Non-linear feedback control of robust bi-color LED lighting

Albert T.L. Lee; Huanting Chen; Siew-Chong Tan; S.Y. (Ron) Hui

doi:10.1109/ECCE.2015.7310112

Non-linear feedback control of robust bi-color LED lighting

Albert T.L. Lee, Huanting Chen, Siew-Chong Tan, S.Y. (Ron) Hui

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

3 Citations (Scopus)

Abstract

Light-emitting diode (LED) technology involves highly complex interactions of heat, light, power and color. Dimming a bi-color LED system with color mixing feature will alter the power and junction temperatures, which in turn shift the color spectra of the LEDs. In this paper, a closed-loop control method based on the nonlinear empirical LED model is proposed for decoupling the dimming control and color control of a bi-color system comprising warm-white and cool-white LEDs. The proposed control scheme has been successfully implemented to provide highly precise and independent control of dimming and correlated color temperature (CCT). Even considering significant changes in ambient temperature, the maximum errors in luminous flux and CCT employing the proposed method are around 3% and 1.78% respectively while the corresponding errors using an existing linear duty-cycle control method are 20% and 27.5% respectively. © 2015 IEEE.

Original language	English
Title of host publication	2015 IEEE Energy Conversion Congress and Exposition (ECCE)
Publisher	IEEE
Pages	3215-3222
ISBN (Electronic)	978-1-4673-7151-3, 978-1-4673-7150-6
DOIs	https://doi.org/10.1109/ECCE.2015.7310112
Publication status	Published - 2015
Externally published	Yes
Event	7th Annual IEEE Energy Conversion Congress and Exposition (ECCE 2015) - Montreal, Canada Duration: 20 Sept 2015 → 24 Sept 2015

Publication series

Name	IEEE Energy Conversion Congress and Exposition, ECCE
ISSN (Print)	2329-3721
ISSN (Electronic)	2329-3748

Conference

Conference	7th Annual IEEE Energy Conversion Congress and Exposition (ECCE 2015)
Abbreviated title	IEEE Energy Conversion Congress & Expos 2015
Place	Canada
City	Montreal
Period	20/09/15 → 24/09/15

Funding

This work is supported by the Research Grant Council of Hong Kong under the Theme-Based Research Scheme (TBRS) T22-715/12N. The authors thank the University of Hong Kong for its financial support for the patent application [10].

Research Keywords

correlated color temperature (CCT)
light-emitting diodes (LED)
luminous flux
Non-linear feedback control

RGC Funding Information

RGC-funded

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10.1109/ECCE.2015.7310112

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Cite this

@inproceedings{b5ffe26e6a484157aa17d1a52cfdea49,

title = "Non-linear feedback control of robust bi-color LED lighting",

abstract = "Light-emitting diode (LED) technology involves highly complex interactions of heat, light, power and color. Dimming a bi-color LED system with color mixing feature will alter the power and junction temperatures, which in turn shift the color spectra of the LEDs. In this paper, a closed-loop control method based on the nonlinear empirical LED model is proposed for decoupling the dimming control and color control of a bi-color system comprising warm-white and cool-white LEDs. The proposed control scheme has been successfully implemented to provide highly precise and independent control of dimming and correlated color temperature (CCT). Even considering significant changes in ambient temperature, the maximum errors in luminous flux and CCT employing the proposed method are around 3% and 1.78% respectively while the corresponding errors using an existing linear duty-cycle control method are 20% and 27.5% respectively. {\textcopyright} 2015 IEEE.",

keywords = "correlated color temperature (CCT), light-emitting diodes (LED), luminous flux, Non-linear feedback control",

author = "Lee, {Albert T.L.} and Huanting Chen and Siew-Chong Tan and Hui, {S.Y. (Ron)}",

year = "2015",

doi = "10.1109/ECCE.2015.7310112",

language = "English",

series = "IEEE Energy Conversion Congress and Exposition, ECCE",

publisher = "IEEE",

pages = "3215--3222",

booktitle = "2015 IEEE Energy Conversion Congress and Exposition (ECCE)",

address = "United States",

note = "7th Annual IEEE Energy Conversion Congress and Exposition (ECCE 2015), IEEE Energy Conversion Congress & Expos 2015 ; Conference date: 20-09-2015 Through 24-09-2015",

}

Lee, ATL, Chen, H, Tan, S-C & Hui, SY 2015, Non-linear feedback control of robust bi-color LED lighting. in 2015 IEEE Energy Conversion Congress and Exposition (ECCE). IEEE Energy Conversion Congress and Exposition, ECCE, IEEE, pp. 3215-3222, 7th Annual IEEE Energy Conversion Congress and Exposition (ECCE 2015), Montreal, Quebec, Canada, 20/09/15. https://doi.org/10.1109/ECCE.2015.7310112

Non-linear feedback control of robust bi-color LED lighting. / Lee, Albert T.L.; Chen, Huanting; Tan, Siew-Chong et al.
2015 IEEE Energy Conversion Congress and Exposition (ECCE). IEEE, 2015. p. 3215-3222 (IEEE Energy Conversion Congress and Exposition, ECCE).

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

TY - GEN

T1 - Non-linear feedback control of robust bi-color LED lighting

AU - Lee, Albert T.L.

AU - Chen, Huanting

AU - Tan, Siew-Chong

AU - Hui, S.Y. (Ron)

PY - 2015

Y1 - 2015

N2 - Light-emitting diode (LED) technology involves highly complex interactions of heat, light, power and color. Dimming a bi-color LED system with color mixing feature will alter the power and junction temperatures, which in turn shift the color spectra of the LEDs. In this paper, a closed-loop control method based on the nonlinear empirical LED model is proposed for decoupling the dimming control and color control of a bi-color system comprising warm-white and cool-white LEDs. The proposed control scheme has been successfully implemented to provide highly precise and independent control of dimming and correlated color temperature (CCT). Even considering significant changes in ambient temperature, the maximum errors in luminous flux and CCT employing the proposed method are around 3% and 1.78% respectively while the corresponding errors using an existing linear duty-cycle control method are 20% and 27.5% respectively. © 2015 IEEE.

AB - Light-emitting diode (LED) technology involves highly complex interactions of heat, light, power and color. Dimming a bi-color LED system with color mixing feature will alter the power and junction temperatures, which in turn shift the color spectra of the LEDs. In this paper, a closed-loop control method based on the nonlinear empirical LED model is proposed for decoupling the dimming control and color control of a bi-color system comprising warm-white and cool-white LEDs. The proposed control scheme has been successfully implemented to provide highly precise and independent control of dimming and correlated color temperature (CCT). Even considering significant changes in ambient temperature, the maximum errors in luminous flux and CCT employing the proposed method are around 3% and 1.78% respectively while the corresponding errors using an existing linear duty-cycle control method are 20% and 27.5% respectively. © 2015 IEEE.

KW - correlated color temperature (CCT)

KW - light-emitting diodes (LED)

KW - luminous flux

KW - Non-linear feedback control

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M3 - RGC 32 - Refereed conference paper (with host publication)

T3 - IEEE Energy Conversion Congress and Exposition, ECCE

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EP - 3222

BT - 2015 IEEE Energy Conversion Congress and Exposition (ECCE)

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Y2 - 20 September 2015 through 24 September 2015

ER -

Non-linear feedback control of robust bi-color LED lighting

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