MOBILE TERMINAL DEVICE AND CONSTRUCTION FOR CHANGING OVER THE STATE OF A MOBILE TERMINAL DEVICE

摘要

Solved is a problem of difficulty in operating, with an operation unit casing held by one hand, both of a touch panel and a key operation unit without changing the hand which holds the unit. A portable terminal device comprising an operation unit casing 10 having a key operation unit 15 formed of a key switch and a display unit casing 20 having a display unit and a touch panel 30, in which the display unit casing is laterally positioned with respect to the operation unit casing such that both of the key operation unit 15 and the touch panel 30 are operable by one-handed operation by a hand which holds the operation, unit casing 10.