| 摘要 |
<p>The present invention provides an dimming circuit for an LED lighting device comprising the following: a power supply unit (10) for removing noise of AC power connected to a common power input part (11a) in which common AC power (1) is inputted and for rectifying the same; an LED operating unit (20) having an electricity resistor (22) for setting the electric power of the operating unit, in which DC power rectified by the power supply unit (10) according to on/off operations of a first switch (3) connected to the common power input part (11a) inbetween the power supply unit (10) and an LED module (2) is converted; and a dimming circuit for an LED lighting device for controlling the brightness of the LED module (2), connected to the LED converting circuit having the LED operating unit. In the present invention, provided are a relay (110) connected to two ends of the electricity resistor (22) in parallel; and the dimming circuit for an LED lighting device in which the operating power is reduced according to capacity value of a first dimming control resistor (120) by selectively cutting a signal line (A) in which the electricity resistor (22) and the first dimming control resistor (120) are connected according to the on/off operations of a second switch (4). [Reference numerals] (2) LED module;(3) First swtich;(4) Second switch</p> |
