An apparatus for driving a display panel is provided. The display panel driving apparatus includes a main display controller, an icon display controller, a dot-matrix display controller, an icon driver, a dot-matrix driver, a first DC-DC converter, and a second DC-DC converter. The first DC-DC converter boosts an input DC voltage using a coil and supplies the boosted voltage as a first boost voltage to the dot-matrix driver. The second DC-DC converter boosts an input DC voltage using a capacitor and supplies the boosted voltage as a second boost voltage to the icon driver.