A daminɛ na, LEDw tun bɛ kɛ taamasiyɛn yeelenw ye minɛnw ni mɛtɛrɛw kɔnɔ. Kɔfɛ, LED kulɛri suguya caman kɛra baarakɛminɛn ye kosɛbɛ sirabakan-minɛnw na ani yɔrɔba-yɔrɔ jiralanw na, o kɛra sababu ye ka nafa caman lase sɔrɔko ni sigidako ma. Misali la, Ameriki jamana na, sirabakan-minɛn bilenman min janya ye santimɛtɛrɛ 12{1} ye, a daminɛ na, a tun bɛ baara kɛ ni anpulu ye min bɛ mɛn-wati 140 na, a tɛ baara kɛ kosɛbɛ, k’a kɛ a yeelenbɔlan ye, ka yeelen finman limɛ 2000 bɔ. Tɛmɛnen kɔ filɛri bilenman dɔ fɛ, yeelen 90% tununna, ka yeelen bilenman 200 dɔrɔn to yen. A ka yeelen kura dilannen kɔnɔ, a ye LED bilenman 18 kɛ, minnu bɛ watti 14 dɔrɔn de ta ni sɛrɛkili bɔnɛw sen bɛ o la, walasa ka yeelenbɔcogo kelen in bɔ.
Mobili taamasiyɛn yeelenw ye baarakɛcogo nafama wɛrɛ ye LED yeelenbɔlanw na. San 1987, n ka jamana y’a daminɛ ka frein lanpanw bila mobili kan minnu bɛ wuli sanfɛ-. K’a sababu kɛ LEDw ka jaabi teliya ye (nanosekɔndi hakɛ), mobili nataw bolibagaw bɛ se ka ladɔnniya bolifɛnw bolicogo la ka kɔn o ɲɛ, o bɛ dɔ bɔ kɔfɛ-dakunw ka ɲɔgɔnkanu la.
Ka fara o kan, LED yeelenw bɛ kɛ kɛnɛma kulɛri bilenman, wuluwulu ani bulu dafalen-kulu jiralanw na, keychain-style mini flashlights, ani foro wɛrɛw la.
LED finmanw: Ni yeelen caman bɛ kɛ, yeelenbɔlan finmanw de ka di kosɛbɛ. LED finmanw dabɔra ka ɲɛ san 1998. O LEDw bɛ dilan ni GaN puce ni yttrium aluminium garnet (YAG) sirili ye ɲɔgɔn na.
GaN puce bɛ yeelen bulu bɔ (λp=465nm, Wd=30nm). YAG fosiforo bɛ Ce3+- min kɔnɔ, n’a bɛ sɔgɔsɔgɔ funteni caman na, o bɛ yeelen jɛman bɔ ni a lawulilen don nin yeelen bulu in fɛ, a janya kuncɛlen ye 550nm ye. LED bulu substrat bɛ sigi daga-cogo la min bɛ yeelen bɔ, ka datugu ni resin finman ye min ɲagaminen don YAG la, a janya bɛ se 200-500nm ma. LED substrat bɛ yeelen bulu min bɔ, o yɔrɔ dɔ bɛ minɛ fosiforo fɛ, ka sɔrɔ yeelen bulu tɔ bɛ ɲagami ni yeelen jɛman ye min bɛ bɔ fosiforo fɛ walasa ka yeelen finman bɔ. InGaN/YAG LED finmanw kama, ni YAG fosiforo ka kemikaliya caman cili ye ani ka fosiforo lamini janya ladilan, yeelen finman kulɛri suguya caman bɛ se ka sɔrɔ minnu kulɛri funteni bɛ daminɛ 3500-10000K la.
Tablo 1 bɛ LED finman suguya minnu bɛ sɔrɔ sisan ani u yeelen-bɔcogo sariyaw jira. Tablo in b’a jira fana ko LED finman yeelenbɔlan suguya dɔw bɛ u jigi da fosiforo naani kan: kulɛri fɔlɔ saba-fosiforo minnu man ca-dugukolo bilen, wuluwulu ani bulu-ani fosiforo jɛman min bɛ ni garnet jɔcogo ye. LED saba-wavelength, minnu bɛ baara kɛ ni puce ultraviolet inorganiques ye ni RGB phosphores ye walasa ka LED finmanw datugu, a jirala ko u bɛna se ka jago kɛ. Nka, nin fosiforo kulɛri fɔlɔ saba ninnu fɛnɲɛnamafagalanw hakɛ n’u sabatili wajibiyalenw ka dɔgɔ kosɛbɛ, wa u baara kɛrɛnkɛrɛnnenw bɛ ɲinini na hali bi.
Sisan, jagofɛn fɔlɔ min bɛ sɔrɔ, o ye LED bulu ye min bɛ kɛ ni puce kelen-puce ye ni YAG fosifɔri jɛman ye, o bɛ yeelenbɔcogo ɲuman sɔrɔ min bɛ se lumen 25/watt ma. YAG bɛ na ni a fanba ye Japon Nichia Corporation fɛ, a sɔngɔ bɛ se 2000 yuan/kg ma. Sugu filanan ye LED finmanw ye minnu dilannen don Japon Sumitomo Electric Industries fɛ ni ZnSe ye k’a kɛ fɛn ye, nka u yeelenbɔcogo ka dɔgɔn.
