: 2002-10-22
Classification: G05F,H02M,Y02B

Abstract:
A power control system for a display apparatus, comprising:a reactor including a pair of inductors for calibrating a power factor of an alternating current (AC) voltage supplied from an external source; a rectifier for rectifying the AC voltage having the power factor calibrated by the reactor; a power supply for outputting the rectified voltage with a plurality of voltage levels for supply to a power-consuming component; a switch unit for selectively connecting the pair of inductors in series and in parallel based on a driving power according to the voltage levels of the AC voltage supplied from the external source; a microcomputer for determining whether a display power management system (DPMS) is in an off mode so as to cut off the power supply to the power-consuming component, and for cutting off a power supply to the switch unit when DPMS is in the off mode; and a voltage detection output circuit connected between an output terminal of the power supply and an input of said switch unit for detecting the voltage level outputted by the power supply.