Lub neej ntev npaum li cas ntawm LED teeb?
LED teeb yog tiag tiag lub teeb-emitting diodes. Hauv kuv qhov kev xav, hom diode no zoo heev. Ntau cov khoom siv hluav taws xob siv nws los ua teeb nyem. Nws yog obviously ntau ruaj thiab txhim khu kev qha. Feem ntau hais lus, nws tuaj yeem ncav cuag 100, 000 teev hauv txoj kev xav. Tsis muaj teeb meem. Yog vim li cas vim li cas lub LED yog ruaj khov yog vim nws tsis muaj teeb meem ntawm filament cua tshuab. Tab sis qhov tseeb, kev siv LEDs kuj tseem cuam tshuam ncaj qha rau lub neej kev pab cuam ntawm lwm yam khoom. Lub neej ntawm LED teeb yog txiav txim siab los ntawm lub neej luv tshaj ntawm LEDs, chips thiab lwm yam khoom. Lub neej theoretical kev pabcuam tseem tsuas yog hais txog lub teeb hlaws (tej zaum lub teeb Lub neej theoretical ntawm LED teeb, zoo li tus tsav tsheb LED feem ntau tsis zoo, yog li nws tsis tuaj yeem xav tias lub neej ntawm tag nrho LED lub teeb yog ntev heev.
1. Lub LED muaj qhov nqaim spectrum. Los ntawm qhov kev pom no, nws zoo ib yam li lub teeb tso pa tawm, xws li lub teeb siab siab sodium, uas yog lub teeb daj. Cov teeb pom kev zoo LEDs peb siv feem ntau yog xiav, thiab tom qab ntawd coated nrog daj phosphors los ua lub teeb dawb. Kev siv tiag tiag tau ua pov thawj tias ntau lub teeb LED hauv tsev muaj lub neej ua haujlwm luv luv, thiab txawm tias qhov tsis ua haujlwm yog siab dua li ntau lub teeb ntawm lub khw, vim tias kev tsav tsheb ntawm LED tseem ceeb heev.
2. Feem ntau, lub teeb hlaws yuav kub hnyiab tau, thiab nws yuav tsis teeb, thiab yuav muaj qhov pom tseeb dub hlawv. Yog tias cov khoom siv tsav tsheb tsis zoo, nws yooj yim dua rau dai dua li LED. Feem ntau ntawm lawv yog cov tsav tsheb tsis zoo, xws li cov capacitors cua tshuab, tsav tsheb thiab cov cua sov dissipation yog cov fwj ntawm LEDs, tsis yog lub teeb hlaws.
3. Qhov teeb meem ntawm tshav kub dissipation yog thawj zaug thiab qhov teeb meem loj tshaj plaws nrog kev sib xyaw ua ke (tus qauv hauv tebchaws: tus kheej-ballasted) LED teeb. Qhov teeb meem ntawm cov cua kub dissipation yog tias lub teeb incandescent nws tus kheej xav tau cov filament yuav tsum tau rhuab mus rau incandescent kub, yog li nws xav tau kub kub; lub teeb roj hluav taws xob siab yog qhov yooj yim ballast thiab lub teeb pom kev sib cais, yog li lub ballast tsis ntshai ntawm cov cua sov ntawm lub teeb lub teeb, thiab lub teeb lub teeb raug rau cov cuab yeej. Nws tsis yog ib qho teeb meem loj (kev kub siab mercury lub teeb, hlau halide lub teeb), tau kawg, yog tias nws tsis raug, nws feem ntau raug yuam kom dissipate cua sov (projector, movie tshuab); Lub teeb lub teeb ntawm lub teeb hluav taws xob tsis tshua muaj siab (lub teeb fluorescent, lub teeb txuag hluav taws xob) yog qhov loj heev, yog li cov cua sov Lub teeb lub teeb yuav ploj mus thaum raug huab cua, yog li txawm tias nws yog lub teeb hluav taws xob txuag hluav taws xob, nws cov ballast. yuav tsis ci los ntawm ntau lub teeb, thiab qhov teeb meem tseem tsis loj. LED teeb yog nyuaj heev rau qhov teeb meem no. Ua ntej, LED nti yog ntshai heev ntawm tshav kub. Qhov thib ob, nws yog qhov me me. Nws tsis yog qhov loj npaum li lub teeb hluav taws xob qis uas loj heev uas nws tuaj yeem raug rau huab cua kom dissipate cua sov. Yog li ntawd, LED teeb feem ntau xav tau lub tshuab hluav taws xob. Thaum kawg, vim tias nws xav tau lub tshuab hluav taws xob loj, yog li cov chaw tsim khoom teeb tsa lub ballast rau hauv lub tshuab hluav taws xob.
4. Kev tsav tsheb nrog lub neej ntev tsis yog qhov phem. Txhawm rau txuas ntxiv kev pab cuam lub neej ntawm LED, nws yog ib qho tsim nyog yuav tsum tau txo lossis tag nrho cov cua sov uas tsim los ntawm LED nti. Lub zog hluav taws xob yog qhov laj thawj tseem ceeb rau LEDs tsis ua haujlwm, thiab lub neej ntawm LEDs muaj feem cuam tshuam nrog cov chips thiab cov tsav tsheb ntawm LEDs. Cov LEDs zoo tshaj plaws tuaj yeem tswj tau ntau dua 60 feem pua ntawm thawj lub teeb ci tom qab 50, 000 teev ntawm kev ua haujlwm tas mus li. Piv txwv tias LED tau mus txog nws lub neej muaj txiaj ntsig, nws tseem yuav ci ntsa iab, tsuas yog qaug zog heev.
5. Thaum siv, qhov tam sim no loj heev kom dhau qhov ntxiv tam sim no ntawm LED teeb, uas yuav ua rau muaj kev pheej hmoo ntawm kev kub nyhiab lossis tawg ntawm qee yam khoom hauv LED tsav lub zog.
6. Los ntawm kev xav ntawm lub teeb hlaws, lub neej ntawm LED teeb hlaws yog ua tau. Lub teeb-emitting mechanism ntawm LED yog txiav txim los ntawm cov qauv tshwj xeeb ntawm lub diode. Lub diode feem ntau yog tsim los ntawm pn siv lead ua daim ntawv, electrode thiab optical system. Thaum ib qho kev ncaj ncees rau pem hauv ntej yog siv rau electrode ntawm diode, electrons thiab qhov yuav raug txhaj rau hauv thaj tsam p thiab n. Cov hluav taws xob nkag mus rau thaj tsam p thiab qhov nkag mus rau n-thaj tsam sib npaug rau cov neeg nqa khoom tsawg hauv qhov raug thiab tsis raug. Thaum cov neeg nqa khoom tsawg uas tsis muaj qhov sib npaug txuas ntxiv mus txuas ntxiv nrog cov neeg nqa khoom feem ntau, lawv yuav hloov lub zog ntxiv los ntawm kev tawg photons. rau lub teeb zog. Lub teeb-emitting txheej txheem ntawm LED muaj peb qhov chaw: cov cab kuj txhaj tshuaj nyob rau hauv pem hauv ntej bias, recombination radiation thiab lub teeb lub zog kis tau tus mob. Nws tuaj yeem pom tau tias LED tsuas yog tso siab rau qhov kev txav mus los ntawm cov nqa khoom mus rau emit lub teeb, thiab tsis muaj qhov tshwm sim ntawm kev laus thiab hlawv. Nws tshwj xeeb lub teeb-emitting tshuab txiav txim siab nws lub teeb-emitting lub neej ntev li 50, 000 txog 100,{11}} teev. LED teeb lwj yog qeeb, tsis dheev tawm.
7. Ib puag ncig huab cua kuj yog ib qho tseem ceeb uas cuam tshuam rau lub neej ntawm LED teeb. Qhov teeb meem ntawm "dej pos huab" ntawm LED teeb, taw tes taws tswm ciab, teeb lub teeb, dej nyab teeb, thiab lwm yam., tom qab teeb pom kev zoo rau lub sijhawm, cov phab ntsa sab hauv ntawm lub npog sab nrauv nthuav tawm qhov tshwm sim ntawm cov dej ntws thiab dej pos huab. LED teeb yog feem ntau sib sau ua ke los ntawm ntau yam khoom sib txawv, xws li cov cua kub dissipation ntawm lub khob lub teeb yog hlau, lub teeb yog yas, thiab lwm yam.; lub teeb yuav tsim kom muaj qee qhov kub ntawm lub sijhawm ua haujlwm, thiab cov thermal expansion coefficients ntawm cov khoom sib txawv txawv. Muaj qhov sib txawv ntawm lub teeb ci thiab cua nkag; Thaum siv nyob rau hauv ib puag ncig nrog cov av noo, qhov kub thiab txias sab hauv thiab sab nraud ntawm lub teeb pom kev sib txawv, thiab cov cua kub hauv lub teeb pom kev zoo yuav nkag siab tias lub teeb yog txias. Yog tias cov pa roj muaj cov pa ntau dua nyob rau lub sijhawm no, nws yuav tshwm sim. Qhov tshwm sim ntawm cov dej pos huab thiab cov tee dej yuav ploj mus tom qab teeb pom kev zoo rau lub sijhawm.
8. Thaum LED kev khiav hauj lwm kub qis dua 25 degree, lub neej kev pab cuam yog 100, 000 teev; thaum qhov kub thiab txias yog 25-50 degree, lub neej kev pab cuam yog 50, 000 teev; thaum qhov kub thiab txias yog 50-75 degree, lub neej kev pab yog 20, 000 teev; Lub neej ua haujlwm yog 10,{11}} teev ntawm 100-125 degree, 5,{14}} teev ntawm 125-150 degree, thiab 2,{17}} teev ntawm {{18} } degree.
9. Cov cua sov ntawm LED, los ntawm kev xav ntawm ib lub teeb hlaws, feem ntau yog vim cua sov ntawm sab hauv PN hlws ris. Los ntawm cov xwm txheej tam sim no, tsis muaj txoj hauv kev los daws nws. Txhawm rau txo cov cua sov "los ntawm qhov chaw", tam sim no zoo li yog tias koj tsuas yog yuav tsum tau txo lub zog tawm tswv yim, xws li ntxiv 1A ntawm tam sim no, koj tsuas yog muab 0.7-0.8A. Qhov no kuj yog ib qho kev sib haum xeeb hauv kev lag luam ob peb xyoos dhau los, thiab nws kuj yog ib qho kev coj ua. Tom qab tag nrho, qhov kev ua tau zoo ntawm lub tshuab hluav taws xob tau nce ntau, thiab tus nqi nce yog qhov tseem ceeb. Yog xav paub ntxiv, thov xa mus rau CPU radiator.
1 0. Cov neeg tsav tsheb yuav tsum xyuam xim rau ob qho teeb meem. Thawj qhov tam sim no haum rau koj lub hom phiaj LED; Qhov thib ob yog tias qhov tsawg kawg nkaus tus nqi ntawm qhov voltage yog qis dua Vf ntawm koj lub hom phiaj LED, thiab tus nqi siab tshaj yog siab tshaj Vf ntawm koj lub hom phiaj LED. Feem ntau, Vf ntawm lub teeb hlaws yog li 3V. Piv txwv tias koj lub teeb LED txuas nrog hauv series los ntawm 6 lub teeb hlaws, nws Vf kwv yees li 18V (17.4 ~ 19.8V), uas tsis haum rau koj. Piv txwv tias kuv lub teeb ci LED qab nthab yog 0.5W daim ntawm ob lub LED tuag thiab tom qab ntawd 12 khub txuas nrog hauv series, ces qhov kwv yees Vf yog 36V, tam sim no ntawm txhua lub teeb hlaws yog 0.15A * 3V{{15 }}.45W, thiab lub zog yog 10.8W, yog li nws tsim nyog tus tsav tsheb no
Lub xiav capacitor thiab 47 ohm resistor ua si ib qho kev nqis tes ua, thiab cov dub electrolytic capacitor plays lub filtering thiab voltage-stabilizing nyhuv. Nws tsis tau yooj yim dua li qhov no. Yog hais tias lub teeb yog 10W, lub hwj chim ntawm lub resistor yog 0.1W, thiab nws muaj qhov kub thiab txias, uas muaj kev cuam tshuam loj heev rau lub neej.
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