LED luminaire having high power LED drive circuit

摘要

An LED luminaire according to an exemplary embodiment of the present invention includes a rectifier outputting a first rectified voltage generated by rectifying AC voltage and flattening the rectified voltage, a power factor correction unit receiving the first rectified voltage output from the rectifier and generating and outputting a drive voltage, an LED light emitting unit including first to m-th light emitting groups each including at least one LED, the LED light emitting unit sequentially driven by receiving the drive voltage input from the power factor correction unit, and an LED drive IC determining a voltage level of the drive voltage upon receiving the drive voltage input from the power factor correction unit, and controlling sequential driving of the first to m-th light emitting groups according to the determined voltage level of the drive voltage.

主权项

1. A light emitting diode (LED) luminaire, comprising:
a rectifier configured to output a first rectified voltage generated by rectifying and then flattening an AC voltage; a power factor correction unit configured to generate and output a drive voltage equal to or greater than a first threshold voltage sufficient to drive a first light emitting group by stepping up or stepping down the first rectified voltage; light emitting groups that each comprise at least one LED, the light emitting groups being sequentially driven by receiving the drive voltage input from the power factor correction unit; and an LED drive integrated circuit (IC) configured to determine a voltage level of the drive voltage and to control the sequential driving of the light emitting groups according to the determined voltage level of the drive voltage.