| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a power-saving system of the electric power for illumination, which is made so that the power consumption of illumination may be cut down without disturbing for help. <P>SOLUTION: The existence of a human being in a predetermined domain is detected by a human detection sensor (30), and a dimmer (200) is controlled by a dimming control means (20) so that the illumination may serve as predetermined high illumination, when man exists, and when man does not exist, the illumination may become predetermined low illumination. The dimmer is also controllable so that the illumination light and the coming light from exterior, which are put together, may become predetermined high illumination or low illumination by detecting the illumination of the coming light from exterior with a coming light detection sensor (40). <P>COPYRIGHT: (C)2003,JPO</p> |
