| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lighting system in which a high illuminance state of a light-emitting element can be prolonged. <P>SOLUTION: The lighting system includes at least one light-emitting element 11, a detection element 21 for detecting illuminance of light emitted from the light-emitting element 11, and a current control circuit 31 for increasing a value of a current Id flowing in the light-emitting element 11 when the illuminance detected by the detection element 21 falls below a predetermined value. <P>COPYRIGHT: (C)2011,JPO&INPIT |
