mfundo yowunikira yoyera ya LED
Ma LED oyera ndi njira yokhayo yopezera kuyatsa kwa semiconductor. LED yoyera si kuwala kwa monochromatic, ndipo palibe kuwala koyera mumtundu wa kuwala kowonekera. Malinga ndi kafukufuku wa anthu wokhudza kuwala kooneka, kuwala koyera komwe kungaoneke ndi maso a munthu kungapangidwe mwa kusakaniza mitundu iwiri kapena kuposapo ya kuwala. Pano pali njira zitatu zopezera magwero ounikira a LED oyera.
(1)Blue LED + phosphors yamitundu yosiyanasiyana:
LED yoyera yopangidwa ndi phosphor yachikasu yokutidwa ndi ma LED a buluu. Kuwala kwachikasu kopangidwa ndi phosphor kumakhala kokondwa ndipo kuwala kwabuluu koyambirira kunakondwera. Zowonjezera ndi kutulutsa kuwala koyera. Ndikothekanso kupeza kuwala koyera mwa kuphatikiza kuwala kobiriwira ndi kuwala kofiira kopangidwa ndi buluu LED chip ndi phosphor, ndi mtundu kupereka katundu ndi zabwino, koma phosphor kutembenuka mphamvu ntchito njira imeneyi ndi otsika, makamaka wofiira. phosphor.
Pakalipano, teknoloji yopangira ma LED yoyera yogwiritsira ntchito buluu ya LED yokhala ndi phosphor yachikasu ndiyokhwima, koma vuto la kufanana, kutentha kwamtundu wapamwamba ndi mtundu wochepa woperekera mtundu sungathe kuthetsedwa.
(2)Ultraviolet kapena violet LED + RGB phosphor:
Mfundo yopangira kuwala koyera ndi ultraviolet kapena violet (300-400nm) LED ndi RGB phosphor ndi yofanana ndi nyali ya fulorosenti, koma yoposa mphamvu ya nyali ya fulorosenti, kutembenuka kofiirira kwa LED The coefficient imatha kufika ku 0.8, ndi kutembenuka kwa quantum kwa aliyense. phosphor yamtundu imatha kufika 0.9.
Njira yogwiritsira ntchito violet LED kuti musangalatse maphosphor atatu oyambirira kapena multicolor kuti apange kuwala kwamitundu yambiri ndikusakanikirana ndi kuwala koyera kumapereka mitundu yabwinoko, koma palinso mavuto. Phosphor wofiira ndi phosphor wobiriwira nthawi zambiri amakhala sulfide, ndipo kukhazikika kwa mpweya kumakhala koyipa. Kuwala kowala ndi kwakukulu.
(3)Ma RGB atatu amtundu wa LED amapanga kuwala koyera:
Njirayi imaphatikiza mitundu itatu ya tchipisi ta LED zobiriwira, zofiira ndi buluu, ndipo nthawi yomweyo zimapatsa mphamvu, kenako zimasakaniza kuwala kobiriwira, kuwala kofiira ndi kuwala kwa buluu kukhala koyera molingana ndi chiŵerengero china. Chiyerekezo cha zobiriwira, zofiira, ndi buluu nthawi zambiri ndi 6:3:1. Njira yolongedza mwachindunji ma RG.B ma LED amitundu itatu mu ma LED oyera amakhala ndi magwiridwe antchito abwino kwambiri a kuwala koyera, komanso kuwala koyera koyera kumakhalanso kokwera chifukwa cha index yowonetsa mitundu yayikulu.
Chifukwa cha kutentha kwamitundu yosiyanasiyana ndi index yoperekera mitundu yomwe imafunikira pakuphatikizika kwa kuwala koyera, zofunikira za lumen za ma LED amitundu yoyera ndizosiyananso. Komabe, vuto lalikulu laukadaulo la njirayi ndikuwongolera kutembenuka kwamagetsi kwa ma LED obiriwira ndikuchepetsa ndalama.