4 Cov Ntsiab Lus Qhia ntawm High-power LED Ua Haujlwm Kub Tswjhwm

Daim ntawv thov ntawm high-power LED teeb pom kev zoo khoom yog ua dav thiab dav, thiab lub luminous brightness ntawm high-power LED yog proportional rau nws tam sim no, thiab rau pem hauv ntej tam sim no ntawm high-power LED kuj yuav hloov nrog kub hloov. Hnub no, kuv yuav coj txhua tus los kawm txog vim li cas rau LED pob qhov kub thiab LED semiconductor teeb pom kev zoo qhov chaw tshav kub dissipation txoj kev. Nyob rau hauv xyoo tsis ntev los no ntawm txoj kev loj hlob, LED teeb pom kev zoo tau ua ntau dua thiab siab dua, tus nqi tau txais tsawg thiab tsawg, thiab xim tau dhau los ua nplua nuj thiab nplua nuj. Qhov no ua rau lub zog siab LEDs ua kom muaj txiaj ntsig zoo, txuag hluav taws xob, ib puag ncig tus phooj ywg, thiab muaj kev nyab xeeb tu qhov chaw nyob ze yav tom ntej. Txawm li cas los xij, qhov teeb meem ntawm kev kub ntxhov ntawm high-power LED teeb tseem yog ib qho kev txhim kho loj hauv nws daim ntawv thov hauv thaj chaw teeb pom kev zoo. Nws yog ib qho tseem ceeb uas yuav txwv tsis pub nws cov tiam tshiab ntawm cov teeb pom kev zoo. Cov ntaub ntawv tshawb fawb qhia tau hais tias thaum lub teeb ci LED muaj lub teeb ci ntsa iab thaum lub pob taws kub ntawm LED nti yog 25 C, tom qab ntawd thaum lub pob kub kub nce mus txog 60 C, nws cov luminous npaum li cas tsuas yog 90%; Thaum lub pob kub kub nce mus txog 100 C, nws yuav poob mus rau 80%. ; 140 C yog 70%. Nws tuaj yeem pom tias kev txhim kho cov cua sov dissipation tswj qhov kub thiab txias yog qhov tseem ceeb heev rau kev txhim kho nws cov luminous efficiency. Yog hais tias qhov teeb meem kub dissipation ntawm high-power LED teeb tsis daws teeb meem, kev ua hauj lwm kub ntawm LED teeb yuav nce thiab cov pob caus kub yuav nce, uas yuav ua rau lub LED chroma offset, xim rendering Performance index txo, xim kub nce. , lub teeb emitting efficiency txo, thiab lub neej kev pab cuam yuav luv luv. Lub luminous brightness ntawm high-power LED yog proportional rau nws tam sim no. Yog hais tias cov zis optical flux ntawm high-power LED yog tswj, nws yog sib npaug rau tswj nws luminous brightness. Qhov zoo tam sim no ntawm high-power LEDs kuj yuav hloov nrog qhov kub thiab txias. Thaum qhov kub thiab txias ntawm ib puag ncig tshaj ib qho nqi (peb hu rau kev nyab xeeb kub), qhov tam sim no ntawm LED yuav raug txo dheev. Lub sijhawm no, yog tias qhov tam sim no tseem nce ntxiv, nws yuav ua rau LED lub neej txo qis. Yog li ntawd, nyob rau lub sijhawm no, cov kev ntsuas sib thooj yuav tsum tau ua. Thaum lub teeb npuas hluav taws xob tam sim no thiab qhov ntsuas kub ib puag ncig hloov pauv, lub zog siab-power LED zoo tam sim no tuaj yeem tswj tau raws sijhawm. Siv cov cuab yeej siv hluav taws xob kub los kho cov zis tam sim no raws li qhov ntsuas kub, thiab saib xyuas qhov kub thiab txias ntawm LED hauv lub sijhawm tiag tiag, kom lub siab-power LED ntawm qhov kub thiab txias yuav cia li txo nws qhov tam sim no. 1. Cov xwm txheej tam sim no ntawm high-power LED teeb pom kev zoo cov khoom "chip-aluminium substrate-cov txheej txheem peb txheej ntawm lub radiator" yog siv los ntawm feem ntau lub zog loj LED teeb pom kev zoo ntawm lub khw tam sim no, uas yog, thawj ntim nti ntawm txhuas substrates. los tsim ib lub teeb ci LED module, thiab tom qab ntawd ces nruab lub teeb qhov chaw module ntawm lub radiator kom koj tuaj yeem ua kom muaj zog LED teeb pom kev zoo. Tam sim no, kev siv cov LEDs thaum ntxov los qhia cov teeb pom kev zoo thiab cov cim qhia tau siv los ua kev tswj hwm thermal rau cov khoom siv hluav taws xob siab. Hom kev tswj thermal no tsuas yog siv rau me me-power LED siv. Lub high-power LED teeb pom kev zoo npaj los ntawm peb-txheej txheej qauv hom, tseem muaj ntau qhov chaw tsis tsim nyog nyob rau hauv cov nqe lus ntawm cov qauv system, xws li kub pob caus, tsis tshua muaj cua sov dissipation efficiency, ntau hu rau thermal kuj ntawm cov qauv, txo tshav kub dissipation efficiency, Kev sib cuag ntau dua thermal kuj yog li ntawd, cov cua sov tso tawm los ntawm cov nti tsis tuaj yeem cuam tshuam zoo thiab xa tawm, ua rau LED teeb pom kev zoo, tsis muaj teeb pom kev zoo, thiab lub neej luv. Vim muaj kev txwv ntawm ntau yam xws li cov qauv, nqi, thiab kev siv hluav taws xob, lub zog hluav taws xob LED teeb pom kev zoo yog qhov nyuaj rau kev siv lub tshuab ua kom sov dissipation, thiab tuaj yeem siv lub tshuab hluav taws xob tsis zoo, tab sis kev siv hluav taws xob tsis zoo muaj kev txwv loj; thiab tam sim no lub zog hloov dua siab tshiab ntawm LEDs tseem ua tau zoo Tsis siab, li ntawm 70% ntawm cov khoom siv hluav taws xob tuaj yeem hloov mus rau hauv tshav kub, txawm tias lub teeb pom kev zoo nce 40%, lub zog hloov mus rau hauv tshav kub, uas yog, nws yog. nyuaj kom nce qib ntawm cov cua sov dissipation yam tsis xav txog qhov kub dissipation. 2. Cov yam ntxwv ntawm cov teeb pom kev zoo ntawm LED teeb pom kev sib txawv ntawm cov teeb pom kev zoo ib txwm muaj, cov teeb ci incandescent, thiab cov teeb halogen. LED semiconductor teeb pom kev zoo qhov chaw yog tsim los ntawm cov khoom siv semiconductor thiab muaj PN. Electronics-grounded acupoints tsim lub teeb pom kev los ntawm kev sib xyaw, PN zoo kev taw qhia Tong, thim rov qab txiav tawm, ntawm qhov chaw N sib raug rau qhov tsis zoo electrode, thiab P cheeb tsam sib raug rau tus ncej zoo. LED semiconductor teeb qhov chaw muaj qhov zoo ntawm lub teeb pom kev zoo, lub sijhawm teb luv luv, ntim me me, txuag hluav taws xob thiab lwm yam zoo. Tsis tas li ntawd, nws kuj muaj cov yam ntxwv ntawm cov teeb pom kev zoo ib txwm muaj: 2.1 muaj cov yam ntxwv ntawm cov khoom siv zoo sib xws PN semiconductor: 1) Qhov zoo tam sim no thiab rau pem hauv ntej yog qhov tsis zoo ntawm qhov kub thiab txias coefficients, uas txo qis thaum kub nce; 2) Qhov zoo voltage voltage Nws yuav tsum tshaj ib qho kev pib ua kom muaj tam sim no; 3) Thaum thim rov qab, tsis muaj tam sim no yuav tsis ua haujlwm. 2.2 Muaj ntau ntau yam los txwv nws qhov kub thiab txias ua haujlwm. Cov lus qhia tshwj xeeb yog raws li hauv qab no: 1) Lub ci ci ntawm LED thiab qhov zoo tam sim no nthuav tawm qee qhov kev sib raug zoo nkhaus. Thaum lub pob caus kub siab tshaj ib qho nqi, qhov ci ntsa iab tsis muaj zog nrog qhov txo qis rau qhov tam sim no; 2) Koj yuav tsum txwv lub pob qhov kub kom qis dua tus nqi ntsuas 95 C txog 125 C; 3) Yog hais tias qhov saum npoo muaj cov lo ntsiab muag yas, nws yuav raug txwv los ntawm qhov kub thiab txias ntawm cov khoom siv lens. 3. Kev taw qhia txog LED pob qhov kub thiab txias 3.1 Qhov ua rau LED kub taub hau tsim los ntawm LED kub taub hau yog vim lub zog ntxiv tsis yog tag nrho cov hloov pauv ntawm lub teeb lub zog, thiab qee qhov ntawm lawv tau hloov mus rau hauv thermal zog. Tam sim no, lub teeb efficiency ntawm LED nyob rau hauv lub lag luam yog hais txog 100 LM / W. Hauv lwm lo lus, kwv yees li 70% ntawm lub zog hluav taws xob yog nkim nyob rau hauv daim ntawv ntawm thermal zog. Feem ntau hais lus, muaj ob yam uas ua rau kev tsim ntawm LED pob qhov kub. Tshwj xeeb raws li hauv qab no: 1) Internal quantum efficiency. Thaum cov acupuncture thiab hluav taws xob sib xyaw ua ke, lawv tsis tuaj yeem tsim cov photons. Qhov no feem ntau hu ua "tam sim no to", uas yog vim li cas vim li cas qhov sib xyaw ntawm kev thauj khoom ntawm PN cheeb tsam raug txo. Qhov hluav taws xob ntawm cov hluav taws xob xau thiab qhov tam sim no yog lub zog tawg ntawm qhov no, uas yog, kev hloov pauv mus rau hauv thermal zog, tab sis qhov no tsis yog lub ntsiab lus tseem ceeb, vim tias cov cuab yeej siv tam sim no tuaj yeem ua rau cov photon efficiency ntawm LED ze li 90. %. 2) Txog 30% ntawm cov khoom siv hluav taws xob sab nraud. Ib qho ntawm cov laj thawj tseem ceeb yog tias cov photons tsim los ntawm cov loadmons tsis tuaj yeem hloov mus rau sab nraud ntawm cov nti tab sis hloov mus rau hauv tshav kub. Txawm hais tias incandescent teeb tsuas yog kwv yees li 15LM / W, tab sis thaum kawg, nws radiates hluav taws xob hluav taws xob nyob rau hauv daim ntawv ntawm lub teeb lub zog. Txawm hais tias feem ntau ntawm cov hluav taws xob hluav taws xob yog infrared thiab lub teeb pom kev zoo tsawg heev, qhov no raug zam los ntawm qhov teeb meem ntawm cov cua sov dissipation. Qhov teeb meem kub dissipation ntawm LED tau maj mam dhau los ua qhov tseem ceeb ntawm tib neeg kev mloog. Qhov no yog vim hais tias lub neej ntawm LED los yog lub teeb lwj yog ncaj qha ntsig txog nws qhov kub thiab txias. Yog hais tias qhov kub dissipation teeb meem tsis daws tau zoo. 3.2 Txoj hauv kev los txo qhov kub ntawm LED pob caus Tswj lub ntsuas hluav taws xob nkag; Kev tsim qauv ntawm cov txheej txheem cua sov thib ob; txo qhov kub tsis kam ntawm qhov nruab nrab kub dissipation qauv thiab LED installation interface kom tsawg; txo qhov kub ntawm ib puag ncig; txo LED nws tus kheej thermal kuj. 4. LED semiconductor teeb pom kev zoo lub teeb qhov chaw tshav kub dissipation txoj kev Feem ntau, lub radiator yuav muab faib ua passive heat dissipation thiab active tshav kub dissipation raws li txoj kev kom tshem tawm cov cua sov. Qhov thiaj li hu ua passive heat dissipation yog hais txog cov cua sov uas tsim los ntawm qhov chaw tshav kub ntawm LED teeb qhov chaw rau huab cua los ntawm lub dab dej kub. Nws cov nyhuv thermal dissipation yog proportional rau qhov loj ntawm cov ntsiav tshuaj thaum tshav kub kub dissipation, tab sis qhov kub dissipation nyhuv no kuj tsis txaus siab. Nyob rau hauv cov cuab yeej, los yog rau lub tshav kub dissipation ntawm tsawg-power thiab tsawg-kub, feem ntau ntawm cov khoom siv active tshav kub dissipation, active tshav kub dissipation yog mus active coj lub tshav kub los ntawm lub dab dej kub los ntawm ib co khoom. Higher heat dissipation efficiency yog lub ntsiab feature ntawm active tshav kub dissipation thiab nws muaj ib tug kuj me me ntim. Lwm txoj hauv kev yog ua cov khoom siv LED los ntawm kev siv lub "ntu" electrode. Vim tias muaj cov hlau electrodes nyob rau sab sauv thiab qis kawg ntawm LED Cheebtsam, qhov no tuaj yeem tau txais kev pab ntau dua ntawm qhov teeb meem ntawm cov cua sov dissipation. Piv txwv li, GAN substrate yog siv los ua cov khoom siv. Vim tias GAN substrate yog cov khoom siv hluav taws xob, cov khoom siv hluav taws xob tuaj yeem txuas ncaj qha rau hauv qab substrate kom tau txais txiaj ntsig ntawm kev tawg sai thiab lub teeb, tab sis vim tias cov khoom siv siab heev, txoj hauv kev no kuj tseem yuav kim dua li cov nqi ntawm cov tsoos. sapphire substrates, uas yuav ua rau kom tus nqi tsim khoom ntawm cov khoom.