led培训（led培训）.docx

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1、Ied培训（led培训）led培训(Ied培训)1.EDproducttrainingmaterials,defaultclassification,2009-08-08,09:32:22,reading207,review0:big,mediumandsmall1.EDdisplayFoundationOne,whatis1.ED?1,1.-E-DisEnglishlight,emitting,diode(light-emittingdiode)abbreviation,anditsbasicstructureasshowninthefollowingpicturePNjunction1.E

2、Dledsymbol2,light-emittingprinciple:whentherecombinationofelectronsandholeswhenPNjunction,electronsfromhighleveltransitiontoalowerlevel,theelectronexcessenergytoemitphotons(electromagneticwaves)releasedintheformofproduceelectroluminescencephenomenon.Thecoloroflightisrelatedtothematerialelementsthatm

3、akeupitsbase.3,1.EDadvantages:withsmallsize,highefficiency,fastresponse,colorstability,long1ife,energyconsumptionissmall,easytocontrol.4,1.EDquality:1.EDqualitydependsonthequalityofthechipmaterialsandpackagingtechnology.1.EDchip5,common:JapanNichia(B),CREE(G),HP(R),China(DalianroadAXT,Taiwan(USA),Ch

4、inaischipGuolianopto/(R),Jia,Jingyuan)etc.6,1.ED:accordingtothe1ightcolorcanbedividedintored,orange,white,purpleandgreen(yellow,greenandpuregreen,blue);accordingtothecharacteristicsofsmoothround,rectangular,squarelamp,lamptube,thelateralsurfacelight-emittingtube;dividedbythestructureofallmetal,epoxy

5、encapsulationthebaseofepoxyencapsulation,ceramicbaseandglassepoxyencapsulatedpackage;accordingtotheluminousi11tensitywithordinarybrightness(intensitylessthan10mcd),highbrightness(intensitygreaterthan100mcd)andhighbrightness(intensityin10-100MCD)7,1.EDdisplaychipscommonlyused1ight-emittingcolorandthe

6、correspondingwavelengthrange:red(RED):R(610nm-640nm),green(GREEN):G(positivewavelength520-525),blue(B1.UE):B(positivewavelength465-470).8,1.-E-Dsinglelampworkingvoltage:redlight(R):1.8-2.2V;greenlight(G):3.2-3.5V;bluelight(B):3.0-3.3VTwo,1.EDdisplayoverview:1,1.EDdisplayisaflatpanelmatrixdisplayusin

7、glight-emittingdiode(1.ED)asalight-emittingdevice.1.EDhasthecharacteristicsofhighphotoelectricconversionefficiency,1owdrivingvoltage,easyinterfacingwithcomputerandlongservicelife.Thesizeofthescreencanbeseamlesslysplicedaccordingtotheneed.Mappingbetweenscreen1.EDscreenandcontrolcomputerdisplaywithpoi

8、ntpointcorrespondingtothescreenwithgraycontrol,anddisplayandcomputerdisplay,soyoucanplaytheanimation,VCD,matchedwithaspecialmultimediacard,canplayvidcosignal,hastherichexpressiveforce.Thescreencannotworkawayfromthecomputer.Ingeneral,acomputercontrolsavideoscreen.Onsomeoccasionswithspecialrequirement

9、s,customersrequestthedisplayscreentodisplayTVprograms,DVDvideo,DVvideoinformationandsoon.Some1.EDcontrolsystemmanufacturershavedevelopedvideomessagesthatcanbedetachedfromPC,showTVprograms,DVDvideo,andDVvideo,suchasthosedevelopedbyKING1.EDMaincontroller:MWI313DCXG,receiverbox:MW1314C-V,scanboard:MW13

10、22-V1.EDscreenbody:the1.EDmoduleortheclustertubeisassembledandarrangedinaccordancewiththeactualneeds,arrangedintoamatrix,andprovidedwithaspecialdisplaycircuit,aDCregulatedpowersupply,asoftware,aframeandanouterdecoration,etc.toforma1.EDdisplayscreen.1,screenbodyresolution:1.EDdisplaylateralpixelpoint

11、smultipliedbytheverticalpixelcount,thatis,screenbodyresolution.Theresolutionofthescreenreferstothenumbeiofpixelsthatthescreenhas.Atpresent,themainproportionis4:3and16:9,andthemainworkingmodesofthecomputerare640X480,800X600,1024X768andthree.Thehighertheresolutionofthescreen,themorecontentyoucandispla

12、y,themoredelicatethepicture,butthehighertheresolution,themoreexpensivethecost.2,gray:referstothebrightnessofthepixelchangesinbrightness.Thebrightness1eve1ofeachprimarycoloriscalledgraylevel,andthehigherthegraylevelis,themorerealistictheco1orreproductionis.Therealizationofgraylevelisachievedbycontrol

13、lingthedutycycleofthecurrentinthe1.EDtube.3,brightness(1.uminance):inagivendirection,1.uminousintensityperunitarea.Theunitofbrightnessiscdm2.Thebrightnessisdirectlyproportionaltothenumberof1.EDperunitareaandthebrightnessofthe1.EDitself.Thebrightnessofa1.EDisproportionaltoitsdrivingcurrent,butitslife

14、isinverselyproportionaltothesquareofitscurrent,soitisnotpossibletoincreasethedrivecurrentexcessivelyinordertopursuebrightness.4definitionandcontrast:contrast=brightnesswhen(brightness)/brightnessduringlightemission(reflectionbrightness),inordertobeabletodisplayatextandimagebrightnessuniformity,notaf

15、fectedbyambientlight,thescreenshou1dhaveenoughcontrast.5,theuniformityofthescreen:thescreeniscomposedofmanypixels,sothebrightnesscontrolpixeldifferenceisaveryimportanttopic,pooruniformityofthescreentomeasurethepixelbrightnessuniformityisdefinedasfollows:brightnessuniformity=whitebalancewhenthedarkpi

16、xelbrightness/whitebalancethebrightestpixel.Intheadjustmentofwhitebalancein1.EDdisplay,red,greenandbluebrightnessratio:simpleRGBluminanceratio:3:6:1：preciseRGBluminanceratio:3.0:5.9:1.1.6,1.EDdisplaysystem:thedisplaycontrolsystem(includingthemaincontrolandscanning,orsendingandreceivingcard：alsoknownasreceivingcard,dataacquisitioncardandsoon)thecomputerandcomputerequipment(suchasPCTVmultimediavideocard,intelligentswitchequipment)thesystemsoftwaredevelopment(twosoftware)7,gene