| 摘要 |
Disclosed is an LED lighting device capable of lighting an LED lamp effectively and stably through AC power. The LED lighting device comprises: an AC power and an LED array having a plurality of LEDs connected in parallel and connected to the AC power. Also, the LED lighting device comprises a photo coupler for outputting a certain amount of voltage after recognizing the amount of light outputted from the AC power and which contains a light outputting part and a light receiving part; an AD converter for AD converting after receiving the amount of voltage from the photo coupler; a PWM module for outputting an operating current for operating the LED array through PWM after receiving the AC power connected to the AD converter; a micro-controller unit having a micro-controller for maintaining or changing the duly ratio of PWM module after comparing the AD converted value with a predetermined value by a user; and a switching terminal for controlling the operating current for the LED array coming from the PWM module, connected between the PWM module and LED array. |
