As described above, in the present embodiment, the second refresh rate R2 (150 Hz) of the code display mode is set to have a higher rate than the first refresh rate R1 (100 Hz) of the normal mode. These numerical values are merely examples. The second refresh rate R2 may be any value as long as the second refresh rate R2 has a higher rate than the first refresh rate R1 of the normal mode, and given numerical values may be adopted. By displaying a two-dimensional code in the code display mode, it is possible to prevent interference fringes from emerging in a case of reading the two-dimensional code with the camera of the mobile terminal 3, so that the two-dimensional code can be properly read by the mobile terminal 3. Although the power consumption for the second refresh rate R2 of the code display mode is higher than the first refresh rate R1 of the normal mode, it is possible to suppress the effect in terms of the entire power consumption by using the second refresh rate R2 only in a case of displaying a code.