I nā makahiki 60 o ke kenekulia i hala, ua hoʻohana nā limahana ʻepekema a me ka ʻenehana i ke kumu o ka luminescence semiconductor PN junction luminescence e hoʻomohala i nā diodes kukui LED.Ua hoʻomohala ka LED i kēlā manawa i hoʻohana iā GaASP, ʻulaʻula kona kala kukui.Ma hope o 30 mau makahiki o ka hoʻomohala ʻana, ua hiki i ka LED i kamaʻāina loa i nā mea a pau ke hoʻopuka i nā kukui ʻulaʻula, ʻalani, melemele, ʻōmaʻomaʻo, uliuli a me nā kukui kala ʻē aʻe.Eia naʻe, ua hoʻomohala wale ʻia ka LED keʻokeʻo no ke kukui ma hope o 2000, a ua hoʻolauna ʻia ka mea heluhelu i ka LED keʻokeʻo no ke kukui.ʻO ke kumu kukui LED mua loa i hana ʻia me ka semiconductor PN junction luminescence principle i puka mai i nā makahiki 60 mua o ke kenekulia 20.
ʻO ka mea i hoʻohana ʻia i kēlā manawa ʻo GaAsP, ka mea ʻulaʻula ʻulaʻula (λp = 650nm), a ma kahi kaʻa o 20 mA, ʻo ka flux kukui he mau kaukani wale nō o kahi lumens, a ʻo ka pono o ka luminous kūpono ma kahi o 0.1 lumens per watt. .I ka waena o 70s, ua hoʻokomo ʻia nā mea In a me N e hana i nā LED e hana i ke kukui ʻōmaʻomaʻo (λp=555nm), ke kukui melemele (λp=590nm) a me ke kukui ʻalani (λp=610nm), a ua hoʻonui ʻia ka pono kukui i 1 lumen/watt.Ma nā makahiki 80 mua, ua ʻike ʻia ke kumu kukui LED GaAlAs, e hana ana i ka pono kukui LED ʻulaʻula a hiki i 10 lumens per watt.I ka 90s mua, ua hoʻomohala maikaʻi ʻia ʻelua mau mea hou, ʻo GaAlInP, ka mea e hoʻopuka ana i ke kukui ʻulaʻula a me ka melemele, a me GaInN, ka mea e hoʻopuka ana i ka ʻōmaʻomaʻo a me ka uliuli, i hoʻomaikaʻi maikaʻi ʻia i ka pono kukui o LED.I ka makahiki 2000, ua loaʻa i ka LED i hana ʻia o ka mea mua i ka māmā māmā o 100 lumens/watt i nā ʻāpana ʻulaʻula a me ka ʻalani (λp=615nm), ʻoiai ʻo ka LED i hana ʻia o ka hope hiki ke hiki i 50 lumens / watt ma ka ʻāpana ʻōmaʻomaʻo (λp= 530nm).
Ka manawa hoʻouna: Nov-11-2022