LED teeb cua sov ua rau thiab kev daws teeb meem
Kuv yuav ua li cas yog tias lub teeb LED cua sov? LEDs ua kom sov. Ntau tus neeg xav tias LEDs yog lub teeb txias. Qhov no tsuas yog hais txog lub teeb-emitting txoj cai ntawm LEDs.
Yog vim li cas vim li cas LED qhov muag teev tau kub:
Yog vim li cas vim li cas LED qhov muag teev kub yog vim qhov ntxiv hluav taws xob tsis yog tag nrho hloov mus rau hauv lub teeb lub zog, tab sis ib feem ntawm nws tau hloov mus rau hauv lub zog hluav taws xob, thiab qhov kev hloov pauv ntawm electro-optical yog li ntawm 20 ~ 30 feem pua. Qhov ntawd yog hais tias, kwv yees li 70 feem pua ntawm cov hluav taws xob hluav taws xob tau hloov mus ua lub zog hluav taws xob.
Tshwj xeeb, tiam ntawm LED hlws ris kub yog tshwm sim los ntawm ob yam:
Internal quantum efficiency tsis siab, uas yog, thaum electrons thiab qhov recombined, photons tsis tau generated 100 feem pua, uas yog feem ntau hu ua "tam sim no to", uas txo cov recombination tus nqi ntawm cov cab kuj nyob rau hauv lub PN cheeb tsam. Cov xau tam sim no sib npaug los ntawm qhov hluav taws xob yog lub zog ntawm qhov no, uas tau hloov mus rau hauv lub zog hluav taws xob, tab sis qhov no tsis suav nrog lub ntsiab lus tseem ceeb, vim tias tam sim no cov khoom siv photon sab hauv yog ze rau 90 feem pua.
Cov photons generated sab hauv tsis tuaj yeem tawm mus rau sab nraud ntawm lub nti thiab tom qab ntawd hloov mus rau hauv tshav kub. Qhov no yog qhov tseem ceeb, vim hais tias tam sim no hu ua sab nraud quantum efficiency tsuas yog kwv yees li 30 feem pua, thiab feem ntau nws hloov mus rau hauv tshav kub.
Raws li tau hais los saum toj no, txawm hais tias qhov ua tau zoo ntawm cov teeb pom kev zoo ntawm lub teeb hluav taws xob tsawg heev, tsuas yog li 15lm / W, tab sis nws hloov yuav luag tag nrho cov hluav taws xob hluav taws xob rau hauv lub teeb lub zog thiab radiates nws tawm, vim hais tias feem ntau ntawm lub zog hluav taws xob yog infrared, yog li lub luminous. efficiency yog tsawg heev. , tab sis zam qhov teeb meem ntawm tshav kub dissipation.
Cov kev daws teeb meem txias rau LED qhov muag teev:
Kev daws cov cua kub dissipation ntawm LED qhov muag teev feem ntau pib los ntawm ob yam. Ua ntej thiab tom qab ntim khoom, nws tuaj yeem nkag siab tias qhov kub dissipation ntawm LED chips thiab kub dissipation ntawm LED qhov muag teev. Lub tshav kub dissipation ntawm LED nti yog feem ntau cuam tshuam nrog kev xaiv thiab txheej txheem ntawm substrate thiab Circuit Court, thiab tsab xov xwm no yuav tsis piav qhia rau lub sijhawm. Cov kab lus no feem ntau qhia txog cov cua kub dissipation ntawm LED qhov muag teev. Vim tias ib qho LED yuav ua rau hauv lub teeb, lub tshav kub uas tsim los ntawm LED nti yog ib txwm dissipated rau hauv huab cua los ntawm lub plhaub ntawm lub teeb. Leiyus Teeb pom kev zoo ntseeg hais tias yog tias cov cua sov dissipation tsis zoo, vim tias lub peev xwm ntawm cov khoom siv hluav taws xob ntawm LED nti me me heev, qhov sib xyaw ua kom sov me ntsis yuav ua rau qhov kub thiab txias ntawm cov nti. Yog tias nws ua haujlwm ntawm qhov kub siab ntev ntev, nws lub neej yuav nrawm heev. luv. Txawm li cas los xij, muaj ntau txoj hauv kev uas cov cua sov no tuaj yeem raug coj tawm ntawm lub nti mus rau sab nraud. Tshwj xeeb, cov cua sov uas tsim los ntawm LED nti tawm los ntawm nws cov hlau kub dab dej, thawj zaug dhau los ntawm cov solder mus rau PCB ntawm txhuas substrate, thiab tom qab ntawd dhau los ntawm thermal paste mus rau aluminium kub dab dej. Yog li ntawd, lub tshav kub dissipation ntawm LED tsev so engineering teeb yeej muaj ob qhov chaw: tshav kub conduction thiab tshav kub dissipation.
Txawm li cas los xij, lub tshav kub dissipation ntawm LED teeb vaj tsev yuav kuj muaj kev xaiv sib txawv nyob ntawm seb lub zog loj thiab qhov chaw siv. Feem ntau muaj cov txheej txheem cua txias hauv qab no:
Aluminium tshav kub dissipation fins: Qhov no yog cov txheej txheem kub dissipation tshaj plaws, siv aluminium heat dissipation fins ua ib feem ntawm lub tsev kom ua rau cov cua kub dissipation.
Thermally conductive yas plhaub: Sau lub plhaub yas nrog cov khoom siv thermally thaum lub sij hawm txhaj tshuaj molding kom cov thermal conductivity thiab kub dissipation muaj peev xwm ntawm lub plhaub yas.
Huab cua hydrodynamics cua sov dissipation: Cua hydrodynamics siv cov duab ntawm lub teeb vaj tsev los tsim cov cua convection, uas yog ib txoj kev pheej yig dua los txhim kho cov cua sov.
Sab hauv ntawm lub kiv cua lub teeb vaj tsev siv lub neej ntev thiab kev ua haujlwm siab ntawm cov kiv cua los txhim kho cov cua sov dissipation: tus nqi qis thiab cov nyhuv zoo. Txawm li cas los xij, nws muaj teeb meem ntau dua los hloov lub kiv cua, thiab nws tsis haum rau kev siv sab nraum zoov. Qhov kev tsim no kuj tsis tshua muaj.
Thaum tshav kub kub cov yeeb nkab kub dissipation tshuab: Cov yeeb nkab cua sov siv cov yeeb nkab hluav taws xob los ua cov cua sov los ntawm LED nti mus rau lub plhaub kub dissipation fins. Qhov no yog ib qho qauv tsim hauv cov teeb loj xws li cov teeb pom kev.
Deg hluav taws xob hluav taws xob kub dissipation kev kho mob Qhov saum npoo ntawm lub teeb vaj tsev yog kho nrog hluav taws xob hluav taws xob dissipation: tsuas yog siv hluav taws xob hluav taws xob hluav taws xob dissipation xim, uas tuaj yeem tawm hluav taws xob tawm ntawm qhov chaw ntawm lub teeb vaj tsev.
