Taw qhia txog kev siv hluav taws xob dissipation rau high-power LED teeb pom kev zoo khoom
LED teeb pom kev zoo daim ntawv thov tiam sis thiab cov teeb meem kub dissipation Vim muaj kev nce qib ntawm Cov Khoom Siv Hluav Taws Xob Hluav Taws Xob Hluav Taws Xob, cov luminous efficiency ntawm LEDs tau txhim kho nyob rau hauv xyoo tas los no, thiab tuaj yeem hloov pauv cov teeb pom kev zoo. Tam sim no, lub luminous efficiency tau dhau lub teeb incandescent thiab halogen teeb thiab txuas ntxiv nce mus.
Thiab qee lub tuam txhab tau tsim cov khoom siv LED nrog kev ua haujlwm siab tshaj 100lm / W, uas tseem ua rau cov teeb pom kev zoo ntawm LED ntau thiab siv ntau dua, tsis yog tsuas yog siv hauv tsev thiab sab nraum zoov teeb pom kev zoo, lub xov tooj ntawm tes backlight modules thiab tsheb coj teeb, thiab lwm yam., zoo siab dua Nws yog siv nyob rau hauv high-wattage projection teeb thiab txoj kev teeb thiab lwm yam muaj zog teeb pom kev zoo, loj-loj backlight modules, thiab automotive headlights. Vim qhov zoo ntawm kev txuag hluav taws xob, kev tiv thaiv ib puag ncig thiab lub neej ntev, qhov sib txawv ntawm LED teeb qhov chaw raws li lub ntsiab lus tseem ceeb yav tom ntej yuav ua kom pom tseeb dua.
Txhawm rau ua kom cov LEDs tawm lub teeb ci dua, nws yog ib qho tsim nyog yuav tsum muaj lub zog ntau dua. Txawm li cas los xij, qhov kev hloov pauv photoelectric efficiency ntawm high-power LEDs tseem txwv. Feem ntau, tsuas yog li ntawm 15 ~ 25% ntawm lub zog nkag los ua lub teeb, thiab tus so yog hloov mus rau hauv lub zog cua sov. . Vim yog thaj tsam me me ntawm LED nti, qhov hluav taws xob tsim hluav taws xob hauv ib cheeb tsam (qhov kub ceev) ntawm lub zog hluav taws xob LED yog siab heev, txawm tias hnyav dua li IC feem ntau, thiab qhov kub ntawm qhov sib txuas ntawm LED nti tau nce siab heev. , uas yog ib qho yooj yim ua rau overheating teeb meem. . Qhov kub ntawm wafer hlws ris ntau dhau yuav txo qhov luminous brightness ntawm LED, uas cov attenuation ntawm lub teeb liab yog qhov pom tseeb tshaj plaws. Nws kuj tseem yuav ua rau lub wavelength hloov ntawm LED cuam tshuam rau cov xim rendering, thiab tseem yuav ua rau txo qis kev ntseeg siab ntawm LED. Yog li ntawd, cov thev naus laus zis thev naus laus zis tau dhau los ua lub hauv paus ntawm kev txhim kho LED technology tam sim no.
Yog li ntawd, kev sib tw ntawm cov cua kub dissipation tsim yog qhov zoo. Nws yog ib qho tsim nyog los txuas qhov tseem ceeb rau kev tsim hluav taws xob hluav taws xob los ntawm qib nti, qib pob, qib PCB mus rau qib system module, thiab nrhiav qhov zoo tshaj plaws thermal dissipation tov. Rau cov khoom siv teeb pom kev zoo ntawm LED, cov kev xav tau ntawm cov cua sov ntawm lwm theem yog qhov pom tseeb dua vim qhov kev txwv loj ntawm cov cua kub dissipation ntawm sab system.
Rau qhov teeb meem ntawm kev hloov hluav taws xob LED, txoj kev tsom xam yooj yim tshaj plaws yog siv cov thermal resistance network rau kev tsom xam. Ntawd yog, lub thermal resistance network yog tsim los ntawm lub ntsiab tshav kub dissipation txoj kev ntawm LED los ntawm lub nti kub qhov chaw mus rau lub ambient kub, thiab ces cov yam ntxwv thiab loj ntawm txhua thermal resistance nqi yog soj ntsuam. Countermeasures kom txo tus nqi thermal kuj. Nws yuav tsum tau muab sau tseg tias nyob rau hauv tiag tiag kev tsom xam, ib tug ntau ncauj lus kom ntxaws thermal resistance network yuav tsum tau tsim raws li lub system qauv, piv txwv li, xav txog cov thermal kuj ntawm cov ntaub ntawv interface xws li Die Attach khoom thiab Solder, los yog cov thermal kuj nqi ntawm lub tshav kub. dissipation module qauv.
Vim qhov tsis zoo thermal conductivity ntawm Sapphire substrate ntawm LED nti, tus nqi thermal kuj yuav siab dhau. Yog li ntawd, txoj kev txhim kho yuav tsum tau hloov cov Sapphire nrog cov khoom siv thermal conductivity xws li tooj liab, los yog siv cov txheej txheem flip nti kom tshem tawm cov substrate los ntawm kev hloov tshav kub kom txo tau cov thermal kuj. tus nqi. Tam sim no, lub tshav kub dissipation tsim nrog kev ua tau zoo dua los ntawm cov nti mus rau qib pob, suav nrog kev tsim cov txheej txheem ntawm cov khoom siv sib xyaw thiab cov ntawv flip nti, ua rau cov cua kub hloov ntawm cov nti mus rau lub pob yooj yim dua. Nws kuj yog ib qho kev taw qhia ua tau kom nce qhov loj ntawm wafer kom txo tau cov cua sov tsim ceev.
Lub tshav kub dissipation tsim ntawm high-power LEDs yog ib qho tseem ceeb heev, uas muaj feem xyuam rau qhov zoo thiab kev pab lub neej ntawm LEDs. Los ntawm cov thermal resistance network, koj tuaj yeem soj ntsuam sai sai ntawm cov cua kub dissipation peev xwm thiab cov kev xav tau thiab nrhiav kev ntsuas kub dissipation countermeasures. Vim yog lub zog hluav taws xob siab ntawm high-power LEDs, nws yog ib qho tsim nyog yuav tsum tau ua cov cua kub dissipation tsim los ntawm Chip Level, Package Level, Board Level mus rau System Level kom txo tau cov thermal resistance. Tau qhov ua kom txias zoo tshaj plaws. Tam sim no, LED nti loj thiab ntim cov tuam txhab lag luam hauv ntiaj teb tau cog lus los tsim cov khoom lag luam nrog kev ua haujlwm siab dua. Los ntawm kev txhim kho lub quantum efficiency ntawm lub teeb, lub photoelectric conversion efficiency yog txhim kho kom txo tau lub tshav kub tiam ntawm lub nti.
Txhawm rau ua kom txoj kev loj hlob thiab kev siv cov khoom siv LED sai dua, cov cuab yeej siv hluav taws xob cuam tshuam tseem yuav tsum tau tsim ib txhij. Vim muaj kev txhim kho tas mus li ntawm tib neeg' qhov kev thov rau lub neej zoo, ib yam li qhov kev thov rau cov khoom siv hluav taws xob ntawm IC tau ib txwm muaj, cov qauv tsim hluav taws xob yuav tseem nyob hauv txoj haujlwm tseem ceeb hauv cov khoom tsim ntawm ntau lub zog LEDs.
