| 摘要 |
A dimmable LED illumination system includes a power converting circuit (10, 40) and a lamp (30, 60). The power converting circuit (10, 40) is electrically connected to a power source (100) to convert electric power of the power source (100) into a voltage signal. The lamp (30, 60) includes a DC/DC converter (32, 62) and a LED module (32, 64), wherein the DC/DC converter (32, 62) is electrically connected to the power converting circuit (10, 40) to convert the voltage signal into a corresponding current signal. The LED module (32, 64) is electrically connected to the DC/DC converter (32, 62) to be driven by the current signal to emit light. By adjusting a voltage provided by the power converting circuit (10, 40), a current provided by the DC/DC converter (32, 62) could be adjusted as well, which changes a luminance of the LED module (32, 64). |
