2. Kev xaiv cov neeg muab khoom ua si
Raws li txoj cai ntawm kev zeem muag, thaum lub teeb pom kev ntawm qhov nruab nrab ntawm qhov nruab nrab ntawm optical density mus rau qhov nruab nrab ntawm qhov muag optical, tag nrho cov emission tshwm sim thaum qhov teeb meem kaum tuaj txog ib qho nqi, uas yog, ntau dua los yog sib npaug rau lub qhov tseem ceeb. Kev ntsuas ntawm cov khoom GaL yog 2.3, thiab qhov tseem ceeb heev θ0 = kev txhaum-1 (n2 / n1) yog thaum lub teeb tawm ntawm cov dej ua siv rau hauv cov huab cua.
Qhov twg n2 yog sib npaug li 1, piv txwv li, qhov ntsuas ntawm huab cua, thiab n1 yog qhov tsis ua kom pom ntawm GaN, uas yog qhov tseem ceeb heev? 0 yog xam los ua txog 25.8 degrees. Nyob rau hauv cov ntaub ntawv no, lub teeb tawm ntawm lub teeb tshwm sim ntawm qhov teeb meem yog qhov tsawg tshaj 25.8 degrees ntawm qhov chaw ntawm lub teeb ntawm lub teeb, nws yog qhia hais tias tam sim no zoo quantum efficiency ntawm GaN chips nyob rau hauv 30% -40%, yog li ntawd, vim mus rau sab hauv lub ntxais ntawm chip muaju, Yuav tsum tau txhaj rau hauv lub siv lead ua sab nraud qhov faib feem ntawm lub teeb me heev. Nws yog qhia hais tias tam sim no GaN chip lwm quantum efficiency ntawm 30% -40%. Ib yam li ntawd, lub teeb tawm ntawm lub nti los ntawm cov khoom ntim, xa mus rau qhov chaw, tab sis tseem xav txog kev cuam tshuam ntawm cov khoom siv rau kev ua tau zoo ntawm lub teeb rho tawm.
Yog li, thiaj li yuav ua kom cov hauj lwm zoo ntawm cov khoom coj los ua kom pom tseeb, koj yuav tsum txhim kho tus nqi ntawm n2, uas yog, txhawm rau txhim kho qhov ntsuas ntawm cov khoom ntim khoom los txhim kho qhov tseem ceeb ntawm qhov khoom, qhov no ua kom qhov khoom ntim luminous kev ua haujlwm. Nyob rau tib lub sijhawm, cov khoom ntim rau lub teeb haum me me. Yuav kom nce qhov kev faib ua feem ntawm lub teeb pom kev zoo, cov txheej txheem ntawm pob yog qhov zoo tshaj plaws arched los yog hemispherical, yog li ntawd lub teeb los ntawm pob khoom rau saum huab cua, yuav luag txhua yam rau lub interface, thiab yog li tsis tsim tag nrho cov kev xav.
3. Kev kho tus cwj pwm
Muaj ob qho tseem ceeb ntawm cov txheej txheem ntawm kev xav, ib qho yog qhov kev xav ntawm kev ua haujlwm ntawm nti, qhov thib ob yog qhov kev xav ntawm cov khoom siv nyob rau hauv lub teeb, los ntawm kev sab hauv thiab sab nrauv thiaj ua, los txhim kho qhov kev faib ua feem ntawm lub teeb tawm los ntawm cov nti hauv cov nti kom txo qhov kev nqus, Txhim kho qhov kev ua haujlwm ntawm cov khoom siv hluav taws xob LED. Los ntawm lub pob, lub hwjchim LED yog feem ntau lub zog nti tuaj yeem nrog cov kabmob ntawm lub tsho hlau lossis cov substrate, hom bracket cov kab noj yog feem ntau los kho cov teebmeem ntawm cov tshuab plating, siv rau txoj kev cai lij choj, cov xwm txheej kuj yuav tsum yog electroplating, tab sis cov saum toj no ob hom kev ua los ntawm cov pwm neeg thiab txheej txheem teebmeem, tom qab kev kho mob ntawm cov kab noj yog qhov muaj qee yam kev xav, tab sis tsis zoo tagnrho. Tam sim no, cov khoom siv ntawm cov substrate raws li cov kab noj hniav, vim tsis muaj qhov tseeb ntawm cov hlau los yog hlau txheej oxidation, cov nyhuv reflection yog cov neeg pluag, uas coj mus rau ntau lub teeb nyob rau hauv cheeb tsam tom qab thaum muab absorbed, tsis muaj kev cuam tshuam lub hom phiaj mus rau saum npoo, uas ua rau kawg Thaum lub pob los siv lub teeb ua haujlwm tsis muaj zog.
Peb tau kawm thiab tau soj ntsuam ntau yam khoom siv ntiag tug uas siv cov khoom siv los ntawm cov txheej txheem cov txheej txheem, los ntawm cov txheej txheem no, thiaj li pom tau tias tus kab mob lub teeb ntawm lub teeb tsis haum yog qhov tsawg heev, tuaj yeem feem ntau ntawm lub teeb saum toj no yog reflected mus rau tus du saum npoo. Kev ua haujlwm ntawm cov khoom kho tom qab qhov kev kho no tuaj yeem raug nce ntxiv dua 30% mus rau 50% piv rau qhov ntawd ua ntej kev kho mob. Peb tam sim no 1W dawb zog LED luminous efficiency txog li 40-50lm / W (nyob rau hauv qhov kev sib tw PMS-50 spectral tsom xeem ntsuas ntsuas tau), tau ib pob nyhuv zoo.
4. Kev xaiv phosphor thiab txheej
Rau cov fais fab teeb dawb, qhov kev txhim kho ntawm cov txiaj ntsig zoo muaj feem xyuam rau qhov kev xaiv ntawm phosphor thiab process. Txhawm rau txhim kho cov phosphor ntawm kev ua kom muaj xim xiav, qhov kev xaiv thawj zaug ntawm phosphor kom tsim nyog, nrog rau kev tshoov siab wavelength, kev loj me me, kev ua kom tau zoo, thiab lwm yam., Xav tau kev txheeb xyuas kev soj ntsuam, suav nyiaj rau ntau yam kev ua tau zoo. Secondly, qhov txheej txheem ntawm lub phosphor yuav tsum ua tau zoo, thiab nws yog qhov zoo tshaj tias lub thickness ntawm lub nplaum txheej ntawm txhua lub teeb-emitting nto yog uniform, thiaj li hais tias lub teeb lub teeb tsis tau emitted ntawm uneven thickness, thiab qhov zoo ntawm cov qhov chaw yuav kho.
Thib ob, qhov xaus
Zoo thermal tsim los txhim kho lub hwj chim LED cov khoom luminous efficiency muaj lub luag hauj lwm tseem ceeb, tab sis tseem yuav tau xyuas khoom lub neej thiab kev cia siab ntawm lub tsev. Thiab cov qauv siv ntawm lub teeb pom kev zoo, qhov twg qhov tsom xam hais txog cov kab noj ua ke, muaj cov yas thiab lwm cov qauv tsim, cov khoom xaiv thiab cov txheej txheem, tuaj yeem txhim kho lub hwjchim ntawm lub teeb ci teeb pom kev zoo. Rau cov fais fab-hom dawb LED, kev xaiv ntawm phosphor thiab cov txheej txheem tsim, kev txhim kho ntawm lub teeb thiab cov luminous efficiency yog qhov tseem ceeb.
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