| 摘要 |
PROBLEM TO BE SOLVED: To allow application to terminate when left for a certain period of time without complicating a device configuration and a processing method.SOLUTION: A portable terminal device comprises: an illuminance sensor 105 for detecting surrounding illuminance; and a central control section 101 that terminates active application when the illuminance detected by the illuminance sensor 105 is below or equal to a predetermined specified value to transit the application into a power saving mode. |
