A system for displaying images is provided. The system comprises a reference voltage source, a digital-to-analog converter, a multiplier and a buffer. The reference voltage source outputs a voltage signal, wherein the magnitude of the voltage signal is 1/N of a driving voltage. The digital-to-analog converter converts the voltage signal to a first voltage. The multiplier receives and multiplies the first voltage by N to output the driving voltage. The buffer receives the driving voltage to drive a data line.