Ko e Paradox ʻo e LED Lelei ʻOku Lele Vela

Ko ha meʻa angamaheni ia ʻoku puputuʻu ai ʻa e tokolahi ʻo e kau fakatau pea naʻa mo e kau palofesinale ʻe niʻihi: ʻOku fakafiefiaʻi ʻa e ngaahi maama LED ʻi heʻenau ivi lelei ʻaupito, ka ʻi he hili ʻenau fakamoʻui ʻi ha kiʻi taimi, ʻoku ʻikai toe fakaʻikaiʻi ʻa e vela ʻo e vela ʻi he ala ki ai. Kapau ʻoku fakahaofi ʻe he LED ha ʻuhila lahi ʻi hono fakafehoanaki ki ha foʻi ʻuhila motuʻa, ko e ha ʻoku kei fakatupu ai ha vela lahi? Ko e taha ʻeni ʻo e ngaahi fehuʻi ʻoku lahi taha hono ʻeke ʻi he mamani ʻo e mama. ʻOku ʻikai maʻu ʻa e tali ʻi he ivi fakakatoa ʻoku fakaʻaongaʻi, ka ʻi he tefitoʻi fisiki ʻo e founga ʻoku faʻu ai ʻa e mama pea mahuʻinga taha, ʻa e founga ʻoku ʻikai ke faʻu ai. Ke mahino ʻa e ʻuhinga ʻe lava ke ongoʻi vela ai ha LED 15-watt ʻo hange ko ha 60-watt incandescent, ʻoku fie maʻu ke tau fekumi ki he ngaahi fakakaukau ʻo e ola lelei ʻo e fakaului ʻo e mama, ʻa e ngaahi founga kehekehe ʻo e ivi (mama mo e vela), pea mo e fatongia mahuʻinga ʻo e puleʻi ʻo e mafana ʻo e ʻea ʻi he ngaahi meʻa fakaʻilekitulonika ʻo onoponi. ʻE vete ʻe he fakahinohino fakaʻauliliki ko ʻeni ʻa e misiteli ʻo e vela ʻo e LED, fakamatalaʻi ʻa e saienisi ʻi ha ngaahi lea faingofua mo fakamamafaʻi ʻa e ʻuhinga ʻoku ʻikai ko ha fehalaaki ʻa e dissipation totonu ʻo e vela, ka ko ha konga ia ʻo e palani LED tuʻunga maʻolunga.

ʻOku lelei fefe ʻa e ngaahi maama LED ʻi hono fakafehoanaki ki he ngaahi tekinolosia motuʻa ange?

Ke fakahoungaʻi ʻa e vela ʻo ha LED, kuo pau ke tau tomuʻa fakafehoanaki ʻa hono lavameʻa ki hono ngaahi maama kimuʻa: incandescent mo compact fluorescent lights (CFLs). Ko e meʻafua angamaheni ki he meʻa ni ko e maama lelei, fua ʻi he lumens per watt (lm/W), ʻa ia ʻoku ne talamai ʻa e lahi ʻo e maama ʻoku tau maʻu ki he ʻiuniti takitaha ʻo e ʻuhila ʻoku fakaʻaongaʻi. ʻOku ʻiloa ʻa e ngaahi foʻi ʻuhila angamaheni ʻoku ʻikai ke nau ʻaonga. ʻOku ʻi ai ha maama maama angamaheni ʻoku ʻaonga pe ʻi he 15 ki he 18 lumens ki he watt. ʻOku ʻuhinga ʻeni ko ha foʻi ʻuhila 60W, ko ha ivi lahi—laka hake ʻi he 95%—ʻoku liliu fakahangatonu ia ki he vela (infrared radiation), pea ko ha kiʻi konga siʻi pe, fakafuofua ki he 3%, ʻoku ne ʻomi ʻa e maama ʻoku tau sio ki ai. Ko e CFLs, pe ngaahi foʻi ʻuhila fakahaofi ivi, ko ha sitepu mahuʻinga ia ki muʻa, ʻo aʻusia ha ola lelei ʻo e 50 ki he 60 lumens ki he watt. ʻOku nau liliu ʻa e 20-25% ʻo e ʻuhila ki he maama ʻoku ʻasi mai, ʻa ia ko e ʻuhinga ia ʻoku nau mokomoko ange ai ʻi he incandescents ki he maama tatau. Neongo ia, ko e LEDs ʻa e kau hau lolotonga ʻo e lavameʻa. ʻOku aʻusia ʻe he ngaahi maama LED tuʻunga maʻolunga he taimi ni ʻa e ola lelei ʻo e 130 ki he 160 lumens ki he watt pe maʻolunga ange. ʻOku ʻuhinga ʻeni ʻoku nau liliu ʻa e fakafuofua ki he 30% ki he 40% ʻo e ivi fakaʻuhila ki he maama ʻoku ʻasi mai. Ko ha fakalakalaka fakaofo ʻeni, ka ʻoku kei toe pe ha konga mahuʻinga—60% ki he 70%—ʻo e ivi kuo pau ke ʻalu ki ha feituʻu, pea ko e "feituʻu" ko e vela.

Ko e ha ʻoku vela ai ha LED 15-watt kapau ʻoku fuʻu lelei?

Ko e uho ʻeni ʻo e paradox. ʻOku mahino ʻoku lelei ange ʻa e LED 15-watt ʻoku ne ʻomi ʻa e maama tatau mo e 60-watt incandescent. Neongo ia, ko e meʻa mahuʻinga ke vakai ki he lahi ʻo e vela ʻo e veve. ʻOku maʻu ʻe he foʻi ʻuhila ʻa e watts ʻe 60, ʻa ia ʻoku ne fakatupu ha fuʻu watts ʻe 57 ʻo e vela ʻo e veve, ka ʻoku fakamafola ʻa e vela ko ʻeni ʻi ha funga feituʻu lahi (ʻa e foʻi ʻuhila sioʻata kotoa) pea ko e meʻa mahuʻinga taha, ʻoku tuku atu ia ko e radiation infrared. ʻOku mavahe ʻa e vela infrared ko ʻeni mei he foʻi ʻuhila, ʻo fakamafanaʻi ʻa e loki ka ʻoku ʻikai ke ne ʻai ke fuʻu vela ʻaupito ʻa e foʻi ʻuhila ʻi ha feituʻu, neongo ʻoku kei vela ʻaupito. ʻI he tafaʻaki ʻe taha, ʻoku siʻisiʻi ange ʻa e vela ʻo e veve ʻi he 15-watts—fakafuofua ki he watts ʻe 10 (talu mei he hoko ʻa e watts ʻe 5 ko e mama). Ko e palopalema he ko e watts ʻe 10 ko ʻeni ʻo e vela ʻoku faʻu ia ʻi ha kiʻi konga semiconductor siʻisiʻi, siʻisiʻi ange ʻi ha ngeʻesi nima. ʻOku fakatupu ʻe he meʻa ni ha fuʻu vela maʻolunga ʻaupito, pe ko e lahi ʻo e ivi vela, ʻi ha feituʻu siʻisiʻi. Kapau ʻoku ʻikai vave ʻa e mafana ʻo e ʻea ko ʻeni mei he chip, ʻe vave ange ʻa e mafana ʻo e fetaulakiʻanga LED ʻi ha sekoni, ʻo iku ki he maumau mo e maumau he taimi pe ko ia. Ko ia ai, ko e vela ʻoku ke ongoʻi ʻi ha maama LED ko ha fakamoʻoni ia ʻo ʻene lavameʻa ʻi hono tohoakiʻi ʻa e vela ko ia mei he ngaahi meʻa fakaʻilekitulonika pelepelengesi pea tukuange ia ki he ʻea takatakai. ʻOku fai ʻe he heat sink ʻene ngaue, pea ko e foʻi moʻoni ko ia ʻoku ongoʻi vela ʻoku ʻuhinga ia ʻoku ngaue ʻa e founga puleʻi ʻo e mafana ke maluʻi ʻa e LED.

Ko e ha ʻa e saienisi ʻi mui ʻi he faʻu ʻo e vela ʻo e LED?

Ko e vela ʻoku fakatupu ʻe ha LED ʻoku ʻikai ko ha ola ia ʻo e ʻikai lelei hono ngaohi ʻo e maama ʻi he founga tatau pe mo e incandescent. ʻI ha foʻi ʻuhila vela, ko e vela (infrared radiation) ko ha konga mahuʻinga ia ʻo e founga hono faʻu ʻo e mama; ʻoku fakamafanaʻi ʻa e filo kae ʻoua kuo ulo mai, ʻo maʻu ai ha tuʻunga lahi ʻoku kau ai ʻa e maama ʻoku ʻasi mai mo ha fuʻu infrared ʻoku ʻikai lava ʻo sio ki ai. ʻOku ngaue ʻa e LED ʻi ha tefitoʻi moʻoni kehe ʻaupito ʻoku ui ko e electroluminescence. ʻI he taimi ʻoku fou atu ai ha ʻuhila ʻi ha naunau semiconductor (ko e diode), ʻoku ne fakaʻaiʻai ʻa e electrons. ʻI he taimi ʻoku foki ai ʻa e ngaahi electrons ko ʻeni ki honau tuʻunga angamaheni, ʻoku nau tukuange ʻa e ivi ʻi he fotunga ʻo e photons—ko e ngaahi momoʻi meʻa ʻo e mama. Ko e lanu, pe wavelength, ʻo e maama ko ʻeni ʻoku fakapapauʻi ia ʻe he ngaahi ʻulungaanga ʻo e naunau semiconductor. ʻOku lelei ange ʻa e founga ko ʻeni ʻi hono faʻu ʻo e maama ʻoku ʻasi mai. Neongo ia, ʻoku ʻikai ke 100% lelei. ʻOku fetaulaki foki ʻa e ngaʻunu ʻa e electrons ʻi he semiconductor mo e resistance, ko ha meʻa ʻoku ʻiloa ko e fakafepaki fakaʻuhila. ʻOku liliu ʻe he fakafepaki ko ʻeni, fakataha mo e ngaahi founga kehe ʻoku ʻikai ke radiative recombination ʻi he naunau, ha konga ʻo e ivi fakaʻuhila fakahangatonu ki he vela (phonons, pe lattice vibrations) ʻi loto ʻi he LED chip. ʻOku ui ʻeni ko e mafana ʻo e Joule. Ko ia, neongo ʻoku lelei ʻa e founga ʻo e maama, ʻoku fakatupu ʻe he fisiki ʻo hono ʻave ʻo e ʻuhila ʻi ha naunau ʻa e vela ʻi he tupuʻanga.

Ko e ha ʻoku ʻikai lava ai ʻe he LEDs ʻo fakaʻaliʻali ʻa e vela ʻo hange ko e ngaahi foʻi ʻuhila vela?

Ko ha faikehekehe mahuʻinga ʻeni ʻi he vahaʻa ʻo e ngaahi tekinolosia motuʻa mo e maama foʻou. ʻOku ngaue ʻa e ngaahi foʻi ʻuhila vela ʻi he mafana maʻolunga ʻaupito (ʻe lava ke aʻu ʻa e filament ʻo laka hake ʻi he 2,500°C). ʻI he mafana ko ʻeni, ʻoku nau tuku mai ha konga lahi ʻo honau ivi ko e infrared radiation, ʻa ia ko ha faʻahinga maama ʻoku tau ongoʻi ko e vela. Ko ha founga lelei ʻaupito ʻeni ke feʻaveʻaki ʻaki ʻa e ivi mei he maʻuʻanga tokoni ʻo ʻikai fie maʻu ha tataki fakatuʻasino. ʻOku malama pe ʻa e vela ʻi he sioʻata ki he ʻatakai. Ka neongo ia, ʻoku fakataumuʻa ʻa e LEDs ke ngaue ʻi he mafana maʻulalo ange, angamaheni ʻaki ʻa e mafana taha ʻo e fetaulakiʻanga ʻo e 85°C ki he 150°C. ʻI he mafana maʻulalo ko ʻeni, ʻoku ʻikai ke nau tuku mai ha radiation infrared lahi. He ʻikai lava ke hola ʻa e vela ʻoku faʻu ʻi loto ʻi he LED chip; kuo pau ke fakahoko ia ʻi he fetuʻutaki fakaesino. Ko e feituʻu ʻeni ʻoku hu mai ai ʻa e heat sink. ʻOku fokotuʻu ʻa e LED chip ʻi ha naunau ʻo e fetuʻutaki mafana ʻo e ʻea, ʻa ia ʻoku fakapipiki ki ha ukamea ukamea kuo paaki ʻa e circuit board (MCPCB), ʻa ia ʻoku fakapipiki leva ki ha fuʻu meʻa vela ʻo e ukamea. ʻOku fakataumuʻa ʻa e hala kotoa ko ʻeni ke ne taki ʻa e vela mei he chip ʻo fakafou ʻi he ngaahi naunau fefeka. ʻOku fakaʻaongaʻi leva ʻe he heat sink ʻa hono funga lahi mo e ngaahi fini ke ʻave ʻa e vela ko ia ki he ʻea ʻo fakafou ʻi he convection. Ko ia, ʻoku ʻikai ke "vela" ʻa e LEDs ʻi he founga tatau mo e incandescents; ʻoku siʻisiʻi ange ʻa e vela fakakatoa, ka ʻoku tokanga taha ʻa e vela ko ia pea fie maʻu ha hala fakaʻofoʻofa ke hao ai, ʻa ia ko e ʻuhinga ia ʻoku fie maʻu ai ha meʻa mahuʻinga ʻo ha maama LED malohi maʻolunga.

Ko e ha e meʻa ʻe hoko kapau ʻoku fuʻu vela ʻa e LED?

Ko e vela ʻa e fili fika ʻuluaki ʻo e ngaue mo e moʻui loloa ʻa e LED. ʻOku ʻikai hange ko e ngaahi foʻi ʻuhila ʻoku ʻikai lava ʻaupito, ka ʻoku fakavaveʻi ʻe he vela ʻa e holoa ko ʻeni. Ko e ola vave taha ʻo e fuʻu vela ko e fakasiʻisiʻi ʻo e mama, ko ha meʻa ʻoku ʻiloa ko e holoki ʻo e lumen. ʻI he maʻolunga ange ʻa e mafana ʻo e fetaulakiʻanga LED, ʻoku holo ʻa e lavameʻa ʻo e quantum ʻi loto, ʻa ia ko hono ʻuhinga ʻoku siʻisiʻi ange ʻa e ngaahi photons ki he lahi tatau ʻo e ʻuhila. Ko e ʻuhinga ʻeni te ke fakatokangaʻi ai ʻoku kiʻi poipoila ʻa e maama LED ʻi heʻene mafana. Ko e meʻa mahuʻinga ange, ʻoku fakatupu ʻe he mafana ʻo e ʻea ʻa e maumau tuʻuloa. ʻE lava ke holoki ʻe he vela ʻa e phosphor coating ʻoku fakaʻaongaʻi ʻi he LED hinehina ke liliu ʻa e maama lanu pulu ki ha tuʻunga kakato, ʻo fakatupu ha liliu ʻi he mafana ʻo e lanu ʻi ha vahaʻa taimi. ʻE lava ke maumau ʻa e naunau semiconductor ʻiate ia pe, ʻo iku ki he lahi ange ʻo e fakafepaki mo e faʻu ʻo e vela lahi ange ʻi ha siakale fakaʻauha. ʻE lava ke vaivai ʻa e ngaahi haʻi ʻoku ne pukepuke ʻa e LED chip ki hono substrate, ʻo iku ki he maumau fakaesino. Ko hono aofangatuku, ʻe lava ke fakasiʻisiʻi ʻe he puleʻi kovi ʻo e mafana ʻo e ʻea ʻa e moʻui ʻa ha LED mei he houa ʻe 50,000+ ki ha ngaahi houa siʻi pe ʻe lauiafe, ʻo fakaʻikaiʻi ai hono tefitoʻi lelei. Ko e ʻuhinga ʻeni ʻoku lahi ai ʻa e ngaahi kautaha faʻu koloa ʻi he palani ʻo e mafana ʻo e ʻea, fakapapauʻi ʻoku lahi feʻunga ʻa e meʻa vela pea ʻoku ʻi ai ha hala mahino mo maʻulalo ke tafe atu ʻa e vela mei he chips pelepelengesi.

Founga ke Puleʻi mo Dissipate ʻa e ʻEa ʻi he Ngaahi Polokalama LED

ʻOku ʻikai ko ha meʻa ia ʻoku hoko ʻi he palani ʻo e LED ʻa hono puleʻi lelei ʻo e mafana ʻo e ʻea; ko ha konga mahuʻinga ia ʻo e founga ngaue fakaʻenisinia. ʻOku kau ai ha founga ʻoku ʻi ai ha ngaahi sitepu kehekehe ke ʻave ʻa e vela mei he fetaulakiʻanga ki he ʻea ʻatakai. Ko e ʻuluaki sitepu ko e conduction. ʻOku soldered pe haʻi ʻa e LED chip ki ha substrate, ʻo faʻa fakaʻaongaʻi ha "naunau fengaueʻaki mafana ʻo e ʻea" ke fakafonu ʻaki ʻa e fanga kiʻi ava ʻo e ʻea ʻa ia ʻe lava ke ne insulate ʻa e vela. Ko e substrate ko ʻeni ʻoku angamaheni ʻaki ko ha Metal Core Printed Circuit Board (MCPCB), ʻa ia ʻoku ʻi ai ha konga manifi ʻo e naunau dielectric ʻi ha fakavaʻe aluminium pe kopa, ʻo fakaʻata ʻa e vela ke mafola vave. Mei he MCPCB, ʻoku ʻalu ʻa e vela ki he heat sink. Ko e heat sink ko e konga mahino taha ia ʻo e founga puleʻi ʻo e mafana ʻo e ʻea. ʻOku mahuʻinga ʻene fokotuʻutuʻu. ʻOku faʻa ngaohi ia mei he ʻalaminiume, ʻa ia ʻoku maʻamaʻa pea ʻoku lelei ʻa e conductivity ʻo e mafana ʻo e ʻea, pea ʻoku faʻu ʻaki ha ngaahi fins pe pine lahi. ʻOku fakalahi ʻe he ngaahi kapa ko ʻeni ʻa e feituʻu ʻoku fetuʻutaki ai mo e ʻea. Ko e tuʻunga fakaʻosi ko e convection, ʻa ia ʻoku hiki ai ʻa e vela mei he ngaahi fini ki he ʻea ʻoku ngaʻunu. ʻOku fakafalala ʻeni ki he tafe ʻa e ʻea fakanatula, ʻa ia ʻoku ʻalu hake ai ʻa e ʻea vela pea fetongi ʻaki ʻa e ʻea mokomoko ange. Ki he LED malohi ʻaupito, hange ko ia ʻoku fakaʻaongaʻi ʻi he ngaahi maama ʻo e malaʻe vaʻinga, ʻoku ʻikai feʻunga ʻa e fakamokomokoʻi ʻo e ʻea, ko ia ʻoku fakaʻaongaʻi ʻa e fakamokomokoʻi malohi mo e kau poupou ke fakamalohiʻi ʻa e ʻea ʻi he ngaahi fins, ʻo fakalahi ʻaupito ʻa e feʻaveʻaki vela ʻo e convective. ʻOku aʻu ʻo fakaʻaongaʻi ʻe he ngaahi polokalama maʻolunga ʻe niʻihi ʻa e paipa vela pe huhuʻa mokomoko ke feʻaveʻaki lelei ange ʻa e vela.

Ko e ha e fatongia ʻo e heat sink ʻi he ngaue ʻa e LED?

Ko e heat sink ko e konga mahuʻinga taha ia ʻo ha maama LED hili ʻa e LED chip. Ko ʻene ngaue ke ʻomi ha naunau lahi ke ne maʻu ʻa e vela pea mo ha feituʻu lahi ke toʻo atu ia. ʻOku fakapapauʻi fakahangatonu ʻe he lahi, naunau mo e geometry ʻo e heat sink ʻa e malava ʻa e mama ke tauhi ha mafana ʻo e ngaue ʻoku malu. Mahalo ʻe maʻamaʻa ange hono ngaohi ʻo ha kiʻi meʻa siʻisiʻi mo maʻamaʻa, ka ʻe vave ʻene fonu ʻi he vela, ʻo iku ki ha mafana maʻolunga ʻo e fetaulakiʻanga LED, siʻisiʻi ʻa e mama, pea fakanounouʻi ʻa e moʻui. ʻOku fakapapauʻi ʻe ha meʻa fakaʻofoʻofa kuo fokotuʻutuʻu lelei, neongo kapau ʻe tanaki atu ki he fakamole mo e mamafa ʻo e meʻa ʻoku fie maʻu, ʻe lava ke ngaue ʻa e LED ʻi he tuʻunga lelei naʻe fokotuʻutuʻu pea tolonga ʻi hono moʻui kakato. Kuo pau foki ke fokotuʻutuʻu ʻa e ngaahi fini ʻo e heat sink ke lava ʻo tafe tauʻataina ʻa e ʻea, koeʻuhi ke ʻoua naʻa fuʻu vaofi kinautolu, pea kuo pau ke fakaʻata ʻe he ʻatakai ʻo e mama ke ʻea ʻa e ʻea. ʻE lava ʻe hono ʻufiʻufi ʻo ha maama LED pe fokotuʻu ia ʻi ha meʻa ʻoku tapuni mo ʻikai ʻea ʻo fakaʻauha ʻa e ʻea mokomoko ʻo fakatupu ai ʻa e vela ʻo e LED. Ko ia ai, ʻi he taimi ʻoku fili ai ha koloa LED, ko e tuʻunga lelei mo e lahi ʻo hono heat sink ko ha ngaahi fakaʻilonga fakahangatonu ia ʻo e tukupa ʻa e kautaha naʻa nau ngaohi ki he ngaue mo e moʻui fuoloa. Ko e vela vela ko ha fakaʻilonga ia ʻoku ne tohoakiʻi lelei ʻa e vela mei he chip; ʻE lava ke ʻuhinga ʻa e vela mokomoko ʻoku fihia ʻa e vela ʻi loto, ʻa ia ko ha founga ia ke ʻikai ola lelei ai kimuʻa.

Mafana mo e Lavameʻa ʻi he Ngaahi Tekinolosia ʻo e Maama

Ke sioloto atu ki he ngaahi faikehekehe ʻi he faʻu ʻo e vela mo e lavameʻa, ʻoku fakafehoanaki ʻe he tepile ko ʻeni ʻa e 60W incandescent, 15W CFL, mo e 12W LED, ʻoku meimei tatau pe ʻa e lahi ʻo e maama (fakafuofua ki he 800 lumens).

ʻOku fakahaaʻi mahino ʻe he fakafehoanaki ko ʻeni neongo ʻoku siʻisiʻi taha ʻa e vela ʻoku ʻomi ʻe he LEDs, ko e founga ʻo e dissipation ʻo e vela (conduction via a heat sink) ko e meʻa ia ʻoku ne ʻai ke nau ongoʻi mafana ʻi he ala, ko ha fakaʻilonga ia ʻo e ʻenisinia lelei ʻo e mafana ʻo e ʻea.

Ko e ha ʻa e kahaʻu ki he lavameʻa mo e vela ʻo e LED?

ʻOku teʻeki ai ke ʻosi ʻa e fononga ʻa e tekinolosia LED. ʻOku hokohoko atu ʻa e ngaue ʻa e kau fakatotolo mo e kau ʻenisinia ke fakaleleiʻi ʻa e tefitoʻi lavameʻa ʻo e LEDs, teke ʻa e ngaahi fakangatangata ʻo e meʻa ʻoku malava. ʻI he lolotonga ni, naʻa mo e LED lelei taha ʻoku nau liliu pe ʻa e 30-40% ʻo e ivi fakaʻuhila ki he maama ʻoku ʻasi mai. ʻOku mole ʻa e toenga ko e vela. ʻOku ʻi ai ha teke fakasaienisi mahuʻinga ke mahino mo toʻo ʻa e ngaahi founga ʻoku ʻikai ko e radiative recombination ʻi he semiconductor ʻoku ne fakatupu ʻa e ngaahi mole ko ʻeni. ʻOku palomesi ʻa e fakalakalaka ʻi he saienisi ʻo e ngaahi naunau, hange ko hono fakaʻaongaʻi ʻo e gallium nitride ʻi he silikoni substrates mo e ngaahi tekinolosia foʻou ʻo e quantum dot, ke fakalahi ʻa e lavameʻa ʻo e quantum ʻi loto ʻo e LEDs. ʻOku maʻolunga ange ʻa e lahi taha ʻo e fakakaukau ki ha LED hinehina, ʻe lava ke laka hake ʻi he 50% pe 60% lavameʻa. ʻI he fakalakalaka ʻa e lavameʻa ko ʻeni, ʻe siʻisiʻi ange ʻa e ivi ʻe liliu ki he vela ʻi he lahi tatau ʻo e mama. ʻOku ʻuhinga ʻeni ʻe fie maʻu ʻe he LEDs ʻi he kahaʻu ha fanga kiʻi meʻa siʻisiʻi ange mo siʻisiʻi ange ʻa e mafana ʻo e ʻea ke puleʻi ʻaki ʻa e kavenga mafana ʻoku siʻ ʻOku tau ʻosi sio ki he huʻunga ko ʻeni ʻi he fakalakalaka ʻo e chip-on-board (COB) LEDs mo e ngaahi fakaʻuli lelei ange. Ko e taumuʻa taupotu taha ko ha maʻuʻanga maama ʻoku ne liliu ʻa e konga lahi ʻo hono ivi ki he maama ʻoku tau sio ki ai, pea ko e mafana ʻo e ʻea ko ha meʻa siʻisiʻi pe. Kae ʻoua kuo aʻu ki he ʻaho ko ia, ko e mahino mo e fakaʻapaʻapaʻi ʻo e ngaahi fie maʻu ki hono puleʻi ʻo e mafana ʻo e ʻea ʻo e tekinolosia LED lolotonga, ko e ki ia ke fiefia ʻi heʻenau moʻui fuoloa mo e ngaahi lelei ʻo e fakahaofi ivi.

Ngaahi Fehuʻi ʻOku Faʻa ʻEke Fekauʻaki mo e LED Heat

ʻOku angamaheni pe ke vela ʻa e foʻi ʻuhila LED ʻi he ala ki ai?

ʻIo, ʻoku angamaheni pe ke mafana pe vela ʻa e fakavaʻe pe meʻa vela ʻo ha foʻi ʻuhila LED. ʻOku fakahaaʻi heni ʻoku lava lelei ʻe he heat sink ʻo tohoakiʻi ʻa e vela mei he LED chip. Neongo ia, ʻoku ʻikai totonu ke fuʻu vela ke ne fakatupu ʻa e mamahi ʻi he taimi ʻoku ala nounou ai. Kapau ʻoku fuʻu vela ʻaupito, mahalo ʻoku ʻi ha meʻa ʻoku ʻikai lelei ʻa e ʻea pe ʻoku maumau ʻa e foʻi ʻuhila.

ʻE lava nai ʻe ha foʻi ʻuhila LED ʻo fakatupu ha vela?

Neongo ʻoku ngaue ʻa e ngaahi foʻi ʻuhila LED ʻi ha mafana maʻulalo ange ʻi he ngaahi foʻi ʻuhila vela, ʻe kei lava pe ke hoko ia ko ha vela fakatuʻutamaki kapau ʻoku ʻikai lelei honau tuʻunga lelei, ʻoku ʻi ai ha fakaʻuli ʻoku maumau, pe ʻoku fakaʻaongaʻi ia ʻi ha founga ʻe taʻofi ai ʻa e vela. Hange ko ʻeni, ʻe lava ke fuʻu vela ʻa hono ʻufiʻufi ha foʻi ʻuhila LED pe fakaʻaongaʻi ia ʻi ha meʻa ʻoku ʻikai ke ʻea ʻa ia ʻoku ʻikai fakafuofuaʻi. Muimui maʻu pe ki he ngaahi fakahinohino ʻa e kautaha naʻa nau ngaohi ʻa e koloa pea kumi ha ngaahi koloa kuo fakamoʻoniʻi.

ʻE anga fefe haʻaku ʻai ke tolonga fuoloa ange ʻeku ngaahi maama LED?

Ko e founga lelei taha ke fakaloloa ʻa e moʻui ʻo hoʻo ngaahi maama LED ko hono puleʻi ʻenau vela. Fakapapauʻi ʻoku fokotuʻu kinautolu ʻi ha ngaahi naunau ʻe lava ke tafe feʻunga ʻa e ʻea ʻi he heat sink. ʻOua naʻa faʻo kinautolu ʻi ha fanga kiʻi feituʻu iiki ʻoku ʻikai ke ʻi ai ha ʻea tuku kehe kapau ʻoku fakataumuʻa pau ki he taumuʻa ko ia. Ko hono fili ʻo e LEDs tuʻunga maʻolunga mei he ngaahi kautaha falalaʻanga, ʻa ia ʻoku lelei ange ʻa e faʻufaʻu ʻo e mafana ʻo e ʻea, ʻoku toe mahuʻinga foki ia ki he moʻui fuoloa.