| 摘要 |
<P>PROBLEM TO BE SOLVED: To perform dimming control according to a lighting time of an LED lamp and to automatically reset the lighting time when wire is broken in the LED lamp, and further not to reset the lighting time when the LED lamp is detached. <P>SOLUTION: A sequence control part 8 increments the number of times of a stop period, determines that wire is broken in the LED lamp 110 due to the fact that the number of times of the stop period is counted twice, and resets a lighting time clocked by a lighting time timer part 9 and a lighting time stored in a storage part 10 to zero. Therefore, when a failure such as the breaking of the wire in the LED lamp 110 is caused, the lighting time of the LED lamp 110 is automatically reset to zero, and when the LED lamp 110 is detached, the lighting time is prevented from being reset to zero. <P>COPYRIGHT: (C)2012,JPO&INPIT |
