A pulse having a width of 20H is inserted into STV in correspondence with a vertical blanking period (a period of 21 H), and the speed of CKV is increased to 12 times the original speed over the period of 21 H at the same time the pulse becomes High. A video signal in the vertical blanking period is at a black level, so that black is written into all organic EL elements in the period. An organic EL display continues to display black for a time period elapsed until a video is next written by the original line selection pulse. The video signal is corrected such that the shorter a video display time period provided to the EL element becomes, the higher the input video luminance of the EL element becomes in order to display black.