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1、led色彩（ice色彩）ThispaperiscontributedbypaceypengDOCdocumentsmayexperiencepoorbrowsingontheWAPside.ItisrecommendedthatyouselectTXTfirstordownloadthesourcefiletothelocalmachine.LEDistakenfromLightEmittingDiodethreeChineseacronym,translatedas"led",asthenamesuggestsisalightemittingdiodecanc
2、onvertelectricalenergytolightthecharacteristicsofelectronicdeviceswithdiode.Atpresent,differentlightemittingdiodescanemitdifferentwavelengthsfrominfraredtoblue,andnowthepurpleorevenultravioletlight-emittingdiodeshavebeenborn.InadditiontothebluelightontheLEDcoatedwithphosphor,thebluel
3、ightintowhitelightwhiteLED.Colorandprocess:thecolorandprocessofLED:thematerialsthatmakeLEDaredifferent,whichcanproducephotonswithdifferentenergy,whichcancontrolthewavelengthoflightemittedbyLED,thatis,spectrumorcolor.ThefirstLEDusedinhistoryisarsenic(As)gallium(Ga),anditspositivePNjun
4、ctionvoltagedrop(VF,canbeunderstoodaslightorworkingvoltage)is1.424V,andtheemittedlightistheinfraredspectrum.AnothercommonLEDmaterialisphosphor(P)gallium(Ga),whosepositivePNjunctionvoltageis2.261V,andtheemittedlightisgreen.ThetwokindsofmaterialsbasedonLEDbyGaAs1-xPx,theearlyindustrial
5、materialsstructuretheorycanbeproducedfrominfraredtoanygreenwavelengthrangeofLED,thepercentageofphosphorussubstitutedsubscriptXrepresentsarsenic.Generally,thewavelengthcolorofLEDcanbedeterminedbythePNjunctionpressuredrop.TypicalofthemareGaAs0.6P0.4redLED,orangelightLEDofGaAs0.35P0.65,
6、yellowlightLEDofGaAs0.14P0.86andsoon.Becausethemanufactureusesthegallium,arsenic,phosphorusthreekindsofelements,socommonlyknownastheseLEDforthreeelementluminoustube.AndGaN(GAN)blueLED,GaPgreenLEDandGaAsinfraredLED,knownasthetwoelementlight-emittingtube.Atpresent,thenewesttechnologyis
7、mixedwithaluminum(Al),calcium(Ca),indium(In)andnitrogen(N)fourelementsofmanufacturingfourelementmaterialLEDfourelementsofAlGaInN,cancoverallthevisiblelightandpartofultravioletspectralrange.Lightintensity:theemissionintensity:intensitymeasuringunitaunitofilluminance(LuxLux),theunitofl
8、uminousflux(
