Isizathu sokuba umthombo wokukhanya we-LED ushushu
Ukufudumeza kwe-PN ye-LED kuqala kuqhutyelwa kumphezulu we-wafer nge-wafer semiconductor material ngokwayo, enokumelana ne-thermal ethile. Ukususela kumbono wecandelo le-LED, kuxhomekeke kwisakhiwo sephakheji, kukho ukuchasana kwe-thermal yobukhulu obuhlukeneyo phakathi kwe-wafer kunye nomnini. Umyinge wezi zinto zimbini zokuchasana ne-thermal zenza i-thermal resistance Rj-a ye-LED. Ukusuka kumbono womsebenzisi, i-Rj-iparameter ye-LED ethile ayinakuguqulwa. Le yingxaki ukuba iinkampani zokupakisha ze-LED kufuneka zifunde, kodwa kunokwenzeka ukunciphisa ixabiso le-Rj-ixabiso ngokukhetha iimveliso okanye iimodeli ezivela kubakhiqizi abahlukeneyo.
Kwizibane ze-LED, indlela yokudlulisa ubushushu ye-LED inzima kakhulu. Eyona ndlela iphambili yi-LED-PCB-heatsink-fluid. Njengomyili wezikhanyiso, umsebenzi onentsingiselo ngokwenene kukwandisa imathiriyeli ye-luminaire kunye nesakhiwo sokutshatyalaliswa kobushushu ukunciphisa amacandelo e-LED kangangoko kunokwenzeka. Ukumelana nobushushu phakathi kolwelo.
Njengomthwali wokunyusa amacandelo e-elektroniki, amacandelo e-LED aqhagamshelwe kakhulu kwibhodi yesekethe ngokuthengiswa. Ukumelana ne-thermal jikelele yebhodi yesekethe esekwe kwintsimbi kuncinci. Ngokuqhelekileyo zisetyenziselwa i-copper substrates kunye ne-aluminium substrates, kwaye i-aluminium substrates iphantsi kwexabiso. Iye yamkelwa ngokubanzi lishishini. Ukuxhatshazwa kwe-thermal ye-aluminium substrate kuyahluka ngokuxhomekeke kwinkqubo yabavelisi abahlukeneyo. Ukumelana nobushushu obusondeleyo ngu-0.6-4.0 ° C / W, kwaye umahluko wexabiso ukhulu kakhulu. I-aluminium substrate ngokubanzi inemigangatho emithathu yomzimba, umaleko we-wiring, i-insulating layer, kunye ne-substrate layer. I-conductivity yombane yezixhobo zokukhusela zombane jikelele nazo zihlupheke kakhulu, ngoko ke ukuxhathisa kwe-thermal kuphuma ikakhulu kwi-insulating layer, kwaye izinto zokukhusela ezisetyenziswayo zahluke kakhulu. Phakathi kwabo, i-ceramic-based insulating medium inomlinganiselo omncinci omncinci we-thermal. I-aluminiyam substrate engabizi kakhulu idla ngokuba ngumaleko wokugquma weglasi okanye umaleko wokugquma intlaka. Ukuxhatshazwa kwe-thermal kwakhona kuhambelana ngokufanelekileyo nobukhulu bomgca we-insulation.
Ngaphantsi kweemeko zeendleko kunye nokusebenza, uhlobo lwe-aluminium substrate kunye nommandla we-aluminium substrate zikhethwe ngokufanelekileyo. Ngokwahlukileyo, uyilo oluchanekileyo lokumila kobushushu kunye nolona xhulumaniso lungcono phakathi kwesitya sobushushu kunye ne-aluminium substrate sisitshixo sempumelelo yoyilo lwe-luminaire. Eyona nto ekunqumeni ubungakanani bokutshatyalaliswa kobushushu yindawo yokudibanisa i-heat sink kunye ne-fluid kunye nesantya sokuhamba kwamanzi. Izibane ze-LED ngokubanzi zichithwa ngokuguquguqukayo kwemvelo, kunye nemitha ye-thermal nayo enye yeendlela eziphambili zokutshatyalaliswa kobushushu.
Ke ngoko, sinokuhlalutya izizathu zokusilela kwezibane ze-LED ukuphelisa ubushushu:
1. Umthombo wokukhanya kwe-LED unokumelana okukhulu kwe-thermal, kwaye umthombo wokukhanya awuchithi. Ukusetyenziswa kwe-thermal paste kuya kubangela ukuba intshukumo yokutshatyalaliswa kobushushu ingaphumeleli.
I-2.I-aluminium substrate isetyenziswa njengomthombo wokukhanya woqhagamshelwano lwe-PCB. Ekubeni i-aluminium substrate ineendlela ezininzi zokuchasana ne-thermal, umthombo wokushisa womthombo wokukhanya awukwazi ukuhanjiswa, kwaye ukusetyenziswa kwe-thermal conductive paste kunokubangela ukuba intshukumo yokutshatyalaliswa kobushushu ingaphumeleli.
3.Akukho sithuba se-thermal buffering ye-light-emitting surface, eya kubangela ukuba ukutshatyalaliswa kobushushu bomthombo wokukhanya kwe-LED kungaphumeleli, kwaye ukubola kokukhanya kuqhubele phambili. Ezi zizathu zithathu zingasentla zizathu eziphambili zokungaphumeleli kwezixhobo zokukhanyisa i-LED kwishishini, kwaye akukho sisombululo esicacileyo. Ezinye iinkampani ezinkulu zisebenzisa i-ceramic substrate ukutshabalalisa ipakethe yesibane, kodwa ayinakusetyenziswa ngokubanzi ngenxa yeendleko eziphezulu.
Ke ngoko, kuye kwacetywa uphuculo oluthile:
1. Uburhabaxa bomphezulu we-heat sink yesibane se-LED yenye yeendlela zokuphucula ngempumelelo amandla okuphelisa ubushushu.
Ukwenziwa rhabaxa kumphezulu kuthetha ukuba akukho mhlaba ugudileyo usetyenziswayo, onokuthi uphunyezwe ngeendlela eziphathekayo nangemichiza. Ngokuqhelekileyo, yindlela yokuqhushumba kwesanti kunye ne-oxidation. Umbala kwakhona yindlela yeekhemikhali, enokugqitywa kunye ne-oxidation. Xa uyila isixhobo sokugaya iprofayili, kunokwenzeka ukuba ungeze ezinye iimbambo kwindawo yokwandisa indawo yokuphucula ubushushu bokushisa kwesibane se-LED.
2. Indlela eqhelekileyo yokwandisa isakhono semitha yobushushu kukusebenzisa unyango olukumphezulu olunombala omnyama.