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1、附录AResearch&FabricationofPackagingTechnologyforHighPowerWhiteLEDComparingwiththetraditionalincandescentandfluorescentlighting,thehighPowerwhiteLEDhasmanysignificantincomparableadvantagessuchasenergysaving,envirorunentalprotection,longlifeandsoon.Itrepresentsthedevelopmentdir
2、ectionofgreenlighting,andismovingintothefieldoflightingrapidly.Fromthepackagingtechnologyof1Whigh-bowerwhiteLED,thecostandperformanceofseveralmethodswereanalyzedandcomparedforwhitelightLED.Basedonthis,usingthe“bluechip&YAGphosphor"forproducingwhitelightLEDisthefinalselection
3、withitsgoodperfounanceandproperprice.Theresultsshowthatinimprovingthelightemittingefficiency,unilounityandstabilityofhigh-powerwhiteLED,itneedsfurtherdevelopmentofnewmaterialsandnewtechnology.IntroductionLEDusesemiconductorchipsofsolidaslightemittingmaterials,theuseofelectri
4、clight-emitting.Asalightsource,LED'sadvantagesisinenergysaving,environmentalprotectionandlong-livedthreeaspects.LEDdoesnotdependonheatingfilamenttolight-emitting,energyconversionefficiencyisveryhigh,intheoryonly10%oftheenergyconsumptionofincandescent.comparedwithfluorescent,
5、LEDcanbeupto50%oftheenergysavingeffect.SpecialsurveyshowedthattheannualelectricityconsumptionofChina'slightingismorethan300billion,toreplaceallincandescentlampswithLEDorinpartortoreplacethefluorescentlamp,cansave1/3ofthelightingelectricity,meansthatthesavingof1000billionkwh,
6、representingthefull-year'sgeneratingcapacityofThreeGorgesProjectwhichinvestmentofmorethan200billion.UsingLEDtoreplacefluorescentlamps,bamboolampstoavoidthebreakdownofaspillofmercurypollution,moreoverwasteandmanufacturingbackplaneLED(CopperCladAluminum)reusecanberecycled.LEDb
7、ysolidpackage,thestructureisdeep-set,lifeexpectancycanbeuptoh.Inaddition,LEDalsohasalowoperatingvoltage,powerconsumptioninsmall,highluminousefficiency,responsetimeisveryshort(ns-grade),purelightcolor,lightweight,smallsize,suchasaseriesofcharacteristicsofrapiddevelopment,espe
8、ciallyhigh-powerhigh-brightnesswhitelightLEDoftheinvention,bytheinsiderasth
