Amanqaku ama-4 oBuchule boLawulo loBubushushu obuPhezulu be-LED

Ukusetyenziswa kwezixhobo zokukhanyisa ze-LED eziphezulu kuya kuba banzi kwaye kubanzi, kunye nokukhanya okukhanyayo kwe-LED ephezulu ngokwenene kuhambelana nokukhoyo kwayo, kwaye i-front current ye-high-power LED iya kutshintsha kwakhona kunye nokutshintsha kweqondo lokushisa. Namhlanje, ndiza kuthatha wonke umntu ukuba afunde ngesizathu sobushushu be-LED knot kunye ne-LED semiconductor yokukhanyisa umthombo wokushisa ubushushu indlela. Kwiminyaka yakutshanje yophuhliso, ukukhanya kwe-LED okusebenzayo kuye kwaba phezulu nangaphezulu, iindleko ziya zincinci, kwaye imibala iye yatyeba kwaye icebile. Oku kwenza ii-LEDs zamandla aphezulu njengomsebenzi osebenzayo, ogcina amandla, ulungele ukusingqongileyo, kunye nomthombo wokucoca okhuselekileyo kwixesha elizayo. Nangona kunjalo, ingxaki yokutshatyalaliswa kobushushu kwizibane eziphezulu ze-LED iseyi-bottleneck enkulu yophuhliso kwisicelo sayo kwintsimi yokukhanyisa. Sisizathu esibalulekileyo sokukhawulela isizukulwana saso esitsha semithombo yokukhanyisa. Idatha yophando ibonisa ukuba xa i-chip ye-LED inokukhanya okukhanyayo xa ubushushu be-knot ye-chip ye-LED yi-25 C, ngoko xa i-knot iqondo lokushisa liphakama ukuya kuma-60 C, isixa sayo esikhanyayo siya kuba ngama-90% kuphela; xa iqondo lokushisa lifikelela kwi-100 C, liya kuhla ukuya kuma-80%. ; 140 C ngu-70% kuphela. Inokubonwa ukuba ukuphucula ubushushu bokulawula ukutshatyalaliswa kobushushu kubaluleke kakhulu ekuphuculeni ukusebenza kwayo okukhanyayo. Ukuba ingxaki yokutshatyalaliswa kobushushu kwizibane eziphezulu ze-LED azisonjululwanga, ubushushu bokusebenza kwezibane ze-LED buya kunyuka kwaye iqondo lobushushu leqhina liya kwanda, okuya kubangela ukuba i-chroma ye-LED icuthwe, isalathiso sombala siyancipha, ubushushu bombala buyanda. , ukukhanya okukhupha ukukhanya kuyancipha, kwaye ubomi benkonzo buya kufinyezwa. Ukukhanya okukhanyayo kwe-LED yamandla aphezulu eneneni ilingana neyangoku. Ukuba ukuphuma kwe-optical flux ye-high-power LED ilawulwa, ilingana nokulawula ukukhanya kwayo okukhanyayo. I-positive current ye-high-power LEDs nayo iya kutshintsha kunye nobushushu. Xa ubushushu bendalo budlula ixabiso elithile (sibiza ubushushu bokhuseleko), i-front current ye-LED iya kuncitshiswa ngokukhawuleza. Ngeli xesha, ukuba yangoku iyaqhubeka Ukwandisa, kuya kubangela ukuba ubomi be-LED bunciphise. Ngoko ke, ngeli xesha, amanyathelo ahambelanayo kufuneka enziwe. Xa i-bubble isibane igalelo langoku kunye nobushushu obujikelezileyo butshintshiwe, i-high-power LED positive current inokulawulwa ngexesha. Sebenzisa itekhnoloji yembuyekezo yobushushu ukulungelelanisa ngokuguquguqukayo imveliso yangoku ngokuhambelana nobushushu be-ambient, kwaye ubeke iliso kwiqondo lobushushu le-LED ngexesha lokwenyani, ukuze i-LED yamandla aphezulu kwiimeko zobushushu obuphezulu inciphise ngokuzenzekelayo yangoku. 1. Imo yangoku yeemveliso zokukhanyisa ze-LED eziphezulu "i-chip-aluminium substrate-imowudi ye-radiator enemigangatho emithathu" isetyenziswa ngowona mandla amakhulu okukhanyisa izibane ze-LED kwimarike yangoku, oko kukuthi, i-chip yokuqala yokupakisha kwi-aluminium substrates. ukwenza imodyuli yomthombo wokukhanya we-LED, kwaye emva koko ufake imodyuli yomthombo wokukhanya kwirediyetha ukuze wenze isibane sokukhanya kwe-LED ephezulu. Okwangoku, ukusetyenziswa kwangaphambili kwee-LED ukubonisa izibane kunye nezibonakaliso zisetyenziswa njengenkqubo yokulawula i-thermal yee-LED eziphezulu zamandla. Le ndlela yokulawula i-thermal ilinganiselwe kusetyenziso oluncinci lwe-LED. Izibane eziphezulu ze-LED ezilungiselelwe yimowudi ye-three-layer structure, kusekho iindawo ezininzi ezingenangqiqo malunga nesakhiwo senkqubo, ezifana nobushushu obuphezulu be-knot, ukusebenza kakuhle kokutshatyalaliswa kobushushu, ukuchasana okungaphezulu kwe-thermal phakathi kwezakhiwo, ukusebenza okuphantsi kokushisa ubushushu, ngakumbi ukuchasana kwe-thermal Ngenxa yoko, ubushushu obukhutshwe yi-chip abukwazi ukusasazwa ngokufanelekileyo kwaye buthunyelwe ngaphandle, okukhokelela ekukhanyeni kokukhanya kwe-LED, ukukhanya okuphantsi, kunye nobomi obufutshane. Ngenxa yokuthintelwa kwezinto ezininzi ezifana nesakhiwo, iindleko, kunye nokusetyenziswa kwamandla, ukukhanya kwe-LED ephezulu kunzima ukwamkela indlela yokutshatyalaliswa kobushushu esebenzayo, kwaye inokwamkela kuphela indlela yokutshatyalaliswa kobushushu, kodwa ukuchithwa kobushushu kunomlinganiselo omkhulu; kunye nokuguqulwa kwamandla okusebenza ngoku ii-LED zisasebenza Akunjalo phezulu, malunga ne-70% yamandla okufakelwayo anokuguqulwa kubushushu, nokuba umphumo wokukhanya unyuswe ngama-40%, amandla aguqulwa abe bubushushu, oko kukuthi, kunzima ukunyusa izinga lokutshatyalaliswa kobushushu ngaphandle kokuqwalasela ukutshatyalaliswa kobushushu. 2. Iimpawu zemithombo yokukhanyisa izibane ze-LED zihluke kwizibane zendabuko ze-fluorescent, izibane ze-incandescent, kunye nezibane ze-halogen. Imithombo yokukhanya yokukhanyisa i-semiconductor ye-LED yenziwe ngezinto ze-semiconductor kwaye iquka i-PN. I-acupoints ye-Electronics-based acupoints ivelisa ukukhanya okubonakalayo ngokusebenzisa i-composite, i-PN i-positive guide Tong, i-reverse cut off, apho i-N indawo ihambelana ne-electrode engalunganga, kwaye indawo ye-P ihambelana ne-pole positive. Imithombo yokukhanya ye-semiconductor ye-LED ineenzuzo zokukhanya okuphezulu kokukhanya, ixesha elifutshane lokuphendula, umthamo omncinci, ukugcinwa kwamandla kunye nezinye iingenelo. Ukongezelela, ikwanayo neempawu zemithombo yokukhanya yendabuko: i-2.1 ineempawu zezixhobo ezifanayo ze-PN semiconductor: 1) I-voltage ekhoyo kunye neyo phambili i-coefficients engalunganga yokushisa, eyancipha njengoko izinga lokushisa linyuka; 2) Amandla ombane afanelekileyo Kufuneka adlule umda othile wokuvelisa umsinga; 3) Xa ubuyela umva, akukho msinga uya kusebenza. 2.2 Mininzi imiba yokuthintela ubushushu bayo bokusebenza. Ezi nkcukacha zilandelayo: 1) Ukukhanya kwe-LED kunye ne-positive current ibonisa ubudlelwane obuthile begophe. Xa ubushushu beqhina budlula ixabiso elithile, ukukhanya kuncipha ngokuhla kwamandla akhoyo ngoku; 2 ) Kufuneka unciphise iqondo lobushushu leqhina libe ngaphantsi kwexabiso elilinganisiweyo lama-95 C ukuya kwi-125 C; 3) Ukuba umphezulu uqulethe iilensi zeplastiki, uya kunqunyulwa ngumgangatho wokushisa we-lens. 3. Intshayelelo kwi-LED knot lokushisa 3.1 Isizathu somkhuhlane we-LED owenziwe ngumkhuhlane we-LED ngenxa yokuba amandla ongeziweyo awayiyo yonke iguqulwa ngendlela yamandla okukhanya, kwaye ezinye zazo ziguqulelwe kumandla okushisa. Okwangoku, ukukhanya kokukhanya kwe-LED kwimarike malunga ne-100 LM / W. Ngamanye amazwi, malunga ne-70% yamandla ombane achithwa ngendlela yamandla ashushu. Ngokuqhelekileyo, kukho izinto ezimbini ezikhokelela ekuveliseni ubushushu be-knot ye-LED. Ngokucacileyo ngolu hlobo lulandelayo: 1) Ukusebenza komyinge wangaphakathi. Xa i-acupuncture kunye ne-electron composite zidityanisiwe, azikwazi ukuvelisa zonke iifotoni. Oku kuqhele ukubizwa ngokuba "kukuvuza kwangoku", esi sizathu sokuba kutheni izinga lokulayishwa kommandla we-PN lincitshisiwe. Amandla ombane ombane avuzayo kwaye langoku ngamandla okusasazwa kweli candelo, oko kukuthi, ukuguqulwa kumandla obushushu, kodwa le nxalenye ayilona candelo liphambili, kuba itekhnoloji yangoku inokwenza ukusebenza kwefoton yangaphakathi ye-LED isondele kwi-90. %. 2) Ngokumalunga ne-30% yokusebenza kakuhle komyinge wangaphandle. Esinye sezizathu eziphambili kukuba iifotoni eziveliswa yi-loadmons azikwazi ukuguqulwa zibe ngaphandle kwe-chip kodwa ziguqulelwe kubushushu. Nangona izibane ze-incandescent zimalunga ne-15LM / W kuphela, kodwa ekugqibeleni, zikhupha amandla ombane ngendlela yamandla okukhanya. Nangona uninzi lwamandla emitha ye-infrared kunye nesiphumo sokukhanya siphantsi kakhulu, oku kukhululwa kwingxaki yokutshatyalaliswa kobushushu. Ingxaki yokutshatyalaliswa kobushushu be-LED iye ngokuthe ngcembe ibe yingqwalasela yabantu. Oku kungenxa yokuba ubomi be-LED okanye ukubola kokukhanya kuhambelana ngokuthe ngqo nobushushu bayo beqhina. Ukuba ingxaki yokutshatyalaliswa kobushushu ayiphathwa kakuhle. 3.2 Iindlela zokunciphisa ubushushu be-LED knot Lawula amandla okufaka alinganisiweyo; Uyilo lwesakhiwo sesibini sokutshatyalaliswa kobushushu; ukunciphisa ukuchasana kobushushu phakathi kwesakhiwo sokutshatyalaliswa kobushushu besibini kunye ne-interface yofakelo lwe-LED ukuya kubuncinci; ukunciphisa ubushushu obungqongileyo; ukunciphisa LED ngokwayo ukumelana thermal. 4. Isibane se-LED semiconductor isibane somthombo wokukhanya komthombo wokushisa ubushushu Ngokuqhelekileyo, i-radiator inokwahlulwa ibe yi-passive yokuchitha ubushushu kunye nokutshatyalaliswa kobushushu obusebenzayo ngokwendlela yokususa ubushushu. Into ebizwa ngokuba yi-passive heat dissipation ibhekisa kubushushu obuveliswa ngumthombo wobushushu we-LED yomthombo wokukhanya emoyeni ngokusebenzisa isinki yobushushu. Isiphumo salo sokutshatyalaliswa kobushushu silingana nobukhulu bethebhulethi yokutshatyalaliswa kobushushu, kodwa le mpembelelo yokutshatyalaliswa kobushushu ayinelisi. Kwisixhobo, okanye ukutshatyalaliswa kobushushu bamandla aphantsi kunye nobushushu obuphantsi, uninzi lwezixhobo zithatha ukutshatyalaliswa kobushushu obusebenzayo, ukutshatyalaliswa kobushushu obusebenzayo kukuthatha ngokusebenzayo ubushushu kwi-sink yobushushu ngokusebenzisa ezinye izixhobo. Ukusebenza okuphezulu kokutshatyalaliswa kobushushu yeyona nto iphambili yokutshatyalaliswa kobushushu obusebenzayo kwaye inomthamo omncinci. Enye indlela kukwenza amacandelo e-LED ngokwamkela i-electrode "ethe nkqo". Ngenxa yokuba kukho ii-electrode zetsimbi kwiindawo eziphezulu nezisezantsi zamacandelo e-LED, oku kunokufumana uncedo olukhulu kwingxaki yokutshatyalaliswa kobushushu. Ngokomzekelo, i-GAN substrate isetyenziswa njengezinto eziphathekayo. Ngenxa yokuba i-GAN substrate yinto eqhubayo, i-electrode inokudibaniswa ngokuthe ngqo phantsi kwe-substrate ukufumana inzuzo yokusasazwa ngokukhawuleza kunye nokukhanya, kodwa ngenxa yeendleko eziphezulu zezinto eziphathekayo, le ndlela iya kuba kubiza kakhulu kuneendleko zemveli. i-sapphire substrates, eya kwandisa iindleko zemveliso yamacandelo.