He aha ke LED?

Ua hoʻomaopopo ka poʻe i ka ʻike kumu e hiki ai i nā mea semiconductor ke hana i ka māmā 50 mau makahiki i hala.I ka makahiki 1962, ua hoʻomohala ʻo Nick Holonyak Jr. o General Electric Company i ka hoʻohana pono mua ʻana o nā diodes māmā ʻike.

ʻO LED ka pōkole o ka English light emitting diode. no laila he maikaʻi ka hana seismic o ka LED.

Manaʻo ka ʻikepili nui AIOT ua hoʻohana mua ʻia nā LED ma ke ʻano he kumu kukui hōʻike no nā mea kani a me nā mika, a ma hope o nā LED o nā kala kukui like ʻole i hoʻohana nui ʻia i nā kukui hōʻailona kaʻa a me nā pale hōʻike ākea nui, i hoʻopuka maikaʻi i nā pono waiwai a me ka pilikanaka.E lawe i ke kukui uila ʻulaʻula 12 iniha i laʻana.Ma ʻAmelika Hui Pū ʻIa, ua hoʻohana mua ʻia kahi kukui kukui 140-watt i ke ola lōʻihi, e hana ana i 2000 lumens o ke kukui keʻokeʻo.Ma hope o ka hele ʻana i ka kānana ʻulaʻula, ʻo 90% ka nalowale o ke kukui, waiho wale i 200 lumens o ke kukui ʻulaʻula.I ke kukui i hoʻolālā hou ʻia, hoʻohana ka hui i nā kumu kukui LED ʻulaʻula 18, me nā poho kaapuni, ka huina o 14 watts o ka hoʻohana ʻana i ka mana, hiki ke hana i ka hopena māmā like.ʻO nā kukui hōʻailona automotive kekahi kahua koʻikoʻi o nā noi kumu kukui LED.

Kumu o LED

ʻO LED (Light Emitting Diode), he mea hana semiconductor paʻa i hiki ke hoʻololi pololei i ka uila i mālamalama.ʻO ka puʻuwai o ka LED he puʻupuʻu semiconductor, hoʻopili ʻia kekahi ʻaoʻao o ka chip i ke kākoʻo, ʻo kekahi ʻaoʻao ka pole maikaʻi ʻole, a ʻo kekahi ʻaoʻao e pili ana i ka pou maikaʻi o ka lako mana, i hoʻopili ʻia ka chip holoʻokoʻa. e ka epoxy resin.Hoʻokumu ʻia ka wafer semiconductor i ʻelua ʻāpana, hoʻokahi ʻāpana he semiconductor P-type, kahi e noho aliʻi ai nā lua, a ʻo kekahi ʻaoʻao he semiconductor N-type, ʻo ia ka nui o nā electrons.

Akā ke hoʻohui ʻia kēia mau semiconductor ʻelua, ua hoʻokumu ʻia kahi "PN junction" ma waena o lākou.Ke hana ka mea i kēia manawa ma ka chip ma o ka uea, e hoʻokuʻu ʻia nā electrons i ka wahi P, kahi e hui hou ai nā electrons a me nā lua, a laila emit i ka ikehu ma ke ʻano o nā photon.ʻO kēia ke kumu o ka hoʻokuʻu kukui LED.ʻO ka lōʻihi o ka nalu o ka mālamalama ke kala o ke kukui, i hoʻoholo ʻia e ka mea i hana i ka "PN junction".