PURPOSE: To execute the video display of PAL and NTSC with the different numbers of scan lines while making a liquid crystal panel common.

CONSTITUTION: A horizontal synchronizing pulse H for horizontal scanning while changing the frequency dividing step of a 1/N frequency) divider 30 in a PLL circuit is accelerated so as to drive a liquid crystal panel 20, which forms picture elements in the shape of a matrix beforehand corresponding to a PAL signal with a lot of scan line, by an NTSC signal A to be inputted. Further, the supply of a liquid crystal video signal C to the liquid crystal panel is controlled by an analog switch 23 so as to set the display area of the liquid crystal panel. According to a mask timing signal J prepared from various synchronizing signals, the analog switch 23 controls the supply of the video signal to the liquid crystal panel.