LED cov khoom siv dav siv hauv peb lub neej, xws li teeb pom kev zoo, vaj huam sib luag vaj huam sib luag, cov khoom siv kho mob, thiab lwm yam. Yog li dab tsi yog txoj hauv kev ua haujlwm ntawm LED cov khoom? Tom ntej no, cia peb ua raws li tus editor ntawm YONGS LED zaub kom luv luv to taub nws ua haujlwm li cas?
Zoo li cov diodes zoo tib yam, lub teeb-emitting diodes muaj PN hlws ris thiab kuj muaj unidirectional conductivity. Thaum ib qho hluav taws xob rau pem hauv ntej yog siv rau lub teeb-emitting diode, lub qhov txhaj tshuaj los ntawm thaj tsam P mus rau thaj tsam N thiab cov hluav taws xob txhaj los ntawm thaj tsam N mus rau thaj tsam P yog feem cuam tshuam nrog cov hluav taws xob hauv cheeb tsam N thiab qhov khoob khoob. nyob rau thaj tsam P hauv ob peb microns ze ntawm PN kev sib tshuam. Lub qhov recombination, ua rau spontaneous emission ntawm fluorescence. Lub zog lub xeev ntawm electrons thiab qhov nyob rau hauv cov khoom siv semiconductor sib txawv. Thaum cov hluav taws xob thiab qhov sib xyaw ua ke, lub zog tso tawm txawv me ntsis, lub zog tso tawm ntau dua, qhov luv lub wavelength ntawm lub teeb tawm. Feem ntau siv yog diodes uas emit liab, ntsuab los yog daj teeb. Qhov rov qab tawg voltage ntawm lub teeb-emitting diode yog ntau tshaj 5 volts. Nws cov volt-ampere yam ntxwv nkhaus yog qhov khov heev, thiab tam sim no limiting resistor yuav tsum tau txuas nrog hauv series los tswj tam sim no los ntawm diode.
Lub hauv paus tseem ceeb ntawm lub teeb-emitting diode yog wafer tsim los ntawm P-hom semiconductors thiab N-hom semiconductors, thiab muaj cov txheej txheem hloov pauv ntawm P-hom semiconductors thiab N-hom semiconductors, uas yog hu ua PN junction. Nyob rau hauv PN kev sib tshuam ntawm qee cov khoom siv semiconductor, thaum cov neeg nqa khoom noj tsawg tau sib txuas nrog cov neeg nqa khoom feem ntau, lub zog ntau dhau raug tso tawm hauv daim ntawv ntawm lub teeb, yog li ncaj qha hloov hluav taws xob rau hauv lub teeb lub zog. Thaum qhov hluav taws xob rov qab siv rau PN kev sib tshuam, nws nyuaj rau cov neeg nqa khoom tsawg los txhaj, yog li nws tsis tawm lub teeb. Thaum nws nyob rau hauv lub xeev ua hauj lwm pem hauv ntej (uas yog, ib tug pem hauv ntej voltage yog siv rau ob hnub), thaum lub tam sim no ntws los ntawm lub LED anode mus rau cathode, lub semiconductor siv lead ua emits lub teeb ntawm txawv xim ntawm ultraviolet mus infrared. Qhov kev siv ntawm lub teeb muaj feem xyuam rau qhov tam sim no.
