A liquid crystal display includes an LCD panel, a source driver outputting image signals to the LCD panel, a gate driver sequentially outputting scanning signals to the LCD panel. At the same time of power on, high-level bias voltages are applied to a common electrode line of the LCD panel, and simultaneously, driving of the source driver and the gate driver are stopped. After a specific time has passed, common electrode voltages are applied to the common electrode lines of the liquid crystal display instead of the high-level bias voltages to drive the source driver and the gate driver.