| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electronic key system capable of preventing an occurrence of a situation where a vehicle is fraudulently used by a third party or the like with a communication terminal with a key function even when the same is left in the vehicle. <P>SOLUTION: The electric key system comprises: an acceleration sensor 40 to detect a movement applied to a mobile phone 20; a sensor information acquisition section 31 to acquire a detection result of the acceleration sensor 40 through a Bluetooth communication which is a different system from an ID collation; a leaving behind discrimination section 33 to discriminate, when a door lock of a vehicle 1 is engaged, whether the mobile phone 20 exists in the vehicle or not based on the detection result of the acceleration sensor 40 acquired through the sensor information acquisition section 31; and an invalidation execution section 35 to invalidate at least a key function of the mobile phone 20 when the mobile phone 20 is left in the vehicle. <P>COPYRIGHT: (C)2012,JPO&INPIT |
