Ikhiqizwa kanjani izinga lokushisa le-LED chip junction?
Isizathu sokuthi kungani i-LED ishisa ingoba amandla kagesi angeziwe awaguqulwa wonke abe amandla okukhanya, kodwa ingxenye yawo iguqulwa ibe amandla okushisa.Ukusebenza kahle kokukhanya kwe-LED okwamanje kungu-100lm/W kuphela, futhi ukusebenza kahle kwayo kokuguqulwa kwe-electro-optical cishe ku-20~30%.Okusho ukuthi, cishe u-70% wamandla kagesi aguqulwa abe amandla okushisa.
Ngokuqondile, ukukhiqizwa kokushisa kwe-junction ye-LED kubangelwa izici ezimbili.
1. Ukusebenza kahle kwe-quantum yangaphakathi akuphakeme, okungukuthi, lapho ama-electron nezimbobo kuhlanganiswa kabusha, ama-photons awakwazi ukukhiqizwa ngo-100%, okuvame ukubizwa ngokuthi "ukuvuza kwamanje", okunciphisa izinga lokuhlanganisa kabusha labathwali esifundeni se-PN.Ukuvuza kwamanje okuphindaphindiwe yi-voltage kungamandla ale ngxenye, eguqulwa ibe amandla okushisa, kodwa le ngxenye ayibali ingxenye eyinhloko, ngoba ukusebenza kahle kwe-photon yangaphakathi manje sekusondele ku-90%.
2.Ama-photon akhiqizwe ngaphakathi awakwazi ukukhishwa wonke ngaphandle kwe-chip futhi ekugcineni aguqulelwe ekushiseni.Le ngxenye iyingxenye eyinhloko, ngoba ukusebenza kahle kwe-quantum yamanje okubizwa ngokuthi ingaphandle cishe ku-30% kuphela, futhi iningi layo liguqulwa libe ukushisa.Nakuba ukusebenza kahle okukhanyayo kwesibani se-incandescent kuphansi kakhulu, cishe ngo-15lm/W kuphela, siguqula cishe wonke amandla kagesi abe amandla okukhanya futhi siwakhiphele ngaphandle.Ngenxa yokuthi amandla amaningi akhazimulayo ayi-infrared, ukusebenza kahle okukhanyayo kuphansi kakhulu, kodwa kuqeda inkinga yokupholisa.Manje abantu abaningi ngokwengeziwe banaka ukuchithwa kokushisa kwe-LED.Lokhu kungenxa yokuthi ukubola kokukhanya noma ukuphila kwe-LED kuhlobene ngokuqondile nezinga lokushisa lokuhlangana kwayo.
Uhlelo lokusebenza lokukhanya okumhlophe kwe-LED enamandla amakhulu kanye nezixazululo zokukhipha ukushisa kwe-chip ye-LED
Namuhla, imikhiqizo yokukhanya okumhlophe kwe-LED isetshenziswa kancane kancane emikhakheni ehlukahlukene.Abantu bazwa injabulo emangalisayo elethwa ukukhanya okumhlophe kwe-LED enamandla amakhulu futhi bakhathazekile ngezinkinga ezihlukahlukene ezingokoqobo!Okokuqala, kusukela kumvelo yokukhanya okumhlophe kwe-LED enamandla aphezulu ngokwayo.I-LED enamandla amakhulu isanenkinga yokungafani kahle kokukhishwa kokukhanya, isikhathi esifushane sokuphila sezinto zokuvala, futhi ikakhulukazi inkinga yokukhishwa kokushisa kwama-chips e-LED, okunzima ukuyixazulula, futhi ayikwazi ukusizakala ngezinzuzo ezilindelekile zohlelo lokusebenza lwe-LED emhlophe.Okwesibili, kusukela ngentengo yemakethe yokukhanya okumhlophe kwe-LED okunamandla aphezulu.I-LED yanamuhla enamandla amakhulu isengumkhiqizo wokukhanya omhlophe ohlonishwayo, ngoba intengo yemikhiqizo yamandla aphezulu isaphezulu kakhulu, futhi ubuchwepheshe busadinga ukuthuthukiswa, ukuze imikhiqizo ye-LED emhlophe enamandla amakhulu ayikwazi ukusetshenziswa yinoma ubani ofuna. ukuzisebenzisa.Njengeisibonisi se-LED esiguquguqukayo.Ake sihlukanise izinkinga ezihlobene zokukhipha ukushisa kwe-LED yamandla aphezulu.
Eminyakeni yamuva nje, ngemizamo yochwepheshe bemboni, izixazululo ezimbalwa zokuthuthukisa ziye zahlongozwa zokuqeda ukushisa kwama-chips we-LED wamandla aphezulu:
Ⅰ.Khulisa inani lokukhanya okukhishwayo ngokwandisa indawo ye-chip ye-LED.
Ⅱ.Yamukela iphakheji yama-chips e-LED amaningi endaweni encane.
Ⅲ.Shintsha izinto zokupakisha ze-LED nezinto ze-fluorescent.
Ngakho-ke kungenzeka yini ukuba uthuthukise ngokuphelele inkinga yokukhishwa kokushisa kwemikhiqizo yokukhanya okumhlophe kwe-LED enamandla amakhulu ngokusebenzisa izindlela ezintathu ezingenhla?Eqinisweni, kuyamangaza!Okokuqala, nakuba sandisa indawo ye-chip ye-LED, singathola ukugeleza okukhanyayo okwengeziwe (ukukhanya okudlula iyunithi yesikhathi) Inani lemishayo endaweni yeyunithi yi-flux ekhanyayo, futhi iyunithi ingu-ml).Kuhle ngobaImboni ye-LED.Sithemba ukuzuza umphumela wokukhanya okumhlophe esiwufunayo, kodwa ngenxa yokuthi indawo yangempela inkulu kakhulu, kunezinto ezithile ezingakhiqizi kunqubo nesakhiwo sohlelo.
Ngakho-ke akunakwenzeka ngempela ukuxazulula inkinga yokushisa kokukhanya okumhlophe kwe-LED okunamandla aphezulu?Yiqiniso, akunakwenzeka ukuxazulula.Ngenxa yezinkinga ezingezinhle ezibangelwa ukukhulisa indawo ye-chip, abakhiqizi bokukhanya okumhlophe kwe-LED bathuthukise ingaphezulu le-chip ye-LED enamandla amakhulu ngokufaka ama-chips e-LED amaningana endaweni encane ngokusho kokuthuthukiswa kwesakhiwo se-electrode kanye ne-flip-chip. isakhiwo ukuze kuzuzwe 60lm./W ukukhanya okukhanyayo okuphezulu nokusebenza kahle kokukhanya okuphansi ngokukhipha ukushisa okuphezulu.
Eqinisweni, kukhona enye indlela engathuthukisa ngokuphumelelayo inkinga yokukhishwa kokushisa kwama-chips we-LED wamandla aphezulu.Lokho kuwukufaka esikhundleni sepulasitiki yangaphambilini noma i-plexiglass nge-silicone resin yezinto zayo ezimhlophe zokupakisha.Ukushintsha izinto zokupakisha akukwazi nje ukuxazulula inkinga yokushabalalisa ukushisa kwe-chip ye-LED, kodwa futhi kuthuthukise impilo ye-LED emhlophe, ebulala ngempela izinyoni ezimbili ngetshe elilodwa.Engifuna ukukusho ukuthi cishe yonke imikhiqizo ye-LED yokukhanya okumhlophe enamandla amakhulu njengamandla aphezulu okukhanya okumhlophe kwe-LED kufanele isebenzise i-silicone njenge-encapsulation material.Kungani kufanele kusetshenziswe ijeli ye-silica njengempahla yokupakisha ku-LED enamandla amakhulu manje?Ngoba ijeli ye-silica idonsa ngaphansi kuka-1% wokukhanya kobude obufanayo.Kodwa-ke, izinga lokumuncwa kwe-epoxy resin kuya ku-400-459nm ukukhanya liphezulu njengo-45%, futhi kulula ukubangela ukubola kokukhanya okukhulu ngenxa yokuguga okubangelwa ukumuncwa kwesikhathi eside kwalokhu kukhanya kwamaza amaza amafushane.
Yiqiniso, ekukhiqizeni kwangempela kanye nokuphila, kuzoba nezinkinga eziningi ezifana nokuchithwa kokushisa kwama-chips amhlophe e-LED anamandla amakhulu, ngoba ukusetshenziswa okubanzi kokukhanya okumhlophe kwe-LED okunamandla aphezulu, izinkinga ezijulile nezinzima zizoba khona. vela!Izici zama-LED chips Ukushisa okuphezulu kakhulu kukhiqizwa ngevolumu encane kakhulu.Amandla okushisa e-LED ngokwawo mancane kakhulu, ngakho-ke ukushisa kufanele kuqhutshwe ngesivinini esisheshayo, ngaphandle kwalokho izinga lokushisa eliphezulu le-junction lizokhiqizwa.Ukuze ukhiphe ukushisa ku-chip ngangokunokwenzeka, ukuthuthukiswa okuningi kwenziwe esakhiweni se-chip se-LED.Ukuze kuthuthukiswe ukuchithwa kokushisa kwe-chip ye-LED ngokwayo, ukuthuthukiswa okuyinhloko ukusebenzisa i-substrate impahla ene-conductivity engcono yokushisa.
Ukuqapha izinga lokushisa lelambu le-LED nakho kungangeniswa kusilawuli esincane
Ohlotsheni oluthuthukisiwe lwamandla e-NTC, uma ufuna ukuzuza idizayini engcono, kuphinde kube indlela enengqondo yokwenza umklamo wokuphepha onembe kakhudlwana nge-MCU.Kuphrojekthi yokuthuthukisa, isimo semojula yomthombo wokukhanya we-LED singahlukaniswa ngokuthi noma ukukhanya kucishiwe noma cha, ngohlelo lokwahlulela olunengqondo lwesixwayiso sezinga lokushisa nokulinganisa izinga lokushisa, kwakhiwa indlela yokulawula ukukhanya ehlakaniphe kakhulu. .
Isibonelo, uma kunesexwayiso sokushisa kwesibani, izinga lokushisa lemojula lisengaphakathi kwebanga elamukelekayo ngokulinganisa izinga lokushisa, futhi indlela evamile ingagcinwa ukuze kukhishwe izinga lokushisa lokusebenza ngokwemvelo ngomshini wokushisa.Futhi uma isexwayiso sazisa ukuthi izinga lokushisa elilinganisiwe selifinyelele isilinganiso sokuqalisa indlela yokupholisa esebenzayo, i-MCU kufanele ilawule ukusebenza kwefeni yokupholisa.Ngokufanayo, lapho izinga lokushisa lingena endaweni, indlela yokulawula kufanele ivale ngokushesha umthombo wokukhanya, futhi ngesikhathi esifanayo iqinisekisa izinga lokushisa futhi imizuzwana engu-60 noma imizuzwana engu-180 ngemva kokuba uhlelo luvaliwe.Uma izinga lokushisa lemojuli yomthombo wokukhanya wesimo esiqinile se-LED ifinyelela inani elivamile, shayela umthombo wokukhanya we-LED futhi futhi uqhubeke ukhipha ukukhanya.
Isikhathi sokuthumela: Nov-09-2022