According to an aspect of the invention, there is provided a mobile phone including: a calculating unit configured to calculate an update range of the update data; an input-side switch unit configured to switch a first frame buffer of the plurality of frame buffers to which the update data is to be inputted; and an output-side switch unit configured to switch a second frame buffer of the plurality of frame buffers from which the update data is to be outputted. If the calculated update range is equal to or greater than a predetermined value, the input-side switch unit is connected to the first frame buffer different from the second frame so as to input the update data. If the input-side switch unit completes the input of the update data, the output-side switch unit is connected to the first frame buffer so as to output the update data.