Portable device
First Claim
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,wherein when in the sensitivity adjustment mode, the control unit finds a limit for the signal receiving sensitivity of the receiver in the designated one of the predetermined areas to set a signal receivable area for the receiver in accordance with the limit of the signal receiving sensitivity; and
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,wherein the operation unit is operated during the sensitivity adjustment mode to designate one of the predetermined areas to which the transmission signal is transmitted.
1 Assignment
0 Petitions
Accused Products
Abstract
A portable device for facilitating adjustment of the area in which communication with a controller is enabled. The portable device performs wireless communication with an in-vehicle device, which controls a door lock driver or an engine starter of a vehicle, to remotely control the in-vehicle device. The portable device includes a receiver for receiving a request signal from the in-vehicle device and a control unit for lowering or raising the signal receiving sensitivity of the receiver by predetermined levels to adjust the signal receiving sensitivity.
-
Citations
19 Claims
-
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, wherein when in the sensitivity adjustment mode, the control unit finds a limit for the signal receiving sensitivity of the receiver in the designated one of the predetermined areas to set a signal receivable area for the receiver in accordance with the limit of the signal receiving sensitivity; and 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, wherein the operation unit is operated during the sensitivity adjustment mode to designate one of the predetermined areas to which the transmission signal is transmitted. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A remote control system comprising:
-
a controller for controlling a predetermined controlled subject; a portable device for performing wireless communication with the controller and remotely controlling the controller, the portable device including; a receiving means for receiving a transmission signal from the controller in a plurality of predetermined areas and being selectively operable in a normal mode and a sensitivity adjustment mode, the receiving means having an adjustable signal receiving sensitivity enabling receipt of the transmission signal; a sensitivity adjustment means, connected to the receiving means, for lowering or raising the signal receiving sensitivity of the receiving means 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, wherein when in the sensitivity adjustment mode, the sensitivity adjustment means finds a limit for the signal receiving sensitivity of the receiving means in the designated one of the predetermined areas to set a signal receivable area for the receiving means in accordance with the limit of the signal receiving sensitivity; and an operation unit connected to the sensitivity adjustment means and operable by a person holding the portable device, the operation unit being operated to switch the receiving means between the normal mode and the sensitivity adjustment modes, wherein the operation unit is operated during the sensitivity adjustment mode to designate one of the predetermined areas to which the transmission signal is transmitted. - View Dependent Claims (14, 15, 16, 17, 18, 19)
-
Specification