Ac-powered led lighting system

An AC-powered LED lighting system comprising:

• a sensing part for detecting an existence of human, a brightness of natural light, and an elapsed time of a day in an applied space of the LED lighting system;
• a microcomputer for generating control signals for controlling a lighting luminance of LEDs in a respond to the detected signals inputted through the sensor;
• a dimming circuit part for generating driving signals for modulating the driving luminance of the LED elements by PWM controlling the AC power applied from outside through the control signals inputted by the microcomputer;
• and
• a LED module for performing a rectification for driving the LED elements according to the driving signals generated through the dimming circuit part, supplying the rectified power source to the LED elements, and performing a function of a LED lighting according to the control signals of the microcomputer.

An AC-powered LED lighting system comprising:

• a bridge diode rectifier circuit part for receiving an AC power source for use as a driving source for the lighting system and converting the received AC power source into a rectifying power for driving a RGB LED to be outputted;
• a module color controlling circuit part for divisionally supplying the AC power source to each LED of RGB inputted through the bridge diode rectifier circuit part and setting and controlling a lighting color obtained in the end;
• and
• a RGB LED driving part having a plurality of LEDs for emitting the light of RGB through the power source inputted by the module color controlling circuit part, each LEDs having a R(red) LEDs group, a G(green) LEDs group, and a B(blue) LEDs group electrically connected in series and the power source inputted by the module color controlling circuit part being distributed to each LED to generate a drop of electric pressure, whereby driving each RGB LEDs according to a desired voltage.