led历史毕业论文外文文献翻译

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1、外文资料原文LEDhistory50yearsago,peoplehavetounderstandsemiconductormaterialscanproducelightofthebasicknowledge，thefirstcommercialdiodesin1960.EnglishistheLEDlightemittingdiode(LED)acronym，anditsbasicstructureisanelectroluminescentsemiconductormaterials，placedinawirerack,thensealedwithepoxyresi

2、naround,thatis，solidpackage,Therefore，theprotectionoftheinternalbatteriescanplaytheroleofline,sotheseismicperformanceLEDgood.LEDisthecoreoftheP-typesemiconductorandcomponentsoftheN-typesemiconductorchips，theP-typesemiconductorandN-typesemiconductorbetweenatransitionlayers，calledthePNjunct

3、ion.InsomesemiconductormaterialsinthePNjunction，theinjectionofasmallnumberofcarrier-carrierandthemajorityoftheextratimewillbeintheformoflightenergytorelease，thusthepowertodirectconversionofsolarenergy.PNjunctiononreversevoltage，afewhard-carrierinjection,itisnotluminous.Thisuseofinjectione

4、lectroluminescentdiodesisproducedbytheprincipleoflight-emittingdiodes，commonlyknownasLED.Whenitinapositivestateofthework(thatis，atbothendswithforwardvoltage),thecurrentflowsfromtheLEDanode,cathode，semiconductorcrystalsontheissuefromtheultraviolettoinfraredlightofdifferentcolors，lightandth

5、estrengthofthecurrents.InstrumentsusedforthefirstLEDlightsourceinstructions，butallkindsoflightcoloredLEDlightsintrafficandlargescreenhasbeenwidelyapplied，haveverygoodeconomicandsocialbenefits.The12-inchredtrafficlightsasanexample，isusedintheUnitedStateshavelonglife,low-efficiency140wattin

6、candescentlampasalightsource，itproduced2,000lumensofwhitelight.Theredfilter，theloss-90percent,only200lumensofredlight.Inthelightofthenewdesign，Lumiledscompanieshave18redLEDlightsource，includingthelossofcircuit，atotalpowerconsumptionof14wattstogeneratethesameopticaleffect.AutomotiveLEDligh

7、tsarealsothesourceofimportantareas.Forgenerallighting，peopleneedmorewhitelightsources.The1998whiteLEDsuccessfuldevelopment.ThisistheGaNLEDchipandYttriumAluminumGarnet(YAG)packagetogethercause.GaNchipoftheBlu-ray(Xp=465nm，Wd=30nm)，madeofhigh-temperaturesinteringofthe