Driving method for reducing emi and device using the same

A driving device for a display system, comprising:

• a first buffer, for outputting a first display voltage;
• a second buffer, for outputting a second display voltage;
• a first switch, coupled to the first buffer and a positive output end for outputting the first display voltage to the positive output end according to a first control signal;
• a second switch, coupled to the second buffer and a negative output end for outputting the second display voltage to the negative output end according to a second control signal;
• a charge sharing switch, coupled to the positive output end and the negative output end for performing a charge sharing according to a sharing control signal;
• a detecting unit, coupled to the first buffer and the second buffer for detecting a voltage difference between the first display voltage and the second display voltage, to generate a detecting signal;
• and
• a control unit, coupled to the detecting unit for adjusting an operating method of the charge sharing switch according to the detecting signal.