Nyob rau xyoo 60s ntawm lub xyoo pua xeem, cov neeg ua haujlwm tshawb fawb thiab thev naus laus zis tau siv lub hauv paus ntsiab lus ntawm semiconductor PN hlws ris luminescence los tsim LED teeb-emitting diodes.Lub LED tsim thaum lub sij hawm ntawd siv GaASP, nws cov luminous xim yog liab.Tom qab ze li ntawm 30 xyoo ntawm txoj kev loj hlob, LED uas txhua leej txhua tus paub zoo tau muaj peev xwm emit liab, txiv kab ntxwv, daj, ntsuab, xiav thiab lwm yam xim teeb.Txawm li cas los xij, cov LED dawb rau teeb pom kev zoo tsuas yog tsim tom qab xyoo 2000, thiab cov neeg nyeem tau nkag mus rau cov dawb LED rau teeb pom kev zoo.Qhov ntxov tshaj plaws LED teeb qhov chaw ua los ntawm semiconductor PN junction luminescence txoj cai tau tawm thaum ntxov 60s ntawm lub xyoo pua 20th.
Cov khoom siv nyob rau lub sijhawm ntawd yog GaAsP, uas ci liab (λp = 650nm), thiab ntawm qhov tsav tam sim no ntawm 20 mA, lub luminous flux tsuas yog ob peb txhiab ntawm ib lub lumens, thiab qhov sib thooj luminous efficiency yog li ntawm 0.1 lumens ib watt. .Nyob rau hauv nruab nrab-70s, lub ntsiab nyob rau hauv thiab N tau qhia kom LEDs tsim lub teeb ntsuab (λp = 555nm), lub teeb daj (λp = 590nm) thiab txiv kab ntxwv lub teeb (λp = 610nm), thiab lub teeb efficiency kuj nce mus rau 1. lumen/watt.Los ntawm thaum ntxov 80s, GaAlAs LED teeb qhov chaw tshwm sim, ua rau cov liab LED teeb efficiency ncav cuag 10 lumens ib watt.Nyob rau hauv thaum ntxov 90s, ob yam khoom tshiab, GaAlInP, uas emits liab thiab daj lub teeb, thiab GaInN, uas emits ntsuab thiab xiav lub teeb, tau ntse tsim, uas zoo heev txhim kho lub teeb efficiency ntawm LED.Xyoo 2000, LED ua los ntawm yav dhau los ua tiav lub teeb pom kev zoo ntawm 100 lumens / watt hauv thaj chaw liab thiab txiv kab ntxwv (λp = 615nm), thaum LED ua los ntawm yav dhau los tuaj yeem ncav cuag 50 lumens / watt hauv thaj chaw ntsuab (λp = 530 nm).
Lub sij hawm xa tuaj: Nov-11-2022