Namuhla, ngokuthuthuka okusheshayo kwama-LED, ama-LED anamandla amakhulu asebenzisa leli thuba.Njengamanje, inkinga enkulu yobuchwepheshe yokukhanyisa kwe-LED okunamandla amakhulu ukuchithwa kokushisa.Ukushisa okungekuhle kuholela emandleni okushayela e-LED nama-electrolytic capacitor.Sekuyibhodi elifushane lokuthuthukiswa okuqhubekayo kokukhanyisa kwe-LED.Isizathu sokuguga ngaphambi kwesikhathi komthombo wokukhanya we-LED.
Kuhlelo lwesibani olusebenzisa umthombo wokukhanya we-LED, ngoba umthombo wokukhanya we-LED usebenza ku-voltage ephansi (VF = 3.2V), isimo esisebenzayo samanje (IF=300-700mA), ngakho-ke ukushisa kubi kakhulu.Isikhala sezibani zendabuko sincane, futhi kunzima kurediyetha yendawo encane ukuthekelisa ukushisa ngokushesha.Naphezu kokwamukelwa kwezinhlelo ezihlukahlukene zokupholisa, imiphumela ayigculisi, ibe amalambu okukhanyisa i-LED inkinga ngaphandle kwesixazululo.
Okwamanje, ngemva kokuba umthombo wokukhanya we-LED uvuliwe, u-20% -30% wamandla kagesi uguqulwa ube amandla okukhanya, futhi cishe u-70% wamandla kagesi aguqulwa abe amandla ashisayo.Ngakho-ke, ubuchwepheshe obuyinhloko bomklamo wesakhiwo sesibani se-LED ukuthumela amandla amaningi okushisa ngokushesha ngangokunokwenzeka.Amandla okushisa adinga ukuchithwa ngokuqhutshwa kokushisa, i-convection yokushisa kanye nemisebe yokushisa.
Manje ake sihlaziye ukuthi yiziphi izici ezibangela ukuvela kwezinga lokushisa elihlangene le-LED:
1. Ukusebenza kahle kwangaphakathi kokubili akuphakeme.Uma i-electron ihlanganiswa nembobo, i-photon ayikwazi ukukhiqizwa ngo-100%, okuvame ukunciphisa izinga lokuhlanganisa kabusha umthwali wesifunda se-PN ngenxa "yokuvuza kwamanje".Izikhathi zamanje zokuvuza i-voltage ingamandla ale ngxenye.Okungukuthi, iguqulela ekushiseni, kodwa le ngxenye ayithathi ingxenye eyinhloko, ngoba ukusebenza kahle kwama-photons angaphakathi sekusondele ku-90%.
2. Awekho ama-photon akhiqizwe ngaphakathi angadubula ngaphandle kwe-chip, futhi ingxenye yesizathu esiyinhloko esenza lokhu ekugcineni kuguqulwe amandla okushisa ukuthi lokhu, okubizwa ngokuthi ukusebenza kahle kwe-quantum yangaphandle, cishe ku-30% kuphela, iningi lazo eliguqulelwa ukushisa.
Ngakho-ke, ukuchithwa kokushisa kuyisici esibalulekile esithinta amandla okukhanyisa amalambu e-LED.I-heat sink ingaxazulula inkinga yokushisa ukushisa kwezibani ze-LED zokukhanya okuphansi, kodwa isitsha sokushisa asikwazi ukuxazulula inkinga yokushisa ukushisa kwezibani zamandla aphezulu.
Izixazululo zokupholisa ze-LED:
Ukukhishwa kokushisa kwe-Led ikakhulukazi kuqala ezicini ezimbili: ukuchithwa kokushisa kwe-Led chip ngaphambi nangemuva kwephakheji kanye nokuchithwa kokushisa kwesibani se-Led.Ukukhishwa kokushisa kwe-LED kuhlobene kakhulu nenqubo yokukhetha i-substrate kanye nesifunda, ngoba noma iyiphi i-LED ingenza isibani, ngakho-ke ukushisa okukhiqizwa yi-chip ye-LED ekugcineni kuhlakazekile emoyeni ngokusebenzisa izindlu zesibani.Uma ukushisa kungahlakazwa kahle, umthamo wokushisa we-chip ye-LED uzoba mncane kakhulu, ngakho-ke uma ukushisa okuthile kunqwabelana, izinga lokushisa lokuxhuma le-chip lizokhula ngokushesha, futhi uma lisebenza ekushiseni okuphezulu isikhathi eside, ubude bempilo buzofinyezwa ngokushesha.
Ngokuvamile, ama-radiator angahlukaniswa abe ukupholisa okusebenzayo kanye nokupholisa okwenziwayo ngokuya ngendlela ukushisa okukhishwa ngayo kurediyetha.Ukukhipha ukushisa okungenzi lutho kuwukukhipha ngokwemvelo ukushisa komthombo wokushisa womthombo wokukhanya we-LED emoyeni ngokusebenzisa usinki wokushisa, futhi umphumela wokukhipha ukushisa ulingana nosayizi wosinki wokushisa.Ukupholisa okusebenzayo ukukhipha ngenkani ukushisa okukhishwa usinki wokushisa ngesisetshenziswa sokupholisa esinjengefeni.Ibonakala ngokusebenza kahle kokukhipha ukushisa okuphezulu kanye nobukhulu obuncane bedivayisi.Ukupholisa okusebenzayo kungahlukaniswa ngokupholisa umoya, ukupholisa uketshezi, ukupholisa amapayipi okushisa, ukupholisa kwe-semiconductor, ukupholisa ngamakhemikhali nokunye.
Ngokuvamile, ama-radiator apholile emoyeni kufanele akhethe ngokwemvelo insimbi njengento ye-radiator.Ngakho-ke, emlandweni wokuthuthukiswa kwama-radiators, izinto ezilandelayo ziye zavela: ama-radiator ahlanzekile e-aluminium, ama-radiator ahlanzekile ethusi, nobuchwepheshe benhlanganisela yethusi-aluminium.
Ukusebenza kahle okukhanyayo okuphelele kwe-LED kuphansi, ngakho-ke izinga lokushisa elihlangene liphezulu, okuholela empilweni efinyeziwe.Ukuze ukhulise impilo futhi unciphise izinga lokushisa elihlangene, kuyadingeka ukunaka inkinga yokushisa ukushisa.