| 摘要 |
PROBLEM TO BE SOLVED: To provide a marker lamp and a marker lamp system that notifies to a constant current power supply device even under any abnormal lighting state caused by abnormality of a light emission element or abnormality of a lighting control circuit.SOLUTION: A lighting control circuit 15 includes a lighting circuit 31, a load adjusting circuit 25 and a controller 35. The lighting circuit 31 turns on a light emission element 16. The load adjusting circuit 25 performs opening/closing between a high voltage side and a low voltage side at the output side of an isolation transformer 12. The controller 35 controls the opening/closing of the load adjusting circuit 25. The lighting control circuit 15 controls the lighting state of the light emission element 16 by the lighting circuit 31, and makes the controller 35 control the load adjusting circuit 25 to open when detecting that the light emission element 16 is under an abnormal lighting state. A releasing device 14 is operated upon an input voltage from the lighting control circuit 15, and physically releases the connection between the isolation transformer 12 and the lighting control circuit 15 when the input voltage increases to a predetermined voltage or more.SELECTED DRAWING: Figure 1 |
