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LED ndi chiyani?

Posted on by lisc

Onaninso diode laser.

Diode yotulutsa kuwala (LED) ndi chida cha semiconductor chomwe chimatulutsa kuwala kowonekera pamene magetsi akudutsamo. Kuwala sikukuwala kwenikweni, koma m'ma LED ambiri kumakhala kozungulira, komwe kumachitika kamodzi kokha. Zomwe zimachokera ku LED zimatha kukhala zofiira (pamtunda wa pafupifupi nanometer 700) mpaka buluu-violet (pafupifupi ma nanometer 400). Ma LED ena amatulutsa mphamvu ya infrared (IR) (830 nanometers kapena kupitilira apo); chipangizo chotere chimadziwika kuti infoderedwetsa wozungulira diode (IRED).

LED kapena IRED imakhala ndi zinthu ziwiri za zinthu zoyambitsidwa zomwe zimatchedwa P-mtundu semiconductors ndi N-mtundu semiconductors. Zinthu ziwirizi zimayikidwa polumikizana mwachindunji, ndikupanga dera lotchedwa Mgwirizano wa PN. Pachifukwa ichi, LED kapena IRED ikufanana ndi mitundu ina ya diode, koma pali kusiyana kwakukulu. LED kapena IRED ili ndi phukusi lowonekera, lolola mphamvu yowoneka kapena IR kudutsa. Komanso, LED kapena IRED ili ndi dera lalikulu la PN-junction lomwe mawonekedwe ake amagwirizana ndi ntchito.

Ubwino wa ma LED ndi ma IRED, poyerekeza ndi zida zowunikira komanso ma fluorescent, ndizophatikiza:

  • Kufunika kochepa kwamphamvuMitundu yambiri imatha kugwiritsidwa ntchito ndi magetsi a batri.

  • Kuchita bwino kwambiri: Mphamvu zambiri zoperekedwa ku LED kapena IRED zimasinthidwa kukhala ma radiation mwanjira yomwe ikufunayo, yopanga kutentha kochepa.

  • Moyo wautali: Ikayikidwa bwino, LED kapena IRED imatha kugwira ntchito kwazaka zambiri.

Ntchito zambiri zimaphatikizapo:

  • Zoyimira: Izi zitha kukhala zigawo ziwiri (ie, pa / off), bar-graph, kapena zilembo zamakalata.

  • LCD kuwunika: Ma LED oyera mwapadera amagwiritsidwa ntchito pazowoneka bwino zapakompyuta.

  • Kufalitsa kwa Fiber Optic: Kuchepetsa kusinthasintha kwa mawu kumalola kulumikizana kwamitundu yonse kulumikizana ndi phokoso lochepa, kumapangitsa kuthamanga kwambiri komanso kulondola.

  • Kuwongolera kwakutali: Zosangalatsa zakunyumba zambiri "zakutali" zimagwiritsa ntchito ma IRED kuti atumize zidziwitso ku chipinda chachikulu.

  • Zojambulajambula: Masiteti pamagetsi amagetsi amatha kulumikizidwa limodzi popanda kuchitirana zosafunikira.

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