| 摘要 |
PROBLEM TO BE SOLVED: To provide a power supply circuit capable of suppressing flickering caused by a fluctuation component of an AC power supply while suppressing the size enlargement.SOLUTION: A power supply circuit 6 includes a rectification circuit 9 that rectifies electric power of an AC power supply 20 to supply the rectified power to an LED element 7; a transformer 8 that is provided between the AC power supply 20 and the rectification circuit 9 and includes a filter winding 8a and an auxiliary winding 8b; and an IC 10 for current control that adjusts the magnitude of an electric current running through the LED element 7 by detecting a voltage signal of the auxiliary winding 8b and a signal based on the electric current running through the LED element 7. |
