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 Wysłany: Czw 14:05, 02 Gru 2010 Temat postu: MAC Cosmetics Cheap A high-power LED light source |
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A high-power LED light source module calculating junction temperature method
pplications: lightemittingdiodes. In: P. IEEEIntersocietyConf. ThermalPhenome-Ha,MAC Cosmetics Cheap, SanDiego,MAC 180 color eyeshadow, CA, 2002.113 [3] GuYM, NarendranN. 2004. Anon-contactmethodforde-temfiningjunctiontemperatureofphosphor-convertedwhiteLEDs. In: ProceedingsofSPIE5187, ThirdInternationalCon-ferenceonSolidStateLighting. SanDiego, CA,mbt fora shoes, 2003.107 [4] ApplicationBriefAB05. ThermaldesignusingLuxeonpowerlightsources. http://www. 1unfileds. tom: LunfiledsLighting, 2003 [5] Heat Exchangers. Key and difficult and the typical heat transfer problem fine solution. Xi'an: Xi'an Jiaotong University Press, 2001 [6] SofiaJW. Electricalthermalresistancemeasurementsforhy-bridsandmulti-chipspackages. http://www. analysistech. con: AnalysisTech,puma kart cat, 2001 [7] China Optics and Optoelectronics Manufactures Association optoelectronic devices branch. Light-emitting diode testing. Industry standards, Q/GD0l a 2003.2003Amethodforcalculatingjunctiontemperatureofhigh-powerLEDsoflightsourcemodulesYuBinhai. FangFubo (FoshanNationStarOptoelectronicsCo., Ltd, Foshan528000) AbstractTheinfluenceofheatexchangebetweenhigh-powerLEDsinalightsourcemoduleisstudied. TheformulationofPNjunctiontemperatureofmultiplehigh-powerLEDsissetupbasedonthermalresistancematrix. ThenthecalculationmethodofthermalresistancematrixbymeasuringforwardvoltagesofLEDsisdescribed. Finally,MBT shoes sale, junctiontemperatureofeachhigh-powerLEDiscalculatedbytakingalightSOUl ~ emoduleoffive1wattLEDsasanexample. Theresultindi-catesthatthearithmeticismoreaccuratethantheformeroneinjunctiontemperaturecalculationofhigh-powerLEDsoflightsourcemodules. Itcouldbeappliedtotheevaluationoflifetimeandsystemreliabilityoflightsourcemodulesinen-gineeringapplications. Keywords: thermalresistancematrix, PNjunctiontemperature, LEDlightSourcemodule, high-powerLEDs a 52 -
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