DIMMABLE LED LIGHTING DEVICE

WIPO Patent Application WO/2013/133579

A1

The present invention relates to a dimmable LED lighting device which comprises: a rectifier circuit for rectifying an alternating current voltage to a direct current rectified voltage; an LED light-emitting block configured of at least one LED; a load (n≥1 and is a natural number) connected in series to n LED light-emitting blocks; a switch block configured as a switch for bypassing the current flowing in each light-emitting block of the load; a current limiter for limiting the current supplied to the LED light-emitting blocks; and a controller for controlling the switch block and the current limiter, wherein the controller further includes the function of measuring the removed delta phase when an alternating voltage is partially phase cut by a phase controller and supplied, the controller uses the measured delta phase and adjusts the amount of current of the current limiter, and all LED light-emitting blocks are lit in each rectifying cycle even when dimming is 50% or more.

JPH04112294	[Title of the device] The brilliance control circuit of a light emitting element
JPH08124409	ROOM LIGHT FOR ENTRANCE
JP5941139	A lighting installation incorporating a system which controls a solid-state lighting device, a method and the system, and/or a method

LEE DONG WON (KR)

PCT/KR2013/001694

September 12, 2013

March 04, 2013

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LEE DONG WON (KR)

H05B37/02; F21S2/00

KR100995793B1	2010-11-22
KR101110380B1	2012-02-24
US20100194298A1	2010-08-05
JP2011165394A	2011-08-25
KR20070000963A	2007-01-03

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