Method for controlling a power saving mode of a video display device with respect to a predetermined one of a plurality of applied signal sources

摘要

A method for controlling a video display device having multiple signal sources, which comprises the steps of: detecting whether a synchronous signal is input to a microcomputer; detecting a signal source selection state if the synchronous signal is not input; converting a present mode to a power-saving mode if the signal source selection state indicates the computer as the selected signal source; and maintaining the present mode if the signal source selection state indicates a signal source other than the computer to be the selected signal source. Alternatively, the method may comprise the steps of: detecting a signal source selection state; detecting whether a power-saving command is input from a computer in the signal source selection state is the computer; executing a power-saving mode if the power-saving mode is input from the computer; detecting a picture-in-picture (PIP) enable state if the power-saving command is not input from the computer; displaying a video signal input from the computer on a screen if the PIP enable state is not enabled; detecting the PIP selection state if the PIP enable state is enabled; displaying the video signal input from the computer on a main screen and displaying a video signal input from a corresponding signal source, according to the PIP selection state, on a subscreen; and displaying a video signal of a selected signal source on a screen if the signal source selection state is a signal source other than the computer.