Piv nrog rau lwm cov teeb pom kev zoo tib yam, qhov zoo tshaj plaws ntawm LED vaj huam sib luag teeb yog lub neej ntev. Nws tuaj yeem hais tias LED teeb pom kev zoo tau txais kev qhuas los ntawm cov neeg siv khoom raws li tus neeg sawv cev ntawm "cov teeb pom kev ntev".
Tam sim no, LED vaj huam sib luag teeb tau siv dav hauv thaj chaw teeb pom kev hauv tsev, thiab tib neeg kev nkag siab ntawm nws tau dhau los ua qhov tob. Yog li yuav ua li cas kom nkag siab thiab nkag siab lub neej ntawm LED vaj huam sib luag teeb? .
1. Kub coefficient ntawm LED volt-ampere yam ntxwv
Peb paub hais tias LED yog ib tug semiconductor diode, nws muaj ib tug volt-ampere yam ntxwv zoo li tag nrho cov diodes, thiab zoo li tag nrho cov semiconductor diodes, no volt-ampere yam ntxwv muaj ib tug kub yam ntxwv. Nws cov yam ntxwv yog tias thaum kub nce, tus yam ntxwv volt-ampere hloov mus rau sab laug.
2. LED teeb pom kev zoo:
Feem ntau cov LEDs dawb yog tau los ntawm kev teeb pom kev xiav LED nrog cov xim daj phosphor. Muaj ob lub laj thawj tseem ceeb rau LED teeb lwj. Ib qho yog lub teeb lwj ntawm xiav LED nws tus kheej. Lub teeb lwj ntawm xiav LED yog nrawm dua li cov xim liab, daj thiab ntsuab LEDs. Lwm qhov yog lub teeb lwj ntawm phosphorus, thiab qhov lwj ntawm phosphors ntawm qhov kub thiab txias yog qhov hnyav heev. Lub teeb lwj ntawm ntau hom LEDs txawv. Lub teeb lwj ntawm LED muaj feem xyuam rau nws qhov kub thiab txias. Qhov hu ua hlws ris kub yog qhov kub ntawm lub semiconductor PN hlws ris. Qhov siab dua qhov sib txuas kub, qhov ua ntej lub teeb tawg tshwm sim, uas yog, lub neej luv luv. Yog li ntawd, tus yuam sij rau lub neej ntev yog txo qhov kub ntawm qhov sib txuas.
3. Yuav ntsuas qhov sib txuas li cas
Qhov ntsuas kub ntawm qhov sib txuas zoo li yog qhov teeb meem ntsuas kub, tab sis qhov ntsuas kub sib txuas yuav tsum ntsuas yog sab hauv LED, thiab tus pas ntsuas kub lossis lub ntsuas kub tsis tuaj yeem muab tso rau hauv PN kev sib tshuam los ntsuas nws qhov ntsuas kub. Tau kawg, nws cov ntaub ntawv kub tseem tuaj yeem ntsuas nrog lub thermocouple, thiab tom qab ntawd nws qhov kub thiab txias tuaj yeem suav tau raws li qhov muab thermal resistance Rjc (hluav taws xob rau rooj plaub). Tab sis tom qab txhim kho lub radiator, qhov teeb meem yuav nyuaj dua.
Vim hais tias LED feem ntau yog soldered rau txhuas substrate, thiab txhuas substrate yog mounted rau ntawm lub radiator, yog hais tias tsuas yog lub kub ntawm lub radiator plhaub yuav tsum tau ntsuas, ces ib tug ntau ntawm thermal resistance qhov tseem ceeb yuav tsum paub los xam cov hlws ris kub. Xws li Rjc (txuas mus rau rooj plaub), Rcm (cov ntaub ntawv rau aluminium substrate, qhov tseeb, nws yuav tsum muaj xws li thermal resistance ntawm zaj duab xis luam phaj), Rms (txhuas substrate rau cua sov dab), Rsa (kub dab dej rau cua), xws li tsuav yog muaj ib cov ntaub ntawv tsis raug tuaj yeem cuam tshuam qhov tseeb ntawm qhov kev xeem.
4. Yuav ua li cas ntsuas qhov ntsuas kub ntawm qhov sib txuas ntawm LEDs.
Tam sim no coj lub teeb vaj huam sib luag LED ua piv txwv los piav qhia yuav ua li cas ntsuas qhov kub ntawm qhov sib txuas ntawm LED. Nws yog qhov yuav tsum tau ua kom cov LEDs tau teeb tsa hauv lub dab dej kub, thiab tus tsav tsheb tam sim no yog siv los ua lub zog.
Nyob rau tib lub sijhawm, rub tawm ob lub xov hlau txuas nrog LED. Txuas lub voltmeter mus rau qhov tso zis (qhov zoo thiab qhov tsis zoo ntawm LED) ua ntej lub hwj chim, tom qab ntawd tig lub hwj chim, thiab ua ntej lub LED heats, tam sim ntawd nyeem cov voltmeter, uas yog sib npaug rau tus nqi ntawm V1, thiab tos ntawm tsawg kawg yog 1 teev, thaum nws tau mus txog qhov sib npaug ntawm qhov sib npaug, ntsuas nws dua, qhov hluav taws xob hla ntawm LED yog sib npaug rau V2. Tshem tawm ob qhov txiaj ntsig no kom tau txais qhov sib txawv. Qhov no raug tshem tawm los ntawm 4mV kom tau txais qhov sib txuas kub. Qhov ntsuas kub ntawm qhov sib txuas tau los ntawm txoj kev no yuav tsum yog qhov tseeb ntau dua li ntsuas qhov ntsuas kub ntawm lub dab dej kub nrog lub thermocouple thiab tom qab ntawd suav qhov ntsuas qhov sib txuas.
5. Yuav ua li cas kwv yees lub neej ntawm LED vaj huam sib luag teeb.
Nws zoo nkaus li tias nws yuav tsum yooj yim heev rau infer lub neej los ntawm kev sib tshuam kub. Tsuas yog xyuas qhov nkhaus hauv daim duab thiab koj tuaj yeem paub tias lub neej sib txuas nrog qhov sib txuas ntawm qhov kub ntawm 95 degrees tuaj yeem tau txais. Lub neej ntawm LED yog 20, 000 teev. Txawm li cas los xij, txoj kev no tseem muaj qee qhov kev ntseeg siab rau sab hauv tsev LED vaj huam sib luag teeb. Yog hais tias nws yog siv rau sab nraum zoov LED teeb, tshwj xeeb tshaj yog high-power LED txoj kev teeb, tseem muaj ntau yam tsis paub tseeb.
6. Yuav ua li cas kom ntev lub neej ntawm LED vaj huam sib luag teeb
Tus yuam sij rau kev ncua nws lub neej yog kom txo nws cov kev sib tshuam kub. Tus yuam sij kom txo qhov kub ntawm qhov sib txuas yog kom muaj lub dab dej kub zoo. Cov cua sov uas tsim los ntawm LED tuaj yeem tawg rau lub sijhawm. Qhov tseeb, qhov no yog qhov teeb meem ntsuas qhov kub thiab txias. Yog tias peb tuaj yeem ntsuas qhov ntsuas kub ntawm qhov sib txuas uas txhua lub tshuab hluav taws xob tuaj yeem ua tiav, tsis yog peb tuaj yeem sib piv cov teebmeem ntawm cov cua sov ntawm ntau lub tshuab hluav taws xob, tab sis kuj paub tias tom qab siv lub tshuab hluav taws xob no Achievable LED lub neej.
Piv nrog rau lwm cov teeb pom kev zoo tib yam, qhov zoo tshaj plaws ntawm LED vaj huam sib luag teeb yog lub neej ntev. Nws tuaj yeem hais tias LED teeb pom kev zoo tau txais kev qhuas los ntawm cov neeg siv khoom raws li tus neeg sawv cev ntawm "cov teeb pom kev ntev".
Tam sim no, LED vaj huam sib luag teeb tau siv dav hauv thaj chaw teeb pom kev hauv tsev, thiab tib neeg kev nkag siab ntawm nws tau dhau los ua qhov tob. Yog li yuav ua li cas kom nkag siab thiab nkag siab lub neej ntawm LED vaj huam sib luag teeb? .
1. Kub coefficient ntawm LED volt-ampere yam ntxwv
Peb paub hais tias LED yog ib tug semiconductor diode, nws muaj ib tug volt-ampere yam ntxwv zoo li tag nrho cov diodes, thiab zoo li tag nrho cov semiconductor diodes, no volt-ampere yam ntxwv muaj ib tug kub yam ntxwv. Nws cov yam ntxwv yog tias thaum kub nce, tus yam ntxwv volt-ampere hloov mus rau sab laug.
2. LED teeb pom kev zoo:
Feem ntau cov LEDs dawb yog tau los ntawm kev teeb pom kev xiav LED nrog cov xim daj phosphor. Muaj ob lub laj thawj tseem ceeb rau LED teeb lwj. Ib qho yog lub teeb lwj ntawm xiav LED nws tus kheej. Lub teeb lwj ntawm xiav LED yog nrawm dua li cov xim liab, daj thiab ntsuab LEDs. Lwm qhov yog lub teeb lwj ntawm phosphorus, thiab qhov lwj ntawm phosphors ntawm qhov kub thiab txias yog qhov hnyav heev. Lub teeb lwj ntawm ntau hom LEDs txawv. Lub teeb lwj ntawm LED muaj feem xyuam rau nws qhov kub thiab txias. Qhov hu ua hlws ris kub yog qhov kub ntawm lub semiconductor PN hlws ris. Qhov siab dua qhov sib txuas kub, qhov ua ntej lub teeb tawg tshwm sim, uas yog, lub neej luv luv. Yog li ntawd, tus yuam sij rau lub neej ntev yog txo qhov kub ntawm qhov sib txuas.
3. Yuav ntsuas qhov sib txuas li cas
Qhov ntsuas kub ntawm qhov sib txuas zoo li yog qhov teeb meem ntsuas kub, tab sis qhov ntsuas kub sib txuas yuav tsum ntsuas yog sab hauv LED, thiab tus pas ntsuas kub lossis lub ntsuas kub tsis tuaj yeem muab tso rau hauv PN kev sib tshuam los ntsuas nws qhov ntsuas kub. Tau kawg, nws cov ntaub ntawv kub tseem tuaj yeem ntsuas nrog lub thermocouple, thiab tom qab ntawd nws qhov kub thiab txias tuaj yeem suav tau raws li qhov muab thermal resistance Rjc (hluav taws xob rau rooj plaub). Tab sis tom qab txhim kho lub radiator, qhov teeb meem yuav nyuaj dua.
Vim hais tias LED feem ntau yog soldered rau txhuas substrate, thiab txhuas substrate yog mounted rau ntawm lub radiator, yog hais tias tsuas yog lub kub ntawm lub radiator plhaub yuav tsum tau ntsuas, ces ib tug ntau ntawm thermal resistance qhov tseem ceeb yuav tsum paub los xam cov hlws ris kub. Xws li Rjc (txuas mus rau rooj plaub), Rcm (cov ntaub ntawv rau aluminium substrate, qhov tseeb, nws yuav tsum muaj xws li thermal resistance ntawm zaj duab xis luam phaj), Rms (txhuas substrate rau cua sov dab), Rsa (kub dab dej rau cua), xws li tsuav yog muaj ib cov ntaub ntawv tsis raug tuaj yeem cuam tshuam qhov tseeb ntawm qhov kev xeem.
4. Yuav ua li cas ntsuas qhov ntsuas kub ntawm qhov sib txuas ntawm LEDs.
Tam sim no coj lub teeb vaj huam sib luag LED ua piv txwv los piav qhia yuav ua li cas ntsuas qhov kub ntawm qhov sib txuas ntawm LED. Nws yog qhov yuav tsum tau ua kom cov LEDs tau teeb tsa hauv lub dab dej kub, thiab tus tsav tsheb tam sim no yog siv los ua lub zog.
Nyob rau tib lub sijhawm, rub tawm ob lub xov hlau txuas nrog LED. Txuas lub voltmeter mus rau qhov tso zis (qhov zoo thiab qhov tsis zoo ntawm LED) ua ntej lub hwj chim, tom qab ntawd tig lub hwj chim, thiab ua ntej lub LED heats, tam sim ntawd nyeem cov voltmeter, uas yog sib npaug rau tus nqi ntawm V1, thiab tos ntawm tsawg kawg yog 1 teev, thaum nws tau mus txog qhov sib npaug ntawm qhov sib npaug, ntsuas nws dua, qhov hluav taws xob hla ntawm LED yog sib npaug rau V2. Tshem tawm ob qhov txiaj ntsig no kom tau txais qhov sib txawv. Qhov no raug tshem tawm los ntawm 4mV kom tau txais qhov sib txuas kub. Qhov ntsuas kub ntawm qhov sib txuas tau los ntawm txoj kev no yuav tsum yog qhov tseeb ntau dua li ntsuas qhov ntsuas kub ntawm lub dab dej kub nrog lub thermocouple thiab tom qab ntawd suav qhov ntsuas qhov sib txuas.
5. Yuav ua li cas kwv yees lub neej ntawm LED vaj huam sib luag teeb.
Nws zoo nkaus li tias nws yuav tsum yooj yim heev rau infer lub neej los ntawm kev sib tshuam kub. Tsuas yog xyuas qhov nkhaus hauv daim duab thiab koj tuaj yeem paub tias lub neej sib txuas nrog qhov sib txuas ntawm qhov kub ntawm 95 degrees tuaj yeem tau txais. Lub neej ntawm LED yog 20, 000 teev. Txawm li cas los xij, txoj kev no tseem muaj qee qhov kev ntseeg siab rau sab hauv tsev LED vaj huam sib luag teeb. Yog hais tias nws yog siv rau sab nraum zoov LED teeb, tshwj xeeb tshaj yog high-power LED txoj kev teeb, tseem muaj ntau yam tsis paub tseeb.
6. Yuav ua li cas kom ntev lub neej ntawm LED vaj huam sib luag teeb
Tus yuam sij rau kev ncua nws lub neej yog kom txo nws cov kev sib tshuam kub. Tus yuam sij kom txo qhov kub ntawm qhov sib txuas yog kom muaj lub dab dej kub zoo. Cov cua sov uas tsim los ntawm LED tuaj yeem tawg rau lub sijhawm. Qhov tseeb, qhov no yog qhov teeb meem ntsuas qhov kub thiab txias. Yog tias peb tuaj yeem ntsuas qhov ntsuas kub ntawm qhov sib txuas uas txhua lub tshuab hluav taws xob tuaj yeem ua tiav, tsis yog peb tuaj yeem sib piv cov teebmeem ntawm cov cua sov ntawm ntau lub tshuab hluav taws xob, tab sis kuj paub tias tom qab siv lub tshuab hluav taws xob no Achievable LED lub neej.
