| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a light source control device that can appropriately drive a plurality of semiconductor light sources having different rated currents.SOLUTION: An LED lighting circuit 10 includes: a power supply section 100 for supplying a driving current Iout to a plurality of LEDs 40-1 to 40-N connected in series; a first bypass switch 110-1 connected in parallel with the first LED 40-1; an averaging section 160 configured to charge an averaging capacitor 162 when the first bypass switch 110-1 is off, and discharge the averaging capacitor 162 to the first LED 40-1 when the first bypass switch 110-1 is turned from off to on; and a bypass drive section 112 for periodically turning on/off the first bypass switch 110-1.</p> |
