| 摘要 |
PURPOSE: An AC drive LED lighting device which supports two kinds of a commercial power source is provided to connect a first LED light emission group and a second LED light emission group in series and parallel according to a size of the provided commercial power source. CONSTITUTION: A first light emission group(7) and a second light emission group(8) are comprised of one or more LEDs. A plurality of the LEDs is arranged in series, parallel, or series/parallel mixed arrangements. A controller(3) connects the first light emission group and the second light emission group in series while receiving high commercial voltage by measuring an effective AC voltage value. The controller connects the first light emission group and the second light emission group in parallel while receiving low commercial voltage. A first commercial voltage switch connects the first light emission group and the second light emission group in series while receiving the high commercial voltage. The first commercial voltage switch connects the first light emission group and the second light emission group in parallel while receiving the low commercial voltage. |
