Nkag siab LED Xim Hloov: Ua rau thiab Tiv Thaiv
LED thev naus laus zis tau hloov kho lub teeb pom kev zoo nrog nws qhov tshwj xeeb ua haujlwm thiab ua haujlwm ntev. Txawm li cas los xij, zoo li txhua qhov chaw teeb pom kev zoo, LEDs tau hloov pauv hloov pauv hauv kev ua haujlwm dhau sijhawm. Ib qho kev hloov pauv tseem ceeb uas feem ntau mus tsis pom txog thaum nws dhau los ua teeb meem yog "xim hloov" - qhov tshwm sim uas cov xim ntawm LED teeb pom kev maj mam hloov mus thoob plaws hauv nws lub neej ua haujlwm.
Txhais cov ntsiab lus tseem ceeb
Xim Stability vs. Xim Consistency
Nws yog ib qho tseem ceeb kom paub qhov txawv ntawm ob feem ntau -cov ntsiab lus tsis meej pem:
Xim Stability: Ib yam khoom muaj peev xwm tswj tau cov xim zoo ib yam li lub sijhawm
Xim tsis sib xws: Qhov sib txawv ntawm cov yam ntxwv xim ntawm cov khoom sib txawv los ntawm tib qho kev tsim khoom
Thaum tham txog kev hloov xim, peb feem ntau txhawj xeeb txog xim ruaj khov - zoo npaum li cas lub teeb pom kev zoo tswj nws cov xim qub hauv nws lub neej.
Color Shift yog dab tsi?
Kev hloov xim sawv cev rau qhov ntsuas qhov hloov pauv hauv lub teeb pom kev zoo ntawm cov zis, ua rau muaj kev hloov pauv rau ob qho tib si Correlated Color Temperature (CCT) thiab Xim Rendering Index (CRI). Qhov no tshwm sim manifests raws li ib tug gradual transformation nyob rau hauv lub perceived xim ntawm emitted lub teeb.
Ib qho piv txwv zoo tuaj yeem pom nyob rau hauv qhov chaw nres tsheb teeb pom kev zoo, qhov twg ntau tus ncej siv 5000K qhov sib xyaw ua ke nws thiaj li pom cov xim sib txawv vim qhov sib txawv ntawm cov xim hloov ntawm cov fixtures.
Kev ntsuas xim raug: MacAdam Ellipse System
Kev lag luam teeb pom kev zoo siv MacAdam Ellipses los txheeb xyuas cov xim sib txawv. Qhov system no txhais cov cheeb tsam elliptical ntawm daim duab chromaticity uas muaj cov xim indistinguishable rau nruab nrab tib neeg qhov muag. Qhov ntsuas qhov sib txawv ntawm 1 mus rau 10 cov kauj ruam, nrog tsawg dua cov kauj ruam qhia pom cov xim zoo sib xws:
1-3 Kauj ruam: Daim ntawv thov hwm (tsev cia puav pheej, qhov chaw, chaw kho mob)
3-4 Kauj ruam: Daim ntawv thov kev lag luam (chaw ua haujlwm, chaw muag khoom, tsev kawm ntawv)
4-6 Kauj ruam: Txuj kev siv sab nraum zoov thiab kev lag luam
LED cov tuam txhab siv cov txheej txheem no thaum "binning" - cov txheej txheem ntawm kev txheeb cov LEDs rau hauv pawg uas muaj xim zoo sib xws. Cov khoom siv LEDs los ntawm kev sib tw nruj dua (tsawg dua MacAdam cov kauj ruam) ua kom pom cov xim zoo sib xws.
Yam Tseem Ceeb ntawm LED Xim Hloov
Muaj ntau yam ua rau muaj kev hloov xim ntxov ntxov hauv cov khoom LED:
1. Cov khoom zoo thiab cov khoom xaiv
Tsawg-zoo LED diodes los ntawm qhov dav dav binning ntau degrade sai dua
Substandard phosphor coatings raug rau thermal degradation
Cov tsav tsheb tsis txaus thiab cov khoom siv fais fab uas ua rau muaj hluav taws xob tsis ruaj khov
2. Cov teeb meem tswj kev kub ntxhov
Tsis txaus cua sov dab dej ua rau siab ua haujlwm kub
"Hnub-tsav" diodes kom ua tiav cov zis ntau dua lumen, ua kom muaj cua sov ntau
Tsis zoo thermal txoj kev tsim tiv thaiv kom zoo cua sov dissipation
Plua plav thiab cov pa paug paug impairing thermal kev ua haujlwm
3. Tsim thiab tsim khoom tsis zoo
Cov khoom siv kho qhov muag tsis pom zoo uas degrade nyob rau hauv qhov raug UV
Phosphor txheej delamination vim thermal cycling
Kev tiv thaiv tsis txaus tiv thaiv ib puag ncig
Kev tsim khoom tsis sib xws hauv cov txheej txheem thov phosphor
4. Daim ntawv thov thiab kev teeb tsa
Siv LED hloov hauv cov khoom siv tsim los rau cov teeb pom kev zoo ib txwm muaj
Ua haujlwm hauv ib puag ncig tshaj qhov ntsuas kub tau pom zoo
Kev teeb tsa tsis raug cuam tshuam tsim kev tswj xyuas thermal
Lub luag haujlwm tseem ceeb ntawm Thermal Management
Thaum tshav kub kub yog qhov tseem ceeb tshaj plaws uas cuam tshuam rau LED xim stability. Tsis zoo li cov teeb pom kev zoo ib txwm muaj, LED kev ua tau zoo yog cuam tshuam nrog kev ua haujlwm kub. Cov cua kub ntau dhau ua rau phosphor degradation, uas ua rau:
Blue Shift: Phosphor curling deb ntawm LED nti
Yellow Shift: Phosphor delamination tsim cov pa tawm
Zuag qhia tag nrho Lumen Depreciation: Txo lub teeb tso zis efficiency
Ua kom ntev -Lub Sij Hawm Xim Stability
Txhawm rau txo cov teeb meem hloov xim:
Rau Manufacturers:
Ua raws li kev cai nruj nruj (nyiam dua tsawg dua lossis sib npaug rau 3 MacAdam cov kauj ruam)
Tsim cov txheej txheem thermal tswj zoo
Siv cov khoom zoo -phosphors thiab encapsulation
Ua kom ceev lub neej sim nrog rau cov xim stability metrics
Rau Specifiers thiab cov neeg siv:
Xaiv cov khoom los ntawm cov tuam txhab muab cov ntaub ntawv hloov xim
Txheeb xyuas cov ntsiab lus lav tshwj xeeb uas nyob ntawm xim ruaj khov
Xyuas kom muaj kev txhim kho kom zoo tswj kev tsim thermal ua haujlwm
Xav txog cov kev xav tau ntawm daim ntawv thov thaum xaiv cov xim sib xws
Kev lag luam Standards thiab yav tom ntej Directions
Kev lag luam teeb pom kev zoo txuas ntxiv txhim kho cov kev ntsuas zoo dua rau kev ntsuas xim hloov, suav nrog:
TM-30-18 rau kev ntsuam xyuas xim ntau dua
Txuas ntxiv cov txheej txheem ntsuas ntsuas ntev - lub sij hawm xim stability
Txhim kho warranty cov ntsiab lus tshwj xeeb hais txog kev saib xyuas xim
Xaus
Thaum tag nrho cov LEDs muaj qee qhov kev hloov xim ntawm lub sijhawm, tus nqi thiab qhov kev hloov pauv no feem ntau nyob ntawm cov khoom zoo thiab tsim. Kev nkag siab txog qhov ua rau thiab kev tiv thaiv txoj hauv kev ua rau cov neeg ua haujlwm tshwj xeeb xaiv cov khoom lag luam uas yuav tswj hwm lawv cov xim xim thoob plaws hauv lawv txoj sia. Raws li LED thev naus laus zis loj hlob tuaj, xim ruaj khov tau dhau los ua qhov sib txawv tseem ceeb ntawm cov khoom lag luam zoo thiab lawv cov khoom sib xws, thaum kawg txiav txim siab qhov tseeb tus nqi thiab kev ua tau zoo ntawm kev teeb pom kev zoo nyob rau lub sijhawm.
