点阵LED外文翻译3000字文献.docx

点阵LED外文翻译3000字文献.docx

《点阵LED外文翻译3000字文献.docx》由会员分享，可在线阅读，更多相关《点阵LED外文翻译3000字文献.docx（9页珍藏版）》请在冰豆网上搜索。

点阵LED外文翻译3000字文献

BasedonAT89C52LEDoverview

LED（LightEmittingDiode）,light-emittingdiode,isasolidstatesemiconductordevices,whichcanbedirectlyconvertedintoelectricitytolight.LEDistheheartofasemiconductorchip,thechipisattachedtooneendofastent,isthenegativeside,theotherendofthepowerofthecathode,theentirechippackagetobeepoxyresin.Semiconductorchipisposedoftwoparts,partoftheP-typesemiconductor,itinsidethehole-dominated,theothersideistheN-typesemiconductor,hereismainlyelectronic.Butlinkingthetwosemiconductors,amongthemtheformationofa"PNjunction."Whenthecurrentthroughthewiresroleinthischip,willbepushinge-P,Pzoneintheholewithelectronicposite,andthentobeissuedintheformofphotonenergy,andthisistheprincipleofLEDluminescence.Thewavelengthoflightthatisthecoloroflight,isformedbythePNjunctionofthedecisionsofthematerial.

LEDhistory50yearsago,peoplehavetounderstandsemiconductormaterialscanproducelightofthebasicknowledge,thefirstmercialdiodesin1960.EnglishistheLEDlightemittingdiode（LED）acronym,anditsbasicstructureisanelectroluminescentsemiconductormaterials,placedinawirerack,thensealedwithepoxyresinaround,thatis,solidpackage,Therefore,theprotectionoftheinternalbatteriescanplaytheroleofline,sotheseismicperformanceLEDgood.

LEDisthecoreoftheP-typesemiconductorandponentsoftheN-typesemiconductorchips,theP-typesemiconductorandN-typesemiconductorbetweenatransitionlayer,calledthePNjunction.InsomesemiconductormaterialsinthePNjunction,theinjectionofasmallnumberofcarrier-carrierandthemajorityoftheextratimewillbeintheformoflightenergytorelease,thusthepowertodirectconversionofsolarenergy.PNjunctiononreversevoltage,afewhard-carrierinjection,itisnotluminous.Thisuseofinjectionelectroluminescentdiodesisproducedbytheprincipleoflight-emittingdiodes,monlyknownasLED.Whenitinapositivestateofthework（thatis,atbothendswithforwardvoltage）,thecurrentflowsfromtheLEDanode,cathode,semiconductorcrystalsontheissuefromtheultraviolettoinfraredlightofdifferentcolors,lightandthestrengthofthecurrents.

InstrumentsusedforthefirstLEDlightsourceinstructions,butallkindsoflightcoloredLEDlightsintrafficandlargescreenhasbeenwidelyapplied,haveaverygoodeconomicandsocialbenefits.The12-inchredtrafficlightsasanexample,isusedintheUnitedStateshavelonglife,low-efficiency140wattincandescentlampasalightsource,itproduced2,000lumensofwhitelight.Theredfilter,theloss-90percent,only200lumensofredlight.Inthelightofthenewdesign,Lumiledspanieshave18redLEDlightsource,includingthelossofcircuit,atotalpowerconsumptionof14wattstogeneratethesameopticaleffect.AutomotiveLEDlightsisalsothesourceofimportantareas.

Forgenerallighting,peopleneedmorewhitelightsources.The1998whiteLEDsuccessfuldevelopment.ThisistheGaNLEDchipandYttriumAluminumGarnet（YAG）packagetogethercause.GaNchipoftheBlu-ray（λp=465nm,Wd=30nm）,madeofhigh-temperaturesinteringoftheCe3+YAGphosphorsexcitedbythisBlu-rayafterirradiatingayellow,thepeak550nm.Blue-chipinstalledintheLED-basedWanxingreflectioninthecavity,coveredwitharesinmixedwithYAGthinlayer,about200-500nm.LED-basedtabletsissuedbytheBlu-rayabsorptionpartofthephosphor,thephosphoranotherpartoftheBlu-rayandayellowlightmixed,canbeawhite.Now,theInGaN/YAGwhiteLED,YAGphosphorbychangingthechemicalpositionofthephosphorlayerandadjustthethicknessofthe3500-10000Kcolortemperaturecanbecoloredwhite.ThisblueLEDthroughthemethodbywhite,constructedsimple,low-cost,hightechnologyismature,sousethemost.

Inthe1960s,theuseofscienceandtechnologyworkerssemiconductorPNjunctionofTheprincipleofdevelopingaLEDlight-emittingdiodes.Atthattime,thedevelopmentofLED,thematerialsusedareGaASP,itsluminouscolorisred.Afternearly30yearsofdevelopment,andnowweareveryfamiliarwiththeLED,hasbeensenttored,orange,yellow,green,blue,andothershade.HoweverlightingnecessaryforwhiteLEDlightonlyinrecentyearstodevelop,readersheretotellusaboutlightingwithwhiteLED.

TheLEDdisplayscreenandvideodisplayintothetextbyLEDmatrixblocks.Graphicdisplaycanbedisplayedwithputer,English,Chinesetextandgraphics,Videoscreenusingmicroputercontrol,graphic,image,withreal-time,synchronization,clearinformationdisseminationwayplayallkindsofinformation,butalsoshows2d,3danimation,videos,TV,VCDprogramsandlive.TheLEDdisplayscreendisplaybrightcolors,stereosenseisstrong,suchasoil,suchasfilms,widelyusedinfinance,taxation,industryandmerce,telemunications,sports,advertising,corporations,transportation,educationsystem,station,port,airport,hospital,shoppingmalls,hotels,Banks,securitiesmarket,market,andconstructionmanagementofindustrialenterprises,Christie'sandotherpublicplaces.

TheLEDdisplaycandisplaythechangeofdigitalimage;text,graphics,Notonlycanbeusedforindoorenvironmentcanalsobeusedinoutdoorenvironment,projectors,LCDTVwall,andtheinparableadvantages.

LEDbythewideattentionandrapiddevelopment,anditistheadvantagesofitself.Theseadvantagesinis:

highbrightness,workingvoltage,lowconsumption,miniaturization,impactresistanceandlongservicelifeandstableperformance.LEDthedevelopmentprospect,iscurrentlytowardsahigherbrightness,higherresistancetoclimate,higherandhigherlightshinedensityevenness,reliability,thedirectionofdevelopment.Full-color

TheclassificationoftheLEDdisplay

1,thecolorcanbedividedintogezer

Thesinglecolordisplay:

singlecolors（redorgreen）.

Doublecolors:

redandgreenscreen,doublecolorsgray,canshow256levels65536colors.

Full-colordisplay:

red,green,andblue,graylevel256gezerfull-colordisplayscreencanshowmorethan1,600colors.

2,accordingtotheclassificationofdisplaydevices

LEDdigitaldisplay:

displaydeviceforsevenyards,suitableformakingtheclockdisplayscreen,interestrates,digitalelectronicdisplayscreen.

PicturesofLEDdotmatrixLCDdisplaydeviceisposedofmany:

evenlyposedoflightemittingdiodematrixdisplaymodule,suitableforbroadcasttext,imagesofinformation.

LEDvideodisplay:

displaydeviceisposedbymanylight-emittingdiodes,video,animationshowsvariousvideofiles.

3,byusingoccasionsclassification

Indoordisplay:

lightpointislesser,generalΦ3mm-Φ8mm,displayareaofgeneralseveraltensquaremetersto.

Outdoorscreenareatoseveralhundredsquaremetersgeneraldozens,highbrightness,canworkunderthesun,inthewind,rain,waterprooffunction.

4points,accordingtotheclassificationoflightindiameter

Indoorscreens:

Φ3mm,Φ3.75mm,Φ5mm,

Outdoorscreen:

Φ10mm,Φ12mmandΦ16mmΦ,19mm,Φ20mm,Φ21mm,Φ22mm,Φ26mm

Thebasicunitofthelightoutdoorscreenforledlightconetube,theprincipleisagroupofred,green,andbluelightemittingdiodesealedinaplastictubeinmon

5.Displayhorizontallyscrolling,static,verticalscrollandflipshows,etc.Singleblockmodulecontroldrive12（maximumcontrolandblock）,16X48matrix8X8matrix（or32X48matrix）,isasingleblockofMAX7219（orPS7219,HD7279,ZLG72898279andothersimilarLEDdisplaydrivermodule）12times（or24times）!

Canuse"cascade"meansanybitmapbigscreenposed.Showgoodeffect,lowconsumption,andthecostofusingMAX7219circuitislower.

TheLEDdisplayinspectionmethod,

Seeappearance,specifications,screenbodyflatness,screentheattachmentwithin

2lookbad,afterthelightscreenisnotinscope,thescreen（generallynowbasicallyno）

Colorconsistency,displaystextdisplayisnormal,thepicturetoscreen,full-colorplaywhite,red,greenandblue.

Technicaladvantage

Existingmonindoorfull-colorschemeparison:

1thematrixmodules:

design,colordotmatrixLCDbyindoorartifacts

Advantage:

thecostofrawmaterials,productionandprocessingofthemostadvantageofsimpleprocess,qualityisstable.

Faults:

colorconsistency,Mosaicphenomenon,seriouseffect.

2.Singlelampschemesforsolvingthebitmapscreencolor:

foroutdoorscreentechnology,aschemeofpixels,outdoormultiplexingtechnique（alsocalledpixelsharingtechnology,virtualpixelstoindoordisplaytechnology）transplantation.

Advantage:

colorconsistencythanbitmapmoduleofgoodway.

Weakness:

theeffectnotbeautiful,colormixing,horizontalAngleandhaveoffcolor.Processisrelativelyplex,anti-statichigh.Actualpixelresolutiondo10,000moredifficult.

Features

•patiblewithMCS-51®Products

•8KBytesofIn-SystemProgrammable（ISP）FlashMemory

•1000Write/EraseCycles

•FullyStaticOperation:

0Hzto33MHz

•Three-levelProgramMemoryLock

•256x8-bitInternalRAM

•32ProgrammableI/OLines

•Three16-bitTimer/Counters

•EightInterruptSources

•FullDuplexUARTSerialChannel

•Low-powerIdleandPower-downModes

•InterruptRecoveryfromPower-downMode

•WatchdogTimer

•DualDataPointer

•Power-offFlag

Description

TheAT89C52isalow-power,high-performanceCMOS8-bitmicrocontrollerwith8Kbytesofin-systemprogrammableFlashmemory.ThedeviceismanufacturedusingAtmel’shigh-densitynonvolatilememorytechnologyandispatiblewiththeindustrystandard80C51instructionsetandpinout.Theon-chipFlashallowstheprogrammemoryt