| 摘要 |
<p>PURPOSE: An AC/DC-combined LED lighting device is provided to separately add a DC power input terminal, thereby emitting light by AC power or DC power. CONSTITUTION: An AC power input terminal is installed to supply AC power. An SMPS(Switching Mode Power Supply) unit(120) changes the AC power supplied through the AC power input terminal into DC power proper for an LED lamp(110). A DC power input terminal is connected to an input terminal of the SMPS unit. The DC power input terminal is installed to supply DC power. A variable resistor is disposed between the DC power input terminal and the LED lamp. The LED lamp emits light.</p> |
