He aha ka LED?

E ʻike pū i ka diode laser.

ʻO kahi diode-emitting light (LED) kahi mea semiconductor e hoʻopuka i ke kukui i ʻike ʻia ke hele ka uila i loko. ʻAʻole mālamalama ka mālamalama, akā i ka hapanui o nā LED he monochromatic ia, e hana ʻia ma ka lōʻihi hoʻokahi nalu. Hiki ke puka mai kahi LED mai ka ʻulaʻula (ma kahi nalu o kahi o 700 nanometers) a i ka polū-lila (ma kahi o 400 nanometers). Kuhi kekahi mau LED i ka ikehu infrared (IR) (830 nanometers a ʻoi aku paha); ʻike ʻia kēlā meahana me he neʻe diehae (IRED).

He ʻelua a ʻokoʻa paha kahi IRED i ʻelua mau ʻano hana i kāhea ʻia i kāhea ʻia ʻAno semiconductor P-typea me Semiconductor N-types e. Kii ʻia kēia mau mea ʻelua i loko o ka hoʻopili pono ʻana, ka hana ʻana i kahi ʻāina i kapa ʻia ʻo Nā kikowaena PN. I kēia ʻano, like ka LED a i ʻole IRED me nā ʻano diode ʻē aʻe, akā aia nā ʻokoʻa nui. Aia ka LED a i ʻole IRED i kahi pūʻolo mālamalama, e ʻae ana i ka ikehu ʻike a i ʻole IR e hele i loko. Eia kekahi, he wahi PN-pili nui ka LED a i ʻole IRED nona ka hoʻohālikelike ʻia i ka noi.

Loaʻa nā pōmaikaʻi o nā LED a me IRED, hoʻohālikelike ʻia me nā mea e ʻālamalama a me nā mea i hoʻomālamalama a me nā fluorescent.

• Pono haʻahaʻa haʻahaʻa: Hiki ke lawelawe ʻia ka nui o nā ʻano me nā lako uila.

• Loaʻa: ʻO ka hapa nui o ka mana i hāʻawi ʻia i kahi LED a i ʻole IRED e hoʻololi ʻia i ka radiation i ke ʻano i makemake ʻia, me ka hoʻoulu ʻia ʻana o ka wela.

• E ola lōʻihi: Ke hoʻonohonoho pono ʻia, hiki i kahi LED a i IRED ke hana i nā makahiki he mau makahiki.

Hoʻohui nā noi maʻamau:

• Nā kukui hōʻike: Hiki i kēia mau mokuʻāina ʻelua (ʻo ia hoʻi, ma ka make), bar-graph a i ʻole ka helu helu helu helu.

• ʻĀlamalama pan i LCD: Hoʻohana ʻia nā kukui keʻokeʻo keʻokeʻo i nā pālahalaha pālahalaha pālahalaha.

• Hoʻololi ka helu data optic: ʻO ka maʻalahi o ka modulation e ʻae i ka bandwith kamaʻilio ākea me ka walaʻau liʻiliʻi, e hopena i ka wikiwiki a me ka pololei.

• Ke kaohi mamao: ʻO ka hapa nui o nā "remotes" hoʻokipa home e hoʻohana i nā IRED e hoʻouna i ka ʻikepili i ka anakahi nui.

• ʻOihana hōʻaiho: Hiki ke hoʻopili ʻia nā wahi ma kahi ʻōnaehana uila me ka ʻole o kahi pilina makemake ʻole.