Ac led lighting apparatus

Abstract

An alternating current (AC) light-emitting diode (LED) lighting apparatus includes a circuit board having a circuit pattern disposed thereon, LEDs disposed on the circuit board and connected to each other by the circuit pattern, and first to n-th LED drive integrated circuits (IC) disposed on the circuit board and respectively connected to the LEDs and the circuit pattern.

What is claimed is: 
     
         1 . An alternating current (AC) light-emitting diode (LED) lighting apparatus comprising:
 a circuit board comprising a circuit pattern disposed thereon;   LEDs disposed on the circuit board and connected to each other by the circuit pattern; and   first to n-th LED drive integrated circuits (IC) disposed on the circuit board and respectively connected to the LEDs and the circuit pattern;   wherein:   the LEDs are disposed in first to n-th light emitting blocks, n being a positive integer ≧2;   each of the light emitting blocks comprises first to m-th light emitting groups (m being a positive integer ≧2), each first to m-th light emitting group having a discrete threshold voltage and configured to be sequentially driven according to a voltage level of the AC voltage;   the first to m-th light emitting groups respectively disposed in each of the light emitting blocks and having the same threshold voltage are configured to be simultaneously turned on or off;   the LED drive IC is configured to control sequential driving of the first to m-th light emitting groups according to the voltage level of the AC voltage; and   the first to n-th light emitting blocks are radially disposed on a concentric circle about the center of the circuit board, and the first to n-th LED drive ICs are respectively disposed in the first to n-th light emitting blocks adjacent to the center of the circuit board.