| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an illumination control system allowing an user to set optional illuminance for a prescribed period in manual operation, capable of automatically returning to automatic control after a prescribed period of time. <P>SOLUTION: The illumination control system is composed of a lightness sensor 1 detecting the lightness of an environment, an illumination apparatus 2 of which the lightness is controlled in compliance with the detected value of the lightness sensor, and a control means 3 which controls the level of the lightness of the illumination apparatus automatically so that the lightness turns into a target value in compliance with the detected value of the lightness sensor, and at the manual operation changing the lightness in an optional level, starts the measurement of a time from the start of manual control, and controls so as to return to automatic control after the passage of the prescribed period of time. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
