In the explanation of the present embodiment, the CPU 101 determines that an instruction of a request to display a two-dimensional code has been provided in a case where the “DISPLAY TWO-DIMENSIONAL CODE” button has been selected by use of the arrow keys 212 and the OK key 216 has been pressed. However, the present embodiment is not limited as such. It is also possible that the CPU 101 determines whether the image to be displayed on the display device 20 is a two-dimensional code, so as to determine that a request to display a two-dimensional code has been provided in a case where a two-dimensional code is to be displayed. That is, the operation to the “DISPLAY TWO-DIMENSIONAL CODE” button may or may not be a trigger. In a case where a request to display a two-dimensional code has been provided, the processing proceeds to S502.

In S502, the CPU 101 switches the refresh rate of the display device 20 from the first refresh rate R1 of the normal mode to the second refresh rate R2 for displaying a code. That is, the CPU 101 sets the refresh rate of the display device 20 to the second refresh rate R2 for displaying a code. Then, in S503, the CPU 101 displays the image of the two-dimensional code, which corresponds to the contents of the currently-displayed screen (image), on the display device 20. It is possible for the user to read the image of the two-dimensional code with the camera of the mobile terminal 3 and refer to such a manual page of a website, etc., on the mobile terminal 3.