Lub neej ntawm cov khoom siv hluav taws xob
Nws yog qhov nyuaj los qhia qhov tseeb ntawm lub neej ntawm ib qho khoom siv hluav taws xob ua ntej nws ua tsis tiav, txawm li cas los xij, tom qab qhov tsis ua tiav ntawm ib pawg ntawm cov khoom siv hluav taws xob tau txhais, ntau tus yam ntxwv ntawm lub neej uas qhia txog nws qhov kev ntseeg tau tuaj yeem tau txais, xws li lub neej nruab nrab. , txhim khu kev qha lub neej, nruab nrab lub neej yam ntxwv lub neej, thiab lwm yam.
(1) Lub neej nruab nrab μ: hais txog lub neej nruab nrab ntawm ib pawg ntawm cov khoom siv hluav taws xob.
(2) Kev ntseeg tau lub neej T: yog hais txog lub sijhawm ua haujlwm tau ntsib thaum qhov kev ntseeg siab R (t) ntawm ib pawg ntawm cov khoom siv hluav taws xob poob rau y.
(3) Lub neej nruab nrab: hais txog lub neej ntawm cov khoom thaum qhov kev ntseeg siab R (t) yuav yog 50%.
(4) Lub neej yam ntxwv: yog hais txog kev ntseeg siab ntawm cov khoom R (t) txo rau
1 / e teev ntawm lub neej.
4.2, LED lub neej
Yog tias koj tsis xav txog qhov tsis ua haujlwm ntawm lub zog hluav taws xob thiab kev tsav tsheb, lub neej ntawm LED tau pom nyob rau hauv nws lub teeb lwj, uas yog, raws li lub sijhawm mus, qhov ci ntsa iab yuav tsaus thiab tsaus kom txog thaum kawg tua. Nws feem ntau txhais tau tias yuav lwj 30% ntawm lub sijhawm raws li nws lub neej.
4.2.1 Lub teeb lwj ntawm LED
Feem ntau dawb LED yog tau los ntawm daj phosphor irradiated los ntawm xiav LED. Muaj ob lub ntsiab yog vim li casLED teeblwj, ib qho yog lub teeb lwj ntawm xiav LED nws tus kheej, lub teeb lwj ntawm xiav LED yog deb tshaj qhov liab, daj, ntsuab LED. Lwm qhov yog lub teeb lwj ntawm phosphorus, thiab qhov attenuation ntawm phosphors ntawm qhov kub thiab txias yog qhov hnyav heev.
Ntau hom ntawm LED nws lub teeb lwj yog txawv. Feem ntauLED manufacturerstuaj yeem muab tus qauv lub teeb lwj nkhaus. Piv txwv li, lub teeb lwj nkhaus ntawm Cree hauv Tebchaws Meskas tau qhia hauv daim duab 1.
Raws li tau pom los ntawm daim duab, lub teeb lwj ntawm LED yog 100
Thiab nws qhov kev sib tshuam kub, qhov hu ua kev sib tshuam kub yog ib nrab 90
Qhov kub thiab txias ntawm tus neeg xyuas pib PN kev sib tshuam, qhov siab dua qhov kub ntawm qhov sib txuas ua ntej
Muaj lub teeb lwj, uas yog, lub neej luv dua. Los ntawm daim duab 80
Raws li tuaj yeem pom, yog tias qhov sib txuas kub yog 105 degrees, qhov ci ntsa iab poob mus rau 70% ntawm lub neej tsuas yog kaum txhiab 70 Junction Tenpeature (C) 105 185 175 55 45
Sij hawm, muaj 20,000 teev ntawm 95 degrees, thiab qhov sib txuas kub
Txo rau 75 degrees, lub neej expectancy yog 50,000 teev, 50
Daim duab 1. Lub teeb lwj nkhaus ntawm Cree's LELED
Thaum qhov kub ntawm qhov sib txuas tau nce los ntawm 115 ° C mus rau 135 ° C, lub neej yuav raug txo los ntawm 50,000 teev mus rau 20,000 teev. Cov kab nrib pleb ntawm lwm lub tuam txhab yuav tsum muaj los ntawm lub Hoobkas thawj.
O4.2.2 Tus yuam sij rau kev ncua lub neej: txo nws qhov kub thiab txias
Tus yuam sij kom txo qhov kub ntawm qhov sib txuas yog kom muaj lub dab dej kub zoo. Cov cua sov tsim los ntawm LED tuaj yeem tso tawm raws sijhawm.
Feem ntau cov LED yog welded rau aluminium substrate, thiab aluminium substrate yog ntsia rau ntawm lub tshav kub exchanger, yog hais tias koj tsuas ntsuas qhov kub thiab txias ntawm lub tshav kub exchanger plhaub, ces koj yuav tsum paub tus nqi ntawm ntau thermal resistance los xam cov hlws ris. kub. Xws li Rjc (kev sib tshuam mus rau vaj tse), Rcm (lub tsev rau aluminium substrate, qhov tseeb, uas yuav tsum muaj xws li thermal tsis kam ntawm zaj duab xis luam tawm), Rms (txhuas substrate rau radiator), Rsa (radiator rau huab cua), uas tsuav yog muaj cov ntaub ntawv tsis raug yuav cuam tshuam qhov tseeb ntawm qhov kev xeem.
Daim duab 3 qhia txog daim duab schematic ntawm txhua qhov thermal kuj ntawm LED mus rau lub radiator, uas muaj ntau thermal resistance ua ke, ua rau nws qhov tseeb ntau txwv. Uas yog hais, qhov tseeb ntawm inferring qhov sib txuas kub los ntawm ntsuas kub dab dej saum npoo kub yog qhov phem dua.
Kub coefficient ntawm volt-ampere yam ntxwv ntawm O LED
O Peb paub tias LED yog ib qho semiconductor diodes, uas, zoo li tag nrho cov diodes
Nws muaj ib tug volt-ampere yam ntxwv, uas muaj ib tug kub yam ntxwv. Nws cov yam ntxwv yog tias thaum kub nce, tus yam ntxwv volt-ampere hloov mus rau sab laug. Daim duab 4 qhia txog qhov kub thiab txias ntawm LED cov yam ntxwv volt-ampere.
Piv txwv tias cov LED tau muab nrog qhov tam sim no tam sim no, qhov voltage yog V1 thaum qhov sib txuas kub yog T1, thiab thaum qhov sib txuas kub nce mus rau T2, tag nrho volt-ampere yam ntxwv hloov mus rau sab laug, tam sim no lo tsis hloov, thiab qhov voltage ua V2. Ob qhov sib txawv voltage no raug tshem tawm los ntawm qhov kub thiab txias kom tau txais qhov kub coefficient, qhia hauv mvic. Rau qhov zoo tib yam silicon diodes qhov kub coefficient yog -2 mvic.
Yuav ua li cas ntsuas qhov kub thiab txias ntawm LED?
Lub LED yog ntsia rau hauv lub tshav kub exchanger thiab lub tas mus li tsav tam sim no yog siv raws li lub hwj chim mov. Nyob rau tib lub sijhawm, ob lub xov hlau txuas nrog LED tau kos tawm. Txuas lub ntsuas hluav taws xob mus rau qhov tso zis (qhov zoo thiab qhov tsis zoo ntawm LED) ua ntej lub hwj chim qhib, Tom qab ntawd tig lub hwj chim, thaum lub LED tseem tsis tau sov, tam sim ntawd nyeem cov ntawv nyeem ntawm lub voltmeter, uas yog sib npaug. mus rau tus nqi ntawm V1, thiab tom qab ntawd tos tsawg kawg yog 1 teev, yog li nws tau mus txog qhov sib npaug ntawm thermal, thiab tom qab ntawd ntsuas dua, qhov hluav taws xob ntawm ob qhov kawg ntawm LED yog sib npaug rau V2. Tshem tawm ob qhov txiaj ntsig no kom pom qhov sib txawv. Tshem nws los ntawm 4mV thiab koj tuaj yeem tau txais qhov sib txuas kub. Qhov tseeb, LED feem ntau yog ntau ntawm series thiab tom qab ntawd ua ke, nws tsis muaj teeb meem, tom qab ntawd qhov sib txawv ntawm qhov hluav taws xob yog tsim los ntawm ntau cov series LED kev koom tes, yog li faib qhov sib txawv ntawm qhov sib txawv los ntawm cov xov tooj ntawm cov series LED los faib los ntawm cov khoom siv hluav taws xob. 4mV, koj tuaj yeem tau txais nws qhov kub thiab txias.
4.3,LED teebtxoj sia nyob
LED lub neej tuaj yeem ncav cuag 1000000 teev?
Qhov no tsuas yog qib siab dua ntawm LED theoretical cov ntaub ntawv, raug tshem tawm qee qhov kev ciam teb (uas yog, cov xwm txheej zoo tagnrho) raws li cov ntaub ntawv, thiab LED hauv kev siv tiag tiag ntawm ntau yam cuam tshuam rau nws lub neej,
muaj plaub yam nram no:
1, chips
2, pob
3, teeb pom kev zoo tsim
4.3.1. Chip
Nyob rau hauv cov chav kawm ntawm LED manufacturing, lub neej ntawm LED yuav raug cuam tshuam los ntawm cov pa phem ntawm lwm yam impurities thiab cov impurities ntawm siv lead ua lattice. O4.3.2. Ntim
Txawm hais tias tom qab txheej txheem ntim ntawm LED yog qhov tsim nyog kuj yog ib qho tseem ceeb cuam tshuam rau lub neej ntawm LED teeb. Tam sim no, lub ntiaj teb cov tuam txhab loj xws li cree, lumilends, nichia thiab lwm cov qib siab ntawm LED ntim tau muaj kev tiv thaiv patent, cov tuam txhab no tom qab cov txheej txheem ntawm kev ntim khoom yog qib siab, LED lub neej thiab yog li lav.
Tam sim no, feem ntau cov tuam txhab muaj kev coj ua ntau dua ntawm LED tom qab txheej txheem ntim khoom, uas tuaj yeem pom los ntawm cov tsos, tab sis cov txheej txheem txheej txheem thiab cov txheej txheem tsis zoo, uas cuam tshuam rau lub neej ntawm LED;
Thaum tshav kub kub dissipation tsim
Txoj kev luv tshaj plaws ntawm kev hloov hluav taws xob, txo cov cua sov ua haujlwm; Ua kom cov kev sib nrig sib txuas thiab ua kom cov cua sov hloov ceev; Tsim nyog xam thiab tsim tshav kub dissipation cheeb tsam; Kev siv hluav taws xob muaj peev xwm ua tau zoo.
4.3.3. Luminaire tsim
Txawm hais tias lub teeb pom kev zoo tsim nyog kuj yog qhov teeb meem tseem ceeb cuam tshuam rau lub neej ntawm LED teeb. Tsim nyog lub teeb tsim nyob rau hauv tas li ntawd mus ntsib lwm yam taw qhia ntawm lub teeb, ib tug tseem ceeb yuav tsum tau emit lub tshav kub generated thaum lub LED yog li, uas yog, siv high-zoo LED thawj cov khoom ntawm Cree thiab lwm yam tuam txhab uas muag, siv nyob rau hauv txawv teeb. , LED lub neej tuaj yeem sib txawv los ntawm ob peb zaug lossis txawm kaum ob zaug. Piv txwv li, muaj kev muag khoom ntawm cov teeb pom kev sib xyaw ua ke ntawm lub lag luam (ib leeg 30W, 50W, 100W), thiab cov cua kub dissipation ntawm cov khoom no tsis du. Raws li qhov tshwm sim, qee cov khoom siv nyob rau hauv lub teeb ntawm 1 mus rau 3 lub hlis ntawm lub teeb tsis ua hauj lwm ntau tshaj 50%, qee cov khoom siv txog 0.07W ntawm lub hwj chim me me, vim tias tsis muaj qhov tsim nyog cov cua kub dissipation mechanism, ua rau lub teeb lwj sai heev. , thiab txawm tias qee qhov kev txhawb nqa hauv nroog, cov txiaj ntsig ua rau qee qhov tso dag. Cov khoom no muaj cov ntsiab lus tsis tshua muaj nqi, tus nqi qis thiab lub neej luv luv;
4.4.4 ib. Fais fab mov
Seb lub hwj chim ntawm lub teeb yog tsim nyog. LED yog ib qho khoom siv tsav tsheb tam sim no, yog tias lub zog tam sim no hloov pauv loj, lossis qhov zaus ntawm lub zog ntawm cov mem tes yog siab, nws yuav cuam tshuam rau lub neej ntawm LED teeb qhov chaw. Lub neej ntawm cov khoom siv hluav taws xob nws tus kheej yog nyob ntawm seb qhov kev tsim hluav taws xob tsim nyog puas tsim nyog, thiab nyob rau hauv qhov chaw ntawm lub hwj chim tsim nyog tsim, lub neej ntawm cov khoom siv hluav taws xob nyob ntawm lub neej ntawm cov khoom.
Tam sim no, LEDs yog siv nyob rau hauv peb qhov chaw loj:
1) Zaub: xws li qhov taw qhia teeb, teeb, ceeb toom teeb, zaub screen, thiab lwm yam.
Teeb pom kev zoo: teeb nyem, miner's teeb, coj teeb pom kev zoo, pab teeb pom kev zoo, thiab lwm yam.
3) Kev ua haujlwm hluav taws xob: xws li kev tshuaj lom neeg lom neeg, kev kho kom zoo nkauj, kho lub teeb, cog teeb pom kev zoo, thiab lwm yam.
Cov tsis tseem ceeb los ntsuas qhov kev ua tau zoo ntawm photoelectric ntawm LED yog qhia hauv Table 1.
| Radiation Function | Performance Display Lighting Function Radiation | kev faib tawm | Muaj nuj nqi hluav taws xob |
|
| Luminance los yog luminous siv ntawm optical zog, beam kaum sab xis thiab lub teeb siv | xim qauv, xim purity thiab lub ntsiab wavelength luminous flux (zoo luminous flux), luminous efficiency (lm / W), nruab nrab lub teeb siv, beam kaum sab xis, lub teeb siv faib, xim coordinates, xim kub, xim Performance index muaj zog hluav taws xob, zoo radiance, radiation siv zog faib, nruab nrab wavelength, ncov wavelength, bandwidth | tam sim no, unidirectional breakdown voltage, thim rov qab to tam sim no Photobiosafety retinal xiav Lub teeb raug tus nqi, qhov muag nyob ze ntawm ultraviolet kev phom sij raug tus nqi |
luminous flux yog dab tsi?
Tag nrho cov nyiaj emissions los ntawm lub teeb qhov chaw nyob rau hauv chav tsev lub sij hawm yog hu ua luminous flux, qhia los ntawm Φ
Chav tsev yog lumen (lm)
1w (wavelength 555 nm) = 683 lumen
Lub luminous flux ntawm qee qhov chaw teeb pom kev zoo:
Tsheb kauj vab teeb: 3W 30lm
Lub teeb dawb: 75W 900lm
Fluorescent teeb "TL"D 58W 5200lm
Lub cim ntawm lub teeb xav tau los ntawm LED illumination
Plaub qhov yooj yim ntsuas ntawm teeb pom kev zoo
illumination yog dab tsi?
Qhov teeb meem luminous flux nyob rau hauv chav tsev cheeb tsam ntawm lub illuminated khoom yog lub illuminance.
Denoted los ntawm E. ln lux (lx = lm/m2)
Illuminance yog ywj siab ntawm cov kev taw qhia uas lub luminous flux tshwm sim ntawm qhov chaw
Feem ntau hauv tsev thiab sab nraum zoov illumination theem
Txawv txoj haujlwm nyob rau hauv lub hnub thaum tav su
Yuav ntsuas lub teeb li cas? Lawv ntsuas li cas?
1. Lub teeb qhov chaw
2. Opaquescreen
3. Photocell
4. Lub teeb rays (xws li ib zaug)
5. Lub teeb rays (rov qab ob zaug)
Luminous siv: kev taw qhia nrhiav photometer (raws li daim duab)
Illuminance: illuminometer (daim duab)
Brightness: luminance meter ( duab)
5.2, xim kub thiab xim rendering ntawm lub teeb qhov chaw
I. Xim Kub
Lub cev dub txheem yog rhuab (xws li lub tungsten filament nyob rau hauv ib lub teeb incandescent), thiab xim ntawm lub cev dub pib hloov maj mam raws li tsaus liab - lub teeb liab - txiv kab ntxwv - daj - dawb - xiav thaum kub nce. Thaum cov xim ntawm lub teeb tawm los ntawm lub teeb ci yog tib yam li cov xim ntawm tus qauv dub ntawm qhov kub thiab txias, peb hu rau qhov kub thiab txias ntawm lub cev dub thaum lub sijhawm xim kub ntawm lub teeb ci.
Qhov kub K yog qhia. Xim xim
Raws li qhia hauv lub rooj:
Xim kub common sense:
| Xim kub | photochron | Atmosphere nyhuv | Tricolor fluorescence |
| Ntau tshaj 5000k | Txias xiav xiav | Qhov kev xav txias | Mercury teeb |
| 3300-5000k ib | Nruab nrab ze rau lub teeb ntuj | Tsis pom kev pom kev puas siab puas ntsws | Xim fluorescence nyob mus ib txhis |
| 3300k tsawg dua | Sov dawb nrog paj txiv kab ntxwv | Kev sov siab | Incandescent teeb quartz halogen |
Xim rendering
Lub degree ntawm lub teeb ci rau cov xim ntawm cov khoom nws tus kheej yog hu ua xim rendering, uas yog, lub degree ntawm cov xim lifelike, lub teeb qhov chaw nrog high xim rendering yog zoo dua rau cov xim, xim peb pom yog ze rau lub ntuj xim, Lub teeb pom kev zoo nrog cov xim rendering tsis zoo yog qhov tsis zoo ntawm cov xim luam tawm, thiab xim sib txawv ntawm peb pom kuj loj, sawv cev los ntawm cov xim rendering Performance index (Ra).
Lub International Lighting Committee CIE teeb tsa cov xim ntsuas ntawm lub hnub ntawm 100. cov xim Performance index ntawm txhua yam teeb pom kev zoo tib yam.
Piv txwv li, xim Performance index ntawm siab siab sodium teeb yog Ra = 23, thiab xim Performance index ntawm fluorescent teeb yog Ra = 60-90. Qhov ze ntawm cov xim ntsuas yog rau 100, qhov zoo dua qhov xim rendering yog.
Raws li qhia hauv qab no: cov teebmeem ntawm cov khoom nrog cov xim sib txawv:
Xim rendering thiab illumination
Cov xim rendering Performance index ntawm lub teeb ci ua ke nrog lub illuminance txiav txim siab qhov pom kev pom tseeb ntawm ib puag ncig. Cov kev tshawb fawb tau pom tias muaj qhov sib npaug ntawm lub teeb pom kev zoo thiab cov xim rendering Performance index: teeb pom kev hauv chaw ua haujlwm nrog lub teeb nrog cov xim rendering Performance index Ra> 90 zoo dua li teeb pom kev hauv chaw ua haujlwm nrog lub teeb nrog lub teeb xim qis (Ra <60) hauv cov ntsiab lus ntawm kev txaus siab rau nws cov tsos.
Tus nqi kawm ntawv tuaj yeem txo qis dua 25%.
Lub teeb pom kev zoo nrog qhov zoo tshaj plaws xim rendering Performance index thiab high luminous efficiency yuav tsum tau xaiv ntau npaum li sai tau, thiab qhov tsim nyog illumination yuav tsum tau siv kom tau zoo lub zeem muag nrog tsawg kawg nkaus tus nqi zog.
Cov nyhuv tshwm sim.
Piv txwv li lub wonled LED Rechargeable rooj teeb
Lub teeb pom kev zoo no tau nruab nrog USB Type-C thev naus laus zis los muab kev sib txuas thiab kev them nyiaj sai. Ib qho ntawm cov yam ntxwv tseem ceeb ntawm lub teeb no yog nws lub zog 3600mAh roj teeb, ua kom lub teeb pom kev ntev. Nrog lub sijhawm ua haujlwm ntawm 8-16 teev, koj tuaj yeem tso siab rau lub teeb no kom nrog koj mus ib hnub thiab hmo ntuj. Thiab ua tsaug rau qhov kov hloov, kho qhov ci kom haum raws li koj nyiam yog qhov yooj yim li los so ntawm koj tus ntiv tes.Dab tsi teeb peb LEDrechargeable rooj teebSib nrug yog nws txoj haujlwm IP44 waterproof. Lub sij hawm them nyiaj yog qhov yooj yim, siv sijhawm li 4-6 teev kom them tag nrho. Siv qhov yooj yim ntawm USB hom-C, koj tuaj yeem yooj yim them lub teeb no nrog ntau yam khoom siv, ua kom muaj kev siv ntau yam thiab siv tsis muaj teeb meem. Nrog rau kev tawm tswv yim ntawm 110-200V thiab cov zis ntawm 5V 1A, lub teeb no yog ob qho tib si zoo thiab txhim khu kev qha.
| Khoom npe: | tsev noj mov rooj teeb |
| Khoom siv: | Hlau + Aluminium |
| Kev siv: | cordless rechargeable |
| Lub teeb qhov chaw: | 3W |
| Hloov: | Dimmable kov |
| Roj teeb: | 3600MAH (2 * 1800 hli) |
| Xim: | Dub, Dawb |
| Style: | niaj hnub |
| Lub sijhawm ua haujlwm: | 8-16 teev |
| Waterproof: | IP44 |
Nta:
Lub teeb loj: 100 * 380MM
Roj teeb: 3600mAh
2700k3 wb
IP44
Lub sijhawm them nyiaj: 4-6 teev
Lub sijhawm ua haujlwm: 8-16 teev
Hloov: kov hloov
lnput 110-200V thiab tso zis 5V 1A
