1. Tam sim no/voltage parameters ntawm dawb LEDs (zoo thiab rov qab)
Cov LED dawb muaj cov yam ntxwv ntawm PN kev sib tshuam volt-ampere. Qhov tam sim no ncaj qha cuam tshuam rau lub luminance ntawm lub teeb dawb LED thiab PN txoj hlua sib txuas. Cov yam ntxwv ntawm cov LEDs dawb yuav tsum tau sib phim. Hauv AC hom, qhov rov qab yuav tsum tau txiav txim siab. Cov yam ntxwv hluav taws xob. Yog li ntawd, lawv yuav tsum tau sim rau pem hauv ntej tam sim no thiab pem hauv ntej voltage poob ntawm qhov chaw ua hauj lwm, nrog rau cov tsis xws li thim rov qab to tam sim no thiab rov qab breakdown voltage.
2. Luminous flux thiab radiant flux ntawm dawb LED
Tag nrho cov hluav taws xob hluav taws xob hluav taws xob tawm los ntawm LED dawb nyob rau hauv ib chav tsev ntawm lub sijhawm hu ua radiant flux, uas yog lub zog kho qhov muag (W). Rau qhov dawb LED teeb qhov chaw rau illumination, qhov kev txhawj xeeb ntau dua yog qhov pom kev ntawm lub teeb pom kev zoo, uas yog, tus nqi ntawm cov hluav taws xob hluav taws xob tawm los ntawm lub teeb ci tuaj yeem ua rau tib neeg lub qhov muag pom, hu ua luminous flux. Qhov piv ntawm cov radiant flux mus rau lub zog hluav taws xob ntawm lub cuab yeej sawv cev rau cov hluav taws xob hluav taws xob ntawm LED dawb.
3. Lub teeb siv hluav taws xob faib nkhaus ntawm LED dawb
Lub teeb siv hluav taws xob faib nkhaus yog siv los qhia txog kev faib tawm ntawm lub teeb tawm los ntawm LED hauv txhua qhov chaw ntawm qhov chaw. Hauv kev siv teeb pom kev zoo, lub teeb 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 ib tug LED uas nws spatial beam yog rotationally symmetrical, nws muaj peev xwm sawv cev los ntawm ib tug nkhaus ntawm lub dav hlau ntawm lub beam axis; Rau ib qho LED nrog lub teeb elliptical, qhov nkhaus ntawm ob lub dav hlau ntsug ntawm lub nqaj axis thiab elliptical axis yog siv. Txhawm rau sawv cev rau daim duab asymmetrical complex, nws yog feem ntau sawv cev los ntawm lub dav hlau nkhaus ntawm ntau tshaj 6 seem ntawm lub nqaj axis.
4, spectral fais fab faib ntawm dawb LED
Lub spectral fais fab faib ntawm ib tug dawb LED sawv cev rau ib tug muaj nuj nqi ntawm lub radiant zog raws li ib tug muaj nuj nqi ntawm wavelength. Nws txiav txim siab ob qho tib si xim ntawm luminescence thiab nws cov luminous flux thiab xim rendering Performance index. Feem ntau, tus txheeb ze spectral fais fab faib yog sawv cev los ntawm cov ntawv S(λ). Thaum lub zog spectral poob mus rau 50% ntawm nws cov nqi raws ob sab ntawm lub ncov, qhov sib txawv ntawm ob lub wavelengths (Δλ = λ2-λ1) yog spectral band.
5, xim kub thiab xim rendering Performance index ntawm dawb LED
Rau lub teeb pom kev zoo xws li LED dawb uas tawm teeb pom kev zoo, cov chromaticity coordinates tuaj yeem qhia meej cov xim ntawm lub teeb pom kev zoo, tab sis tus nqi tshwj xeeb yog qhov nyuaj rau kev koom tes nrog cov kev cai xim xim pom. Cov neeg feem ntau xa mus rau lub teeb-xim txiv kab ntxwv-liab xim li "sov xim", thiab qhov ntau blazing los yog xim xiav me ntsis hu ua "xim txias". Yog li ntawd, nws yog ntau intuitive siv xim kub los qhia lub teeb xim ntawm lub teeb qhov chaw.
7, thermal kev ua tau zoo ntawm dawb LED
Kev txhim kho ntawm LED luminous efficiency thiab lub zog rau teeb pom kev zoo yog ib qho ntawm cov teeb meem tseem ceeb hauv kev txhim kho tam sim no ntawm LED kev lag luam. Nyob rau tib lub sijhawm, PN hlws ris kub ntawm LED thiab cov teeb meem kub kub ntawm lub tsev yog qhov tseem ceeb tshwj xeeb, thiab feem ntau qhia los ntawm qhov tsis xws li thermal resistance, case temperature, thiab junction temperature.
8, hluav taws xob kev nyab xeeb ntawm dawb LED
Tam sim no, International Electrotechnical Commission (IEC) sib npaug 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 nqaim, lub teeb pom kev zoo siab, xav txog nws cov hluav taws xob yuav ua rau muaj kev phom sij rau tib neeg lub qhov muag retina, tus txheej txheem thoob ntiaj teb qhia txog cov kev txwv thiab cov kev sim rau kev siv hluav taws xob zoo rau LEDs siv ntau zaus. Kev nyab xeeb hluav taws xob rau cov khoom siv teeb pom kev zoo LED tam sim no tau ua raws li qhov yuav tsum tau muaj kev nyab xeeb hauv European Union thiab Tebchaws Meskas.
9, kev ntseeg siab thiab lub neej ntawm LED dawb
Kev ntsuas kev ntseeg tau siv los ntsuas lub peev xwm ntawm LEDs ua haujlwm zoo hauv ntau qhov chaw. Lub neej ntev yog ib qho kev ntsuas ntawm lub neej muaj txiaj ntsig ntawm cov khoom siv LED thiab feem ntau yog qhia txog lub neej muaj txiaj ntsig lossis qhov kawg ntawm lub neej. Hauv kev siv teeb pom kev zoo, lub neej zoo yog lub sijhawm nws siv rau LED kom lwj mus rau feem pua ntawm cov nqi pib (tus nqi sau) ntawm lub zog ntsuas.
(1) Lub neej nruab nrab: Lub sijhawm coj mus rau ib pawg ntawm LEDs kom teeb pom kev tib lub sijhawm, thaum qhov kev faib ua feem ntawm cov LEDs tsis kaj siab txog 50% tom qab lub sijhawm.
(2) Kev lag luam lub neej: Thaum xav txog ob qho tib si LED kev puas tsuaj thiab kev txo qis ntawm lub teeb pom kev zoo, cov khoom siv sib xyaw ua ke raug txo qis rau qee lub sijhawm, uas yog 70% rau cov teeb pom kev sab nraum zoov thiab 80% rau cov teeb pom kev hauv tsev.