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1、本科毕业设计(论文)外文翻译（附外文原文）学院：信息科学与工程学院课题名称：基于单片机的定时显示设计专业(方向)：通信工程班级：通信09-1学生：何探指导教师：牛秦洲日期：2013.4.23窗体顶端1.1LEDdisplaybackgroundofthedevelopmentandresearchstatusMoreandmoreplacesinshoppingmalls,railwaystations,docks,subwaystationsandavarietyofworkwindowLEDdotmatrixdisplaygraphicsandcharacters.LEDindu
2、stryhasbecomeafast-growingemergingindustry,ahugemarketspaceandbroadprospects.Withtherapiddevelopmentoftheinformationindustry,LEDdisplayhasbeenwidelyusedasanimportantmeansofdisseminationofinformation,contentandservicesaimtopromotetheneedforindoorandoutdoorpublicplaces,suchasindoorandoutdooradver
3、tisinginpublicplaces,theairportstationvisitorsguidebusstopvehicles,securitiesandbankinginformationdisplay,restaurantsofferinformationbeansshown,highwayvariableinformationboards,stadiumsthegames,buildinglighting,trafficlights,landscapelighting.Clearly,LEDdisplayhasbecomeanimportantsymbolofthecit
4、ylighting,moderninformationsociety.LEDdotmatrixdesignismainlyusedindisplay,itisalightemittingdiodedotmatrixmoduleorunitofpixelscomposedofaflatdisplayscreen.Becauseithastheadvantagesofhighluminousefficiency,longlife,andflexibleconfiguration,richcolors,andtheindoorandoutdoorenvironmentaladaptabil
5、ity.The1970s,thefirstGaP,GaAsPhomogeneousknotred,yellow,greenandlowluminousefficiencyLEDbegantobeusedindicator,numbers,andtext.FromtheLEDstartstoenteravarietyofapplications,includingaerospace,aircraft,automotive,industrialapplications,communications,consumerproducts,etc.,throughoutthevariousdep
6、artmentsofthenationaleconomy,andthousandsoffamilies.1996LEDsaleshavereachedbillionsofdollarsaroundtheworld.OvertheyearstheLEDhasbeensubjecttothelimitationsofcolorandluminousefficiency,butbecauseoftheGaPandGaAsPLEDwithlonglife,highreliability,operatingcurrent,andthushasmanyadvantageswithTTL,CMOS
7、digitalcircuitscompatiblegreenbyuserMi.Inrecentyears,highbrightness,fullcolorLEDmaterialanddevicetechnologyresearchtopicsattheforefront.Theultra-highbrightness(UHB)istheluminousintensityatorabove100mcdLED,alsoknownasthecandela(cd)
