A display device includes pixel driving circuits. A first pixel driving circuit includes a light emitting element, first and second driving units and a control unit. The light emitting element emits light according to a current. The first driving unit generates the current. The second driving unit drives the first driving unit to adjust the current according to a first scanning signal. The control unit controls the first driving unit to adjust the current according to a first light emitting signal. The first scanning signal has first slope to third slopes during first to third periods, respectively. The first to third slopes are different from each other. The first light emitting signal has an enable voltage level during the first and third periods, and has a disable voltage level during the second period. The first to third periods are arranged continuously in order.