Product Principple Of LED Teeb

LED (Lub Teeb Emitting Diode), lub teeb emitting diode, yog lub xeev cov khoom siv hluav taws xob uas tuaj yeem hloov hluav taws xob rau hauv lub teeb pom kev. Nws tuaj yeem hloov hluav taws xob ncaj qha rau hauv lub teeb. Lub plawv ntawm LED yog semiconductor nti. Ib qho kawg ntawm lub nti yog txuas nrog lub bracket, ib qho kawg yog tus ncej tsis zoo, thiab lwm qhov kawg yog txuas nrog tus ncej zoo ntawm lub hwj huam mov, kom tag nrho cov nti yog encapsulated los ntawm epoxy resin.

Lub semiconductor nti yog tsim los ntawm ob ntu. Ib feem yog P-hom semiconductor, nyob rau hauv uas lub qhov yog dominant, thiab lwm kawg yog ib tug N-hom semiconductor, nyob rau hauv uas electrons yog dominant. Tab sis thaum ob lub semiconductors txuas nrog, PN kev sib tshuam yog tsim los ntawm lawv. Thaum qhov tam sim no ua rau lub nti los ntawm cov hlau, cov electrons yuav raug thawb mus rau thaj tsam P, qhov twg cov electrons yuav rov ua dua nrog qhov, thiab tom qab ntawd tawm lub zog hauv daim ntawv ntawm photons. Qhov no yog lub hauv paus ntsiab lus ntawm LED teeb emission. Lub wavelength ntawm lub teeb, uas yog, xim ntawm lub teeb, yog txiav txim los ntawm cov khoom uas ua rau PN hlws ris.

LED tuaj yeem ncaj qha emit liab, daj, xiav, ntsuab, ntsuab, txiv kab ntxwv, ntshav thiab dawb lub teeb.

Thaum xub thawj, LED tau siv los ua qhov taw qhia lub teeb ntawm cov twj paj nruag thiab ntsuas. Tom qab ntawd, ntau lub teeb xim LEDs tau siv dav hauv cov teeb pom kev zoo thiab thaj chaw loj, ua rau muaj txiaj ntsig zoo ntawm kev lag luam thiab kev sib raug zoo. Siv 12 nti liab teeb liab teeb liab teeb ua piv txwv. Hauv Tebchaws Meskas, 140 watt incandescent teeb nrog lub neej ntev thiab kev ua haujlwm qis qis yog siv los ua lub teeb ci, uas ua rau 2000 lumens ntawm lub teeb dawb. Tom qab dhau los ntawm cov lim liab, lub teeb poob yog 90%, tsuas yog 200 lumens ntawm lub teeb liab. Nyob rau hauv lub teeb tsim tshiab, Lumileds siv 18 liab LED teeb qhov chaw, suav nrog kev poob hauv Circuit Court. Tag nrho lub zog noj yog 14 watts, uas tuaj yeem ua rau tib lub teeb pom kev zoo. Tsheb teeb liab teeb liab kuj yog ib qho tseem ceeb ntawm LED teeb qhov chaw thov.

Rau qhov teeb pom kev dav dav, tib neeg xav tau cov teeb pom kev dawb ntau dua. Xyoo 1998, LED dawb tau tsim tiav. LED no yog tsim los ntawm ntim GaN nti thiab yttrium aluminium garnet (YAG) ua ke. GaN nti emits xiav lub teeb (λ P = 465nm, Wd = 30nm), YAG phosphor uas muaj Ce3 + sintered ntawm qhov kub thiab txias emits daj lub teeb tom qab tau zoo siab los ntawm lub teeb xiav, nrog lub ncov nqi ntawm 550n LED teeb m. Lub teeb xiav LED substrate yog ntsia rau hauv lub tais zoo li lub ntsej muag lub ntsej muag, npog nrog ib txheej nyias ntawm cov cob sib xyaw nrog YAG, txog 200-500nm. Lub teeb xiav los ntawm LED substrate yog ib feem absorbed los ntawm phosphor, thiab lwm qhov ntawm lub teeb xiav yog tov nrog lub teeb daj los ntawm phosphor kom tau txais lub teeb dawb.

Rau InGaN / YAG dawb LED, los ntawm kev hloov cov tshuaj muaj pes tsawg leeg ntawm YAG phosphor thiab kho cov thickness ntawm phosphor txheej, ntau yam dawb teeb nrog xim kub ntawm 3500-10000K tuaj yeem tau. Txoj kev no tau txais lub teeb dawb los ntawm xiav LED muaj cov qauv yooj yim, tus nqi qis thiab kev siv tshuab siab, yog li nws tau siv dav.