It is an object of the invention to provide a liquid crystal display device that can realize a driving method reducing the power consumption of a driving circuit in a condition that real-time processing is available. In a liquid crystal display device, SW1 is controlled such that pixel data on odd lines are written in a first RAM (12), pixel data on even lines are written in a second RAM (13) for ist line to 11th line, and pixel data on 12th line are transferred to a latch circuit (14) directly. In a liquid crystal display device, SW1 is controlled such that pixel data on odd lines are written in the second RAM (13), pixel data on even lines are written in the first RAM 12 for 13th line to 23rd line, and pixel data on 24th line are transferred to a latch circuit (14) directly. Pixel data written in the first and second RAMs (12, 13) are output to source driver (15), which performs time-series operating process, through the latch circuit (14).