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THECONTROLSYSTEMFORLIGHTINGBASEDONSINGLE–CHIPMICROCOMPUTERWITHTHERAPIDDEVELOPMENTOFELECTRONICTECHNOLOGY,THESYSTEMOFCONTROLBASEDONSINGLECHIPMICROCOMPUTERISWIDELYAPPLIEDININDUSTRY,AGRICULTURE,ELECTRICPOWER,ELECTRON,INTELLIGENTBUILDINGANDSOONMICROCOMPUTER,ASTHESUBJECTANDCOREOFTHEEMBEDDEDSYSTEMOFCONTROL,REPLACESTHETRADITIONALSYSTEMELECTRONICCIRCUITATTHESAMETIME,THEDEVELOPMENTANDMATURATIONOFTHEINTELLIGENTBUILDINGHAVEESTABLISHEDTHESUBSTANTIALFOUNDATIONFORTHEPOPULARIZATIONANDAPPLICATIONOFTHECONTROLSYSTEMFORLIGHTINGBASEDONSINGLECHIPMICROCOMPUTERTHEPAPEREXPATIATESONTHEDESIGNINGTHEORIESANDIMPLEMENTATIONMETHODOFTHECONTROLSYSTEMFORLIGHTINGBYWIREDORWIRELESSCOMMUNICATIONSTAKINGTHEDESIGNINGPROCESSASMAINLINE,ITDESCRIBESTHEPROCESSOFDESIGNINGFROMTWORESPECTSHARDWAREANDSOFTWAREINANOTHERWORD,THEPAPERDESCRIBESTHEPROCESSFROMTHEMETHODOFCIRCUITDESIGNINGTOTHESOFTWARETECHNOLOGYOFREALIZINGTHEDEMANDEDFUNCTIONSTHEHOSTCONTROLLEROFTHECONTROLSYSTEMFORLIGHTINGISBASEDONAT89C51SINGLECHIPMICROCOMPUTER,ANDTHEAUXILIARYONESAREBASEDONAT89C2051THESYSTEMCANDOMANYJOBS,SUCHASWIREDCOMMUNICATION,WIRELESSDATATRANSMITTING,CONTROLLINGANDDISPLAYTHEPAPERDESCRIBESTHEDESIGNINGPROCESSOFTHECIRCUITATLENGTH,INCLUDINGKEYBOARDANDLEDDISPLAYCIRCUIT,RS485COMMUNICATIONCIRCUIT,WIRELESSTRANSMITTINGCIRCUIT,CONTROLCIRCUITOFLIGHTING,WATCHDOGCIRCUIT,ETCTHEDESIGNINGOFSOFTWAREMAINLYINCLUDESTHESEVERALPROGRAMMING,SUCHASWIREDCOMMUNICATION,WIRELESSDATATRANSMITTING,LAMPLIGHTCONTROLLING,TIMEDCONTROLLING,KEYBOARDSCANNINGANDLEDDISPLAYINGTHEWIREDCOMMUNICATIONPROGRAMMINGFUNCTIONISTHATTHROUGHMASTERSLAVECOMMUNICATIONMETHODBASEDONRS485THEHOSTCONTROLLERSENDSORDERSTOTHEALLAUXILIARYCONTROLLERSOREACHONE,INCLUDINGTURNINGONLIGHTING,TURNINGOFFLIGHTING,REGULATINGBRIGHTNESSOFLIGHTING,CONTROLLINGTIMEDLIGHTING,ETCTHEWIRELESSDATATRANSMITTINGPROGRAMMINGFUNCTIONISTHATBYWIRELESSTRANSMITTERITREALIZESWIRELESSCONTROLLINGOFTHELIGHTING,ANDACHIEVESTHEFUNCTIONSIDENTICALTOWIREDCOMMUNICATIONTRADITIONALBUILDINGAUTOMATICCONTROLLINGSYSTEMONLYINCLUDESSUCHSUBSYSTEMSCOMPREHENSIVEWIRES,COMPUTERNETWORK,SAFEDEFENDING,FIREDEFENDINGANDCLOSEDCIRCUITSTVMONITORINGSYSTEMSANDSOONBUTINTHERECENTYEARS,WITHTHEECONOMICDEVELOPMENTANDTHEPROGRESSOFTHESCIENCEANDTECHNOLOGY,PEOPLEHAVEPUTFORWARDMOREHIGHERDEMANDSFORENERGYCONSERVATIONOFLIGHTINGLAMPSANDSCIENTIFICMANAGEMENT,WHICHMAKESTHELIGHTINGCONTROLSYSTEMOFTHECLASSROOMHAVESUCHFUNCTIONSASENERGYCONSERVATION,CONVENIENCE,INTELLIGENCE,ETCWHAT’SMORE,ITCANIMPROVETHEEFFICIENCYOFTHEWORKANDSTUDY,RESULTINMANYKINDSOFLIGHTINGEFFECTS,ANDIMPROVETHEMANAGEMENTLEVELTHEREARETHEDESIGNPHILOSOPHYOFTHISSYSTEM,OPERATIONPRINCIPLEOFEVERYCHIP,ANDSUCHRELEVANTPROBLEMSASTHECHOICE,MAKINGANDDEBUGGINGOFTHECOMPONENTSANDUNITCIRCUITSABOUTLIGHTINGCONTROLSYSTEMOFCLASSROOM,WHICHREGARDSTHEMICROCONTROLUNITASTHECONTROLCOREOFTHESYSTEMTHISCONTROLSYSTEMISSUITABLEFORSUCHOCCASIONSASVARIOUSKINDSOFMULTIMEDIACLASSROOMS,STATIONWAITINGROOMS,OFFICES,ETCITISMAINLYCOMPOSEDOFLIGHTENINGCONTROLUNIT,MOVINGSENSORUNIT,ILLUMINATIVESENSORUNIT,HANDEDCONTROLUNIT,ANDSOONTHETARGETOFTHEDESIGNISINTELLIGENTLIGHTENING,SCIENTIFICMANAGEMENT,ANDENERGYCONSERVATIONANDCOSTCONSERVATIONTHEAT89C2051WITHTHEFEATUREOFCHEAPCOSTHASBEENUSEDASTHECONTROLUNITINTHEWHOLEDESIGNTHEWHOLESYSTEMNOTONLYHASBEENINTRODUCEDINTHEPAPER,BUTALSOHASBEENSUCCESSFULLYFINISHEDWITHSERIESOFTHEDAISMICROCONTROLUNITTHEEXPERIMENTSUGGESTSTHATTHISDESIGNCANEASILYCOMETRUEIFTHEUSERSDOASTHETHESISSOITCANBEUSEDASTHEINTELLIGENTLIGHTINGCONTROLSYSTEMOFTHEUNIVERSITYCAMPUSWHAT’SMORE,ITWILLAFFECTBETTERIFCOMBININGWITHOTHERINTELLIGENTCONTROLSYSTEMSLEDSUMMARYLEDLIGHTEMITTINGDIODE,LIGHTEMITTINGDIODE,ISASOLIDSTATESEMICONDUCTORDEVICES,WHICHCANBEDIRECTLYCONVERTEDINTOELECTRICITYTOLIGHTLEDISTHEHEARTOFASEMICONDUCTORCHIP,THECHIPISATTACHEDTOONEENDOFASTENT,ISTHENEGATIVESIDE,THEOTHERENDOFTHEPOWEROFTHECATHODE,THEENTIRECHIPPACKAGETOBEEPOXYRESINSEMICONDUCTORCHIPISCOMPOSEDOFTWOPARTS,PARTOFTHEPTYPESEMICONDUCTOR,ITINSIDETHEHOLEDOMINATED,THEOTHERSIDEISTHENTYPESEMICONDUCTOR,HEREISMAINLYELECTRONICBUTLINKINGTHETWOSEMICONDUCTORS,AMONGTHEMTHEFORMATIONOFAPNJUNCTIONWHENTHECURRENTTHROUGHTHEWIRESROLEINTHISCHIP,WILLBEPUSHINGEP,PZONEINTHEHOLEWITHELECTRONICCOMPOSITE,ANDTHENTOBEISSUEDINTHEFORMOFPHOTONENERGY,ANDTHISISTHEPRINCIPLEOFLEDLUMINESCENCETHEWAVELENGTHOFLIGHTTHATISTHECOLOROFLIGHT,ISFORMEDBYTHEPNJUNCTIONOFTHEDECISIONSOFTHEMATERIALLEDHISTORY50YEARSAGO,PEOPLEHAVETOUNDERSTANDSEMICONDUCTORMATERIALSCANPRODUCELIGHTOFTHEBASICKNOWLEDGE,THEFIRSTCOMMERCIALDIODESIN1960ENGLISHISTHELEDLIGHTEMITTINGDIODELEDACRONYM,ANDITSBASICSTRUCTUREISANELECTROLUMINESCENTSEMICONDUCTORMATERIALS,PLACEDINAWIRERACK,THENSEALEDWITHEPOXYRESINAROUND,THATIS,SOLIDPACKAGE,THEREFORE,THEPROTECTIONOFTHEINTERNALBATTERIESCANPLAYTHEROLEOFLINE,SOTHESEISMICPERFORMANCELEDGOODLEDISTHECOREOFTHEPTYPESEMICONDUCTORANDCOMPONENTSOFTHENTYPESEMICONDUCTORCHIPS,THEPTYPESEMICONDUCTORANDNTYPESEMICONDUCTORBETWEENATRANSITIONLAYER,CALLEDTHEPNJUNCTIONINSOMESEMICONDUCTORMATERIALSINTHEPNJUNCTION,THEINJECTIONOFASMALLNUMBEROFCARRIERCARRIERANDTHEMAJORITYOFTHEEXTRATIMEWILLBEINTHEFORMOFLIGHTENERGYTORELEASE,THUSTHEPOWERTODIRECTCONVERSIONOFSOLARENERGYPNJUNCTIONONREVERSEVOLTAGE,AFEWHARDCARRIERINJECTION,ITISNOTLUMINOUSTHISUSEOFINJECTIONELECTROLUMINESCENTDIODESISPRODUCEDBYTHEPRINCIPLEOFLIGHTEMITTINGDIODES,COMMONLYKNOWNASLEDWHENITINAPOSITIVESTATEOFTHEWORKTHATIS,ATBOTHENDSWITHFORWARDVOLTAGE,THECURRENTFLOWSFROMTHELEDANODE,CATHODE,SEMICONDUCTORCRYSTALSONTHEISSUEFROMTHEULTRAVIOLETTOINFRAREDLIGHTOFDIFFERENTCOLORS,LIGHTANDTHESTRENGTHOFTHECURRENTSINSTRUMENTSUSEDFORTHEFIRSTLEDLIGHTSOURCEINSTRUCTIONS,BUTALLKINDSOFLIGHTCOLOREDLEDLIGHTSINTRAFFICANDLARGESCREENHASBEENWIDELYAPPLIED,HAVEAVERYGOODECONOMICANDSOCIALBENEFITSTHE12INCHREDTRAFFICLIGHTSASANEXAMPLE,ISUSEDINTHEUNITEDSTATESHAVELONGLIFE,LOWEFFICIENCY140WATTINCANDESCENTLAMPASALIGHTSOURCE,ITPRODUCED2,000LUMENSOFWHITELIGHTTHEREDFILTER,THELOSS90PERCENT,ONLY200LUMENSOFREDLIGHTINTHELIGHTOFTHENEWDESIGN,LUMILEDSCOMPANIESHAVE18REDLEDLIGHTSOURCE,INCLUDINGTHELOSSOFCIRCUIT,ATOTALPOWERCONSUMPTIONOF14WATTSTOGENERATETHESAMEOPTICALEFFECTAUTOMOTIVELEDLIGHTSISALSOTHESOURCEOFIMPORTANTAREASFORGENERALLIGHTING,PEOPLENEEDMOREWHITELIGHTSOURCESTHE1998WHITELEDSUCCESSFULDEVELOPMENTTHISISTHEGANLEDCHIPANDYTTRIUMALUMINUMGARNETYAGPACKAGETOGETHERCAUSEGANCHIPOFTHEBLURAYΛP465NM,WD30NM,MADEOFHIGHTEMPERATURESINTERINGOFTHECE3YAGPHOSPHORSEXCITEDBYTHISBLURAYAFTERIRRADIATINGAYELLOW,THEPEAK550NMBLUECHIPINSTALLEDINTHELEDBASEDWANXINGREFLECTIONINTHECAVITY,COVEREDWITHARESINMIXEDWITHYAGTHINLAYER,ABOUT200500NMLEDBASEDTABLETSISSUEDBYTHEBLURAYABSORPTIONPARTOFTHEPHOSPHOR,THEPHOSPHORANOTHERPARTOFTHEBLURAYANDAYELLOWLIGHTMIXED,CANBEAWHITENOW,THEINGAN/YAGWHITELED,YAGPHOSPHORBYCHANGINGTHECHEMICALCOMPOSITIONOFTHEPHOSPHORLAYERANDADJUSTTHETHICKNESSOFTHE350010000KCOLORTEMPERATURECANBECOLOREDWHITETHISBLUELEDTHROUGHTHEMETHODBYWHITE,CONSTRUCTEDSIMPLE,LOWCOST,HIGHTECHNOLOGYISMATURE,SOUSETHEMOSTINTHE1960S,THEUSEOFSCIENCEANDTECHNOLOGYWORKERSSEMICONDUCTORPNJUNCTIONOFTHEPRINCIPLEOFDEVELOPINGALEDLIGHTEMITTINGDIODESATTHATTIME,THEDEVELOPMENTOFLED,THEMATERIALSUSEDAREGAASP,ITSLUMINOUSCOLORISREDAFTERNEARLY30YEARSOFDEVELOPMENT,ANDNOWWEAREVERYFAMILIARWITHTHELED,HASBEENSENTTORED,ORANGE,YELLOW,GREEN,BLUE,ANDOTHERSHADEHOWEVERLIGHTINGNECESSARYFORWHITELEDLIGHTONLYINRECENTYEARSTODEVELOP,READERSHERETOTELLUSABOUTLIGHTINGWITHWHITELED
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