Tech Ntoo|Piav qhia txog qhov ua rau ntawm LED hlws ris kub kom ntxaws
"LED hlws ris kub" tsis yog li paub rau feem ntau ntawm cov neeg, tab sis txawm cov neeg nyob rau hauv kev lag luam LED tsis yog li ntawd meej! Tam sim no cia peb piav qhia meej. Thaum LED ua haujlwm, cov xwm txheej hauv qab no tuaj yeem ua rau qhov sib txuas ntawm qhov kub thiab txias nce mus rau qhov sib txawv.
1. After many times of practice, it has been proved that the limitation of light extraction efficiency is the main reason for the increase of LED junction temperature. At present, the advanced material growth and component manufacturing process can convert most of the input electrical energy of the LED into light radiation energy. However, compared with the surrounding medium, the LED chip material has a much larger refractive index, resulting in an extremely large amount of energy generated inside the chip. Part of the photons (>90 feem pua ) tsis tuaj yeem ntws tawm ntawm qhov sib cuam tshuam, tab sis tsim tag nrho cov kev xav ntawm qhov sib cuam tshuam ntawm cov nti thiab nruab nrab, rov qab mus rau sab hauv ntawm lub nti, thiab thaum kawg absorbed los ntawm cov khoom siv nti lossis substrate los ntawm ntau qhov kev xav sab hauv, thiab hloov. nyob rau hauv daim ntawv ntawm lattice vibration. ua kom sov, ua rau qhov sib txuas ntawm qhov kub thiab txias.
2. Txij li thaum PN kev sib tshuam tsis tuaj yeem ua tau zoo heev, qhov kev txhaj tshuaj ntawm cov khoom yuav tsis ncav cuag 100 feem pua. Qhov ntawd yog hais tias, thaum lub LED ua haujlwm, ntxiv rau kev txhaj tshuaj ntawm cov nqi (qhov) los ntawm thaj av P mus rau thaj tsam N, thaj tsam N kuj tseem yuav raug nqi (electrons) raug txhaj rau hauv cheeb tsam P. Raws li ib txwm muaj, hom tom kawg ntawm kev txhaj tshuaj yuav tsis tsim cov nyhuv photoelectric, tab sis yuav tau noj hauv daim ntawv ntawm tshav kub. Txawm hais tias qhov tseem ceeb yog txhaj nrog cov nqi them, nws yuav tsis tig mus rau hauv lub teeb, thiab qee qhov yuav dhau los ua cua sov ua ke nrog impurities lossis tsis xws luag hauv cheeb tsam junction.
3. Cov qauv hluav taws xob tsis zoo ntawm cov khoom siv, cov ntaub ntawv ntawm lub qhov rais txheej substrate los yog hlws ris cheeb tsam, thiab conductive silver kua nplaum tag nrho muaj tej yam tseem ceeb kuj. Cov kev tawm tsam no tau muab tso rau ntawm ib leeg los tsim cov kev tawm tsam ntawm LED Cheebtsam. Thaum cov tam sim no ntws los ntawm PN hlws ris, nws kuj ntws los ntawm cov resistors, uas ua rau Joule cua sov, uas ua rau ib tug nce nyob rau hauv nti kub los yog hlws ris kub.
Cov saum toj no yog cov laj thawj tseem ceeb rau LED qhov sib txuas kub, thiab tau kawg lwm tus tsis suav nrog. Yog lawm, peb tsis tuaj yeem nkag siab txog cov tshuaj lom neeg lossis lub cev tshwm sim ntawm lawv, tab sis nyob rau yav tom ntej, nrog kev nce qib ntawm kev tshawb fawb thiab thev naus laus zis, peb tuaj yeem ua tau zoo dua los piav qhia qhov tshwm sim, kev tshawb fawb yuav siv nws cov khawv koob los daws peb cov kev tsis ntseeg ib los ntawm ib ib!
