LED (Chiedza Emitting Diode), chiedza emitting diode, yakasimba mamiriro semiconductor mudziyo unogona kushandura simba remagetsi kuita chiedza chinooneka. Inogona kushandura zvakananga magetsi kuva chiedza. Mwoyo we LED ndeye semiconductor chip. Imwe mugumo we chip inosungirirwa kune bhuraketi, imwe mugumo idanda risina kunaka, uye imwe mugumo yakabatanidzwa kune yakanaka danda remagetsi, kuitira kuti chip yose inoputirwa ne epoxy resin.
Iyo semiconductor chip inoumbwa nezvikamu zviviri. Chimwe chikamu iP-type semiconductor, umo makomba ari kutonga, uye imwe mugumo iN-mhando semiconductor, umo maerekitironi ari kutonga. Asi kana aya maviri semiconductors akabatana, PN junction inoumbwa pakati pavo. Kana ikozvino inobata pachipu kuburikidza newaya, maerekitironi anosundirwa kunzvimbo yeP, uko maerekitironi achasanganazve nemakomba, uye ipapo anoburitsa simba muchimiro chephotons. Iyi ndiyo musimboti wekubuda kwemwenje we LED. Urefu hwechiedza, ndiko kuti, ruvara rwechiedza, hunotarwa nezvinhu zvinoumba PN junction.
LED inogona kuburitsa zvakananga tsvuku, yero, yebhuruu, yegirini, yegirinhi, orenji, yepepuru uye chena mwenje.
Pakutanga, LED yakashandiswa sechiratidzo chechiedza chezviridzwa nemamita. Gare gare, ma LED akasiyana-siyana ane mavara akajeka akashandiswa zvakanyanya mumarobhoti uye nzvimbo huru yekuratidzira, achigadzira zvakanaka zvehupfumi uye zvemagariro. Tora 12 inch red traffic chiratidzo mwenje semuenzaniso. MuUnited States, mwenje we 140 watt incandescent ine hupenyu hurefu uye kushomeka kwechiedza chakaderera pakutanga yakashandiswa senzvimbo yemwenje, iyo yakaburitsa 2000 lumens yechiedza chichena. Mushure mekupfuura nemusefa dzvuku, kurasikirwa kwechiedza kuri 90%, kuchisiya chete mazana maviri lumens emwenje tsvuku. Mumwenje mutsva wakagadzirwa, Lumileds inoshandisa gumi nemasere matsvuku emwenje masosi, kusanganisira kurasikirwa kwedunhu. Iyo yakazara simba rekushandisa ndeye 14 watts, iyo inogona kuburitsa yakafanana inopenya maitiro. Motokari chiratidzo mwenje zvakare inzvimbo yakakosha ye LED mwenje sosi application.
Kuvhenekera kwese, vanhu vanoda mamwe machena machena masosi. Muna 1998, chena LED yakabudirira kugadzirwa. Iyi LED inogadzirwa nekurongedza GaN chip uye yttrium aluminium garnet (YAG) pamwechete. GaN chip inoburitsa mwenje weblue ( λ P = 465nm, Wd = 30nm), iyo YAG phosphor ine Ce3 + sintered patembiricha yepamusoro inoburitsa yero mwenje mushure mekunakidzwa nechiedza chebhuruu ichi, ine kukosha kwepamusoro kwe550n LED rambi m. Iyo yebhuruu LED substrate inoisirwa mundiro yakaumbwa inoratidzira mhango, yakafukidzwa nekatetepa resin yakasanganiswa neYAG, ingangoita 200-500nm. Chiedza chebhuruu kubva ku LED substrate chikamu chakabatwa ne phosphor, uye chimwe chikamu chechiedza chebhuruu chinosanganiswa neyero mwenje kubva kuphosphor kuwana chena mwenje.
YeInGaN/YAG chena LED, nekushandura kemikari yeYAG phosphor uye kugadzirisa ukobvu hwephosphor layer, marambi machena akasiyana ane tembiricha ye3500-10000K anogona kuwanikwa. Iyi nzira yekuwana mwenje chena kuburikidza nebhuruu LED ine chimiro chakareruka, mutengo wakaderera uye yakakwirira tekinoroji kukura, saka inoshandiswa zvakanyanya.
Nguva yekutumira: Jan-29-2024