Mobile phone

Abstract

A mobile phone operable to operate a first display using a second touch panel display that partially covers the first display is disclosed. The first display and the second touch panel display are slidably coupled such that the second touch panel display may cover the first display. When low lighting is desired, the second touch panel display may be unlighted, and the first display partially covered by the second touch panel display. A visible portion of the first display may then be operated by touching the unlit second touch panel display.

1 . A mobile phone, comprising:
 a first casing housing a first display part such that a first display surface thereof is exposed from a 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 housing a second display part such that a second display surface of the second display part comprising a touch panel function is exposed from the second surface;   a display control part operable to control the first display part and the second display parts;   an operation content specifying part operable to specify a content of an operation performed to the second display surface; and   a positional relation specifying part operable to specify a positional relation between the first casing and the second casing,   wherein the first casing and the second casing are set 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 the first display surface and the second display surface are visible, and a third positional relation in which a part of the first display surface is exposed from the second casing, by sliding the second casing on the first display surface and   as a result of a specification by the positional relation specifying part, when the positional relation between the first casing and the second casing are the third positional relation, a display of the entire area of the second display surface is set in an off state under control of the display control part, and information is displayed on the part of the first display surface, and when it is specified that a prescribed operation is performed to the second display surface by the operation content specifying part, the information displayed on the part of the first display surface is switched under control of the display control part.