LED lighting apparatus having improved flicker performance

摘要

Provided is a lighting apparatus using LEDs (light-emitting diodes having improved flicker performance. In general, in a direct-drive LED lighting apparatuses of the related art which use no switching-mode power supply (SMPS), percent flicker (hereinafter referred to as “% F”) is 100%. In contrast, the % F of the LED lighting apparatus having improved flicker performance according to the present invention is 40% or less that is equivalent to the % F of fluorescent lamps using a magnetic ballast.

主权项

1. An LED lighting apparatus having improved flicker, comprising:
an AC power supply which supplies a first-phase AC voltage and a second-phase AC voltage; first and second rectifier circuits which convert the AC voltages into DC rectified voltages; first and second LED blocks each including one or more LEDs as a load; first and second current limiting devices each of which limits an amount of current; a first LED lighting block comprising the first rectifier circuit which rectifies the first-phase AC voltage, a first LED block which is driven by an output from the first rectifier circuit, and the first current limiting device which limits the amount of current of the first LED block; and a second LED lighting block comprising the second rectifier circuit which rectifies the second-phase AC voltage, a second LED block which is driven by an output from the second rectifier circuit, and the second current limiting device which limits the amount of current of the second LED block, wherein, when a point of time where each of the AC voltages supplied to a corresponding LED lighting block of the LED lighting blocks passes through a zero voltage and starts to increase is set to a voltage phase 0°, a current starts to be supplied to each of the LED lighting blocks and light emission starts before a voltage phage 10°, and a percent flicker of each of the LED lighting blocks is 100%.