Lighting device

摘要

A lighting device includes a rectifier circuit for rectifying an AC voltage, a power-factor correction circuit for inputting the rectified voltage from the rectifier circuit to generate a first DC voltage, a capacitor for smoothing the rectified voltage to generate a second DC voltage, a first lighting power supply, and a second lighting power supply. The first lighting power supply, of which input power supply is the first DC voltage, supplies lighting power to a first light source including one or more light emitting devices. The second lighting power supply, of which input power supply is the second DC voltage, supplies lighting power to a second light source including one or more light emitting devices. An output voltage of the second lighting power supply is lower than an output voltage of the first lighting power supply.

主权项

1. A lighting device, comprising:
a rectifier circuit configured to rectify an AC voltage; a power-factor correction circuit configured to receive the rectified voltage from the rectifier circuit to generate a first DC voltage; a capacitor configured to reduce ripple of the rectified voltage to generate a second DC voltage; one or more first lighting power supplies, of each of which input power supply is the first DC voltage, configured to supply lighting power to respective one or more first light sources each of which comprises one or more light emitting devices; and one or more second lighting power supplies, of each of which input power supply is the second DC voltage, configured to supply lighting power to respective one or more second light sources each of which comprises one or more light emitting devices, wherein an output voltage of the one or more second lighting power supplies is lower than an output voltage of the one or more first lighting power supplies.