LIGHTING SYSTEM, POWER SUPPLY DEVICE, AND LIGHT FIXTURE

摘要

A lighting device 1 includes a power supplying unit 10 that supplies power and a lighting unit 20 operable using power supplied by power supplying unit 10. Power supplying unit 10 includes: primary coil 11 electrically connected to an output terminal of an output convertor that rectifies an alternating current supplied by an AC power source; and inverter circuit 12. Inverter circuit 12 feeds to primary coil 11 an alternating current with a determined frequency higher than a frequency of the AC power source based on an output voltage of the convertor. Lighting unit 20 includes a secondary coil 21 and lighting control circuit 22. Upon receipt of power generated by electromagnetic induction invoked by alternating current passing through primary coil 11 in secondary coil 21, lighting control circuit 22 causes an LED or other light source to emit light with power.