To provide a mobile information apparatus capable of sharply displaying a moving picture while taking into account the power consumption.

When a state of a mobile phone 1 is during a TV phone or during camera photographing, a difference between n-th image data this time received through a control means control section 6 or captured through a camera control section 2 and succeeding (n+1)th image data is compared (S6). As a result of comparison, no difference is detected between the n-the image data and the (n+1)th image data, when a set lighting time elapses, a backlight 5a is put out (S4). On the other hand, when the difference is detected between these image data, a backlight control section 8 is notified with it and lighting of the backlight 5a continues (S7).