| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To facilitate setting of a target illuminance even if a number of devices in need of setting the target illuminance exist, by controlling light outputs of a lighting fixture so as to keep an illuminance on a working face at the target illuminance. <P>SOLUTION: The system is provided with the lighting fixture changing light outputs according to light-control signals inputted from outside, and a controller 12 equipped with a function of detecting a working-face illuminance within a range lit by the lighting fixture 1 and generating light-control signals to the lighting fixture so that the working-face illuminance may maintain the preset target illuminance. The controller 12 is connected to a transmission unit 10 making data transmission by a time division multiplex transmission system through signal wires Ls. A light-control switch 11 is connected to the signal wires Ls, and the target illuminance is stored at a data memory part consisting of a nonvolatile memory fitted to the controller 12 by operation of an up-operating part Su and a down-operating part Sd of the light-control switch. <P>COPYRIGHT: (C)2004,JPO&NCIPI</p> |
