| 摘要 |
<p>This invention is an anti-theft system (1,2,3) that is capable of preventing theft of a vehicle-mounted device, and improving the convenience to a user. This invention creates current-position information for a vehicle that indicates the current position (122,...,126) of the vehicle, and projects the created current-position information for the vehicle on map information that was stored beforehand, and when the current-position information for the vehicle matches specified position information (120,121) that is created based on arbitrary conditions set by the user, it makes it impossible to detect a vehicle-mounted device that can seen from outside the vehicle. This can be achieved by concealing the device by hiding, reducing its volume or its brightness. <??>Independent claims are also included for an anti-theft system starting up an anti-theft device only if there is a match between the current-position information and the specified position. <IMAGE></p> |
