DRIVING APPARATUS FOR LIGHT EMITTING DIODES

WIPO Patent Application WO/2011/108876

A2

A driving apparatus for light emitting diodes is disclosed. The driving apparatus for light emitting diodes (LEDs) includes: at least one capacitor connected in series with an AC power source to limit current; and a first LED array and a second LED array connected in series with the capacitor, wherein the first LED array and the second LED array are connected in parallel and have opposite polarities, wherein the voltage drop of the LED arrays is one half the maximum voltage of the AC power source. The LED driving apparatus operates using an AC power source on the basis of a simple driving circuit, is insensitive to changes in temperature and source voltage, may be manufactured at low costs, consumes only a small amount of power, has good characteristics in relation to harmonics of input current and power factor, and operates at a high frequency in a flicker-free way.

RIM CHUN-TAEK (KR)
KIM BONG-CHEOL (KR)
HUH JIN (KR)
KIM YUN-HO (KR)
LEE BYUNG-HUN (KR)
KIM HYUN-JAE (KR)
LEE WOO-YOUNG (KR)

PCT/KR2011/001488

September 09, 2011

March 04, 2011

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KOREA ADVANCED INST SCI & TECH (KR)
RIM CHUN-TAEK (KR)
KIM BONG-CHEOL (KR)
HUH JIN (KR)
KIM YUN-HO (KR)
LEE BYUNG-HUN (KR)
KIM HYUN-JAE (KR)
LEE WOO-YOUNG (KR)

KR20080076504A	2008-08-20
KR20060090014A	2006-08-10
JP2009165261A	2009-07-23
JP2010040170A	2010-02-18
KR20070047056A	2007-05-04

CHANG, Sue-Hyun (Samhwa Bl. 738-43, Yeoksam-dong, Gangnam-gu, Seoul 135-080, KR)

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