Tsis txhob nqa mus los ntawm ntau qhov zoo uas LED teeb pom kev zoo muab. Txawm hais tias qhov kev siv tshuab no tsis yog qhov tseem ceeb ntawm kev txhim kho hauv keeb kwm ntawm hluav taws xob teeb pom kev zoo, nws kuj nthuav tawm cov teeb meem tshwj xeeb. Lub lag luam teeb pom kev zoo tam sim no tab tom cuam tshuam nrog kev kub ntxhov ntawm qhov loj me uas nws tsis tau ntsib ua ntej. Engineering thiab tsim kev xav tau hloov pauv los ntawm cov teeb pom kev zoo hauv lub xeev. Kev tswj teeb pom kev zoo tam sim no yog cov hluav taws xob hluav taws xob ntau dua li cov teeb pom kev yooj yim. Nyob rau hauv lwm yam lus, teeb pom kev zoo system tsim yog heev intricate. LEDs yog cov khoom siv hluav taws xob semiconductor uas nws tus kheej tshav kub, tam sim no-rhiab, thiab tsim ntau lub teeb. Qhov no ua rau qhov teeb meem loj tshaj plaws nrog LED teeb pom kev zoo vim tias muaj ntau yam kev ua haujlwm yog qhov tseem ceeb rau kev ua haujlwm thiab kev cia siab. Cov txheej txheem engineering thiab kev tsim qauv ntawm LED teeb pom kev zoo kuj tseem suav nrog lwm cov ntsiab lus ntxiv rau LED pob metrics. Kev tswj cua sov, kev tswj xyuas tam sim no, thiab kev tswj kho qhov muag tsuas yog qee qhov kev sib txuas ntxiv sib txawv ntawm kev ua si.
Cov kws tshaj lij los ntawm qhov deb feem ntau tsim cov npe ntev ntawm qhov tsis zoo rau LED teeb pom kev zoo. Lawv kuj tseem yuav tsis ua tsis tiav los qhia txog qhov txaus ntshai ntawm lub teeb xiav los ntawm LED teeb pom kev zoo txhawm rau ua kom cov dab neeg nthuav. Nyob rau hauv qhov tseeb, lub teeb dawb yog ib tug synthesis ntawm wavelengths los ntawm ob peb xim bands. Txawm hais tias lub teeb los ntawm lub teeb tsim los, txhua cov xim dawb nrog tib xim saib muaj ze li qhov sib npaug ntawm xiav wavelengths hauv qhov pom spectrum. Cov xim kub sib txheeb (CCT) tuaj yeem siv los piav qhia lub xim ntawm lub teeb dawb. Lub teeb ci CCT feem ntau hais txog qhov xiav nws yog li cas. Qhov feem pua ntawm xiav wavelengths nce nrog CCT. Xiav hluav taws xob los ntawm 3000 K LED khoom yog tsawg npaum li ntawd los ntawm 3000 K incandescent teeb nyob rau hauv tib luminance thiab illuminance xwm txheej, thaum xiav hluav taws xob los ntawm 6000 K LED khoom yog siab npaum li ntawd los ntawm 6000 K fluorescent teeb. Qhov teeb meem xiav xiav tsis tshua muaj teeb meem nrog cov LEDs dawb, raws li nws yog nrog rau lwm qhov chaw teeb pom kev zoo. Kev tsim vaj tsev ntawm lub teeb dawb lub spectrum pleev yog qhov txiaj ntsig tseem ceeb ntawm LED thev naus laus zis. Txhua qhov sib xyaw ua ke ntawm lub teeb uas muaj txiaj ntsig zoo rau tib neeg kev noj qab haus huv thiab kev noj qab haus huv tuaj yeem tsim nrog LED teeb pom kev zoo. Txhawm rau hloov kho kom muaj nuj nqis ntawm cov hluav taws xob xiav rau kev noj qab haus huv spectrum ntawm lub teeb dawb, tib neeg lub teeb pom kev zoo, kev siv thev naus laus zis tseem ceeb uas txhawb kev nthuav dav ntawm kev lag luam teeb pom kev zoo, siv lub peev xwm ntawm CCT tuning ntawm LED systems.
Nyob rau hauv qhov tseeb, LED teeb pom kev tsuas muaj ib tug me me ntawm inherent drawbacks.
LED teeb pom kev zoo tshaj plaws qhov tsis zoo yog tias nws ua kom muaj cua sov ua qhov tshwm sim. Vim tias lawv tsim cov cua sov hauv cov khoom ntim ntau dua li cov hluav taws xob hluav taws xob nyob rau hauv daim ntawv ntawm cov hluav taws xob infrared, LEDs hu ua cov khoom siv hluav taws xob muag. Ib qho LED hloov ib ncig ntawm ib nrab ntawm cov hluav taws xob hluav taws xob uas nws tau txais mus rau hauv tshav kub, uas yuav tsum tau nqa lub cev los ntawm lub thermal channel. Lub kinetics ntawm tsis ua hauj lwm mechanisms xws li atomic defect ntau lawm thiab kev loj hlob nyob rau hauv lub active cheeb tsam ntawm lub diode, carbonization thiab yellowing ntawm lub encapsulant, thiab staining ntawm lub hnab yas ntim yuav tsum tau ceev yog hais tias tus ntaus ntawv hlws ris kub yog tsis khaws cia hauv qab ib tug tej yam kev txwv. Rau txhua txhua 10 degree C nce nyob rau hauv hlws ris kub siab tshaj qhov siab tshaj plaws nyob rau hauv hlws ris kub, ib tug LED lub neej kev pab cuam yuav raug txo los ntawm 30 feem pua mus rau 50 feem pua.
Qhov tseeb tias LEDs yog cov khoom siv hluav taws xob tsis zoo yog ob qho tib si tsis txaus siab thiab qhov kev txwv phem tshaj plaws ntawm LED teeb pom kev zoo. Lawv muaj kev nyiam noj mov heev; tsav tam sim no. Lub siab mus tom ntej tam sim no rhiab heev ntawm LEDs muaj qhov zoo thiab qhov tsis zoo. Nws txhim kho kev tswj hwm ntawm lub teeb pom kev zoo tab sis kuj ua rau nws nyuaj heev los tswj kev tsav tsheb tam sim no. Kev tsav tsheb tam sim no tuaj yeem hloov pauv los ntawm qhov tsawg heev, uas tuaj yeem cuam tshuam rau lub teeb pom kev zoo. LEDs yog cov khoom siv DC tsav, tab sis lawv feem ntau yuav tsum tau siv los ntawm AC qhov chaw. Cov zis tam sim no los ntawm tus tsav tsheb mus rau LEDs tseem tuaj yeem muaj qhov seem ripple (residual periodic fluctuation) yog tias qhov hloov pauv waveform tsis ua tiav tom qab kho. Vim qhov ripple no, cov LEDs ntsais ntawm qhov zaus uas yog 100Hz lossis 120Hz, uas yog ob zaug nrawm dua li cov kab hluav taws xob nkag. Kev sib tshuam ntawm LEDs 'hluav taws xob thiab thermal systems nyuaj rau kev tswj hwm ntxiv. Tus nqi hluav taws xob muab rau LED txo qis raws li qhov kub thiab txias nce, qhov hluav taws xob rau pem hauv ntej poob, thiab lwm yam. Ntawm qhov tod tes, tus nqi ntawm cov hluav taws xob hluav taws xob uas tsim los ntawm cov khoom siv hluav taws xob semiconductor tuag nce hauv kev faib ua feem rau kev tsav tsheb tam sim no. Kev tsav tsheb dhau ntawm LED saum nws lub peev xwm ntsuas yuav ua rau thermal khiav tawm thiab kev tawg ntxov ntawm LED. Hluav taws xob overstresses (EOS) yog qhov txaus ntshai uas ua rau muaj kev pheej hmoo tshaj plaws rau LEDs, txawm li cas los xij. Thaum cov khoom ntsuas qhov ntsuas siab tshaj plaws tau dhau los ntawm kev tsav tsheb tam sim no lossis qhov hluav taws xob, EOS tshwm sim. Cov hluav taws xob overstresses tuaj yeem muaj ntau yam tshwm sim, xws li electrostatic paug (ESD), inrush tam sim no, los yog lwm yam kev hloov hluav taws xob. Vim yog LEDs 'sensitive mus rau ntau yam hluav taws xob stressors, nruj tswj kev tsav tsheb tam sim no yuav tsum tau.
Qhov tseeb tias LEDs muaj lub siab flux ntom ntom yog ib qho kev tsis xav thib peb. Glare tuaj yeem tsim los ntawm lub teeb ci hnyav ntawm cov teeb pom kev ncaj qha. High luminances nyob rau hauv lub zeem muag yuav ua rau tsis pom kev (kev tsis taus glare) los yog ua rau koj xav tias khaus lossis tsis xis nyob (tsis xis nyob glare). Kev tsim ntawm lub luminaire tuaj yeem suav nrog cov khoom siv kho qhov muag ntxiv kom txo qis glare, txawm hais tias ua li ntawd feem ntau ua rau muaj qhov tsis zoo ntawm qhov muag.
Qhov kawg tab sis tsis kawg, piv rau cov khoom siv teeb pom kev zoo, ntau qhov system complexity ua rau cov nqi pib ntau dua rau cov khoom siv LED. Vim li no, tus nqi optimization yog qhov tseem ceeb rau cov txheej txheem ntawm kev tsim luminaires. Ib tug series ntawm cov teeb meem yuav tshwm sim thaum tus nqi siab overcomes cov khoom 'dependability thiab kev ua tau zoo.
