| 摘要 |
<P>PROBLEM TO BE SOLVED: To control indoor illumination so as to be adapted to a desired psychological state changing depending on time or use. <P>SOLUTION: By arranging a plurality of light-emitting elements L on a ceiling surface 1 of a meeting room or the like and by changing a light-emitting shape of the ceiling surface depending on the desired psychological state, the psychological state of each person staying in the room is led to the desired one. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
