LEDs (Teeb qhib diodes) ua haujlwm los ntawm cov txheej txheem hu uaElectroluminescence Yeeb Nkab, qhov twg emritted thaum muaj hluav taws xob txuas ntxiv los ntawm cov khoom siv hluav taws xob semiconductor. Ntawm no yog ib qib zuj zus ntawm qhov lawv muaj nuj nqi:
1. Cov qauv theem pib
Ib LED muaj:
Chemiconductor Chip: Ua los ntawm ob txheej:
n-hom txheej: Rich nyob rau hauv tsis zoo them rau cov electrons.
P-hom txheej: Rich nyob rau hauv muaj tseeb them "qhov" (tsis muaj ntawm cov tshuab hluav taws xob).
Pn hlws ris: Tus ciam chaw uas n-hom thiab p-hom txheej sib ntsib.
Anode \/ Cathode: Cov Khoom Sib Txuas Hluav Taws Xob uas thov voltage.
Epoxy Lens: Tsom xam thiab tiv thaiv lub teeb-emitting nti.
2. Koj lub teeb tau ua li cas
Kauj ruam 1: Kev tsis ncaj ncees tom ntej
Thaum voltage yog thov rau anode (zoo) thiab cathode (tsis zoo), cov txheej txheem hluav taws xob lossis cov txheej p-hom txheej txav mus rau n-hom txheej.
Kauj ruam 2: Kev kho kom zoo
Ntawm PN hlws ris, hluav taws xob "sau" qhov hauv cov txheej p-hom. Thaum qhov no tshwm sim, lub zog tso tawm hauv daim ntawv ntawmlub npe(lub teeb taw).
Kauj ruam 3: Photon emission
Lub zog (xim) ntawm lub photon emitted nyob ntawmQHAB TIAVNtawm cov khoom siv semiconductor (piv txwv li, gallium arsenide rau lub teeb liab, indium gallium nitride rau lub teeb xiav).
3. TSEEM CEEB
QHAB TIAV:
Bandger Band ua rau muaj zog photes fais fab (xiav \/ UV teeb).
Me band band gaps tau qis dua hluav taws xob photons (liab \/ infrared teeb).
Cov Khoom Siv:
Txawv cov alloys zoo sib xws yog siv los ua kom tiav cov xim tshwj xeeb.
Dawb leds feem ntau sib txuas cov xiav leds nrogphosphor txheejTxhawm rau hloov qee lub teeb xiav xiav rau hauv daj \/ ntsuab \/ liab wavelengths.
4. Kev ua tau zoo & Cov txiaj ntsig
Tsawg heev thaum tshav kub kub: Tsis zoo li inlandescent qhov muag teev (uas pov tseg 90% ntawm lub zog li cua sov), coj hloov lub zog feem ntau hauv lub teeb.
Kev muaj peev xwm: Tsis muaj qhov tsis txaus ntseeg - coj los txo qis thaum lub sijhawm (piv txwv li, poob 30% ci ci tom qab 50, {}} teev).
Directional Teeb: Emits teeb nyob rau hauv ib qho kev coj ua, txo qhov kev xav tau ntawm cov xav tau.
5. Kev thov
Teeb: Qhov muag teev, kev teeb tsa, tsheb kho tsheb.
Lus Qhia: TVS, smartphones, digital billboards (siv RGB LEDs).
Ntsuas: Lub zog khawm, cov paib teeb liab.
Vim li cas LEDs tsis ua haujlwm zoo li qhov muag teev tsis tu ncua
Incandescent qij siv ib tug rhuab filamam kom ci, thaum coj cia siab rauKev siv hluav taws xob-qhov nruabnyob rau hauv semiconductors. Qhov no ua rau leds ntau lub zog-txuag tau, ruaj, thiab ntau yam hauv kev tswj xim.
Hauv ntej, coj hluav taws xob tig hluav taws xob rau hauv lub teeb los ntawm kev siv cov khoom ntawm semiconductors-kev sib yuav ntawm lub cev sib yuav thiab kev hloov kho niaj hnub no! 💡