Title:
FLICKERLESS LED DRIVER DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/069522
Kind Code:
A1
Abstract:
A flickerless LED driver device is disclosed. The present invention provides an LED driver device comprising: a transformer including a primary coil to which an alternating current voltage is applied, and a secondary coil for generating a first inductive voltage induced by the primary coil; a secondary coil circuit for receiving the first inductive voltage and applying a first direct current voltage to a light emitting diode (LED) module; a current detecting unit for detecting, from the secondary coil circuit, a driving current that flows through the secondary coil; a current control unit for receiving a signal associated with the driving current and generating a control signal for controlling a light emission current that flows through the LED module; and a ripple attenuator which is connected with the LED module, receives a visual light communication (VLC) signal and the current control signal, controls a light emission current corresponding to the VLC signal to flow, and suppresses ripple of the light emission current.
Inventors:
KIM SANGOK (KR)
KIM BYUNGOH (KR)
KIM DONGSIK (KR)
SHIM HYUN-CHEOL (KR)
KIM BYUNGOH (KR)
KIM DONGSIK (KR)
SHIM HYUN-CHEOL (KR)
Application Number:
PCT/KR2016/011783
Publication Date:
April 27, 2017
Filing Date:
October 20, 2016
Export Citation:
Assignee:
YUYANG DNU CO LTD (KR)
International Classes:
H05B44/00; F21S2/00; F21V23/02; H05B37/02; H05B45/50; H05B45/59; F21Y101/00
Foreign References:
| KR20070096242A | 2007-10-02 | |||
| KR101501600B1 | 2015-03-19 | |||
| JP2010170704A | 2010-08-05 | |||
| KR100948736B1 | 2010-03-22 | |||
| KR20140104196A | 2014-08-28 | |||
| JP2012243410A | 2012-12-10 |
Attorney, Agent or Firm:
LEE, Chulhee (KR)
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