Light-emitting diode driving circuit for lighting

A light-emitting diode (LED) driving circuit for lighting, comprising:

• a bridge diode rectification unit configured to full-wave rectify AC power and supply pulsating-current driving power to an LED array unit including two or more LEDs connected in series;
• a synchronizing signal and clock generating unit configured to detect the period of the pulsating-current driving power, generate a synchronizing signal based on the detected period, and generate a clock having a frequency several times larger than input power using the generated synchronizing signal;
• a driving data storage device in which driving data of a pattern for driving the LEDs in the LED array unit with high frequency, a high power factor, and low total harmonic distortion (THD) are divided and stored for a number of sections within one period or a half period of the driving power;
• a drive control unit configured to generate address signals corresponding to clocks outputted from the synchronizing signal and clock generating unit and sequentially read the driving data for the respective sections which are stored in the driving data storage device;
• a D/A converter configured to convert digital driving data outputted from the drive control unit into analog signals;
• and
• a constant current driving device unit configured comprising a plurality of constant current driving devices connected to taps of the LEDs connected in series in the LED array unit so as to selectively drive the LEDs according to an output signal of the D/A converter, and configured to drive a corresponding LED among the LEDs connected in series to a corresponding current value during a corresponding period, through the plurality of constant current driving devices.