| 摘要 |
PROBLEM TO BE SOLVED: To set a target ratio of a maximum current and a minimum current being fed to an LED, regardless of the performance of an LED driver while preventing malfunction.SOLUTION: An LED lighting device 1 includes an LED circuit 5 having at least one LED(1-5), bypass means 6 inserted in parallel with the LED(1-5), and an LED driver 4 which supplies current to the LED(1-5) and the bypass means 6 by duty control. When feeding a predetermined minimum current to the LED circuit 5, the LED driver 4 feeds the minimum current while adding a current component flowing through the bypass means 6. |
