| 摘要 |
<p>An objective of the present invention is to use a desired range or a desired number of lightings at an optimal efficiency without configuring a separate converter by connecting an LED operation unit formed of blocks to each power source in parallel. To this end, provided is an LED lighting apparatus having a power source to supply input power; and a plurality of LED operation units, wherein the LED operation units include a rectifying circuit to receive the input power from the power source and to output rectified power, an LED unit having a plurality of LED channels serially connected and a resistor unit connected to a last end of the LED channel; a current sensing resistor; and a switch circuit including a plurality of switches, in which an nth switch is connected to a rear end of an nth LED channel to control an operation of the LED channel, and the nth switch is controlled by a sum of a current of the nth switch and a current of an (n+1)th switch. The plurality of LED operation units are connected to each power source in parallel.</p> |
