| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lighting device capable of reducing a cost of a lead wire, reducing input terminals on a side of a controlling unit and alleviating a connection work by reducing the number of lead wires to connect a sensor unit 1 with the controlling unit 2. <P>SOLUTION: The lighting device is provided with a sensor unit 1 equipped with a sensor 11 outputting a voltage showing a detected state of a human body and a switch 12 capable of setting a plurality of states, and a controlling unit 2 for adjusting a light output of a light source 4 by detecting a detected state of the sensor 11 and a set state of the switch 12, and the detected state of the sensor 11 and the set state of the switch 12 are transmitted through the same signal line LNS. <P>COPYRIGHT: (C)2010,JPO&INPIT |
