| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a lighting device capable of improving a ratio of success in transmission and receiving of control signals while avoiding cost hike and complication of operation. <P>SOLUTION: The lighting device consists of a remote-control device sending control signals S1, S2 through the medium of either wave of a plurality of frequency channels, and a lighting fixture alternatively receiving either wave of the plurality of frequency channels through which the transmitting part sends the control signals S1, S2 and controlling a light source in accordance with the control signals received. The remote-control device sends the same control signals S1, S2 for a plurality of times, at least once out of them through a different frequency channel. The lighting fixture periodically changes receiving frequency channels when the control signals S1, S2 are not received. Even if one frequency channel is not usable due to noise, another frequency channel may be available, so that a ratio of success in transmission and receiving of the control signals S1, S2 is improved. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
