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Article: Precise Dimming and Color Control of Light-Emitting Diode Systems based on Color Mixing

TitlePrecise Dimming and Color Control of Light-Emitting Diode Systems based on Color Mixing
Authors
KeywordsBicolor light-emitting diode (LED) lamp
Closedloop nonlinear approach
Correlated color temperature (CCT)
Dimming
Light control
Issue Date2016
PublisherInstitute of Electrical and Electronics Engineers. The Journal's web site is located at http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=63
Citation
IEEE Transactions on Power Electronics , 2016, v. 31 n. 1, p. 65-80 How to Cite?
AbstractThis paper proposes a closed-loop nonlinear scheme for precisely controlling the luminosity and correlated color temperature (CCT) of a bicolor adjustable light-emitting diode (LED) lamp. The main objective is to achieve a precise and fully independent dimming and CCT control of the light mixture emitted from a two-string LED lamp comprising warm-white and cool-white color LEDs, regardless of the operating conditions and throughout the long operating lifetime of the LED lamp. The proposed control method is formulated using the nonlinear empirical LED model of the bicolor white LED system. Experimental results show that with the proposed closed-loop nonlinear approach, both CCT and dimming control of the bicolor lamp is significantly more accurate and robust to ambient temperature variations, ambient light interference, and LED aging than the conventional linear approach used in existing products. The maximum error in luminous flux employing the proposed closed-loop nonlinear approach is 3%, compared with 20% using the closed-loop linear approach. The maximum deviation in CCT is only 1.78%, compared with 27.5% with its linear counterpart. © 2015 IEEE.
Persistent Identifierhttp://hdl.handle.net/10722/210733
ISSN
2023 Impact Factor: 6.6
2023 SCImago Journal Rankings: 3.644
ISI Accession Number ID
Grants

 

DC FieldValueLanguage
dc.contributor.authorLee, TLA-
dc.contributor.authorChen, H-
dc.contributor.authorTan, SC-
dc.contributor.authorHui, SYR-
dc.date.accessioned2015-06-23T05:48:50Z-
dc.date.available2015-06-23T05:48:50Z-
dc.date.issued2016-
dc.identifier.citationIEEE Transactions on Power Electronics , 2016, v. 31 n. 1, p. 65-80-
dc.identifier.issn0885-8993-
dc.identifier.urihttp://hdl.handle.net/10722/210733-
dc.description.abstractThis paper proposes a closed-loop nonlinear scheme for precisely controlling the luminosity and correlated color temperature (CCT) of a bicolor adjustable light-emitting diode (LED) lamp. The main objective is to achieve a precise and fully independent dimming and CCT control of the light mixture emitted from a two-string LED lamp comprising warm-white and cool-white color LEDs, regardless of the operating conditions and throughout the long operating lifetime of the LED lamp. The proposed control method is formulated using the nonlinear empirical LED model of the bicolor white LED system. Experimental results show that with the proposed closed-loop nonlinear approach, both CCT and dimming control of the bicolor lamp is significantly more accurate and robust to ambient temperature variations, ambient light interference, and LED aging than the conventional linear approach used in existing products. The maximum error in luminous flux employing the proposed closed-loop nonlinear approach is 3%, compared with 20% using the closed-loop linear approach. The maximum deviation in CCT is only 1.78%, compared with 27.5% with its linear counterpart. © 2015 IEEE.-
dc.languageeng-
dc.publisherInstitute of Electrical and Electronics Engineers. The Journal's web site is located at http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=63-
dc.relation.ispartofIEEE Transactions on Power Electronics-
dc.rightsIEEE Transactions on Power Electronics . Copyright © Institute of Electrical and Electronics Engineers.-
dc.rights©20xx IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.-
dc.subjectBicolor light-emitting diode (LED) lamp-
dc.subjectClosedloop nonlinear approach-
dc.subjectCorrelated color temperature (CCT)-
dc.subjectDimming-
dc.subjectLight control-
dc.titlePrecise Dimming and Color Control of Light-Emitting Diode Systems based on Color Mixing-
dc.typeArticle-
dc.identifier.emailLee, TLA: tlalee@hku.hk-
dc.identifier.emailChen, H: htchen@eee.hku.hk-
dc.identifier.emailTan, SC: sctan@eee.hku.hk-
dc.identifier.emailHui, SYR: ronhui@eee.hku.hk-
dc.identifier.authorityTan, SC=rp01606-
dc.identifier.authorityHui, SYR=rp01510-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1109/TPEL.2015.2448641-
dc.identifier.scopuseid_2-s2.0-84942860804-
dc.identifier.hkuros244155-
dc.identifier.volume31-
dc.identifier.issue1-
dc.identifier.spage65-
dc.identifier.epage80-
dc.identifier.isiWOS:000361908600009-
dc.publisher.placeUnited States-
dc.relation.projectSustainable Lighting Technology: From Devices to Systems-
dc.identifier.issnl0885-8993-

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