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Conference Paper: A model to design light emitting diodes matrix driven by constant current source

TitleA model to design light emitting diodes matrix driven by constant current source
Authors
KeywordsLife
Light Emitting Diode
Matrix
Model
Reliability
Temperature
Issue Date2009
PublisherIEEE.
Citation
IEEE 6th International Power Electronics and Motion Control Conference (IPEMC '09), Wuhan, China, 17-20 May 2009, p. 2527-2531 How to Cite?
AbstractIt is always desirable to operate LEDs within its designed maximum temperature for maximized life. For LEDs driven by a constant current source it is possible to improve LED life by putting more LEDs in parallel to share current and reduce temperature, but the cost would increase. This paper proposes a general LED model to estimate the relationship between temperature, operating current, luminous flux, life and reliability of light emitting diodes. This model can direct LED matrix design with respect to the required parameters. The model would help lighting designers to consider the driving current and number of LED in a lamp matrix in order to achieve the desired light flux, efficacy and life with desired cost. A method involved power electronic technique is proposed to form a dynamic matrix that can response to the changing ambient temperature. This allows the engineer to build the real desired matrix flexibly.
Persistent Identifierhttp://hdl.handle.net/10722/62070
ISBN

 

DC FieldValueLanguage
dc.contributor.authorTam, T-
dc.contributor.authorPong, MH-
dc.date.accessioned2010-07-13T03:53:17Z-
dc.date.available2010-07-13T03:53:17Z-
dc.date.issued2009-
dc.identifier.citationIEEE 6th International Power Electronics and Motion Control Conference (IPEMC '09), Wuhan, China, 17-20 May 2009, p. 2527-2531-
dc.identifier.isbn978-1-4244-3556-2-
dc.identifier.urihttp://hdl.handle.net/10722/62070-
dc.description.abstractIt is always desirable to operate LEDs within its designed maximum temperature for maximized life. For LEDs driven by a constant current source it is possible to improve LED life by putting more LEDs in parallel to share current and reduce temperature, but the cost would increase. This paper proposes a general LED model to estimate the relationship between temperature, operating current, luminous flux, life and reliability of light emitting diodes. This model can direct LED matrix design with respect to the required parameters. The model would help lighting designers to consider the driving current and number of LED in a lamp matrix in order to achieve the desired light flux, efficacy and life with desired cost. A method involved power electronic technique is proposed to form a dynamic matrix that can response to the changing ambient temperature. This allows the engineer to build the real desired matrix flexibly.-
dc.languageeng-
dc.publisherIEEE.-
dc.relation.ispartofIEEE International Power Electronics and Motion Control Conference (IPEMC)-
dc.rightsIEEE International Power Electronics and Motion Control Conference (IPEMC). Copyright © IEEE.-
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.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectLife-
dc.subjectLight Emitting Diode-
dc.subjectMatrix-
dc.subjectModel-
dc.subjectReliability-
dc.subjectTemperature-
dc.titleA model to design light emitting diodes matrix driven by constant current source-
dc.typeConference_Paper-
dc.identifier.emailPong, MH: mhp@eee.hku.hk-
dc.identifier.emailPong, MH: mhp@eee.hku.hk-
dc.identifier.authorityPong, MH=rp00163-
dc.identifier.authorityPong, MH=rp00163-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1109/IPEMC.2009.5157830-
dc.identifier.hkuros162731-
dc.identifier.spage2527-
dc.identifier.epage2531-
dc.publisher.placeWuhan, China-

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