Patent ID: 6313831
Filing Date: 2001-11-06
Classification: G09G

Abstract:
A device for synchronizing a power drive signal of a monitor in accordance with a horizontal synchronization signal from a video card, the device comprising:a central processing unit to receive the horizontal synchronization signal from the video card and determine whether a frequency of the horizontal synchronization signal is larger than a preset frequency;a frequency-division circuit to receive the horizontal synchronization signal from the video card and divide the frequency of the horizontal synchronization signal, to generate a frequency-divided horizontal synchronization signal;a high voltage drive circuit to generate the power drive signal to the monitor in response to an input signal; anda frequency-division signal selection circuit to output the frequency-divided horizontal synchronization signal from said frequency-division circuit to said high voltage drive circuit as the input signal in response to said central processing unit determining that the frequency of the horizontal synchronization signal is larger than the preset frequency, and output the horizontal synchronization signal to the high voltage drive circuit as the input signal in response to said central processing unit determining that the frequency of the horizontal synchronization signal is not larger than the preset frequency.