Nrog rau txoj kev loj hlob ntawm LED thiab kev lag luam-tsim teeb pom kev lag luam, cov khoom lag luam thov kev siv tshuab rau tej qhov chaw hnyav. Tam sim no peb sib tham txog qhov yuav tsum tau los tiv thaiv cov teeb meem ntawm LEDs thiab circuit nyob rau hauv cov cheeb tsam hnyav xws li dej hiav txwv. Coatings thiab lwm cov tswv yim tiv thaiv tuaj yeem mob lub neej thiab kev ua tau zoo ntawm lub xeev cov teeb pom kev zoo.
Nrog rau txoj kev loj hlob ntawm LED, cov khoom muaj nqis yog qhov tseem ceeb los xyuas kom qhov kev ua tau zoo thiab kev pab cuam ntawm lub neej LED. Nyob rau hauv tsab xov xwm no, peb yuav qhia ntau txog kev siv cov LEDs hauv ntau qhov chaw thiab piav qhia txog kev tiv thaiv kom zoo nyob rau hauv cov cheeb tsam no. Txoj kev loj hlob yuav tsum ua kom ntseeg tau tias thaum ua kom tau zoo ntawm kev ua haujlwm nyob hauv lub xeev cov teeb pom kev zoo
Cov khoom kho qhov muag ntawm diffusion (UR5635) thiab pob tshab (UR5634) polyurethane resins nyob rau hauv lub nruab zog-state teeb pom kev sib txawv heev.
LED cov kev siv yog ntau dua; tus qauv tsim, qhov chaw, los yog khoom ua haujlwm yuav ua tau pov thawj tias cov teeb meem uas tau tshwm sim los ntawm cov coj tsim qauv yuav hloov. Zoo li ntau lub tshuab hluav taws xob, LEDs ua tau zoo kom txog thaum sab nraud influences pib thuam lawv cov kev ua tau zoo. Cov teebmeem no muaj xws li kev siv electrostatic attraction, tshuaj lom neeg lossis gaseous paug, thiab ntau lwm yam kev muaj plua plav, ntxooj lossis corrosive npuas. Vim li no, qhov kawg ntawm qhov yuav tsum tau ua tib zoo xav los xyuas kom meej tias cov khoom yuav raug xaiv.
Lub sijhawm thiab daim ntawv thov
LED teeb pom kev zoo vim yog txoj kev loj hlob ntawm LED nyob rau hauv qhov kev hloov ua tau, kev ua haujlwm ntev thiab kev ua haujlwm ntawm lub teeb zoo dua li daim ntawv tsom teeb. Yog li, nws yog ib qho yooj yim to taub yog vim li cas cov teeb pom kev zoo siv dav dav hauv ntau cov kev siv, xws li cov teeb vaj tse, muaj teeb pom kev zoo hauv lub hoobkas, cov huab cua marine teeb pom kev zoo thiab cov qauv tsim hluav taws xob.
Sib piv ib puag ncig hauv cov ntaub ntawv ntawm kev siv lub teeb pom kev zoo hauv lub tsev kawm ntawv yuav pab peb to taub txog cov teeb meem ntawm LED puas tsuaj. Hauv daim ntawv sau txog architectural teeb pom kev zoo, LED nws tus kheej yuav tsum tau them los ntawm tus tsim ntawm lub teeb chav tsev, los yog cov kev coj ntawm LED yuav tsuas tshwm sim rau kev hloov hauv kev kub ntxhov thiab cov av noo. Hauv cov cheeb tsam hauv marine, LED teeb yuav tsum tau txaws los yog soaked hauv brine. Tsis tas li ntawd, txhua zaus, lub neej zoo tshaj plaws ntawm lub teeb ua haujlwm ua haujlwm nyob rau hauv ib qho chaw ntsev ntsev. Cov roj ntsha muaj peev xwm ua rau corrosion ntawm Circuit Board boards (PCB), uas txo cov kev ua haujlwm sai dua li cov kev hloov pauv. Feem ntau, conformal coatings thiab encapsulation resins muab qib siab tiv thaiv hauv cov cheeb tsam no.
Kev tiv thaiv kev xaiv
Conformal txheej yog thawj qhov kev ntsuas peb tau sib tham. Qhov txheej txheem yog feem ntau raws li PCB tus qauv ntawm cov xim tho xim, muab kev tiv thaiv zoo thaum tsis tseem ceeb ntxiv rau qhov nyhav los yog ntim ntawm lub rooj tsav xwm hauv Circuit Court. Lawv feem ntau yog 25-75 microns tuab thiab yooj yim nkag tau los ntawm kev txau los yog cov txheej txheem impregnation.
Yuav kom tiv thaiv tau sab saum toj ntawm LED, lub txheej uas siv yuav tsum yog kev pom zoo thiab nyob twj ywm thoob plaws hauv lub neej ntawm qhov khoom hauv cheeb tsam yam khoom siv. Yog siv sab nraum zoov, qhov txheej txheem yuav tsum tau muaj kev ruaj ntseg zoo UV. Vim li no, qhov zoo tshaj plaws ntawm conformal txheej yog ua raws li acrylic tshuaj cov khoom uas muab kev pom tseeb thiab xim ruaj ntseg zoo li zoo txaus ntom thiab ntsev tiv thaiv kom txhob muaj ntsev. Daim duab 2 qhia txog kev tshuaj ntsuam ntsev dej, uas acrylic coatings muab kev tiv thaiv zoo heev.
Coatings raws li nyias cov tshuaj substrates tuaj yeem muab qhov sib txawv ntawm cov kev ua tau zoo thaum pom cov tshuaj tua ntsev.
Feem ntau, acrylic conformal txheej yog ib qho hnyav raws li khoom, nyob rau hauv qhov hnyav yog kua ua kua uas tso cov yeeb yaj kiab los ntawm cov ntaub ntawv los ntawm cov ntaub ntawv. Qhov hnyav siv yog qhov chaw sib xyaw ntawm cov organic (VOC). Qhov no tsis yog qhov teeb meem ntev-ntev rau ntau lub tshuab vim hais tias qhov hnyav tsuas yog tshwm sim rau ob peb feeb nyob rau hauv daim ntawv thov. Qee zaum, cov tuam txhab tsim muaj cov tseev kom muaj rau kev siv VOC-muaj cov khoom thiab lwm yam tshuaj, uas tau teev muaj nyob rau hauv phau ntawv qhia txog phau ntawv LED. Feem ntau, tshuaj sib tw tshuaj pab tshawb xyuas los txiav txim seb puas haum cov kuab kom sib haum yog tsim rau cov khoom siv tshwj xeeb.
Xim kub qhov teeb meem
Ntxiv nrog rau qhov kev cuam tshuam ntawm cov txheej ntawm lub teeb, tab sis kuj xav kom nkag siab txog kev cuam tshuam ntawm cov txheej on xim kub. Daim duab 3 qhia txog cov xim kub ntxhov (CCT) uas muaj nyob hauv LED teeb pom kev zoo. Cov xim kub hloov ntawm lub sijhawm, los yog kev kho xim xim, yog qhov teeb meem thaum xav txog hom kev tiv thaiv tawm. Nws to taub tias tsis muaj teeb meem dab tsi uas muab tso ncaj qha rau ntawm cov Crystal, yuav ua rau kev sib cuam tshuam, ua rau muaj qhov kub thiab kub kub.
LED yog nyob rau qee tus qauv kev kub ntxhov siab.
CCT cov kev hloov yog feem ntau los ntawm sov sov kom txias dua thiab sib txawv ntawm ntau hom kev coj thiab xim zones. Ntxiv mus, nws yuav txawv nyob ntawm cov khoom siv tiv thaiv. Qhov no yog lwm thaj chaw uas acrylic conformal coatings yog cov zoo dua lwm cov khoom siv tshuaj thiab cov khoom hom.
Daim duab 4 qhia txog qhov xim kub ntawm qhov xim dawb coj tuaj. Yuav kom pom tau qhov sib txawv hauv cov xim kub, nws tau raug tso tawm hauv ntau hom kev sib txawv thiab kev kho thaiv kom pom tau qhov sib txawv hauv cov xim kub. Cov kab liab qhia tias hom xim kub cawv ntawm cov xim uas siv LED, uas yog, thaum lub lag luam yog muag, nws cov xim kub yuav nyob qhov twg ntawm cov kab no.
Qhov nyias txheej thiab cov txheej coating yog qhov tsawg kawg nkaus thiab qhov siab tshaj plaws ntawm cov txheej txheem conformal, xws li 25 thiab 75 microns. Los ntawm kev thov zaj duab xis, qhov kub thiab txias ntawm lub xim yog txo thiab tswj tau hauv thaj tsam ntawm lub chaw tsim tshuaj paus LED.
Qhov zoo tshaj plaws, conformal coatings yuav siv tau rau tag nrho cov kev coj ua, raws li conformal coatings yog yooj yim siv, me me loj thiab hnyav ntawm chav teeb pom kev zoo, ntau yam kev siv, thiab cov teebmeem ntawm cov xim kub hnyiab. Txawm li cas los xij, raws li peb txhua tus paub, kev daws teeb meem feem ntau tsis muaj rau txhua daim ntawv thov. Raws li hais dhau los, conformal coatings muaj kev tiv thaiv zoo heev nyob rau hauv cov huab cua ntub dej ntsev thiab ntsev, tab sis cov txheej txhaws tsis muaj kev tiv thaiv ntau tshaj plaws hauv cov cheeb tsam uas feem ntau raus dej, chemically splashed, thiab corrosive gases. Hauv qhov no, peb xav kom peb xav txog cov ntaub ntim tshuaj los muab kev tiv thaiv ntau dua.
Txhuam hniav
Cov hlab ntim kuj tuaj yeem muaj ntau hom tshuaj lom neeg, xws li epoxy resins, polyurethane thiab silicone resins. Feem ntau, epoxy resins muab kev tiv thaiv zoo rau cov khoom siv dag zog, tab sis lawv tsis muaj qhov yooj yooj yim ntawm lwm yam tshuaj, uas tuaj yeem ua rau muaj teeb meem thaum lub sij hawm tshav kub. Tsis tas li ntawd, standard epoxy systems tsis muab kev pom tseeb thiab xim xim rau lwm lub system.
Silicone resins muaj cov nplai zoo thiab ua tau zoo ntawm huab cua sov, thaum polyurethane resins muab kev yoojyim zoo, cov ntsiab lus thiab cov theem siab tiv thaiv hauv cov cheeb tsam hnyav. Daim duab 5 qhia tau hais tias peb hom tshuaj hlais tau tshwm tuaj rau ultraviolet light 1000 teev, los ntawm kev tshuaj xyuas qhov txawv ntawm cov xim ntawm cov tshuaj ntsuab thiab cov tshuaj pleev xim ntawm cov hom tshuaj ntawm peb lub cev, uas yog qhov tseem ceeb ntawm kev ruaj ntseg ntawm txhua cov tshuaj ntsuab nyob rau sab nraum zoov. Nyob rau hauv daim duab no, cov tshuaj reagent thiab cov polyurethane resins kom meej meej rau qhov standard epoxy system.
Environmental raug
Sib piv cov khoom ntawm ntau yam hauv cov cheeb tsam hnyav, thiab cia cov neeg xaiv lawv cov khoom raws li lawv qhov kev siv zaum kawg. Piv txwv, daim duab. 6 qhia tau hais tias qhov tshwm sim ntawm cov pa roj paug rau acrylic conformal coatings, polyurethane resins thiab silicone resins. Los ntawm kis peb mus rau qhov chaw ua roj, qhov luminous flux feem pua ntawm cov roj yog txo. Cov ntsiab lus no qhia meej meej txog qhov tseem ceeb ntawm kev xaiv qhov khoom kom zoo rau ib puag ncig. Txawm hais tias tus conformal txheej hauv corrosive roj ib puag ncig deg rwb thaiv tsev tsis kam yuav tsis deteriorate, tab sis rau cov LED, nws tsis tag nrho tiv thaiv cov LED, vim nws tso cai rau cov roj los ntawm nyias txheej thiab nkag mus rau LED, kom dhau sijhawm, nws cov kev kawm yog txo.
Silicone resins muaj cov teebmeem zoo li no; li cas los xij, qhov no, txawm tias qhov kev tiv thaiv txheej txheem yog tuab heev (2 hli piv rau 50 microns), cov roj tseem muaj peev xwm dhau los ntawm cov tshuaj ntsuab thiab cuam tshuam rau lub LED. Thaum koj sib piv tau cov khoom ntawm silicone thiab polyurethane, nws yog qhov tseeb tias cov khoom ntawm ob hom tshuaj no sib txawv vim hais tias silicone resins yog permeable mus rau roj, thaum polyurethane resins ntawm tib thickness tsis. Nyob rau hauv rooj plaub no, optically pob tshab polyurethane resins, xws li Electrolube UR5634, yog cov khoom siv tiv thaiv zoo tshaj plaws los tiv thaiv cov roj ntsha corrosive los ntawm kev cuam tshuam cov LEDs.
Polyurethane resins yuav pom tau tias yuav tsim cov resins rau kev tiv thaiv ntawm LEDs hauv ntau qhov chaw sib txawv. Tsis tas li ntawd, lawv tuaj yeem hloov kho kom zoo dua, xws li ib qho xim rau kev npog lub PCB, tiam sis tsis tshaj li qhov siab siab. Qhov ream rau kev tiv thaiv ntawm PCB, tsis yog tsuas yog ua kom cov pleasing deg, tab sis kuj los ntawm lub teeb los ntawm PCB los cuam tshuam thiab nce lub teeb tso zis, yog li txhim kho kev ua haujlwm ntawm teeb pom kev zoo. Kuj tseem muaj cov pob zeb tshwj xeeb uas siv los siv lub teeb ci. Cov resins xws li Electrolube UR5635, piv txwv li, muab ob qho kev daws teeb meem: tsis pub muaj kev cuam tshuam kev ua pa thiab sib kis ntawm qhov kaj, yog li koj tsis tas yuav yuav ib lub voj voos ntim cua lossis lub teeb txawb.
Kev Tiv Thaiv Ntaub Ntawv
Nws yog qhov tseeb tias tus txheeb ze tau muab kev tiv thaiv nyob rau hauv ib cheeb tsam ntawm ntau qhov chaw thiab muaj peev xwm raug yoog raws li daim ntawv thov los ntawm kev xaiv hom tshuaj lom neeg los yog ib hom tshuaj ua tshiab. Txawm li cas los, nyob rau hauv pem hauv ntej, peb tau sib tham txog cov nyhuv ntawm cov film thin conformal txheej ntawm xim kub yog heev me me. Thaum muab piv rau ntawm lub conformal txheej nrog lub sealing rein, nws yog pom tseeb hais tias kev tiv thaiv theem ntawm lub rein yog nce ntau vim hais tias nws muaj peev xwm ua tau ntau ntxiv lo. Lub pob txha nqaj tuaj yeem muaj peev xwm nce tau ntawm qhov tob ntawm 1-2 hli los yog tob, tab sis qhov tob no tseem yuav muaj kev ntxim siab ntawm qhov kev ntsuas xim kub.
Daim duab 7 qhia tau hais tias qhov kub xim kub ntawm LEDs nrog ntau hom tuab ntawm polyurethane cob. Obviously, lub thickness yog ncaj qha ntsig txog cov xim ntawm cov xim kub offset, yog li no yog ib qho tseem ceeb saib xyuas thaum xaiv cov khoom siv kev tiv thaiv. Peb paub tias cov xim kub offset yuav tshwm sim, tab sis coj mus rau hauv tus account repeatability ntawm qhov offset LED. Yog hais tias qhov offset no, koj tuaj yeem rov ua dua tus thawj coj xim kub.
Tsab xov xwm no tham txog cov kev xav tau xav tau los xaiv qhov kev tiv thaiv ntawm lub nruab. Soj ntsuam xyuas qhov chaw yog qhov tseem ceeb rau txoj kev xaiv tau zoo ntawm qhov khoom, txawm tias nws yog qhov kev siv zaum kawg lossis kev ua tiav ntawm kev tsim cov txheej txheem. Conformal coatings tsis yog yooj yim siv thiab haum rau tsim, tab sis kuj muaj kev tiv thaiv zoo heev nyob rau hauv cov huab cua ntub dej ntsev thiab ntsev. Vim tias lawv cov thickness tsis tshua, lawv kuj muaj me ntsis ntxim rau cov xim kub.
Thaum cov neeg mob nyuab siab dua, nws raug nquahu kom koj hloov mus rau ib lub hwj huam tuaj. Hauv qhov no, txoj kev xaiv ntawm hom tshuaj lom neeg yuav txiav txim siab los ntawm kev siv zaum kawg thiab qhov kev cuam tshuam ib puag ncig. Tsis tas li ntawd, lub thickness ntawm daim duab yuav tsum ntxiv yuav tsum muab suav hais tias yuav tsum muaj kev tiv thaiv txaus tsim nyog thaum txo cov nyhuv ntawm cov xim kub hloov.
