Portable terminal apparatus having automatic adjustment function for time difference

摘要

Area location information on a base station received by a receiver (12) is identified by an area location identification section (14) and an identification result is output to a time controller (24). In case an area location of a portable terminal apparatus (10) has changed with the movement of the portable terminal apparatus (10) thus causing a time difference in the area location of the portable terminal apparatus (10) before and after the movement, the time controller (24) obtains time difference information form a time difference information database (34), adds/subtracts the obtained time difference information to/from a reference time of a timekeeping section (18) to automatically calculate the time corresponding to the area location of the portable terminal apparatus (10) after movement and displays the time on the display section (26). Thus it is possible to display the correct time without entering or registering time difference information by a user.