Masiku ano LED yakhala gawo losafikirika m'moyo wathu. Lero, ndikukupatsani mwachidule chiyambi cha lingaliro, makhalidwe, ndi magulu.

Lingaliro la LED

LED (Light Emitting Diode) ndi chipangizo cha semiconductor cholimba chomwe chimasintha magetsi mwachindunji kukhala Light. Mtima wa LED ndi semiconductor chip, chomwe chimamangiriridwa ku scaffold, chomwe chimamangiriridwa ndi electrode yoyipa, ndipo china chimalumikizidwa ku positive end ya magetsi, kotero kuti chip yonse imayikidwa mu epoxy resin.

Chipu ya semiconductor imapangidwa ndi magawo awiri, chimodzi mwa izo ndi semiconductor ya mtundu wa p, momwe mabowo amalamulira, ndipo china ndi semiconductor ya mtundu wa n, yomwe ma elekitironi amalamulira. Koma pamene ma semiconductor awiriwa alumikizidwa, "pn junction" imapangidwa pakati pawo. Pamene mphamvu yamagetsi ikugwiritsidwa ntchito ku chip kudzera mu waya, ma elekitironi amakankhidwira ku p-region, komwe amalumikizananso ndi dzenjelo ndikupereka mphamvu mu mawonekedwe a ma photon, momwe ma LED amawalira. Ndipo kutalika kwa kuwala, mtundu wa kuwala, kumatsimikiziridwa ndi zinthu zomwe zimapanga PN junction.

Makhalidwe a LED

Makhalidwe enieni a LED amatsimikizira kuti ndiye gwero labwino kwambiri la kuwala m'malo mwa gwero lakale la kuwala, lili ndi ntchito zosiyanasiyana.

• Voliyumu Yaing'ono

LED kwenikweni ndi chip kakang'ono kwambiri komwe kamasungidwa mu epoxy resin, kotero ndi kakang'ono kwambiri komanso kopepuka kwambiri.

-Kugwiritsa Ntchito Mphamvu Kochepa

Kugwiritsa ntchito mphamvu ya LED n'kochepa kwambiri, makamaka, magetsi ogwiritsira ntchito a LED ndi 2-3.6V.
Mphamvu yogwira ntchito ndi 0.02-0.03A.
Izi zikutanthauza kuti, imagwiritsa ntchito magetsi osapitirira 0.1W.

• Moyo Wautali wa Utumiki

Ndi mphamvu ndi magetsi oyenera, ma LED amatha kugwira ntchito mpaka maola 100,000.

• Kuwala Kwambiri ndi Kutentha Kochepa

• Chitetezo cha Zachilengedwe

Ma LED amapangidwa ndi zinthu zopanda poizoni, mosiyana ndi nyali za fluorescent, zomwe zimakhala ndi mercury ndipo zimayambitsa kuipitsa. Zingathenso kubwezeretsedwanso.

• Wamphamvu komanso Wolimba

Ma LED ali mkati mwa epoxy resin, yomwe ndi yolimba kuposa mababu ndi machubu a fluorescent. Palinso zinthu zopanda mphamvu mkati mwa nyali, zomwe zimapangitsa kuti ma LED asawonongeke.

Kugawa kwa LED

1, Malinga ndi chubu chotulutsa kuwalamtundumfundo

Malinga ndi mtundu wotulutsa kuwala wa chubu chotulutsa kuwala, ukhoza kugawidwa m'magulu ofiira, alanje, obiriwira (ndi achikasu wobiriwira, wobiriwira wamba ndi wobiriwira weniweni), abuluu ndi zina zotero.
Kuphatikiza apo, ma LED ena ali ndi tchipisi ta mitundu iwiri kapena itatu.
Malinga ndi mtundu wa kuwala komwe kumasakanikirana kapena kusasakanikirana ndi zobalalitsira, zamitundu kapena zopanda mtundu, mitundu yosiyanasiyana ya LED yomwe ili pamwambapa ingagawidwenso m'mitundu inayi yowonekera, yopanda mtundu, yowonekera, ndi yobalalitsira yopanda mtundu.
Ma diode otulutsa kuwala ndi ma diode otulutsa kuwala angagwiritsidwe ntchito ngati nyali zowonetsera.

2. Malinga ndi makhalidwe a kuwalapamwambaya chubu chotulutsa kuwala

Malinga ndi mawonekedwe a pamwamba pa chubu chotulutsa kuwala, chingagawidwe m'magulu awiri: nyali yozungulira, nyali ya sikweya, nyali yozungulira, chubu chotulutsa kuwala kwa nkhope, chubu cham'mbali ndi chubu chaching'ono choyikira pamwamba, ndi zina zotero.
Nyali yozungulira imagawidwa m'magulu awiri: Φ2mm, Φ4.4mm, Φ5mm, Φ8mm, Φ10mm ndi Φ20mm, ndi zina zotero.
Kawirikawiri zakunja zimalemba diode yotulutsa kuwala ya Φ3mm ngati T-1, φ5mm monga T-1 (3/4), ndiφ4.4mm monga T-1 (1/4).

3. Malinga ndikapangidwema diode otulutsa kuwala

Malinga ndi kapangidwe ka LED, pali epoxy encapsulation yonse, metal base epoxy encapsulation, ceramic base epoxy encapsulation ndi glass encapsulation.

4. Malinga ndimphamvu yowala komanso mphamvu yogwirira ntchito

Malinga ndi mphamvu yowala ndi mphamvu yogwira ntchito, mphamvu ya LED imagawidwa m'magawo awiri: kuwala kwa LED (mphamvu yowala ya 100mCD);
Kuwala kwa mphamvu pakati pa 10 ndi 100mCD kumatchedwa diode yowala kwambiri yotulutsa kuwala.
Mphamvu yogwira ntchito ya LED yonse ndi kuyambira pa mA khumi mpaka makumi awiri, pomwe mphamvu yogwira ntchito ya LED yochepa ili pansi pa 2mA (kuwala kwake kuli kofanana ndi kwa chubu wamba chotulutsa kuwala).
Kuwonjezera pa njira zogawa zomwe zili pamwambapa, palinso njira zogawa m'magulu malinga ndi zinthu za chip komanso ntchito yake.

Ted: Nkhani yotsatira ikunenanso za LED. Ndi chiyani? Chonde khalani tcheru.