To allow an image to be recognized in the human kinetic vision limit state.

Light emitting elements are arranged in an array perpendicularly to the moving direction. In principle, the after image effect of eyes is utilized. Since eyes during movement are at the kinetic vision limit, they cannot follow the light emitting element array (display device). The display device is seen by the user as if it moved relatively. Though the display device gives one- dimensional display, it can be represented as a two-dimensional image by changing the luminance of the light emitting element at the time of relative movement of the device. The address of a memory in which image data is stored is connected to an up/down counter, and a clock of an address counter is obtained in accordance with the width of a display area, the number of effective pixels, and the speed of a moving object, and increment or decrement of the address counter is determined by the direction of the moving object.