Vim LED lossis lub teeb emitting diode yog p-n hlws ris diode, peb tuaj yeem hais tias LED ua haujlwm raws li kev tsis ncaj ncees.
Vim li cas peb siv kev sib tw pem hauv ntej hauv LED?
Thaum Lub Teeb Emitting Diode (LED) yog rau pem hauv ntej kev sib tw, free electrons nyob rau hauv conduction band recombines nrog lub qhov nyob rau hauv lub valence band thiab tso tawm lub zog nyob rau hauv daim ntawv ntawm lub teeb. … Nyob rau hauv ib txwm p-n hlws ris diodes, silicon feem ntau yog siv vim nws tsis tshua rhiab rau qhov kub.
Yuav ua li cas thiaj ua tiav hauv LEDS?
Thaum lub diode yog kev ncaj ncees, electrons los ntawm semiconductors conduction band recombine nrog lub qhov los ntawm valence band tso tawm lub zog txaus los tsim photons uas emit ib monochromatic (ib xim) ntawm lub teeb. … Qhov no yog vim li cas lub teeb pom kev zoo li ci ntsa iab nyob saum lub LED.
Yuav ua li cas rau kev sib tw yog siv hauv diode?
Nyob rau hauv tus qauv diode, rau pem hauv ntej biasing tshwm sim thaum lub voltage hla ib diode tso cai rau lub ntuj ntws ntawm tam sim no, whereas rov qab biasing qhia ib tug voltage hla lub diode nyob rau hauv opposite direction.
Yuav ua li cas hom kev biasing yog siv rau photodiode LED?
Lub photodiode yog reverse biased rau kev khiav hauj lwm hauv photoconductive hom. Raws li lub photodiode nyob rau hauv qhov kev tsis ncaj ncees lawm qhov dav ntawm depletion txheej nce. Qhov no txo qhov kev sib tshuam capacitance thiab yog li lub sijhawm teb. Nyob rau hauv qhov tseeb, qhov kev tsis ncaj ncees thim rov qab ua rau lub sijhawm teb sai dua rau lub sijhawmphotodiode.
