Patent ID: 7443287
Filing Date: 2008-10-28
Classification: B60R,G07C,G08C

Abstract:
1. A portable device for performing wireless communication with a controller, which controls a predetermined controlled subject, and remotely controlling the controller, the portable device comprising: a receiver for receiving a transmission signal from the controller in a plurality of predetermined areas, the receiver having an adjustable signal receiving sensitivity enabling receipt of the transmission signal and being selectively operable in a normal mode and a sensitivity adjustment mode; a control unit, connected to the receiver, for lowering or raising the signal receiving sensitivity of the receiver by a predetermined level in the sensitivity adjustment mode in cooperation with the transmission signal when the portable device is located in a designated one of the predetermined areas to which the transmission signal is transmitted, an operation unit connected to the control unit and operable by a person holding the portable device, the operation unit being operated to switch the receiver between the normal mode and the sensitivity adjustment mode,