| 摘要 |
A portable terminal apparatus including a main body with display unit capable of displaying a character or other patterns on an upper surface side thereof and a key display on a lower surface side thereof, and a lid which can be mounted on and detached from the main body and which has a transparent touch panel arranged at a position to cover either one of the display means and the key display when the lid is mounted on the main body. The main body has a recognizing section for recognizing the mounting condition of the lid whether the touch panel is mounted on the upper surface side or the lower surface side of said main body, a determining section for determining a position pointed on the touch panels a controlling section for controlling display of a character or a pattern displayed on the display unit, and a central processing unit for controlling the display control unit on the basis of outputs from the recognizing section and the determining section and for causing the display unit to display the character or other pattern.
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