LED的发展与应用毕业论文外文翻译.docx
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LED的发展与应用毕业论文外文翻译.docx
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LED的发展与应用毕业论文外文翻译
ThedevelopmentandapplicationofLED
Asthefurtherdevelopmentofdisplaydeviceandtechnology,screendisplaysystemhasbeenwidelyusedinnationaleconomy,LEDdisplayasacarrierfordisplayinginformationisoneofmajormedia.LEDdisplayiscomposedbyusingLEDlatticemoduleorpixelunit.
Ascomputertechnologydeveloped,LEDdigitalhasthecharacteristicsofhighreliability,longlife,highcostperformance,lowusingcost,stronglyadaptivecapacitytoenvironmentwhichcanbedirectlydrivenwithoutreducingdrive,therefore,ithasbeenplayingaimportanceroleinthefieldofflatdisplay.andforalongperiodoftime,thereareconsiderableroomfordevelopment.So,itwidelyusedinthefinancialmarkets,hospitals,stadiums,airports,terminals,stations,highwaysandotherpublicplacesforinformationdisplayandadvertising.
FirstLEDSummary
LED(LightEmittingDiode),light-emittingdiode,isasolidstatesemiconductordevices,whichcanbedirectlyconvertedintoelectricitytolight.LEDistheheartofasemiconductorchip,thechipisattachedtooneendofastent,isthenegativeside,theotherendofthepowerofthecathode,theentirechippackagetobeepoxyresin.Semiconductorchipiscomposedoftwoparts,partoftheP-typesemiconductor,itinsidethehole-dominated,theothersideistheN-typesemiconductor,hereismainlyelectronic.Butlinkingthetwosemiconductors,amongthemtheformationofa"PNjunction."Whenthecurrentthroughthewiresroleinthischip,willbepushinge-P,Pzoneintheholewithelectroniccomposite,andthentobeissuedintheformofphotonenergy,andthisistheprincipleofLEDluminescence.Thewavelengthoflightthatisthecoloroflight,isformedbythePNjunctionofthedecisionsofthematerial.
SecondLEDdevelopment
ThedevelopmentofLEDdisplaycanbedividedintothefollowingphases:
firstphase1990to1995,mainlymonochromeand16colorgraphicsscreen.Usedtodisplaytextandsimpleimages,mainlyusedinrailwaystations,financialsecurities,banks,postofficesandotherpublicplaces,aspublicinformationdisplaytools.
Thesecondstageisfrom1995to1999,therehavebeen64,256levelgray-scaletwo-colorvideoscreen.Videocontroltechnology,imageprocessing,opticalfibercommunicationtechnologyapplicationswillenhancetheLEDdisplaytoanewlevel.LEDdisplaycontrolLSIchipsspecialatthistimedevelopedbydomesticcompanies,andcanbeapplied.
Thethirdstage,from1999,red,puregreen,blueLEDinbulkintoChina,whiledomesticenterprisesin-depthresearchanddevelopmentwork,usingred,green,andblueLEDproductionoffull-colordisplayhasbeenwidelyused,pouredintosportsstadiums,conventioncenters,squaresandotherpublicplaces,whichwillbringthedomesticlarge-screenfull-colorera.
ThirdLEDadvantages
Conductorlight-emittingdiode(LED)asathird-generationsemiconductorlightingsource.Thisfantasticproducthasalotofadvantages:
(1)efficientlight:
spectraofalmostallconcentratedinthevisiblelightfrequency,theefficiencycanreach80%-90%.Theluminousefficiencyofincandescentvisiblelightefficiencyofalmost10%-20%only.
(2)highqualityoflight:
notasaresultofspectrumUVandinfrared,thereisnoheat,noradiation,istypicallyagreenlightillumination.(3)energyconsumptionofthesmall:
singlepowergenerally0.05-1w,throughtheclustercanbetailoredtomeetdifferentneeds,andwasteverylittle.Asalightsource,underthebrightnessinthesamepowerconsumptionofonlyordinaryincandescent1/8-10.(4)longlife:
fluxattenuationto70%ofthestandardlifeexpectancyis100,000hours.Asemiconductorlightcanbeusedundernormalcircumstances50years,evenifthelonglifeofthepeople,lifewillbeuseduptotwolights.(5)durableandreliable:
Notungstenwire,glassandothereasilydamagedcomponents,non-normalretirementrateisverysmall,verylowmaintenancecosts.(6)theapplicationofflexibility:
smallsize,canflatpack,easytodevelopintoashortthinproducts,makepoint,line,facevariousformsofspecificapplications.(7)Security:
workingvoltage1.5-5vorlessinbetweenthecurrent20-70mAinbetween.(8)green:
recyclablewaste,nopollution,unlikefluorescentlampscontainingmercuryasingredients.(9)responsetimeisshort:
toadapttofrequentandhigh-frequencyswitchingoperationofoccasions.
Inrecentyears,China'sLEDdisplayrelatedtechnologyhasalsobeenmadeafastandgreatdevelopment,BecauseofearlystageLEDmaterialandcomponentrestriction,LEDdisplayapplicationswerenotwidelyexpand.Theotherhand,displaycontroltechnologybasicallyisacommunicationcontrolmethodwhichobjectivelyaffectsthedisplayeffect.ThusresultingintheearlyLEDdisplaysinthecountryrarely,productbasedondoubleprimarycolorwhichisgreenandred,communicationcontrol,graylevelissinglepointoffourtonegray,highcost.Later,therapiddevelopmentofLEDdisplayinthenineties,theglobalinformationindustryisgrowingrapidly,informationtechnologycontinuetomakebreakthroughsinvariousfields,LEDdisplayintheLEDmaterialsandcontroltechnologyhasalsobeentheemergenceofnewresults.ThesuccessfuldevelopmentofblueLEDlens,full-colorLEDdisplaytoenterthemarket;thefieldofcomputerandmicroelectronicstechnologydevelopmentinthefieldofdisplaycontroltechnology,thevideocontroltechnology,thescreendynamicdisplayeffectofgreatlyincreased.Inthisstage,LEDdisplayinChinahasdevelopedrapidly,LEDdisplayindustryturnintoanewhigh-techindustry.Today,LEDdisplayusedinbroaderfield,hereIwilltalkmypointabouttheLEDinthehotelandleisurefieldapplications.
I.LEDdisplayoftheeffectivenessofthehotel
LEDelectronicdisplayisthefourthlargestadvertisingmediaaftertelevision,newspaper,network.Itwillbringtangiblesocialbenefitsforinvestorsandeconomicbenefits,LEDelectronicdisplaycanbereceivedfromthecomputer,TV,VCR,VCD,videocamerasandotherinformationtransmitted,andplaydimensionalorthree-dimensionalanimation,textinformationatanytime.
Witheconomicgrows,Acceleratedpaceofsocialworklife,thehotelinpeople'slivesplaysaindispensablerole.Hotelisalargepopulationflowintodaywhereitisasocialgatheringplaceforcelebrities,ofcourse,itisthewindowwhichneedsinformationfastest,mostaccurateandhuge.LEDelectronicdisplaywillbefullofyourcustomer'sdemandforinvestorswithahuge,immeasurable,long-termsocialandeconomicbenefits.
1.Social
A,promotethehotel'sservicesandpreferentialpoliciestoenhancethehotel'simage.
B,promotethehotel's"servicecommitment"andothercontent,enhancingitsvisibility.
C,beautifythehotelenvironment,toimprovetheirgradesandthetasteismoreconducivetoattractingmorecustomersafriend.
D,Providingconveniencetoourcustomers.
2.Economic
Thetwenty-firstcentury,ahighlyinformation-orientedera,corporateawarenessoftheadvertisementshasneverbeensostrongandisgrowing;Hotelsflow-intensive,informationrequirementswide;LEDelectronicdisplay,ahighinformationcontentofthedisplaymedium,atheworld'sbestadvertisingmedia,canbe,within365daysayeartoundertakeavarietyofadvertisinganunlimitednumberofforeignbusiness;Ingoodoperation,willobviouslyabouttocreaterisingprosperityhasbroughtenormouseconomicbenefits.Guangzhou,ChinaTradeFairExhibitionHallnexttoalargefull-colorscreen,atanannualtensofmillionsofdollarsinadvertisingrevenueforinvestorsrollinginwealth;XiamenEgretPlazaonthestateoflarge-scalefull-color,injustthreeyearstime,therecoveryofmorethan500millionyuanoftotalinvestment,andisnearly200millionayearnetprofitfortheinvestorssteadyflowofeconomicbenefits.
Theforegoinganalysis,theGrandHoteltoconfigurealargeLEDelectronicdisplay,willgiveyouandyourguestswithhuge,long-term,goodsocialandeconomicbenefits,playadouble-edgedswordeffect.
Ⅱ.TheroleofhotelLEDdisplay
1.Heatthehotelmood.
Throughthedisplayscreentoplaythehigher-upsandallkindsofguestscometovisit,guidewordsofwelcome,avarietyofmajorfestivalssuchascelebrationoftheword.
2.Knowledgespreading
A,throughtheLEDelectronicdisplaythatcanplayavarietyoflaws,rules,regulationsandallkindsofknowledgeandsoon.
B,throughtheLEDelectronicdisplaycanplayhotelnewserviceintroduction;thehotel's"servicecommitment"andsoon.
3.Playtheroleofbulletinboards.
Throughthedisplayscreencanbebroadcastlectures,meetingsofthenotice,allnotices,jobplacementandadvancedindividuals,theHallofFameandadvanceddeedsandsoon.
4.playedtheroleofpublicserviceads.
①,throughthedisplayscreencanbebroadcastweatherforecasts;
②,localculture,history,geography,climateprofiles,localcustomsandhabits;
③,localmaps,touristtrafficmapandvarioustouristspots,maps;
④,"civilizedcitizensoftheConvention",thehotel'ssloganandimportantnews.
5.Creationofwelleconomicbenefits
Astheworld'sbestadvertisingmedia,alsocarryadvertisementsofmajorcompanies,(theproposeddual-colororfullcolor,sothatthecontentdisplayedontherichandcolorful,moreattractiontomajorcompaniesandunitsundertakeactivitiesanddoingadvertising,enhancethehoteltobewellknown,fullyreflectthegradeofthehotel).
OverallLEDdisplayinthehotelfortheadvancementofhotelservicestothepublicimage,reputation,servicegrade,andcreateacivilizedwindow.
Ⅲ.ThecharacteristicsofLEDdisplay
1.Displayisofbri
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