Mobile phone

A mobile phone, comprising:

• a first casing comprising a first display module, the first display module comprising a first display surface;
• a second casing comprising a first surface mutually opposed to a second surface and slidable on the first display surface with the first surface at a side of the first casing, and comprising a second display module comprising a second display surface, the second display surface comprising a touch panel function and being exposed from the second surface;
• a display control module operable to control the first display module and the second display module;
• wherein the first casing and the second casing are settable in a first positional relation in which an entire area of the first display surface is covered with the second casing, a second positional relation in which an entire area of each of the first display surface and the second display surface is visible, and a third positional relation in which a part of the first display surface is visible, a part of the first display surface is covered with the second casing, and an entire area of the second display surface is visible, by sliding the second casing on the first display surface, and
• wherein the display control module is configured to, while the first casing and the second casing are in the third positional relation,
• cause the second display module to turn off a backlight for the visible second display surface,
• cause the first display module to display information on the visible part of the first display surface, and
• switch the information displayed on the visible part of the first display surface, if a prescribed operation is performed to the visible second display surface while the backlight for the second display surface is turned off.