CoB LEDs yog dab tsi?
Lub CoB LED, tseem hu ua chip-on-board LED, yog ib feem ua los ntawm ob peb LED chips ntsia rau ntawm ib tug thermally npaum substrate uas yog them nrog ib tug homogeneous txheej ntawm phosphor.
Ib lub chip-on-board LED (CoB) feem ntau yog siv los muab illumination rau recessed los yog taug qab teeb pom kev zoo nyob rau hauv ib lub tsev los yog qhov chaw nyob. Vim tias lawv tsim lub teeb dawb ci ntsa iab los ntawm lub teeb me me thiab muaj txiaj ntsig zoo hauv ntau yam kev siv, CoBs nquag ua haujlwm.
CoB LED sib txawv ntawm lwm hom LEDs li cas?
Lub sij hawm "CoB" (chip-on-board) piav qhia txog yuav ua li cas LED chav tsev muab tso ua ke. Dawb CoB LEDs 'cov khoom tseem ceeb yog:
lub zog siv hluav taws xob siv hluav taws xob los ua hluav taws xob LED
lub 'tuag', los yog lub teeb-emitting nti. Qhov no tseem hu ua "lub teeb xiav lub twj tso kua mis" thiab yog tsim los ntawm cov khoom siv semiconductor indium gallium nitride (InGaN), uas thaum ua haujlwm tso tawm xiav photons. Lub teeb xiav ces hloov mus ua dawb los ntawm phosphor txheej. Kev tswj cov phosphor tshuaj pleev ua rau lub teeb nrog cov xim kub uas tau teev tseg.
Chaw-Txuag Array ntawm ob peb LED Chips: CoB LED
Lub CoB LED yog ib chav tsev uas muaj ob peb LED chips muab tso rau ntawm lub rooj tsavxwm thermal. Txhua nti yog liab qab, txhais tau tias nws tsis muaj leadframe, phosphor txheej, los yog lens ntawm nws tus kheej. Yog li ntawd, cov chips yuav muab tso rau ntawm lub substrate nruj heev ua ke. Thaum muab piv rau ib lub pob LEDs, qhov sib thooj ntawm LED chips ua rau muaj kev siv zog ntau dua los yog lub teeb ntom ntom kom tawm los ntawm thaj chaw me me. Ua tiav array ntawm chips hauv CoB LED chaw tsim tshuaj paus lub nti array yog ces uniformly coated nrog phosphor hloov lub teeb xiav rau hauv qhov tsim nyog xim kub.
Cov txiaj ntsig ntawm CoB LED
Ib tug CoB LED yuav muaj ib tug tuab array ntawm pua pua ntawm chips nyob rau hauv nws. Nyob rau hauv kev sib piv rau ib tug array ntawm packed LEDs, ib tug CoB LED yuav emit ntau lub teeb los ntawm ib tug me me qhov chaw vim hais tias rau nws ntom array.
Ib qho LED tuaj yeem muab cov txiaj ntsig kho qhov muag rau homogeneous lub teeb thiab zoo optics, nrog rau kev tsim qauv yooj yim thiab cov khoom lag luam.
Lub CoB LED tsuas yog xav tau ib qho hluav taws xob ob-xaim los ua kom lub zog tag nrho ntawm cov chips, ua kom yooj yim hluav taws xob architecture. Daim duab ntawm LUXEON CoB Core Range cov khoom lag luam saum toj no qhia meej txog qhov zoo thiab qhov tsis zoo ntawm lub CoB LED. Ib qho array ntawm ntim cov LEDs, ntawm qhov tod tes, xav tau cov khoom siv hluav taws xob tshwj xeeb xa mus rau PCB rau txhua chav LED.
Yog tias CoB LED siv los hloov ib pawg ntawm cov ntim LEDs, ntau lawm yuav yooj yim dua vim tias tsawg dua cov chav yuav tsum tau soldered rau lub rooj tsavxwm.
Optically, CoBs ntawm ntau qhov ntau thiab tsawg yuav siv tau nrog ntau yam ntawm optics, feem ntau reflectors, tswj kev taw qhia thiab dav ntawm kab teeb, xws li nrog rau qhov chaw lossis dej nyab teeb.
Thaum kawg, CoB LED cov xim yuav ua tau ntau dua vim tias tsuas yog ib qho phosphor txheej yog siv rau tag nrho cov array ntawm chips, as opposed to one phosphor coating for each LED unit in a packaged LED array.
