Cov ntsiab lus uas cuam tshuam txog kev ua haujlwm ntawm cov teeb pom kev zoo ntawm LED - LED lens strips

Qhov dav hluav taws xob pob siv hom bracket, epoxy pob ntawv pob, lub hwj chim yog me, tag nrho luminous flux tsis loj, ci ntsa iab tuaj yeem siv raws li qee qhov tshwj xeeb teeb pom kev zoo. Nrog rau kev tsim ntawm LED nti technology thiab ntim tshuab, teb rau qhov kev thov rau high-light flux LED khoom nyob rau hauv lub teeb pom kev zoo, lub zog raws li LEDs tau maj nkag hauv lub khw. Qhov sib txawv ntawm hom fais fab no feem ntau txo nws hwj lub teeb emitting nti ntawm lub dab dej kub thiab lub cua sov, thiab lub lens optical assembled rau nws kom ua tau ib qho kev kho qhov muag qis tshaj tawm. Sab hauv ntawm lub lens yog sau nrog tsawg-stress flexible silicone.

Fais fab LED nkag mus rau lub teeb pom kev zoo, ua kom tiav tsev neeg lub teeb pom kev zoo, muaj ntau qhov teeb meem yuav tsum tau daws, qhov tseem ceeb tshaj plaws uas yog kev ua haujlwm zoo. Tam sim no, qhov lumen efficiency tshaj qhia los ntawm lub hwj chim LEDs nyob hauv kev ua lag luam yog kwv yees li ntawm 50lm / W, uas yog deb ntawm cov tseev kom muaj nyob hauv tsev txhua hnub teeb. Thiaj li yuav ua kom lub zog zoo ntawm lub hwjchim ci ntsa iab, ntawm qhov kev sib tw, kev ua haujlwm ntawm lub teeb-emitting chip xav tau zoo tuaj; ntawm qhov tod tes, lub tshuab ntim ntawm lub hwj huam yam LED xav tau ntxiv zoo dua, pib los ntawm ntau yam xws li cov qauv tsim, khoom siv tshuab, thiab cov txheej txheem technology los txhim kho cov khoom siv Encapsulation teeb ci.

Dab tsi yog lub ntim cov khoom uas cuam tshuam rau kev ua kom lub teeb pom kev zoo?

Kub dissipation tshuab

Rau lub teeb emitting diodes uas yog PN junctions, thaum lub sijhawm tam sim no ntws los ntawm PN, lub PN hlawv muaj cua sov, thiab qhov cua sov no tau tawm mus rau saum huab cua ntawm cov nplaum, cov ntaub ntawv pov tseg, cov cua sov, thiab lwm yam. . Qee cov ntaub ntawv muaj thermal impedance uas blocks tshav kub, uas yog, thermal tsis kam. Lub thermal tsis kam yog tus nqi txiav txim siab los ntawm tus loj, tus qauv, thiab cov khoom ntawm lub tshuab. Cia lub thermal ua hauj lwm ntawm lub teeb emitting diode yog Rth (° C / W) thiab qhov hluav taws xob dissipation hwj chim yog PD (W). Nyob rau lub sij hawm no, qhov ntsuas kub nce siab ntawm PN hlav vim yog tam sim no tshav kub yog:

T (° C) = Rth × PD.

PN qhov kub thiab txias yog:

TJ = TA + Rth × PD

Qhov twg TA yog qhov kub thiab txias. Thaum lub tshav kub nce siab, qhov tshwm sim ntawm PN nkag mus rau light-emitting recombination decreases, thiab qhov ci ntawm lub teeb-emitting diode decreases. Nyob rau tib lub sijhawm, vim qhov nce hauv kub li cas los ntawm cov cua kub poob, qhov ci ntsa iab ntawm LED yuav tsis txuas ntxiv nrog rau qhov tam sim no, piv txwv li, nws yuav qhia thermal saturation. Tsis tas li ntawd, raws li qhov kev sib tshuam sov nce, lub ncov ntawm lub teeb siab tseem yuav hloov mus rau qhov ntev ntawm kev taw qhia, hais txog 0.2-0.3nm / ° C, uas yog xiav cov kab xiav dawb ntawm LED dawb tau los ntawm cov YAG phosphor coated nrog lub xiav nti. Kev tsav tsheb yuav ua rau muaj kev tsis txaus siab nrog kev xyuam xim ntawm lub phosphor, uas ua rau txo qhov kev ua haujlwm zoo ntawm cov dawb LED thiab ua rau muaj kev hloov xim ntawm lub teeb dawb.

Rau lub hwj chim LED, kev tsav tsheb tam sim no feem ntau yog ntau pua tus nqi los yog ntau dua, thiab qhov sib nrawm ntawm PN hlav tam sim no loj heev, yog li qhov kub siab ntawm PN hlav dhau heev lawm. Rau ntim thiab daim ntaub ntawv, yuav ua li cas kom tsis txhob thermal resistance ntawm cov khoom, kom lub cua sov generated los ntawm PN hlauv taws xob tuaj yeem tawm sai li sai tau, tsis tsuas yog tuaj yeem txhim kho cov khoom muag tam sim no, txhim kho cov kev ua haujlwm zoo, tiam sis kuj txhim kho txoj kev ntseeg thiab lub neej ntawm qhov khoom. Yuav kom txo cov thermal ua haujlwm ntawm cov khoom, ua ntej ntawm txhua yam, xaiv cov khoom ntim yog qhov tseem ceeb, xws li cov cua sov, cov khoom sib, thiab lwm yam. Lub thermal ua haujlwm ntawm cov ntaub ntawv tsis tshua muaj, uas yog, cov thermal conductivity zoo. Qhov thib ob, cov qauv tsim yuav tsum tsim nyog, lub thermal conductivity ntawm txhua cov ntaub ntawv yuav tsum sib txuas zuj zus, thiab qhov sib txuas ntawm cov khoom siv yuav tsum yog qhov zoo kom tsis txhob muaj lub tshav kub-kev poob siab hauv lub tshav kub tawm thiab xyuas kom meej tias lub cua sov yog dissipated los ntawm txheej txheej mus rau txheej txheej. Nyob rau tib lub sijhawm, nws yuav tsum muaj kev ruaj ntseg ntawm cov txheej txheem uas kub yog faib tawm raws caij nyoog raws li cov cua sov ua ntej tsim los.

2. Kev xaiv ntawm cov kua nplaum

Raws li txoj cai ntawm kev zeem muag, thaum lub teeb nkag mus rau hauv nruab nrab ntawm optically-ntim nruab nrab ntawm qhov nruab nrab ntawm cov optically tuab, tag nrho emission tshwm sim thaum qhov teeb meem kaum tuaj txog ib qho nqi, uas yog, ib qho tseem ceeb lub kaum ntse ntse yog ntau dua los yog sib npaug zos rau qhov tseem ceeb. Rau GaN xiav chips, cov ntaub ntawv GaNe muaj kev txhawj xeeb ntawm 2.3. Thaum lub teeb ci tawm ntawm sab hauv ntawm cov dej ua siv mus rau saum cua, qhov tseem ceeb heev θ0 = kev txhaum-1 (n2 / n1) raws li txoj cai ntawm kev zeem muag.

Qhov twg n2 yog sib npaug li 1, piv txwv li, qhov ntsuas ntawm huab cua, thiab n1 yog qhov ntsuas ntawm GaN, uas qhov tseem ceeb lub kaum sab xis θ suav yog kwv yees li 25.8 degrees. Hauv qhov no, tsuas yog lub teeb nyob rau hauv lub kaum sab xis nqes nrog cov xwm txheej ≤ 25.8 degrees. Raws li cov lus ceeb toom, cov nqi sab nraud ntawm cov khes GaN yog tam sim no txog 30% rau 40%. Yog li ntawd, vim yog lub nqus dej ntawm lub khis siv lead ua, Qhov kev faib tawm ntawm lub teeb uas tuaj yeem tawm sab nraum lub siv lead ua yog qhov tsawg heev. Raws li cov lus ceeb toom, tus nqi sab nraud zoo ntawm GaN chips yog tam sim no thaj tsam 30% -40%. Ib yam li ntawd, lub teeb uas tawm los ntawm lub nti yuav tsum kis tau los ntawm cov khoom ntim rau qhov chaw, thiab tej yam ntawm cov khoom siv ntawm lub teeb pom kev zoo yuav tsum raug xam tias yog.

Vim li no, thiaj li ua kom lub teeb pom kev zoo ntawm cov khoom LED, cov nqi ntawm n2 yuav tsum tau nce, uas yog, qhov kev ntsuas ntawm cov khoom pob txhim kho kom ntau ntxiv los txhim kho lub kaum sab xis ntawm cov khoom, qhov no ua kom lub pob luminous efficiency ntawm cov khoom. Nyob rau tib lub sij hawm, lub teeb ntawm lub teeb los ntawm encapsulating cov khoom yog me me. Yuav kom nce qhov kev faib ua feem ntawm ntsig lub teeb, qhov zoo ntawm lub pob yog qhov zoo tshaj plaws arched los yog hemispherical, yog li ntawd thaum lub teeb tawm ntawm cov ntaub npog encapsulating rau saum huab cua, nws yog yuav luag txhua tus neeg kom sib txuas thiab tsis ua rau tag nrho cov kev xav txog.

3. Kev xav ua

Muaj ob txoj hauv kev ntawm txoj kev xav txog. Ib qho yog txoj kev xav hauv lub nti. Qhov thib ob yog qhov kev xav ntawm lub teeb los ntawm pob khoom. Los ntawm ob qho tib si lub sab hauv thiab sab nraud reflection kev, qhov kev faib ua feem ntawm lub teeb emitted los ntawm lub nti yog nce kom txo tau lub nqus dej ntawm lub nti. Txhim kho cov luminous efficiency ntawm cov khoom siv hluav taws xob LED. Los ntawm cov seem ntawm lub ntim, qhov fais fab-xim LED feem ntau sib dho rau ntawm tus pas hlau los yog cov substrate uas muaj cov kab noj ua ke. Cov leeg thev ua rau cov kab noj hniav feem ntau yog siv los txhim kho cov teebmeem ntawm plating, thaum lub substrate-based kab noj hniav feem ntau yog ci ntsa iab. Cov hau kev yuav tsum tau siv electroplating kho, tab sis cov saum toj no ob txoj kev cuam tshuam los ntawm lub precision thiab txheej txheem ntawm cov pwm. Cov kev xav ntawm kab noj hniav tom qab ua tau muaj qee yam kev txav sib luag, tab sis nws tsis yog qhov zoo tag nrho. Tam sim no, nyob rau hauv domestic qhuav ntawm substrate-hom reflective kab noj hniav, cov nyhuv reflective yog ploj vim yog tsis txaus polishing raug lossis oxidation ntawm hlau plating. Qhov no ua rau muaj ntau lub teeb rays yuav tsum muab ntxig rau tom qab ntaus lub cheeb tsam thiab lub zog tsis pom zoo rau lub teeb ci ntsa iab raws li lub hom phiaj uas tau npaj, ua rau lub sijhawm tshwm sim Qhov kev ua haujlwm ntawm lub teeb rho tawm tom qab ntim yog tsawg.

4. Kev xaiv phosphor thiab txheej

Rau cov fais fab teeb dawb, qhov nce ntawm kev ua kom zoo dua qub kuj yog hais txog kev xaiv ntawm phosphors thiab kev ua haujlwm. Yuav kom txhim kho cov kev ua ntawm phosphor kom muaj siab rau cov xiav nti, qhov kev xaiv thawj phosphor yuav tsum tsim nyog, nrog rau kev ua kom muaj zog wavelength, loj me me, thiab kev ua kom tau zoo, thiab lwm yam. Nws xav kom muaj kev ntsuam xyuas ntau npaum li cas los mus ntsuas tus nqi ntau yam . Secondly, tus phosphor txheej yuav tsum yog yam zoo, thiab nws yog qhov zoo tshaj tias lub thickness ntawm cov txheej nplaum ntawm txhua lub teeb emitting nto ntawm lub teeb emitting nti yog teeb thiaj li tiv thaiv lub teeb pom kev ntawm emitted ntawm uneven thickness, thiab qhov zoo ntawm Lub teeb pom kev zoo tuaj yeem kho tau.

Ib qho zoo hauv cov hluav taws xob dissipation tsim muaj cov nyhuv tseem ceeb ntawm kev txhim kho cov kev ua kom muaj zog ntawm cov khoom siv hluav taws xob, thiab nws yog ib qho tseem ceeb rau kev tsim khoom lub neej thiab kev cia siab. Kev tsim ua kom pom zoo, cov khoom tsim, cov khoom siv, thiab cov txheej txheem kev kho cov kab noj ua ke, muaj kua nplaum, thiab lwm yam yog kev nyuab siab ntawm no, thiab lub teeb-emitting efficiency ntawm lub fais fab-xim LED tuaj yeem kho tau zoo dua . Rau cov fais fab-hom dawb LEDs, kev xaiv ntawm phosphors thiab cov txheej txheem tsim kuj tseem ceeb heev rau kev txhim kho ntawm qhov chaw thiab kev txhim kho ntawm cov txiaj ntsig zoo.