ALTERNATING CURRENT-DRIVEN LIGHT EMITTING ELEMENT LIGHTING APPARATUS

Title:

ALTERNATING CURRENT-DRIVEN LIGHT EMITTING ELEMENT LIGHTING APPARATUS

Document Type and Number:

WIPO Patent Application WO/2015/190746

Kind Code:

A1

Abstract:

Disclosed is a dimmable alternating current-driven light emitting element lighting apparatus. The disclosed alternating current-driven light emitting element lighting apparatus of the present invention comprises: a triac dimmer for generating a modulated alternating current voltage by modulating a phase of alternating current power according to a selected level of dimming; a rectifying unit for generating driving voltage by full-wave-rectifying the alternating current voltage having the phase modulated by the triac dimmer; a dimming level detection unit for detecting a dimming level according to the driving voltage; a phase modulation reference setting unit for setting a phase modulation reference value to be compared with the detected dimming level; and a light emitting element driving module for constant-current-controlling a plurality of light emitting element groups by comparing the detected dimming level with the phase modulation reference value, wherein the light emitting element driving module comprises a light emitting element current blocking unit for blocking a driving current supplied to the plurality of lighting emitting element groups when the dimming level is lower than the phase modulation reference value. Thus, the present invention can prevent flickering by blocking a driving current of the entirety of the plurality of light emitting element groups at a dimming level lower than a preconfigured phase modulation reference value, and can improve the compatibility of a dimmer by improving dimming characteristics changing according to characteristics of the triac dimmer.

Inventors:

LEE HYUNG JIN (KR)
KANG HYUN GU (KR)
HAN SANG WOOK (KR)

Application Number:

PCT/KR2015/005606

Publication Date:

December 17, 2015

Filing Date:

June 04, 2015

Export Citation:

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Assignee:

SEOUL SEMICONDUCTOR CO LTD (KR)

International Classes:

H05B37/02; H05B41/38; H05B44/00

Domestic Patent References:

WO2013183893A1	2013-12-12
WO2014073911A1	2014-05-15

Foreign References:

KR20130091456A	2013-08-19
US20120098505A1	2012-04-26
US20130049631A1	2013-02-28

Other References: