【精品】半导体照明基础知识.doc

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1、Solid-StateLightingBasicsWhySSLSince2003,theU.S.DepartmentofEnergyhasinvestedwithindustrypartnersinresearchanddevelopmentofsolid-statelighting(SSL)—includingbothlight-emittingdiode(LED)andorganiclightemittingdiode(OLED)technologies・WhysuchconcentratedattentiononSSL?Theanswerissimple:bec

2、auseofSSUsrapidongoingimprovementsandsuperiorenergy-savingpotential/^・ItisestimatedthatswitchingtoLEDlightingoverthenexttwodecadescouldsavethecountry$250billioninenergycostsoverthatperiod,reducetheelectricityconsumptionforlightingbynearlyonehalf,andavoid1,800millionmetrictonsofcarbonemi

3、ssion.1DOEisnotaloneinrecognizingtheimportaneeofthatkindofsavings;Congressrecognizesittoo,whichiswhytheEnergyPolicyActof2005mandatesDOEtoaccelerateSSLtechnology.TheefficacyofLEDlightsourceshasalreadysurpassedthatofincandescentfhalogen,highintensitydischarge,andlinearfluorescentlamps’and

4、willcontinuetoimprove.By2020,LEDluminaireswillbecapableofluminaireefficaciesapproach!ng170lm/Wrmorethantwicethatofatypicalfluorescentfixture.Thesamplingofhigh-efficiencyproductsshownonthegraphaboveachieveanaverageof85lm/Wzwitharangeof70-120Im/W.Source:DOELEDLightingFactsproductlist;DOES

5、SLR&DMulti•丫earProgramPlananalysisThatdoesn'tmeanDOEhasabandonedlightingcontrolsandotherlightsourcetechnologies,however.DOEstillinveststoalargedegreeinpromotingthemostefficientformsofconventionallightingtechnologies,throughsuchimplementationprogramsasBuildingAmerica,theCommercialBuildin

6、gsIntegrationProgram,andtheFederalEnergyManagementProgram・AvoidingtheRoadblocksDOEiskeepingaclosewatchonsolid-statelighting,inboththelabandthemarketplace,tomakesureitdoesrftrunintothesameroadblocksthatslowedmarketacceptsneeofcompactfluorescentlamps・(CFLs)backinthe1990s・Acceleratingthepa

7、ceofcommercializationforSSLwillhingeonimprovingcostcompetitivenessandquality.•Improvingcostcompetitiveness.OnemajorroadblockforSSLiscost.Today,thepurchasepriceofLEDlightingproductsisgenerallyhigherthanthatoftheirconventionalcounterparts,oftenbyalongshot,andtheenergysavingsoften