Yenziwa njani iqondo lobushushu le-LED chip junction?
Isizathu sokuba i-LED ishushu kukuba amandla ombane ongeziweyo awaguqulwanga onke abe ngamandla okukhanya, kodwa inxalenye yawo iguqulwa ibe ngamandla obushushu.Ukusebenza kokukhanya kwe-LED okwangoku kuphela yi-100lm / W, kwaye ukuguqulwa kwayo kwe-electro-optical kuguquko malunga ne-20 ~ 30% kuphela.Oko kukuthi, malunga ne-70% yamandla ombane aguqulwa abe ngamandla obushushu.
Ngokukodwa, isizukulwana sobushushu be-junction ye-LED sibangelwa zizinto ezimbini.
1. Ukusebenza kwe-quantum yangaphakathi ayiphezulu, oko kukuthi, xa i-electron kunye nemingxuma iphinda ihlanganiswe, i-photons ayikwazi ukuveliswa i-100%, edla ngokubizwa ngokuba "ukuvuza kwangoku", okunciphisa izinga lokuphinda lidibanise abathwali kwingingqi ye-PN.Ukuvuza kwangoku kwandiswe yi-voltage ngamandla ale nxalenye, eguqulwa ibe amandla okushisa, kodwa le nxalenye ayifaki icandelo eliphambili, kuba ukusebenza kwe-photon yangaphakathi ngoku kusondele kwi-90%.
I-2.Iifotoni ezenziwe ngaphakathi azikwazi ukukhutshwa zonke ngaphandle kwe-chip kwaye ekugqibeleni ziguqulelwe kubushushu.Le nxalenye iyona nxalenye iphambili, kuba i-quantum esebenzayo yangoku ebizwa ngokuba yangaphandle imalunga ne-30% kuphela, kwaye uninzi lwayo luguqulwa lube bubushushu.Nangona ukusebenza okukhanyayo kwesibane se-incandescent kuphantsi kakhulu, kuphela malunga ne-15lm / W, iguqula phantse onke amandla ombane kumandla okukhanya kwaye ikhuphe ngaphandle.Ngenxa yokuba uninzi lwamandla akhanyayo yi-infrared, ukukhanya okukhanyayo kuphantsi kakhulu, kodwa kuphelisa ingxaki yokupholisa.Ngoku abantu abaninzi ngakumbi banikela ingqalelo ekutshitshisweni kobushushu be-LED.Oku kungenxa yokuba ukubola kokukhanya okanye ubomi be-LED buhambelana ngokuthe ngqo nobushushu bayo bokuhlangana.
Ukusetyenziswa kokukhanya okumhlophe kwe-LED ephezulu kunye nezisombululo zokutshatyalaliswa kobushushu be-chip ye-LED
Namhlanje, iimveliso zokukhanya ezimhlophe ze-LED zisetyenziswa ngokuthe ngcembe kwiinkalo ezahlukeneyo.Abantu baziva uyolo olumangalisayo oluziswe kukukhanya okumhlophe kwe-LED enamandla amakhulu kwaye banexhala malunga neengxaki ezahlukeneyo ezisebenzayo!Okokuqala, ukusuka kwindalo yokukhanya okumhlophe kwe-LED ephezulu yamandla ngokwayo.I-LED enamandla amakhulu isabandezeleka ngenxa yokungahambelani kakuhle kokukhutshwa kokukhanya, ubomi obufutshane bezinto zokutywina, kwaye ngakumbi ingxaki yokutshatyalaliswa kobushushu be-chips ze-LED, okunzima ukuyicombulula, kwaye ayikwazi ukuthatha inzuzo yezicelo ezilindelekileyo ze-LED ezimhlophe.Okwesibini, ukusuka kwixabiso lemarike yokukhanya okumhlophe kwe-LED ephezulu.I-LED yanamhlanje enamandla amakhulu iseyimveliso yokukhanya okumhlophe, kuba ixabiso leemveliso zamandla aphezulu lisephezulu kakhulu, kwaye iteknoloji isafuna ukuphuculwa, ngoko ke iimveliso ze-LED ezimhlophe azikwazi ukusetyenziswa nguye nabani na ofuna. ukuzisebenzisa.Njengeumboniso we-LED oguquguqukayo.Makhe siqhawule iingxaki ezinxulumene nokutshatyalaliswa kobushushu be-LED ephezulu.
Kwiminyaka yakutshanje, ngeenzame zeengcali zoshishino, izisombululo ezininzi zokuphucula ziye zacetywa ukutshabalalisa ubushushu be-chips ze-LED eziphezulu:
Ⅰ.Ukwandisa umthamo wokukhanya okhutshwe ngokunyusa indawo ye-chip ye-LED.
Ⅱ.Yamkela iphakheji yeetshiphusi ezininzi ze-LED ezincinci.
Ⅲ.Guqula izinto zokupakisha ze-LED kunye nezixhobo ze-fluorescent.
Ngoko ngaba kunokwenzeka ukuba uphucule ngokupheleleyo ingxaki yokutshatyalaliswa kobushushu bemveliso yokukhanya okumhlophe kwe-LED ngokusebenzisa ezi ndlela zintathu zingasentla?Enyanisweni, iyamangalisa!Okokuqala, nangona sinyusa indawo ye-chip ye-LED, sinokufumana ukukhanya okukhanyayo ngakumbi (ukukhanya okudlula kwiyunithi yexesha) Inani leemitha kwindawo yeyunithi yi-flux ekhanyayo, kwaye iyunithi yi-ml).IlungeleIshishini le-LED.Sithemba ukufezekisa umphumo wokukhanya okumhlophe esikufunayo, kodwa ngenxa yokuba indawo yokwenyani inkulu kakhulu, kukho izinto ezichasene nemveliso kwinkqubo yesicelo kunye nesakhiwo.
Ngaba ngokwenene akunakwenzeka ukusombulula ingxaki yokukhanya okumhlophe okukhanyayo kwe-LED yamandla aphezulu?Kakade ke, akunakwenzeka ukucombulula.Ngenxa yeengxaki ezingezizo ezibangelwa kukwandisa indawo ye-chip, abavelisi bokukhanya okumhlophe kwe-LED baye baphucula umphezulu we-chip ye-LED ephezulu ngokufaka iitshiphusi ze-LED eziliqela ngokokuphuculwa kwesakhiwo se-electrode kunye ne-flip-chip. isakhiwo ukufikelela 60lm./W ukukhanya okukhanyayo okuphezulu kunye nokusebenza okuphantsi kokukhanya kunye nokutshatyalaliswa kobushushu obuphezulu.
Ngapha koko, kukho enye indlela enokuphucula ngokufanelekileyo ingxaki yokuphelisa ubushushu be-chips ze-LED eziphezulu.Oko kukutshintsha iplastiki yangaphambili okanye i-plexiglass kunye ne-silicone resin kwizinto zayo zokupakisha ezimhlophe.Ukutshintsha izinto zokupakisha akunakucombulula kuphela ingxaki yokutshatyalaliswa kobushushu be-chip ye-LED, kodwa nokuphucula ubomi be-LED emhlophe, ebulala ngokwenene iintaka ezimbini ngelitye elinye.Into endifuna ukuyithetha kukuba phantse onke amandla aphezulu amhlophe ukukhanya kweemveliso ze-LED ezifana namandla aphezulu okukhanya okumhlophe kwe-LED kufuneka kusebenzise i-silicone njengempahla ye-encapsulation.Kutheni kufuneka ijeli yesilica isetyenziswe njengempahla yokupakisha kwi-LED enamandla amakhulu ngoku?Kuba ijeli ye-silica ifunxa ngaphantsi kwe-1% yokukhanya kobude obufanayo.Nangona kunjalo, izinga lokufunxa i-epoxy resin ukuya kwi-400-459nm yokukhanya iphezulu njenge-45%, kwaye kulula ukubangela ukubola kokukhanya okukhulu ngenxa yokuguga okubangelwa ukufunxwa kwexesha elide kwesi khanyiso sobude obufutshane.
Ngokuqinisekileyo, kwimveliso yokwenyani kunye nobomi, kuya kubakho iingxaki ezininzi ezinje ngokutshatyalaliswa kobushushu bamandla aphezulu e-LED emhlophe chips, kuba usetyenziso olubanzi lokukhanya okumhlophe kwe-LED ephezulu, iingxaki ezinzulu kunye nobunzima ziya kuthi. vela!Iimpawu ze-chips ze-LED Ubushushu obuphezulu kakhulu buveliswa kumthamo omncinci kakhulu.Umthamo wokushisa we-LED ngokwawo uncinci kakhulu, ngoko ukushisa kufuneka kuqhutywe ngaphandle kwesantya esikhawulezayo, ngaphandle koko kuya kuveliswa ukushisa okuphezulu kwe-junction.Ukuze ukhuphe ubushushu kwi-chip kangangoko kunokwenzeka, uphuculo oluninzi lwenziwe kwisakhiwo se-chip ye-LED.Ukuze kuphuculwe ukutshatyalaliswa kobushushu be-chip ye-LED ngokwayo, ukuphuculwa okuphambili kukusebenzisa i-substrate impahla kunye ne-thermal conductivity engcono.
Ukubeka iliso ubushushu besibane se-LED kunokungeniswa kwi-micro-controller
Kuhlobo oluphuculweyo lwamandla e-NTC, ukuba ufuna ukufezekisa uyilo olungcono, ikwayindlela enobuchule yokwenza uyilo lokhuseleko oluchanekileyo nge-MCU.Kwiprojekthi yophuhliso, ubume bemodyuli yomthombo wokukhanya we-LED inokwahlulwa ibe nokuba ukukhanya kucinyiwe na okanye hayi, kunye nenkqubo enengqondo yokugweba isilumkiso sobushushu kunye nomlinganiselo wobushushu, inkqubo yolawulo lokukhanyisa egqibeleleyo ngakumbi iyakhiwa. .
Ngokomzekelo, ukuba kukho isilumkiso sesibane sesibane, ukushisa kwemodyuli kusekho kuluhlu olwamkelekileyo ngokulinganisa ubushushu, kwaye indlela eqhelekileyo inokugcinwa ukuze ikhuphe ngokwemvelo ubushushu bokusebenza ngokusebenzisa i-heat sink.Kwaye xa isilumkiso sazisa ukuba ubushushu obulinganisiweyo bufikelele kwinqanaba lokusebenzisa indlela yokupholisa esebenzayo, i-MCU kufuneka ilawule ukusebenza kwefeni yokupholisa.Ngokufanayo, xa ubushushu bungena kwindawo, indlela yokulawula kufuneka ivale ngokukhawuleza umthombo wokukhanya, kwaye kwangaxeshanye uqinisekise ubushushu kwakhona imizuzwana engama-60 okanye imizuzwana eyi-180 emva kokuba inkqubo icinyiwe.Xa ubushushu bemodyuli yomthombo wokukhanya we-LED ifikelela kwixabiso eliqhelekileyo, qhuba umthombo wokukhanya we-LED kwakhona kwaye uqhubeke nokukhupha ukukhanya.
Ixesha lokuposa: Nov-09-2022