Patent ID: 9237618
Filing Date: 2016-01-12
CPC Classification: H01L,H05B

Claim Text:
1. An LED lighting apparatus comprising: a power supply unit configured to convert an AC voltage and provide a rectified voltage; a light source configured to include N LED channels (N is a natural number) including at least one LED; and a current control circuit configured to divide a varying width of the rectified voltage into N periods in response to a light-emitting voltages for each LED channel, detect a current flowing in the LED channels corresponding to the period, and control the light source to emit light by using a current detection voltage corresponding to the detected current, wherein the N LED channels are arranged within a predetermined region on a substrate and have a heat radiating priority determined depending on a heat value by light output and a position of the LED channels on the substrate is determined depending on the heat radiating priority.