Sab nraum zoov LED zaub, nrog rau lawv qhov zoo ntawm kev txuag hluav taws xob, kev phooj ywg ib puag ncig, thiab kev ua neej ntev, tau qhia txog kev loj hlob dav dav hauv cov khoom siv niaj hnub no. Txawm li cas los xij, raws li cov khoom siv sab nraum zoov, LED qhia inevitably ntsib ntau yam teeb meem ib puag ncig, ntawm cov kub kub muaj qhov cuam tshuam tshwj xeeb rau lawv cov kev ua tau zoo thiab kev ua neej nyob.
I. Kub kub ua rau ua kom tiav kev puas tsuaj rau LED zaub
Thaum ua haujlwm kub siab tshaj qhov load-cov kabmob txwv ntawm LED nti, cov teeb meem loj yuav tshwm sim:
1. Nruj txo qis hauv Luminous Efficiency: Thaum qhov kev khiav hauj lwm kub ntawm ib qho LED zaub tshaj qhov ntsuas load-cov kabmob kub ntawm cov nti, nws cov luminous efficiency yuav txo qis, ua rau lub teeb pom kev zoo, thiab nyob rau hauv qhov hnyav, txawm tias muaj kev puas tsuaj mus tas li. Qhov kev puas tsuaj no yog irreversible thiab yuav cuam tshuam ncaj qha rau kev siv ntawm cov zaub.
2. Degeneration thiab tsis ua hauj lwm ntawm cov ntaub ntawv encapsulation: LED zaub feem ntau siv pob tshab epoxy resin rau encapsulation. Thaum qhov sib txuas kub siab tshaj qhov khoom-theem hloov pauv kub (feem ntau yog 125 degree), cov khoom siv encapsulation tau hloov mus rau theem, hloov ntawm cov khoom mus rau lub xeev rubbery, thiab cov coefficient ntawm thermal expansion nce sharply. Qhov kev hloov no yuav ua rau deformation ntawm cov qauv encapsulation, ua rau muaj kev ua txhaum loj xws li luv luv Circuit Court, thaum kawg ua rau kev puas tsuaj tag nrho ntawm cov zaub.
II. Kev kub siab ua kom luv luv LED zaub Lifespan
Lub neej ntev ntawm LED zaub yog feem ntau ntsuas los ntawm nws cov yam ntxwv ntawm lub teeb lwj, txhais tau hais tias qhov ci ntsa iab maj mam txo lub sijhawm kom txog thaum nws kawg kaw. Kev lag luam feem ntau txhais lub neej ntawm LED zaub raws li lub sijhawm nws siv rau nws cov luminous flux kom txo qis los ntawm 30%.
Cov laj thawj tseem ceeb rau lub teeb lwj los ntawm qhov kub thiab txias yog:
1. Diffusion ntawm Chip Material Defects: Nyob rau hauv qhov kub thiab txias, me me tsis xws luag nyob rau hauv lub LED nti khoom sai sai diffuse thiab replicate, nws thiaj li infiltrating lub teeb - emitting cheeb tsam thiab tsim ntau yam uas tsis yog - radiative recombination chaw, heev txo lub luminous efficiency ntawm LED zaub. Nyob rau tib lub sijhawm, qhov kub thiab txias ua rau lub diffusion ntawm impurities nyob rau hauv lub interface thiab Circuit Court board, ntxiv exacerbating lub teeb lwj txheej txheem.
2. Degradation ntawm Encapsulation Material Performance: Transparent epoxy resin undergoes denaturation thiab yellowing nyob rau hauv siab kub, heev cuam tshuam nws lub teeb transmittance. Qhov siab dua qhov kev ua haujlwm kub, qhov txheej txheem degradation sai dua, qhov tseem ceeb ua rau LED teeb pom kev puas tsuaj.
3. Kev tsis zoo ntawm Phosphor Performance: Phosphors nthuav tawm lub teeb pom kev zoo nyob rau hauv qhov kub thiab txias, uas kuj yog ib qho laj thawj tseem ceeb rau tag nrho lub teeb tawg ntawm sab nraum zoov LED zaub.
Nws yog ib qho tsim nyog sau cia tias ntau hom ntawm LED qhia pom qhov sib txawv ntawm lub teeb tawg vim qhov sib txawv ntawm cov khoom xaiv thiab cov txheej txheem tsim khoom. LED zaub manufacturers muab cov qauv teeb pom kev zoo nkhaus rau cov neeg siv khoom siv. Nws yog ib qho tseem ceeb kom paub meej tias lub teeb flux lwj ntawm LED cov lus tshwm sim los ntawm qhov kub thiab txias yog irreversible; Lub teeb flux ua ntej qhov kev puas tsuaj tsis tuaj yeem tshwm sim yog hu ua "thawj lub teeb flux" ntawm LED zaub.
III. Kub Kub Txo LED Zaub Luminous Efficiency
Cov kub kub txo cov luminous efficiency ntawm LED zaub nyob rau hauv ob peb txoj kev:
1. Tsawg Electron Mobility: Raws li qhov kub thiab txias nce, qhov concentration ntawm electrons thiab qhov nce, qhov sib txawv ntawm qhov band yuav txo, thiab electron kev txav mus los txo qis, ncaj qha cuam tshuam rau cov conductivity thiab luminous efficiency ntawm LED.
2. Txo Internal Quantum Efficiency: Qhov kub thiab txias yuav txo qhov tshwm sim ntawm electron- qhov recombination nyob rau hauv lub peev xwm zoo, ua rau qhov tshwm sim ntawm tsis yog -radiative recombination (kub tiam), yog li txo cov internal quantum efficiency ntawm LED zaub.
3. Kev sib tw tsis muaj zog: Qhov kub nce siab ua rau lub teeb xiav lub ncov ntawm lub nti hloov mus rau qhov ntev wavelengths, uas ua rau tsis sib haum xeeb ntawm cov nti lub emission wavelength thiab phosphor excitation wavelength, txo cov teeb pom kev zoo sab nraud ntawm LED zaub.
4. Txo Quantum Efficiency ntawm Phosphors: Nyob rau hauv qhov kub thiab txias, quantum efficiency ntawm phosphors txo qis, uas ua rau tsis muaj zog luminous siv thiab ib tug poob nyob rau hauv lub sab nraud lub teeb extraction efficiency ntawm LED zaub panels.
5. Kev hloov pauv hauv Encapsulation Material Performance: Kev ua haujlwm ntawm silicone yog cuam tshuam los ntawm qhov kub thiab txias. Raws li qhov kub thiab txias, cov thermal stress hauv silicone nce, thiab cov refractive index txo, ntxiv rau cov luminous efficiency ntawm LED zaub.
IV. Kev kub kub cuam tshuam rau LED Zaub Wavelength (xim): Cov yam ntxwv wavelength ntawm LED cov lus qhia feem ntau muab faib ua lub ncov wavelength thiab dominant wavelength. Lub ncov wavelength yog lub wavelength nrog lub teeb siab tshaj plaws, thaum lub zog wavelength yog txiav txim los ntawm X thiab Y chromaticity ua haujlwm thiab qhia txog cov xim pom los ntawm tib neeg lub qhov muag.
Mechanism of High Temperature's Impact on Wavelength: Lub bandgap ntawm LED zaub cov khoom siv luminescent ncaj qha txiav txim siab nws lub wavelength lossis xim yam ntxwv. Raws li qhov kub thiab txias nce, qhov bandgap ntawm cov khoom txo qis, ua rau kom ntev emission wavelength thiab redshift phenomenon nyob rau hauv cov xim. Qhov kev hloov wavelength no ncaj qha ua rau muaj kev hloov pauv ntawm cov xim ntawm LED pom pom los ntawm tib neeg lub qhov muag, cuam tshuam rau qhov sib xws thiab qhov tseeb ntawm cov khoom siv.
V. Kev Tiv Thaiv Kev Kub Ntxhov Siab Tshaj Tawm Tam sim no ntawm LED Cov Lus Qhia: Ntxiv rau cov kev cuam tshuam saum toj no, siab - qhov kub thiab txias ib puag ncig kuj txwv qhov siab tshaj plaws txhaj tshuaj tam sim no ntawm LED zaub. Txhawm rau ua kom muaj kev nyab xeeb ntawm LED chips, tsav tam sim no yuav tsum tau hloov kho raws li qhov ntsuas kub ua haujlwm. Qhov no, rau qee qhov, txwv qhov kev hloov pauv qhov ci thiab qhov ua tau zoo ntawm lub vijtsam LED.
Raws li cov kev soj ntsuam saum toj no qhia tau hais tias, siab - qhov kub thiab txias ib puag ncig muaj ntau yam kev cuam tshuam thiab cuam tshuam loj rau sab nraum zoov LED zaub, cuam tshuam rau cov cim kev ua haujlwm tseem ceeb xws li lifespan, luminous efficiency, display effect, thiab kev ntseeg tau. Yog li ntawd, rau sab nraum zoov LED zaub, kev tswj qhov kub thiab txias tsis yog tsuas yog ib qho tseem ceeb rau kev ua haujlwm zoo xwb, tab sis kuj yog ib qho tseem ceeb hauv kev ua neej ntev thiab txhim kho cov khoom zoo.
Hauv kev siv cov tswv yim, qhov chaw ua haujlwm kub ntawm lub vijtsam LED yuav tsum tau txiav txim siab tag nrho, thiab kev ntsuas kub kom zoo yuav tsum tau ua, xws li kev txhim kho cov qauv hluav taws xob kom zoo, siv cov khoom siv hluav taws xob zoo heev, thiab muab cov khoom siv hluav taws xob zoo. Qhov no ua kom ntseeg tau tias lub vijtsam LED tuaj yeem ua haujlwm ruaj khov thiab muaj kev ntseeg siab nyob rau hauv ntau yam kev mob ib puag ncig, muab cov neeg siv nrog cov txiaj ntsig zoo.
