Dab tsi yog LED?
Alight-emitting diode (LED) yog asemiconductorhom teeb ciuas emits teeb thaumtam sim nontws los ntawm nws.Hluav taws xobnyob rau hauv lub semiconductor recombine nroghluav taws xob qhov, tso zog nyob rau hauv daim ntawv ntawmphotonsCov. Cov xim ntawm lub teeb (sib haum rau lub zog ntawm cov duab hluav taws xob) txiav txim siab los ntawm lub zog xav tau rau hluav taws xob los hla qhovband kisntawm lub semiconductor.White lub teeb tau los ntawm kev siv ntau lub tshuab hluav taws xob lossis ntau txheej ntawm lub teeb hluav taws xob ntawm lub tshuab hluav taws xob.
Tshwm sim raws li cov khoom siv hluav taws xob tseeb hauv xyoo 1962, kev siv hluav taws xob ua ntej tshaj plaws yog kev tso tawm hluav taws xob tsawg tsawg ntawm infrared teeb.Infrared LEDs yog siv hauvchaw taws teeb-tswjkev ua voj voos, xws li cov siv nrog ntau yam ntawm cov neeg siv khoom siv hluav taws xob. Tus thawj pom-lub teeb pom kev LED pom ntawm qhov tsis tshua muaj zog thiab txwv rau liab. Cov LED niaj hnub no muaj nyob thoob plawspom tau,ultraviolet, thiabduab liab qabwavelengths, nrog lub teeb tso zis ntau dua.
Cov Ntxov LED thaum ntxov tau siv feem ntau los ua lub teeb taw qhia, hloov cov roj teeb me me, thiab hauvxya-ntu ntuCov. Cov kev tsim kho tsis ntev los no tau tsim cov teeb meem loj dawb lub teeb ci LED tsim nyog rau chav tsev thiab sab nraum zoov teeb pom kev zoo. LEDs tau coj mus rau cov teeb tsa tshiab thiab cov cim, thaum lawv qhov hloov pauv siab tseem ceeb nyob hauv kev sib txuas lus tshiab hauv tshuab.
