Led Sawb Lub Teeb Decay Teeb Meem
Jun 09, 2022
LED sawb lub teeb tsis ua hauj lwm yog lub teeb nyob rau hauv kev sib kis ntawm lub teeb liab tsis muaj zog, thiab nyob rau theem no lub ntiaj teb no LED manufacturers tau ua cov khoom LED teeb tsis ua hauj lwm degree txawv, high-power LED kuj muaj teeb tsis ua hauj lwm, uas muaj ib tug ncaj qha kev sib raug zoo nrog. qhov kub thiab txias, feem ntau yog los ntawm nti, phosphor thiab ntim tshuab los txiav txim siab. Cov LEDs tiag tiag hauv khw tam sim no muaj nyob rau hauv daim ntawv ntawm LEDs dawb, uas tej zaum yuav yog ib qho teeb meem tseem ceeb rau pej xeem teeb pom kev zoo. Rau LED teeb lwj feem ntau muaj ob yam hauv qab no.
A, coj lub teeb bar nws tus kheej teeb meem zoo.
1, kev siv LED grain zoo tsis zoo, ci ntsa iab sai.
2, cov txheej txheem ntau lawm tsis xws luag, LED grain tshav kub tsis tuaj yeem ua tau zoo los ntawm tus PIN ko taw xa tawm, ua rau LED grain kub siab dhau heev kom lub nti attenuation nrawm.
Qhov thib ob, kev siv cov xwm txheej.
1, LED rau qhov tsav tam sim no, muaj qee qhov LEDs siv hluav taws xob tsav vim li cas thiaj ua rau LED attenuation dhau.
2, lub zog tsav tam sim no ntau dua li qhov ntsuas kev tsav tsheb.
Nyob rau hauv qhov tseeb, coj sawb lub teeb lwj rau ntau yam, qhov tseem ceeb los yog thermal teeb meem, txawm hais tias muaj ntau manufacturers nyob rau hauv lub thib ob cov khoom tsis them tshwj xeeb mloog mus rau qhov teeb meem ntawm tshav kub dissipation, tab sis cov khoom thib ob.
Txawm hais tias muaj ntau lub tuam txhab nyob rau hauv cov khoom lag luam theem nrab tsis them nyiaj tshwj xeeb rau qhov teeb meem ntawm cov cua kub dissipation, tab sis cov khoom siv LED theem ob nyob rau hauv kev siv mus sij hawm ntev, cov degree ntawm lub teeb lwj yuav siab dua cov khoom siv LED nrog rau cov cua sov dissipation.
Lub thermal tsis kam ntawm qhov tuag, lub zog ntawm cov kua nplaum nyiaj, lub tshav kub dissipation ntawm lub substrate, nrog rau cov gel thiab kub hlau kuj tseem cuam tshuam rau lub teeb tsis ua hauj lwm.
Ib qho tshwj xeeb zoo nkauj ntawm cov khoom siv semiconductor yog cov khoom hu ua; muaj ob hom kev nqa khoom: ib qho yog electrons, uas tsis zoo them; lwm qhov yog qhov, uas yog qhov zoo them.
LCD lub teeb-emitting lub hauv paus ntsiab lus yog kev siv ntawm ob lub nqa khoom nyob rau hauv tej yam kev mob yuav tsum tau ua ke, lub zog tso tawm nyob rau hauv daim ntawv ntawm
Lub hauv paus ntsiab lus ntawm luminescence nyob rau hauv LCDs yog kev siv ob lub cab kuj tuaj yeem ua ke nyob rau hauv qee yam mob thiab tso tawm lub zog hauv daim ntawv ntawm photons.
Yog li ntawd, raws li cov ntaub ntawv sib txawv, cov khoom siv hluav taws xob thiab qhov nyob ntawm qhov sib txawv ntawm lub zog, uas yog hais tias, qhov sib txheeb ntawm lub zog ntawm electrons thiab qhov siab.
Qhov sib txawv yog los txiav txim siab qhov sib xyaw ua ke ntawm ob lub tuam txhab muab los ntawm qib zog, koj tuaj yeem tsim cov photons sib txawv, uas tuaj yeem tswj cov LED.
Qhov no tso cai rau lub wavelength ntawm lub teeb tawm los ntawm LED kom tswj tau, piv txwv li cov spectrum lossis xim.
Rau feem ntau daim ntawv thov, LEDs yog supercharged los ntawm cov tam sim no ncaj qha, uas muaj cov yam ntxwv hauv qab no.
Cov yam ntxwv ntawm Parabolic: Thaum muaj qhov zoo txaus nyob rau hauv DC tam sim no, tam sim no ntawm LED nce nrawm, thiab qhov tam sim no tuaj yog
Qhov voltage hla lub LED yog hu ua "downward bias voltage". Yog tias qhov hluav taws xob sib txawv ntawm qhov siab mus rau qis, nws txhais tau hais tias qhov tsis zoo yog qhov txawv txav.
Qhov luv luv wavelength ntawm LED, qhov voltage yuav ntau dua.
Tus cwj pwm tsis zoo rov qab: raws li lub npe qhia, yog muab LED qhov tsis zoo hluav taws xob, tseem hu ua "tawg hluav taws xob", feem ntau hais lus, cov khoom siv LED sib txawv yuav muaj lawv tus kheej tsim nyog voltage nqi.
Feem ntau hais lus, cov khoom siv LED sib txawv muaj lawv tus kheej qhov tsim nyog voltage qhov tseem ceeb, thiab qhov ua rau cov yam ntxwv tsis zoo rov qab yog electrostatic tawm, cov yam ntxwv no kuj tuaj yeem siv los ntsuas qhov zoo ntawm LED no.
Cov khoom tseem ceeb ntawm LEDs yog pn tiv tauj nto, thiab lub rooj vag kua (Thyristor) yog ib qho kev tswj xyuas feem ntau ntawm hluav taws xob fais fab, thaum nws cov tuab tsis sib xws.
Thaum lub thickness ntawm Thyristor tsis sib xws, yuav muaj qhov xwm txheej uas cov qib pn cuam tshuam, thiab qhov sib txawv voltage yuav txawv heev.
Yog tias qhov sib txawv ntawm qhov hluav taws xob loj dhau, qhov zoo ntawm cov khoom tsis zoo, yog li qhov no kuj tuaj yeem siv los ntsuas qhov zoo ntawm LED.
Txawm li cas los xij, es tsis txhob siv lub rooj vag cuam tshuam los txiav txim qhov zoo ntawm LED, VFD ntawm LED feem ntau yog kuaj los txiav txim seb nws tsawg dua 0.1V.
VFD tsawg dua 0.1V suav tias yog qhov txaus siab.