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Conference Paper: A general photo-electro-thermo-temporal theory for light-emitting diode (LED) systems

TitleA general photo-electro-thermo-temporal theory for light-emitting diode (LED) systems
Authors
KeywordsLight-Emitting Diodes
Lighting Systems
Issue Date2010
Citation
2010 Ieee Energy Conversion Congress And Exposition, Ecce 2010 - Proceedings, 2010, p. 184-191 How to Cite?
AbstractThis paper presents a dynamic photo-electro-thermal theory for LED systems. In addition to photometric, electrical and thermal aspects, this theory incorporates the time domain into the generalized equations. A dynamic model for a general LED system is developed for system analysis. This theory highlights the fact that the luminous output of an LED system will decrease with time from the initial operation to the steady-state due to the rising temperature of the heatsink and the LED devices. The essential thermal time constants involved in the LED systems are explained. The time factor is critical in understanding how much the luminous output will decrease with time and is essential to the optimal designs of LED systems that are operated continuously (e.g general lighting) or momentarily (e.g. traffic lights). Experiments on several LED systems at different time frames have been conducted and the practical measurements confirm the validity of this theory. © 2010 IEEE.
Persistent Identifierhttp://hdl.handle.net/10722/158660
References

 

DC FieldValueLanguage
dc.contributor.authorTao, Xen_US
dc.contributor.authorHui, SYRen_US
dc.date.accessioned2012-08-08T09:00:43Z-
dc.date.available2012-08-08T09:00:43Z-
dc.date.issued2010en_US
dc.identifier.citation2010 Ieee Energy Conversion Congress And Exposition, Ecce 2010 - Proceedings, 2010, p. 184-191en_US
dc.identifier.urihttp://hdl.handle.net/10722/158660-
dc.description.abstractThis paper presents a dynamic photo-electro-thermal theory for LED systems. In addition to photometric, electrical and thermal aspects, this theory incorporates the time domain into the generalized equations. A dynamic model for a general LED system is developed for system analysis. This theory highlights the fact that the luminous output of an LED system will decrease with time from the initial operation to the steady-state due to the rising temperature of the heatsink and the LED devices. The essential thermal time constants involved in the LED systems are explained. The time factor is critical in understanding how much the luminous output will decrease with time and is essential to the optimal designs of LED systems that are operated continuously (e.g general lighting) or momentarily (e.g. traffic lights). Experiments on several LED systems at different time frames have been conducted and the practical measurements confirm the validity of this theory. © 2010 IEEE.en_US
dc.languageengen_US
dc.relation.ispartof2010 IEEE Energy Conversion Congress and Exposition, ECCE 2010 - Proceedingsen_US
dc.subjectLight-Emitting Diodesen_US
dc.subjectLighting Systemsen_US
dc.titleA general photo-electro-thermo-temporal theory for light-emitting diode (LED) systemsen_US
dc.typeConference_Paperen_US
dc.identifier.emailHui, SYR:ronhui@eee.hku.hken_US
dc.identifier.authorityHui, SYR=rp01510en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1109/ECCE.2010.5618047en_US
dc.identifier.scopuseid_2-s2.0-78650100334en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-78650100334&selection=ref&src=s&origin=recordpageen_US
dc.identifier.spage184en_US
dc.identifier.epage191en_US
dc.identifier.scopusauthoridTao, X=36086850500en_US
dc.identifier.scopusauthoridHui, SYR=7202831744en_US

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