A voltage generating circuit for driving a liquid crystal display panel with a simplified circuit configuration generates a plurality of voltage signals necessary to drive the liquid crystal display panel. The voltage generating circuit includes a reference node having a voltage level varying according to a line pulse, a plurality of reference voltage sources supplying reference voltage signals having different voltage levels, and a plurality of capacitors, coupled to said reference node and to said reference voltage sources, for generating a plurality of driving voltage signals according to the line pulse.