| 摘要 |
<p>A mobile terminal device where there is no increase in the number of operation keys and the number of times the user presses the operation keys in inputting letters is reduced. The mobile terminal device has operation keys (10-21) to which letters and functions are allocated and that are arranged at an operation section so that they can be depressed, released from the depression, and slid; a touch sensor section (5) for detecting depression and release of each operation key; a movement sensor (2) for detecting sliding of each operation key; a control section (101) which, when the touch sensor section (5) detects that an operation key is depressed and then detects the depressed key is released, execute a function allocated to the depressed operation key, and when the movement sensor (2) detects that an operation key is slid while the touch sensor section (5) detects that the key is depressed, displays a letter allocated to the depressed key on a display section (3).</p> |
