Patent ID: 9743470
Date: 2017-08-22
CPC Classifications: F21K,F21Y,H05B,Y02B

Claim:
1. A lighting control circuit for controlling a solid-state light-emitting element, comprising: a rectifier part that is connected to a ballast to which commercial alternating-current electric power is supplied, and converts the alternating current to direct current, the rectifier part constituting a bridge-type full-wave rectifier circuit; a smoothing capacitor that is provided on an output side of the rectifier part, and removes an alternating-current component included in direct current outputted from the output side; a high-frequency coil that is used as an inductor, the high-frequency coil being provided between the smoothing capacitor and an output side of the rectifier part, increasing impedance of the smoothing capacitor seen by the ballast, and suppressing high-frequency noise occurring on a side of the smoothing capacitor; and a constant current control circuit that performs constant current control on the solid-state light-emitting element.