An LED driving element that can perform black line insertion display without increasing the clock frequency. LED driving element 11 has first and second shift registers 34a, 34b used for controlling the light-emitting elements on one side among the light-emitting elements arranged in two adjacent rows. In the normal mode, the first and second shift registers 34a, 34b are connected in series. In the image quality improvement mode, the first or second shift register is bypassed by short circuit line 30. In the normal mode, the light emission data are moved serially through the first and second shift registers 34a, 34b. In the image quality improvement mode, the light emission data are moved in only one shift register, that is, shift register 34a or 34b, so that black line insertion can be performed in the same rewriting time per row as in the normal mode without increasing the clock frequency.