Cuaj qhov ntsuas rau kev ntsuas qhov zoo ntawm LEDs
1. LED tam sim no/voltage parameters (forward, thim rov qab)
LEDs muaj PN junction volt -ampere yam ntxwv. Qhov tam sim no dhau mus ncaj qha cuam tshuam rau lub luminous brightness ntawm LEDs thiab ua ke nyob rau hauv PN series -parallel mode. Cov yam ntxwv ntawm cov LEDs cuam tshuam yuav tsum raug sib txuam, thiab lawv cov yam ntxwv hluav taws xob rov qab yuav tsum tau txiav txim siab hauv AC ua haujlwm. . Yog li ntawd, lawv yuav tsum tau sim rau qhov tsis xws li rau pem hauv ntej tam sim no thiab rau pem hauv ntej voltage poob ntawm qhov chaw khiav hauj lwm, nrog rau cov thim rov qab tam sim no thiab rov qab tawg voltage.
2. Luminous flux thiab radiant flux ntawm LED
Tag nrho cov hluav taws xob hluav taws xob hluav taws xob tawm los ntawm LED hauv ib lub sijhawm yog hu ua radiant flux, lossis optical power (W). Rau LED qhov chaw teeb pom kev zoo rau kev teeb pom kev zoo, qhov pom kev ntawm lub teeb pom kev muaj kev txhawj xeeb ntau dua, uas yog, ib feem ntawm cov hluav taws xob hluav taws xob tawm los ntawm lub teeb ci uas tuaj yeem pom los ntawm tib neeg lub qhov muag, uas yog hu ua luminous flux. Qhov sib piv ntawm cov radiant flux mus rau lub zog hluav taws xob ntawm lub cuab yeej sawv cev rau lub zog hluav taws xob ntawm LED.
3. LED lub teeb siv zog faib nkhaus
Lub teeb siv hluav taws xob faib nkhaus yog siv los sawv cev rau lub xeev kev faib tawm ntawm lub teeb tawm los ntawm LED nyob rau hauv tag nrho cov lus qhia hauv qhov chaw. Hauv kev siv teeb pom kev zoo, lub teeb ci siv hluav taws xob yog cov ntaub ntawv yooj yim tshaj plaws thaum xam cov teeb pom kev zoo ntawm qhov chaw ua haujlwm thiab kev teeb tsa ntawm LEDs. Rau LEDs uas nws spatial beams yog rotationally symmetric distributions, nws muaj peev xwm sawv cev los ntawm ib tug nkhaus hla lub dav hlau ntawm lub beam axis; rau LEDs uas nws cov kab teeb yog elliptical faib, cov nkhaus ntawm ob lub dav hlau ntsug hla ntawm kab axis thiab ntev thiab luv axes ntawm lub ellipse tuaj yeem siv tau. sawv cev; rau asymmetric complex graphics, feem ntau siv los sawv cev rau lub dav hlau nkhaus ntawm ntau tshaj 6 cross-sections ntawm lub beam axis.
4. LED spectral fais fab faib
Lub zog spectral faib ntawm LED sawv cev rau kev ua haujlwm ntawm lub zog hluav taws xob raws li kev ua haujlwm ntawm wavelength, uas tsis tsuas yog txiav txim siab xim ntawm lub teeb, tab sis kuj txiav txim siab nws cov luminous flux thiab xim rendering Performance index. Feem ntau cov txheeb ze spectral fais fab faib yog sawv cev los ntawm cov ntawv S(λ). Thaum lub zog spectral poob mus rau 50 feem pua ntawm nws cov nqi raws ob sab ntawm lub ncov, qhov sib txawv ntawm ob lub wavelengths (Δλ=λ2-λ1) yog cov spectral band.
5. Lub chromaticity coordinates ntawm LED
Rau peb lub ntsiab xim liab (R), ntsuab (G), thiab xiav (B), x=R/(R ntxiv rau G ntxiv B), y=G/(R ntxiv rau G ntxiv B), z=(R plus G plus B). Txij li thaum x plus y plus z=1, tsuas yog muab cov txiaj ntsig ntawm x thiab y, xim tuaj yeem txiav txim siab tshwj xeeb, uas feem ntau hu ua chromaticity daim duab. Yog tias x thiab y siv los ua lub dav hlau sib koom ua ke, qhov x thiab y qhov tseem ceeb ntawm ntau yam xim hauv qhov xwm txheej yog ntsuas los ntawm txoj kev sim colorimetric, thiab daim duab chromaticity tuaj yeem tau los ntawm kev kos lawv hauv lub dav hlau sib koom ua ke. Ib qho taw tes ntawm tus nplaig nkhaus raws ntug ntawm daim duab chromaticity sawv cev rau lub xim ntawm lub teeb ntawm lub teeb, thiab ib qho taw tes hauv qhov nkhaus sawv cev rau cov xim ntawm ib lub teeb sib xyaw uas tib neeg lub qhov muag pom tau.
6. LED xim kub thiab xim rendering Performance index
Rau LEDs thiab lwm yam teeb pom kev zoo uas nws cov xim luminous yog qhov zoo ib yam, cov chromaticity coordinates tuaj yeem qhia meej cov xim ntawm lub teeb pom kev zoo, tab sis cov nqi tshwj xeeb yog qhov nyuaj rau kev cuam tshuam nrog lub teeb xim kev xav. Cov neeg feem ntau xa mus rau lub teeb xim uas yog txiv kab ntxwv ntau dua -liab li "xim sov", thiab cov xim ntau dua los yog xim xiav me ntsis hu ua "xim txias". Yog li ntawd, nws yog ntau intuitive siv xim kub los sawv cev lub teeb xim ntawm lub teeb qhov chaw.
7. Kev ua haujlwm thermal ntawm LED
Kev txhim kho ntawm cov luminous efficiency thiab lub zog ntawm LED teeb pom kev zoo yog ib qho ntawm cov teeb meem tseem ceeb hauv kev txhim kho kev lag luam LED tam sim no. Nyob rau tib lub sijhawm, PN junction kub ntawm LED thiab cov cua kub dissipation ntawm rooj plaub yog qhov tseem ceeb tshwj xeeb, uas feem ntau qhia los ntawm qhov tsis xws li thermal resistance, case temperature, thiab junction temperature.
8. LED hluav taws xob kev nyab xeeb
Tam sim no, International Electrotechnical Commission (IEC) sib npaug ntawm cov khoom siv LED nrog cov kev cai ntawm semiconductor lasers rau kev kuaj hluav taws xob kev nyab xeeb thiab ua qauv qhia. Vim tias LED yog lub teeb ci -emitting ntaus ntawv nrog cov nqaj nqaim thiab lub teeb ci siab, txiav txim siab tias nws cov hluav taws xob tuaj yeem ua mob rau lub retina ntawm tib neeg lub qhov muag, cov qauv thoob ntiaj teb tau teev cov kev txwv txwv thiab cov kev sim ntawm cov hluav taws xob zoo rau LEDs siv ntau zaus. Tam sim no nyob rau hauv European Union thiab Tebchaws Meskas, cov hluav taws xob kev nyab xeeb ntawm cov khoom siv teeb pom kev zoo LED tau ua raws li qhov yuav tsum tau muaj kev nyab xeeb.
9. LED kev ntseeg tau thiab lub neej
Kev ntseeg siab Performance index yog siv los ntsuas lub peev xwm ntawm LED ua haujlwm ib txwm nyob hauv ntau qhov chaw. Lub neej yog qhov ntsuas zoo los ntsuas lub voj voog siv tau ntawm cov khoom siv LED, feem ntau qhia tias lub neej zoo lossis lub neej kawg. Hauv daim ntawv thov teeb pom kev zoo, lub neej muaj txiaj ntsig yog hais txog lub sijhawm uas LED siv sijhawm thaum lub teeb ci ntsa iab ploj mus rau feem pua (tus nqi tshwj xeeb) ntawm tus nqi pib raws li qhov ntsuas hluav taws xob.
(1) Qhov nruab nrab lifespan: Ib pawg ntawm LEDs tau teeb rau tib lub sijhawm. Tom qab ib lub sijhawm, qhov kev faib ua feem ntawm tsis yog -lit LEDs nce mus txog 50 feem pua.
(2) Kev lag luam lifespan: Xav txog qhov kev puas tsuaj ntawm LED thiab lub teeb tso zis attenuation nyob rau tib lub sij hawm, lub sij hawm thaum cov ntaub ntawv tso tawm raug txo rau ib qho kev faib ua feem, qhov kev faib ua feem no yog 70 feem pua thaum siv rau sab nraum zoov qhov chaw, thiab 80 feem pua thaum siv rau Qhov chaw teeb pom kev hauv tsev.
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