Taug kev los ntawm cov teeb pom kev zoo ntawm txhua lub khw muag khoom kho vajtse, thiab koj tuaj yeem dazzled tsis yog tsuas yog cov khoom siv ci ntsa iab xwb tab sis kuj muaj ntau cov kev xaiv uas koj tau nthuav tawm.
Ob peb ntawm koj xaiv muaj xws li incandescent, fluorescent thiab LED teeb. Ib qho ntawm cov khoom siv hluav taws xob siv hluav taws xob zoo tshaj plaws - lub teeb-emitting diodes, lossis LEDs, siv nees nkaum-tsib rau peb caug feem pua ntawm lub zog ntawm halogen incandescents lawv hloov. Lawv tsis muaj mercury, tsis tshua muaj kev tawg, thiab khav theeb lub neej ntev ntawm tsib caug txhiab teev - hauv lwm lo lus - ze li kaum plaub xyoos.
Hauv cov ntsiab lus yooj yim tshaj plaws, LED yog ib qho khoom siv semiconductor uas tawm lub teeb thaum muaj hluav taws xob dhau los ntawm nws. LEDs ua haujlwm ntawm lub hauv paus ntsiab lus ntawm electroluminescence. Cov txheej txheem no tuaj yeem piav qhia raws li qhov tshwm sim uas cov khoom siv tawm lub teeb thaum muaj hluav taws xob dhau los ntawm nws.
Lub hauv paus ntsiab lus ntawm electroluminescence tau pom nyob rau xyoo 1907 los ntawm Henry Joseph Round siv silicone carbide thiab lub npe hu ua cat's whisker detector (tsis yog ua los ntawm miv lub whisker). Tus neeg tsim khoom Askiv tau pom tias thaum qhov hluav taws xob tau siv rau silicon carbide siv lead ua, nws tawm lub teeb daj daj. Kev tshawb nrhiav ntau dua thiab cov kev xav tau tshaj tawm tom qab luam tawm los ntawm Lavxias tus kws tshawb fawb Oleg Vladimirovich Losev hauv nws daim ntawv xyoo 1927 "Luminous Carborundum Ntes thiab Tshawb Pom Cov nyhuv thiab Oscillations nrog Crystals".
Ntau xyoo dhau los ua ntej qhov tseem ceeb tau ua tiav ntawm kev tshawb fawb lub teeb emitting diode. Nws tsis yog txog xyoo 1962 uas Gary Pittman thiab James Robert "Bob" Biard los ntawm Texas Instruments tau txais patent rau infrared LEDs. Thawj qhov pom spectrum LED yog tsim los ntawm General Electric engineer Nick Holonyak, Jr.
Xyoo 1972, ib tug qub tub ntxhais kawm tiav ntawm Holonyak - M. George Craford - tau tsim thawj lub teeb daj LED thiab nce los ntawm kaum npaug ntawm qhov ci ntawm cov xim liab thiab xim liab-txiv kab ntxwv. High brightness, high-efficiency LEDs tsis tau tsim kom txog rau thaum 1976, thaum TP Pearsall tsim lawv siv nws tshiab invented semiconductor cov ntaub ntawv. Shuji Nakamura ntawm Nichia Corporation tau ua thawj lub teeb xiav LED hauv xyoo 1979 tab sis nws kim heev rau kev lag luam siv txog xyoo 1994.
