LED teeb ci qhov chaw thiab cov teeb pom kev zoo nyob rau hauv lub cev qhov loj thiab luminous flux, spectrum, lub teeb siv ntawm qhov sib txawv ntawm lub cev thiab kom muaj ntau heev, LED nrhiav tsis tuaj yeem luam cov teeb pom kev ntawm cov qauv thiab cov qauv. Cia peb hauv qab no rau koj los ua kom paub cov teeb pom kev zoo tshaj plaws ntawm LED.
Tshawb nrhiav ntawm Optical Parameters ntawm LED Teeb
1, luminous siv pom
Kev siv lub teeb, piv txwv li, qhov siv ntawm lub teeb, yog hais txog qhov ntau ntawm lub teeb tawm ntawm lub kaum ntse ntse. CIE127 tus qauv muab kev ntsuas ntawm cov teeb meem ntawm qhov kev ntsuas A (thaj chaw deb thaj chaw), kev ntsuas kev ntsuas B (ze-field conditions) ob txoj kev ntsuas nruab nrab yog qhov tseem ceeb tshaj plaws rau txoj kev ntsuas ntawm kev siv lub teeb, Mus rau lub teeb ntawm tus mob, ob lub caij ntawm lub cheeb tsam ntes yog 1cm2. Nquag, qhov luminous siv yog ntsuas raws li tus qauv ntawm tus qauv B.
2, luminous flux thiab lub teeb ci kom pom tseeb
Qhov luminous flux yog qhov sib npaug ntawm lub teeb ntawm lub teeb tawm ntawm lub teeb ci, uas yog, npaum li cas ntawm lub teeb. Txoj kev nrhiav kom tau muaj xws li ob hom nram qab no:
(1) txoj hauv kev. Nyob rau hauv kev sib txuas ntawm cov qauv, cov qauv teeb thiab cov teeb uas ntsuas tau tshwm sim, thiab lawv cov kev nyeem nyob rau hauv lub duab thaij duab hluav taws xob raug kaw raws li lawv thiab ED, raws li. Thaum tus qauv flux flux yog paub Φ s, luminous flux Φ D = ED × Φ s / Es ntawm lub teeb ntsuas. Kev siv txoj hauv kev siv qhov taw qhia "point light source", kev lag luam yooj yim, tab sis los ntawm cov qauv teeb thiab ntsuas lub teeb xim xim sib txawv, qhov kev ntsuas kev ntsuas.
(2) spectroscopy. Lub luminous flux yog xam los ntawm lub zog spectral P ( λ ) faib. Lub monochromator yog siv los ntsuas 380nm ~ 780nm spectrum ntawm tus qauv teeb nyob rau hauv cov ciav hlau, ces cov spectrum ntawm cov ntsuas teeb raug ntsuas raws li kev cai tib yam, thiab cov luminous flux ntawm lub teeb ntsuas raug suav thiab muab piv.
Qhov luminous efficiency yog qhov sib piv ntawm cov luminous flux uas tau tawm ntawm lub teeb ci mus rau lub hwj huam consumed los ntawm nws, thiab cov luminous efficiency ntawm cov LED feem ntau ntsuas los ntawm tas mus li tam sim no.
3, S pectral yam ntxwv ntawm kev paub
LED spectral cov yam ntxwv ntawm kev kuaj xyuas, nrog rau kev faib hluav taws xob, kev tswj xim, xim kub, xim rendering Performance index, thiab lwm yam.
Qhov kev faib hluav taws xob hauv lub cev pom tau hais tias lub teeb ntawm lub teeb ci tau tsim muaj ntau ntau qhov sib txawv ntawm cov xim tawg, thiab lub zog ntawm txhua lub wavelength sib txawv. Qhov kev kho no yog hu ua lub hwj chim ntawm lub zog ntawm lub teeb ci. Lub teeb ci tau ntsuas los ntawm ib tug spectrophotometer (monochromator) thiab tus qauv teeb.
Cov kob sib kho xim muaj ntau ntawm cov teeb uas pom tau los ntawm lub teeb ci hauv daim duab. Muaj ntau hom kev sib koom tes uas sawv cev rau xim, feem ntau X, Y coordinate system.
Xim kub yog qhov nyiaj ntawm lub teeb xim (tsos nqaij daim tawv kev ua tau zoo) uas tib neeg qhov muag pom. Lub teeb tawm ntawm lub teeb ci tau zoo ib yam li lub teeb xim tawm ntawm lub ntsej muag dub ntawm lub ntsuas kub, uas yog xim kub. Hauv cheeb tsam kev teeb pom kev zoo, xim kub yog qhov tseem ceeb ntawm cov qauv uas pom cov yam ntxwv ntawm qhov muag pom kev. Qhov kev xav ntawm cov xim kub yog muab tau los ntawm cov neeg dub dub thiab tuaj yeem tau los ntawm cov kob ntawm cov xim dub ntawm cov neeg dub dub los ntawm cov xim ntawm cov teeb ci.
Daim phiaj xim qhia tau hais tias lub teeb uas tawm ntawm lub teeb pom kev yog thwj los ntawm cov xim ntawm lub teeb pom kev zoo, feem ntau yog hais los ntawm kev pom xim ntawm Performance Index Ra, Ra yog lub ntsiab txhais ntawm lub teeb xim ntawm yim xim rendering indices. Xim rendering Performance index yog qhov tseem ceeb ntawm qhov zoo ntawm lub teeb ci. Nws txiav txim siab ntawm daim ntawv thov ntau yam ntawm lub teeb qhov chaw thiab txhim kho cov xim rendering ntawm LED dawb. Nws yog ib qho tseem ceeb ntawm cov kev tshawb nrhiav thiab kev tsim teebmeem ntawm LED.
4, L ight uav faib tes t
Cov kev sib raug zoo ntawm lub teeb thiab lub qhov taw qhia (qhov kev taw qhia) yog hu ua lub teeb rau kev siv lub teeb, thiab qhov kaw curve ntawm no tis npe hu ua cov teeb siv ntawm lub teeb. Raws li cov ntsiab lus xeem ntau, thiab txhua tus taw tes los ntawm cov ntaub ntawv ua, feem ntau yog siv ib qho kev tawm tswv yim tsis zoo ntawm tus kws yees duab los ntsuas.
5, T nws nyhuv ntawm qhov kub ntawm qhov chaw kho qhov muag ntawm LED
Qhov kub no yuav cuam tshuam cov yam ntxwv ntawm qhov muag pom ntawm LED. Ntau cov kev sim ua tau qhia tias qhov kub ntawd ua rau cov pa roj carbon dioxide thiab cov xim xim.
6, T nws qhov ci ci qhov ntsuas
Lub teeb nyob rau hauv ib qho kev qhia ntawm lub ci ci ntawm lub teeb nyob rau hauv kev coj ua ntawm qhov seem thaj tsam ntawm qhov kev siv luminous, kev siv dav hlau ci ntom ntom, aiming ci ntom ntom ntsuas ntawm qhov chaw ci ci, lub teeb pom kev thiab ntsuas teeb pom kev 2 qhov chaw.
LED teeb thiab lwm cov kev ua tau zoo ntawm kev ntsuas
1, LED teeb hluav taws xob tsis txog kev ntsuas
Hluav taws xob tsis zoo, xam nrog rau pem hauv ntej, nrawm voltage thiab thim rov qab tam sim no, muaj feem xyuam rau qhov kev lag luam ntawm cov roj teeb, LED teeb tsa los txiav txim seb qhov kev ua tau zoo ntawm ib qhov hauv paus. LED teeb muaj ob hom kev ntsuas hluav taws xob: qhov tam sim no yog qee qhov kev tshwm sim, qhov kev ntsuas tsis raug; voltage yuav tsum yog cov ntaub ntawv, kev kuaj tsis tam sim no. Cov hom kev qhia yog raws li hauv qab no:
(1) rau pem suab. Qhov zoo tam sim no yog siv rau LED teeb txhom tau, thiab ib qhov poob siab voltage yog generated ntawm ob hnub. Kho cov nqi tam sim no los txiav txim xyuas lub hwj huam, sau cov DC voltmeter rau cov kev nyeem ntawv, uas yog, cov teeb nyob rau pem hauv ntej thev hlau. Raws li qhov kev paub zoo, LED zoo conduction, qhov tsis kam yog qhov me me, kev siv lub ammeter sab nraud ntau dua.
(2) rov qab tam sim no. Yuav kom paub tias cov teeb pom kev zoo ntawm cov roj teeb hluav taws xob, hloov lub hwj huam, ntsuas lub cav ntsuas yog qhov ntsuas teeb ntawm lub teeb rov qab tam sim no. Thiab ntsuas qhov zoo qhov hluav taws xob nrog tib qho laj thawj, vim tias qhov rov qab ua txoj kev tswj hwm thaum tus loj dua, siv lub tshuab hluav taws xob sab hauv.
2, LED teeb thermal properties test
LED thermal thaj chaw, cov khoom siv hluav taws xob, cov khoom hluav taws xob muaj feem tseem ceeb. Thermal tsis kam thiab qhov kub thiab txias, yog lub ntsiab thermal ntawm LED2. Thermal raug hais txog thermal ua hauj siab ntawm lub PN hlawv thiab lub plhaub ntawm lub plhaub, piv txwv li qhov sib txawv ntawm qhov kub qhov sib txawv raws cov tshav kub txoj kev mus rau lub hwj chim dissipated ntawm cov channel. Lub qhov cub tshav kub yog qhov kub ntawm PN hlws tsev ntawm LED.
Ntsuas LED hlwv qhov kub thiab thermal ua hauj lwm yog: Infrared micro-instrument method, spectroscopy, hluav taws xob tsis, thermal kuj xa roj teeb hom. Siv cov thermometer hauv tshuab ntsuas kub lossis cov thermocouple ntsuas kub ntiv taw kub li kub qhov kub qhov kub, qhov tseeb tsis txaus.
Tam sim no, feem ntau siv hluav taws xob parameter hom yog txoj kev sib raug ntawm cov pem hauv ntej voltage ntawm LEDP txuas thiab PN qhov kub thiab txias. Lub qhov cub tshav kub ntawm LED yog ntsuas los ntawm kev ntsuas rau pem hauv ntej voltage nco ntawm txawv kub.
Cov khoom kub : LED teeb Teeb , LED qab nthab, teeb hluav taws xob teeb pom kev zoo , qhov teeb meem tsis muaj dej thaiv
