| 摘要 |
<p>The present invention relates to a dimming control method of a LED lighting device only using on/off of external power of each SMPS, not including an additional dimming circuit, for the LED lighting device using two or more isolated SMPS in an environment where two or more different external powers are supplied. When a load is generated in controlling, such as defects of an LED module or an LED lamp, additional defects can be prevented by controlling an amount of current using a controller, and a uniform lifetime of LED is ensured via the same dimming control when using an LED lamp of second class or higher.</p> |
