Nkhani

Kodi LED ndi chiyani?

LED imayimira "Light Emitting Diode." Ndi chipangizo cha semiconductor chomwe chimatulutsa kuwala pamene mphamvu yamagetsi ikudutsamo. Ma LED amagwiritsidwa ntchito pazinthu zosiyanasiyana, kuphatikizapo kuyatsa, zowonetsera, zizindikiro, ndi zina. Amadziwika ndi mphamvu zawo zamagetsi, kulimba, komanso moyo wautali poyerekeza ndi mababu achikhalidwe kapena mababu a fulorosenti. Ma LED amabwera amitundu yosiyanasiyana ndipo amatha kugwiritsidwa ntchito pazinthu zosiyanasiyana, kuchokera ku nyali zosavuta zowonetsera mpaka zowonetsera zamakono zamakono ndi zowunikira.

Mfundo ya Kuunikira kwa LED

Pamene ma elekitironi ndi mabowo mu mphambano ya PN ya diode-emitting diode akuphatikizananso, ma elekitironi amasintha kuchoka pamlingo wapamwamba kupita ku mphamvu yochepa, ndipo ma elekitironi amatulutsa mphamvu zochulukirapo monga ma photon otulutsa (mafunde amagetsi), zomwe zimapangitsa electroluminescence. Mtundu wa kuwala umagwirizana ndi zinthu zakuthupi zomwe zimapanga maziko ake. Zinthu zazikuluzikulu monga gallium arsenide diode imatulutsa kuwala kofiira, gallium phosphide diode imatulutsa kuwala kobiriwira, silicon carbide diode imatulutsa kuwala kwachikasu, ndipo gallium nitride diode imatulutsa kuwala kwabuluu.

Kuyerekeza kochokera

LED: kutembenuka kwamphamvu kwambiri kwamagetsi (pafupifupi 60%), obiriwira komanso ochezeka, moyo wautali (mpaka maola 100,000), magetsi otsika (pafupifupi 3V), osataya moyo pambuyo posintha mobwerezabwereza, kukula kochepa, m'badwo wotentha wochepa. , yowala kwambiri, yamphamvu komanso yolimba, Yosavuta kuyimba, mitundu yosiyanasiyana, mtengo wokhazikika komanso wokhazikika, osachedwetsa kuyambitsa.
Nyali ya incandescent: kutembenuka kwa electro-optical otsika (pafupifupi 10%), moyo waufupi (pafupifupi maola 1000), kutentha kwakukulu, mtundu umodzi ndi kutentha kwa mtundu wochepa.
Nyali za fluorescent: kutembenuka kwamagetsi otsika kwambiri (pafupifupi 30%), zowononga chilengedwe (zokhala ndi zinthu zovulaza monga mercury, pafupifupi 3.5-5mg/unit), kuwala kosasinthika (magetsi otsika sangathe kuyatsa), radiation ya ultraviolet, chodabwitsa, kuyambika kwapang'onopang'ono Pang'onopang'ono, mtengo wa zinthu zosapezeka padziko lapansi ukuwonjezeka, kusinthasintha mobwerezabwereza kumakhudza nthawi ya moyo, ndipo voliyumu ndi yayikulu. Nyali zotulutsa mpweya wothamanga kwambiri: zimawononga mphamvu zambiri, ndizosatetezeka kugwiritsa ntchito, zimakhala zazifupi. moyo wautali, ndikukhala ndi mavuto otaya kutentha. Amagwiritsidwa ntchito kwambiri pakuwunikira panja.

Ubwino wa LED

LED ndi kachipangizo kakang'ono kwambiri kamene kamakhala mu epoxy resin, kotero ndi kakang'ono komanso kopepuka. Nthawi zambiri, voteji yogwira ntchito ya LED ndi 2-3.6V, yomwe ikugwira ntchito ndi 0.02-0.03A, ndipo kugwiritsa ntchito mphamvu nthawi zambiri sikuposa
0.1W. Pansi pamagetsi okhazikika komanso oyenera komanso momwe amagwirira ntchito pano, moyo wautumiki wa ma LED utha kukhala maola 100,000.
LED imagwiritsa ntchito ukadaulo wozizira wa luminescence, womwe umatulutsa kutentha kochepa kwambiri kuposa zowunikira wamba zamphamvu yomweyo. Ma LED amapangidwa ndi zinthu zopanda poizoni, mosiyana ndi nyali za fulorosenti zomwe zimakhala ndi mercury, zomwe zingayambitse kuipitsa. Nthawi yomweyo, ma LED amathanso kusinthidwa ndikugwiritsidwanso ntchito.

Kugwiritsa ntchito LED

Pamene ukadaulo wa LED ukupitilira kukula ndikukula mwachangu, ma LED ochulukirachulukira amawonekera m'moyo wathu watsiku ndi tsiku. Ma LED amagwiritsidwa ntchito kwambiri pazowonetsera za LED, magetsi apamsewu, magetsi amagalimoto, magwero owunikira, zokongoletsa zowunikira, zowunikira za LCD, ndi zina zambiri.

Kupanga kwa LED

LED ndi chip-emitting chip, bulaketi ndi mawaya omangidwa mu epoxy resin. Ndi yopepuka, yopanda poizoni ndipo ili ndi kukana kugwedezeka kwabwino. LED ili ndi mawonekedwe a njira imodzi, ndipo mphamvu yobwerera ikakwera kwambiri, imayambitsa kuwonongeka kwa LED. Kapangidwe kake kakakulu kakuwonetsedwa pachithunzichi: