Da farko, ana amfani da LEDs azaman fitilun nuni a cikin kayan aiki da mita. Daga baya, an yi amfani da fitilu masu launi daban-daban a cikin fitilun zirga-zirga da manyan wuraren nunin wurare, suna samar da fa'idodin tattalin arziki da zamantakewa. Misali, fitilar jan wuta mai inci 12 - a {asar Amirka, ta yi amfani da dogon lokaci -, }arfin wutar lantarki mai }arancin watt 140 a matsayin tushen haskensa, yana samar da haske mai haske 2000. Bayan wucewa ta cikin jan tace, kashi 90% na hasken ya ɓace, ya bar 200 lumen na haske mai ja. A cikin sabon hasken da aka ƙera, an yi amfani da LEDs ja 18, yana cinye watts 14 kawai ciki har da asarar da'ira, don samar da ingantaccen haske iri ɗaya.
Fitilar siginar mota wani yanki ne mai mahimmancin aikace-aikace don tushen hasken LED. A cikin 1987, ƙasata ta fara sanya manyan fitilun birki - akan motoci. Saboda saurin amsawa na LEDs (matakin nanosecond), ana iya sanar da direbobin ababen hawa yanayin tuki a baya, yana rage haɗuwar baya{4}}.
Bugu da kari, ana amfani da fitilun LED a waje ja, kore, da shudi cikakke{0}}allon nunin launi, sarkar maɓalli{1}}aramin fitilolin walƙiya, da sauran filayen.
Farin LEDs: Don hasken gabaɗaya, fararen hasken hasken sun fi so. An sami nasarar ƙera fararen ledoji a cikin 1998. Ana yin waɗannan LEDs ta hanyar haɗa guntu na GaN da yttrium aluminum garnet (YAG) tare.
Guntuwar GaN tana fitar da haske shuɗi (λp=465nm, Wd=30nm). Ce{3} mai dauke da YAG phosphor, wanda aka rarrabu a yanayin zafi mai yawa, yana fitar da hasken rawaya lokacin farin ciki da wannan hasken shudi, tare da tsayin tsayin 550nm. Ana saka madaidaicin LED mai shuɗi a cikin kwano{6}}mai siffa mai kyalli kuma an lulluɓe shi da siririn lefen resin gauraye da YAG, kauri kusan 200-500nm. Wani bangare na hasken shudin da ke fitar da ma'aunin LED yana dauke da phosphor, yayin da sauran hasken shudin ya hade da hasken rawaya da phosphor ke fitarwa don samar da farin haske. Don InGaN / YAG farin LEDs, ta hanyar canza yanayin sinadarai na YAG phosphor da daidaita kauri na Layer phosphor, ana iya samun launuka daban-daban na farin haske tare da yanayin launi daga 3500-10000K.
Tebur 1 ya lissafa nau'ikan fararen ledojin da ake da su a halin yanzu da haskensu{1}}asashen da ke fitar da su. Teburin ya kuma nuna cewa wasu nau'ikan hasken wuta na LED sun dogara da phosphor huɗu: launuka na farko guda uku -rare-jajayen duniya, kore, da shuɗi phosphor{5} da kuma rawaya phosphor mai tsarin garnet. LEDs masu tsayi uku -, ta amfani da guntuwar ultraviolet inorganic tare da RGB phosphor don sanya farin LEDs, ana tsammanin samun damar kasuwanci. Koyaya, girman barbashi da buƙatun kwanciyar hankali na waɗannan nau'ikan phosphor masu launi na farko kaɗan ne, kuma takamaiman aikace-aikacen su har yanzu suna ƙarƙashin bincike.
A halin yanzu, samfurin farko na kasuwanci shine shuɗi ɗaya - guntu LED tare da YAG rawaya phosphor, yana samun ingantaccen ingantaccen haske na kusan 25 lumens/watt. YAG galibi ana shigo da shi ne daga Kamfanin Nichia na Japan, farashinsa a kusan yuan 2000/kg. Nau'in na biyu fararen LEDs ne waɗanda Sumitomo Electric Industries na Japan suka haɓaka ta amfani da ZnSe azaman kayan, amma tare da ƙarancin haske.
