Menene LED?

Mutane sun fahimci ainihin ilimin cewa kayan semiconductor na iya samar da haske shekaru 50 da suka wuce.A cikin 1962, Nick Holonyak Jr. na Kamfanin General Electric ya haɓaka aikace-aikacen farko na aikace-aikacen diode masu fitar da haske.

LED shine taƙaitaccen haske na diode na Ingilishi, tsarin sa na asali shine yanki na kayan lantarki na lantarki, wanda aka sanya shi a kan shiryayye mai jagora, sannan an rufe shi da resin epoxy a kusa, wato, m encapsulation, don haka yana iya kare waya ta ciki. don haka LED yana da kyakkyawan aikin girgizar ƙasa.

Babban bayanan AIOT sun yi imanin cewa da farko an yi amfani da LEDs a matsayin tushen hasken haske don kayan aiki da mita, kuma daga baya LEDs na launuka masu haske daban-daban an yi amfani da su sosai a cikin fitilun siginar zirga-zirga da manyan allon nunin yanki, wanda ya haifar da fa'idodin tattalin arziki da zamantakewa.Ɗauki fitilar ja mai inci 12 a matsayin misali.A {asar Amirka, an fara amfani da fitilar incandescent mai tsawon watt 140 watt a matsayin tushen haske, wanda ke samar da 2000 lumens na farin haske.Bayan wucewa ta cikin jan tace, asarar hasken shine 90%, ya bar 200 lumens na haske mai ja.A cikin sabuwar fitilun da aka kera, kamfanin yana amfani da maɓuɓɓugan haske na LED guda 18, gami da asarar da'ira, jimillar watts 14 na amfani da wutar lantarki, na iya haifar da tasirin haske iri ɗaya.Fitilar siginar mota kuma muhimmin filin aikace-aikacen tushen hasken LED ne.

Ka'idar LED

LED (Light Emitting Diode), na'ura ce mai ƙarfi mai ƙarfi wacce ke iya juyar da wutar lantarki kai tsaye zuwa haske.Zuciyar LED guntu ce ta semiconductor, ɗayan ƙarshen guntu an haɗa shi zuwa goyan baya, ƙarshen ɗaya shine madaidaicin sandar wuta, ɗayan ƙarshen kuma an haɗa shi da ingantacciyar sandar wutar lantarki, ta yadda duk guntu ɗin an rufe shi. ta hanyar resin epoxy.Semiconductor wafer yana kunshe ne da sassa biyu, bangare daya shine semiconductor nau'in P, wanda ramukan suka mamaye, daya karshen kuma shine semiconductor nau'in N, wanda galibi electrons ne.

Amma idan aka haɗa waɗannan semiconductor guda biyu, an samar da “junction PN” a tsakaninsu.Lokacin da na'urar ke aiki akan guntu ta hanyar waya, za a tura electrons zuwa yankin P, inda electrons da ramuka suka sake haɗuwa, sannan su fitar da makamashi ta hanyar photons.Wannan shine ka'idar fitar da hasken LED.Tsawon tsayin haske kuma shine launi na haske, wanda aka ƙaddara ta hanyar kayan da ke samar da "PN junction".