Template:POTD/2025-01-16
A light-emitting diode (LED) ndi gwero la kuwala lomwe limapangidwa ndi semiconductor ndipo limatulutsa kuwala pamene magetsi akuyenda kudzera mwa izo. Pamene magetsi akuyenda kudzera pa diode, yomwe imapangidwa ndi zipangizo ziwiri zosiyana za semiconductor, maelekitironi amatha kubwezeretsanso mabowo a maelekitironi, motero kumasula mphamvu mu mawonekedwe a ma photon. Zotsatira izi zimatchedwa electroluminescence. Mtundu wa kuwala umatsimikiziridwa ndi mphamvu yomwe imafunikira kuti maelekitironi adutse gawo la band gap la semiconductor. Kuwala koyera kumapezeka pogwiritsa ntchito ma semiconductor angapo kapena wosanjikiza wa phosphor wotulutsa kuwala pa chipangizo cha semiconductor. Ma LED oyambirira ogwiritsiridwa ntchito omwe adawonekera mu 1962 anatulutsa kuwala kochepa kwa infrared ndi kofiyira. Masiku ano, ma LED amakono amapezeka ndi mphamvu yayikulu mu mitundu yosiyanasiyana ya mawavelength omwe amawoneka, ultraviolet, komanso infrared. Chithunzi ichi chikuwonetsa mitundu itatu yosiyana ya 11×44 LED matrix lapel name tag display. Chithunzi chapamwamba chikuwonetsa pang'ono kuposa theka la chiwonetsero, chapakati chikuwonetsa ma LED pafupi ndi kuwala kwachilengedwe, ndipo chapansi chikuwonetsa ma LED akuwunikira kuwala kwawo kofiyira.Kujambula: Janke