| 摘要 |
The present invention relates to an AC powered LED lighting device supporting two kinds of commercial power sources. Particularly, an LED being a load is divided into a first LED group and a second LED group. Here, when a large-sized commercial power source is provided, the first LED group and the second LED group are switched so that the first LED group and the second LED group are connected in series. When a small-sized commercial power source is provided, the first LED group and the second LED group are switched so that the first LED group and the second LED group are connected in parallel. Thus, the LED may efficiently emit light at the same brightness even though the commercial power source is varied in voltage. |
