Kev soj ntsuam ntawm Lub Teeb Siv Los ntawm Cov Khoom Coj
Pa roj yog feem ntau bracket, siv cov pob epoxy pob, lub hwj huam yog me, tag nrho luminous flux tsis loj, siab ci yuav tsuas yog siv raws li qee tus tshwj xeeb teeb pom kev zoo. Nrog LED nti siv tshuab thiab kev tsim cov ntim tshuab, ua kom pom ntawm lub teeb pom kev zoo siab ntawm cov teeb pom kev zoo ntawm cov teeb pom kev zoo, lub zog LED maj mam mus ua lag luam. Qhov fais fab loj no feem ntau yog lub teeb taws-emitting nti rau hauv lub dab dej kub, qhov sib dhos ntawm qhov muag lo ntsiab muag ntawm qhov muag lo rau optical nrig tis qis, lub lens nrog cov uas tsis muaj kev ntxhov siab yooj yim silicone.
Fais fab LED mus tiag tiag rau ntawm qhov teeb pom kev zoo, ua kom txhua hnub teeb pom kev ntawm tsev neeg, nws cov teeb meem yuav tsum tau daws muaj ntau yam, ib qho tseem ceeb tshaj yog kev ua kom zoo tshaj. Tam sim no nyob rau hauv lub lag luam fais fab tuag LED qhia tshaj plaws lumen efficiency ntawm 50lm / W los yog li ntawd, deb tsawg dua txhua hnub raws ntawm tsev neeg teeb pom kev zoo. Thiaj li yuav ua kom lub zog zoo luminous efficiency, ntawm qhov one tes qhov kev ua haujlwm ntawm nws lub teeb nti kom zoo tuaj; qhov tod tes, lub zog LED ntim tshuab tseem xav tau ntxiv txhim kho, los ntawm cov qauv tsim, cov khoom siv tshuab thiab cov txheej txheem siv tshuab thiab lwm yam kev txhim kho cov khoom kom zoo.
Ua ntej, qhov cuam tshuam ntawm lub teeb ntawm lub teeb pom kev zoo ntawm cov khoom ntim
Cov tshuab cua txias
Rau cov teeb pom kev tawm ntawm lub teeb pom kev zoo ntawm PN, thaum lub sijhawm tam sim no ntws los ntawm PN, lub PN hlawv muaj cua sov, uas tau tawm hauv cov huab cua ntawm cov nplaum, cov khoom potting, cov cua kub, thiab lwm yam, thaum lub sijhawm no. Ib feem ntawm cov khoom muaj thermal tsis kam tiv thaiv kom tsis txhob muaj cua sov, uas yog thermal ua hauj, thermal ua hauj lwm los ntawm cov khoom loj me, qauv thiab khoom txiav txim los ntawm tus nqi ruaj. Lub thermal kuj ntawm LED yog Rth ( ℃ / W) thiab qhov hluav taws xob dissipation zog yog PD (W). Nyob rau lub sij hawm no, qhov ntsuas kub ntawm PN hlav yog nce vim yog lub cua sov poob ntawm qhov tam sim no:
T ( ° C) = Rth × PD.
PN jawg kub yog:
TJ = TA + Rth × PD
Qhov twg TA yog qhov kub thiab txias. Vim qhov nce hauv qhov kub thiab txias yuav ua rau qhov tshwm sim ntawm PN hlw kom qis tsawg dua, qhov ci ntawm lub teeb-emitting diodes yuav tsis kam. Tib lub sij hawm, vim muaj cua sov poob los ntawm qhov nce hauv qhov kub, lub teeb-emitting diode brightness yuav tsis txuas ntxiv nrog rau qhov kev faib ua feem ntawm qhov tam sim no, uas qhia tias kub sov phenomenon. Tsis tas li ntawd, raws li qhov kev sib tshuam sov nce siab, lub ncov siab tshaj ntawm lub teeb emission yuav tawm mus ntev ntev, txog 0.2-0.3 nm / ° C. Rau cov dawb LED tau los ntawm sib tov lub YAG phosphor coated nrog xiav nti, Drift, yuav ua rau muaj kev tsis haum nrog lub phosphor excitation wavelength, ua rau kom tsis txhob muaj qhov luminous tag nrho ntawm cov dawb LED, thiab ua kom muaj xim dawb xim hloov.
Rau cov hwj huam teeb-emitting diodes, tus tsav tam sim no feem ntau ntau tshaj li ob peb puas millamperes, PN txuas tam sim no ceev yog loj heev, yog li PN junction kub heev. Rau lub ntim thiab daim ntawv thov, yuav ua li cas kom tsis txhob thermal resistance ntawm cov khoom, yog li ntawd lub tshav kub generated los ntawm PN hlub yuav tawm sai li sai tau, tsis tsuas yog yuav txhim kho cov khoom muag tam sim no, txhim kho cov khoom zoo luminous, tab sis kuj zoo tuaj Cov khoom siv kev cia siab thiab lub neej Qhov yuav kom tsis txhob thermal resistance ntawm cov khoom, qhov kev xaiv thawj cov khoom ntim yog qhov tseem ceeb, xws li cov cua kub dab, nplaum, thiab lwm yam. Qhov thib ob, cov qauv tsim yuav tsum tsim nyog, lub thermal conductivity ntawm cov khoom ntawm qhov sib nruam sib xws, cov khoom nruab nrab ntawm kev thermal kev txuas zoo, kom tsis txhob muaj cua sov generated nyob rau hauv tshav kub yeeb nkab bottleneck los xyuas kom meej tias kub hauv lub puab mus rau txheej txheej ntawm kev faib tawm. Nyob rau tib lub sijhawm, los ntawm tus txheej txheem los xyuas kom meej tias cov cua sov hauv raws li cov kab ua ntej tsim txias channel rau lub caij nyoog tawm.
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