Ko e Mana ʻo e Maama LED Tunable

Kuo mahulu atu ʻa e maama LED ʻo onoponi ʻi he ngaue faingofua ʻo e mama. ʻI he ʻaho ni, ʻoku ʻikai ngata pe ʻi heʻetau lava ʻo liliu ʻa e ngingila ʻo ha mama ka ko e lanu pe "mafana" ʻo e maama ʻoku ne ʻomai. Kuo liliu ʻe he malava ko ʻeni ke fakatonutonu ʻa e maama mo e mafana ʻo e lanu ki he faʻufaʻu ʻo e mama, ʻo fakaʻata ai ʻa e ngaahi ʻatakai longomoʻui ʻe lava ke liliu mei ha maama ʻo e ʻaho mokomoko ki he ngaue ki ha maama fakafiemalie mo mafana ki he malolo efiafi. Ka ʻoku anga fefe ʻa e ngaue ʻa e liliu ngali faingofua ko ʻeni? ʻOku ʻi lalo ʻi he funga ʻo ha foʻi ʻuhila LED pe naunau ʻoku ʻi ai ha fakatahaʻi fakaʻofoʻofa ʻo e fisiki, fakaʻilekitulonika, mo e saienisi ʻo e naunau. Ko e ngaahi tefitoʻi moʻoni ʻoku ne puleʻi ʻa e ngaahi liliu ko ʻeni—tuifio ʻa e LED spectra kehekehe ki he mafana ʻo e lanu mo hono fakaʻaongaʻi ʻo e pulse width modulation (PWM) ki he ngingila—ko e ngaahi ki ia ki he mahino ʻa e versatility ʻo e maama ʻo onoponi. ʻE fakamatalaʻi ʻe he fakahinohino ko ʻeni ʻa e ngaahi tekinolosia ko ʻeni, ʻo fakamatalaʻi ʻa e ngaahi fakakaukau ʻo e mafana ʻo e lanu, fakafekauʻaki ʻa e mafana ʻo e lanu (CCT), mo e fakaʻilekitulonika ʻo e PWM dimming ʻi ha founga ʻoku fakatou lava ke maʻu mo tonu fakatekinikale.

Ko e ha ʻa e mafana ʻo e lanu ʻo e LED pea ʻoku anga fefe hono liliu?

Ko e mafana ʻo e lanu ko ha founga ia ke fakamatalaʻi ʻaki ʻa e lanu ʻulungaanga ʻo e maama ʻoku ʻasi mai mei ha maʻuʻanga tokoni. ʻOku ʻikai ʻuhinga ia ki he vela fakatuʻasino ʻo ha mama, ka ko e mafana pe mokomoko ʻo e mama. ʻOku makatuʻunga ʻa e tefitoʻi moʻoni ʻi he fisiki ʻo ha meʻa ʻoku ui ko e "radiator ʻo e sino ʻuliʻuli." ʻI he taimi ʻoku vela ai ha sino ʻuliʻuli, ʻoku ulo ia ʻaki ha lanu ʻoku liliu ʻi he mafana ʻo e ʻea. ʻI he mafana maʻulalo ange, ʻoku ne tuku mai ha maama lanu kulokula mafana. ʻI he fakautuutu ʻa e mafana ʻo e ʻea, ʻoku liliu leva ʻa e lanu ki ha hinehina "mokomoko" pea iku ki ha hinehina lanu pulu. ʻOku fua ʻa e lanu ko ʻeni ʻi he ngaahi ʻiuniti ʻoku ui ko e Kelvin (K). ʻOku maʻulalo ʻaupito ʻa e mafana ʻo e lanu ʻo e ulo ʻo e teʻelango, fakafuofua ki he 1800K (lanu moli mafana). Ko e foʻi ʻuhila angamaheni ʻoku ʻi he 2700K-3000K (hinehina mafana). ʻOku maʻolunga ange ʻa e ʻaho hoʻataa, fakafuofua ki he 5500K-6500K (mokomoko hinehina/puluu). ʻI he mamani ʻo e LEDs, ʻoku ʻikai fekauʻaki hono aʻusia ʻo ha mafana ʻo e lanu pau mo hono fakamafanaʻi ʻo ha filo. Ka ʻoku fekauʻaki ia mo hono fakatahaʻi ʻo e maama mei he ngaahi maʻuʻanga tokoni kehekehe. Ko e founga angamaheni taha ki hono faʻu ʻo e LEDs hinehina ko hono fakaʻaongaʻi ʻo ha LED lanu pulu ʻoku coated ʻaki ha phosphor. ʻOku hanga ʻe he maama lanu puluu ʻo fakaʻaiʻai ʻa e phosphor, ʻa ia ʻoku ne tuku mai leva ʻa e maama lanu engeenga, pea ko hono fakatahaʻi ʻo e maama lanu pulu mo e engeenga ʻoku ne faʻu ʻa e hinehina. Ke liliu ʻa e mafana ʻo e lanu, ʻe lava ke ʻi ai ha ngaahi seti LED lahi: seti ʻe taha ʻaki ha phosphor "mafana" (ʻoku ne maʻu ha maama lanu kulokula-engeenga) mo e seti ʻe taha mo ha phosphor "mokomoko" (ʻoku ne maʻu ha maama lanu pulu ange). ʻI hono liliu tauʻataina ʻa e ngingila ʻo e LED mafana mo mokomoko pea tuifio ʻenau mama, te tau lava ʻo aʻusia ha faʻahinga mafana ʻo e lanu ʻi he vahaʻa ʻo e vahaʻa. Fakalahi ʻa e malohi ki he LED mafana, pea ʻe mafana ange ʻa e mama fakalukufua; fakalahi ʻa e ngaahi LED mokomoko, pea ʻoku mokomoko ange. Ko e tefitoʻi moʻoni mahuʻinga ʻeni ʻi mui ʻi he maama LED ʻoku mafai ke tuʻu ʻi he tuʻunga hinehina pe CCT-adjustable LED.

Ko e ha ʻa e radiator ʻo e sino ʻuliʻuli mo hono fatongia ʻi hono fakaʻuhingaʻi ʻo e mafana ʻo e lanu?

ʻOku mahuʻinga ʻa e fakakaukau ʻo e radiator ʻuliʻuli ki he mahino ʻa e mafana ʻo e lanu. ʻI he fisiki, ko e sino ʻuliʻuli ko ha meʻa fakafakakaukau ia ʻoku ne maʻu ʻa e radiation electromagnetic kotoa pe ʻoku to ki ai, ʻo ʻikai ha meʻa ʻe ʻasi mai ai. ʻI he taimi ʻoku vela ai ʻa e absorber haohaoa ko ʻeni, ʻoku hoko ia ko ha emitter haohaoa ʻo e radiation. Ko e tuʻunga ʻo e maama ʻoku ne tuku mai ʻoku hokohoko mo molemole, pea ko hono lanu ʻoku makatuʻunga pe ia ʻi hono mafana ʻo e ʻea. ʻI he 3000K nai, ʻoku ulo ha sino ʻuliʻuli ʻaki ha maama mafana lanu engeenga-hinehina. ʻI he 5000K, ʻoku hinehina hono mama, ʻo tatau mo e laʻaa hoʻataa. ʻI he 6500K mo ʻolunga, ʻoku lanu pulu makehe ʻa e mama. Koeʻuhi ʻoku liliu ʻa e lanu ʻo e sino ʻuliʻuli ʻi ha founga ʻoku lava ke tala ʻaki ʻa e mafana ʻo e ʻea, ʻoku ne ʻomi ha meʻafua haohaoa ki hono fua ʻo e lanu ʻo e ngaahi maʻuʻanga mama. ʻI heʻetau pehe ʻoku ʻi ai ha mafana ʻo e lanu ʻo e foʻi ʻuhila ko e 3000K, ʻoku tau ʻuhinga ki he lanu tatau ʻo e maama mo ha sino ʻuliʻuli kuo fakamafanaʻi ki he 3000 Kelvin. ʻI ha ngaahi taʻu lahi, naʻe meimei fakaʻaongaʻi lelei ʻa e foʻi fakakaukau ko ʻeni ki he maama incandescent mo e halogen, ʻa ia ko e mafana ʻo e ʻea pea ʻoku nau faʻu ha tuʻunga hokohoko ʻoku meimei tatau mo ha sino ʻuliʻuli. Ko ʻenau chromaticity coordinates (ʻa e fakaʻuhingaʻi totonu ʻo honau lanu ʻi ha sati) ʻoku meimei tatau pe ia ʻi he feituʻu ʻo e sino ʻuliʻuli—ʻa e laine ʻi ha fakatata chromaticity ʻoku ne fakatotoloʻi ʻa e lanu ʻo ha sino ʻuliʻuli ʻi he mafana kehekehe.

Ko e ha ʻa e fakafekauʻaki ʻo e mafana ʻo e lanu (CCT) pea ko e ha ʻoku fakaʻaongaʻi ai ia ki he LEDs?

ʻOku toe faingataʻa ange ʻa e tuʻunga ʻi he ngaahi maʻuʻanga maama ʻoku ʻikai ko ha radiators vela, hange ko e maama fluorescent pea mahuʻinga taha, LEDs. ʻ Oku ʻ ikai hangē ko e laʻaá pe ko ha filament incandescent, ko e LED ʻ okú ne faʻu ʻ a e maama fakafou ʻ i he electroluminescence, kae ʻ ikai ko e vela. ʻOku ʻikai ko ha piko molemole mo hokohoko ʻa hono tuʻunga ʻo hange ko ha sino ʻuliʻuli; ʻoku faʻa fakatahaʻi ia ʻo ha tumutumu lanu pulu masila mo ha phosphor lanu engeenga lahi ange. Koeʻuhi ko e meʻa ni, ʻoku ʻikai faʻa to ʻa e chromaticity coordinates ʻo ha LED ʻi he feituʻu ʻo e sino ʻuliʻuli. ʻE anga fefe haʻatau fakamatalaʻi hono lanu? Ko e feituʻu ʻeni ʻoku hoko ai ʻa e Correlated Color Temperature (CCT). Ko e CCT ko e mafana ia ʻo e radiator ʻuliʻuli ʻa ia ʻoku meimei tatau hono lanu mo e maʻuʻanga maama ʻoku fehuʻia. Ko e mahuʻinga ia ʻo e "best fit". ʻI ha fakatata chromaticity, ʻoku ke maʻu ai ʻa e poini ʻi he feituʻu ʻo e sino ʻuliʻuli ʻoku ofi taha ki he chromaticity coordinates ʻo e LED, pea ko e mafana ko ia ko hono CCT. Hange ko ʻeni, ʻe meimei tatau ʻaupito ʻa e lanu ʻo ha LED mo ha CCT ʻo e 3000K mo ha foʻi ʻuhila incandescent 3000K, neongo ʻoku kehe ʻaupito ʻa hono tuʻunga ʻo e foʻi ʻuhila. Ko e ʻuhinga ʻeni ʻoku hoko ai ʻa e CCT ko e meʻafua angamaheni ʻoku fakaʻaongaʻi ki he meimei kotoa ʻo e maama LED hinehina he ʻaho ni. ʻOku ne ʻomi ha fika faingofua mo intuitive ʻoku ne fakaʻata ʻa e kau fakatau mo e kau tisaini ke fakafehoanaki mo fili ʻa e "mafana" pe "mokomoko" ʻo e mama mei he ngaahi kautaha mo e ngaahi tekinolosia kehekehe, neongo ʻoku kehekehe ʻa e faʻunga ʻo e spectral. ʻOku ʻomi ʻe he CCT maʻulalo ange (2700K-3000K) ha ongo mafana mo fakafiemalie, lolotonga ia ʻoku ʻomi ʻe he CCT maʻolunga ange (4000K-6500K) ha ʻatakai maʻa, tokanga mo longomoʻui.

ʻOku anga fefe hono fakatonutonu ʻo e maama ʻo e LED?

ʻOku ngali faingofua hono liliu ʻo e ngingila ʻo ha LED: tamateʻi pe ʻa e ʻuhila, ʻikai ko ia? Neongo ko e tefitoʻi fakakaukau ia, ka ʻoku mahuʻinga ʻa e founga ʻoku fakaʻaongaʻi ki hono tauhi ʻo e tuʻunga lelei mo e lelei ʻo e lanu. Ko e founga angamaheni mo lelei taha ki hono dimmingʻi ʻo e LEDs ʻoku ui ia ko e Pulse Width Modulation, pe PWM. Ko e PWM ko ha founga ia ki hono puleʻi ʻo e ʻavalisi ʻo e malohi ʻoku ʻoatu ki ha LED ʻo ʻikai liliu ʻa e voltage pe tuʻunga lolotonga ʻoku ngaue ai. ʻOku ngaue ia ʻo hange ha meʻa kamosi fakaʻilekitulonika vave ʻaupito. ʻOku fakamoʻui mo tamateʻi ʻe he PWM ʻa e LED ʻi ha tuʻo lahi ʻoku fuʻu maʻolunga ʻo ʻikai lava ʻe he mata ʻo e tangata ʻo fakatokangaʻi ʻa e kemo. ʻOku fakapapauʻi ʻe he ratio ʻo e taimi "fakamoʻui" ki he taimi "mate" ʻa e ngingila. ʻOku ʻiloa ʻa e fika ko ʻeni ko e siakale ʻo e fatongia. ʻOku ʻuhinga ʻa e siakale ʻo e fatongia 100% ʻoku fakamoʻui maʻu pe ʻa e LED, pea ʻoku ʻasi ia ʻi hono maama lahi taha. ʻOku ʻuhinga ʻa e 50% duty cycle ʻoku vaeua ʻa e taimi mo e vaeua ʻo e taimi; ʻOku fakatahaʻi ʻe hotau mata ʻa e ta vave ko ʻeni pea ʻoku nau fakatokangaʻi ʻoku vaeua hono ngingila. ʻOku hanga ʻe he siakale ʻo e ngaue ʻe 10% ʻo ʻai ke ngali nenefu ʻaupito. ʻOku ola lelei ʻaupito ʻa e founga ko ʻeni koeʻuhi ko e taimi ʻoku ulo ai ʻa e LED, ʻoku lele ia ʻi hono malohi lelei taha, pea ʻi he taimi ʻoku mate ai, ʻoku ʻikai ke ne fakaʻaongaʻi ha malohi. ʻOku fuʻu vave ʻaupito ʻa e fakamoʻui/tamateʻi (faʻa tuʻo lauiafe ʻi he sekoni) pea ʻoku ʻikai lava ke fakatokangaʻi, ʻo ne ʻomi ha aʻusia fakapoʻuli lelei ʻi he taimi ʻoku fakahoko totonu ai.

ʻOku ngaue fefe ʻa e PWM Dimming ʻi he tuʻunga ʻo e circuit?

Ko hono faʻu ʻo ha fakaʻilonga PWM ko ha ngaue mahuʻinga ia ʻi he ngaahi meʻa fakaʻilekitulonika, ʻoku faʻa tokangaʻi ʻe ha microcontroller pe ko ha IC fakaʻuli ʻi loto ʻi he maʻuʻanga ʻuhila LED. ʻOku faʻa fakatefito ʻa e uho ʻo ha misini ʻuhila PWM faingofua ʻi ha circuits comparator ʻoku ne fakafehoanaki ʻa e ongo fakaʻilonga ʻe ua: ko ha peau ʻo e kili pe tapatolu tuʻo lahi mo ha voltage ʻoku feliliuaki (ko e tuʻunga ʻo e dimming ʻoku ke fokotuʻu). Ko e output ʻo e comparator ko ha peau tapafa ʻoku "maʻolunga" (fakamoʻui ʻa e LED) ʻi he taimi ʻoku maʻulalo ai ʻa e peau ʻo e nifo kili ʻi he voltage ʻoku puleʻi, pea "maʻulalo" (tamateʻi ʻa e LED) ʻi he taimi ʻoku ʻi ʻolunga ai. ʻOku liliu ʻa e maolahi ʻo e pulses "maʻolunga" ko ʻeni ʻi he voltage ʻoku puleʻi, ko ia ai ʻa e hingoa ko e Pulse Width Modulation. Ko hono ʻaonga ange, ʻi ha fakaʻuli LED, ʻoku fakaʻaongaʻi ʻa e fakaʻilonga PWM ke fakamoʻui mo tamateʻi ʻa e transistor (hange ko ha MOSFET). ʻOku fokotuʻu ʻa e transistor ko ʻeni ʻi he hokohoko mo e afo LED. ʻI he taimi ʻoku maʻolunga ai ʻa e fakaʻilonga PWM, ʻoku tataki ʻe he transistor, pea tafe ʻa e ʻau ʻi he LEDs, ʻo fakamoʻui kinautolu. ʻI he taimi ʻoku siʻisiʻi ai ʻa e fakaʻilonga, ʻoku tuʻusi ʻa e transistor, taʻofi ʻa e lolotonga pea tamateʻi ʻa e LEDs. ʻOku fili fakalelei ʻa e tuʻo lahi ʻo e fetongi ko ʻeni ke ʻi ʻolunga ʻi he feituʻu ʻe lava ke ʻiloʻi ʻe he mata ʻo e tangata, ʻi ʻolunga ʻi he 200 Hz ʻi he lahi taha ʻo e ngaahi polokalama, pea ʻoku faʻa ʻi he kHz ki he maama maʻolunga ke fakapapauʻi ʻoku ʻikai ha kemo ʻoku ʻasi mai. ʻOku liliu pe ʻe he dimming control ʻoku ke fengaueʻaki mo ia—ha knob, slider, pe smart home app—ʻa e siakale ʻo e fatongia ʻo e fakaʻilonga PWM ko ʻeni.

Ko e ha ʻoku saiʻia ange ai ʻa e PWM ʻi he fakasiʻisiʻi ʻo e lolotonga ki he dimming?

Ko e tefitoʻi ʻuhinga ʻoku hoko ai ʻa e PWM ko e founga fakapoʻuli lahi taha ki he LEDs ko e faitatau ʻo e lanu. ʻOku makatuʻunga ʻa e mafana ʻo e lanu (CCT) ʻo ha LED chip ʻi he ʻau ʻoku tafe mai ai. Kapau te ke fakasiʻisiʻi pe ʻa e direct current (DC) ke fakasiʻisiʻi ʻa e LED, ʻe lava ke liliu ʻa e lanu ʻo e mama. Hange ko ʻeni, ʻe lava ke kiʻi lanu pingiki pe lanu mata ʻa e LED hinehina ʻi he maʻulalo ange ʻa e ʻau. ʻOku ʻikai tali ʻeni ʻi he lahi taha ʻo e ngaahi polokalama ʻo e mama, tautautefito ki he feituʻu ʻoku fie maʻu ai ʻa e lanu hinehina pe lanu maʻolunga. ʻI hono fakaʻaongaʻi ʻo e PWM, ʻoku fakalele maʻu pe ʻa e LED ʻi hono palani lolotonga ʻi he taimi ʻoku fakamoʻui ai. ʻOku fakapapauʻi ʻe he meʻa ni ʻoku tuʻu maʻu mo moʻoni ʻa e lanu ʻo e mama ʻi he kotoa ʻo e dimming range. Tatau ai pe pe ʻoku 100% ngingila pe 10% ngingila ʻa e mama, ʻoku ʻi he kakato mo tonu ʻa e pulses "on", ko ia ʻoku ʻikai liliu ʻa e mafana ʻo e lanu. Ko e loloa pe ʻo e pulses ʻoku liliu. ʻOku ʻai ʻe he meʻa ni ʻa e PWM ko e founga lelei taha ia ki hono tauhi ʻo e mapuleʻi totonu ʻo e lanu. Ko e lelei ʻe taha ko e lavameʻa. ʻE lava ke faʻa iku ʻa e fakasiʻisiʻi ʻo e lolotonga ki he mole ʻa e ivi ʻi he circuit ʻo e fakaʻuli. ʻOku fakasiʻisiʻi ʻe he PWM, ʻi hono fakamoʻui mo tamateʻi kakato ʻa e LEDs, ʻa e ngaahi mole ko ʻeni pea tauhi ke maʻolunga ʻa e lavameʻa fakalukufua ʻo e polokalama, ʻa ia ko ha tefitoʻi talaʻofa ia ʻo e tekinolosia LED.

Ko hono fakatahaʻi ʻo e mafana ʻo e lanu mo e liliu ʻo e ngingila

ʻOku ʻiloʻi ʻa e malohi moʻoni ʻo e maama LED fakaonoponi ʻi he taimi ʻoku tau fakatahaʻi ai ʻa e adjustable CCT mo e PWM dimming. Ko e meʻa ʻeni ʻoku ne fakaʻata ʻa e ngaahi polokalama "tunable white" pe "human-centric lighting". ʻOku ʻi ai ha ongo afo tauʻataina ʻe ua ʻo e LEDs: ko e taha ʻoku ʻi ai ha CCT mafana (e.g., 2700K) pea ko e taha mo ha CCT mokomoko (e.g., 6500K). ʻOku ʻi ai foki mo ha ongo fakaʻuli PWM tauʻataina ʻe ua. ʻOku puleʻi ʻe he fakaʻuli ʻe taha ʻa e ngingila ʻo e LED mafana, pea puleʻi ʻe he fakaʻuli ʻe taha ʻa e ngingila ʻo e LED mokomoko. ʻOku ʻoatu ʻe he central control system—ʻa ia ʻe lava ke hoko ko ha kiʻi meʻa fakaʻofoʻofa ʻe ua pe ko ha polokalama fakaʻotometiki ʻo e fale—ha ongo fakaʻilonga PWM kehekehe. ʻI hoʻo liliu ʻa e siakale ʻo e fatongia ʻo e ongo fakaʻilonga ko ʻeni, te ke lava ʻo fokotuʻu tauʻataina ʻa e malohi ʻo e afo lanu takitaha. Ke maʻu ha maama mafana mo siʻisiʻi, te ke lava ʻo ʻave ha fakaʻilonga PWM malohi ki he LED mafana pea vaivai ʻaupito ki he LED mokomoko. Ke maʻu ha maama ngingila, mokomoko mo longomoʻui, te ke fai ʻa e meʻa ʻoku fehangahangai. Ki ha hinehina ʻoku ʻikai kau ki ha tuʻunga ʻi he maama lotoloto, te ke potupotutatau ʻa e ongo fakaʻilonga. ʻOku fakaʻata ʻe he founga ko ʻeni ʻa e seamless, hokohoko atu ʻa e liliu ʻi he kotoa ʻo e CCT mo e ngingila ʻo e tuʻunga ʻo e mama, ʻo faʻu ha ngaahi ʻatakai ʻo e maama longomoʻui ʻe lava ke faʻifaʻitaki ki he fakalakalaka fakanatula ʻo e maama ʻo e ʻaho mei he mafoa ʻa e ata ki he poʻuli, poupouʻi ʻa e ngaahi taimi circadian ʻo e tangata mo fakaleleiʻi ʻa e fiemalie, lavameʻa, mo e tuʻunga lelei.

Ngaahi Fakakaukau Mahuʻinga ʻi he LED Color and Brightness Control

ʻOku fakamatalaʻi fakanounou ʻe he tepile ko ʻeni ʻa e ngaahi tefitoʻi moʻoni mahuʻinga ʻoku aleaʻi ʻi he fakahinohino ko ʻeni.

Ko hono fakaʻosi, ko e malava ko ia ke liliu fakatouʻosi ʻa e mafana ʻo e lanu mo e ngingila ʻo e maama LED ko ha fengaueʻaki faingataʻa ia ʻo e palani fakaʻata mo e puleʻi fakaʻilekitulonika. ʻOku fakaʻata kitautolu ʻe he tefitoʻi moʻoni ʻo hono tuifio ʻo e ngaahi maʻuʻanga maama mafana mo mokomoko ke tau ʻalu ʻi he CCT spectrum, lolotonga ia ʻoku ʻomi ʻe he tonu ʻo e PWM dimming ʻa e malohi ʻo e lanu ʻoku ʻikai ke tau mapuleʻi. ʻOku hanga ʻe he ngaahi tekinolosia ko ʻeni ʻo fakaivia kitautolu ke tau faʻu ha ngaahi ʻatakai ʻo e maama ʻoku ʻikai ngata pe ʻi he ivi lelei ka ʻoku ne tali lelei ʻetau ngaahi fie maʻu, ʻo fakaleleiʻi ai ʻetau fiemalie, ngaue, mo e fehokotaki mo e mamani fakanatula.

Ngaahi Fehuʻi ʻOku Faʻa ʻEke Fekauʻaki mo e Lanu mo e Maama ʻo e LED

Te u lava ʻo fakasiʻisiʻi ha foʻi ʻuhila LED?

ʻIkai, ʻoku ʻikai ke dimmable ʻa e ngaahi foʻi ʻuhila LED kotoa pe. Kuo pau ke ke fakatau pau ʻa e ngaahi foʻi ʻuhila ʻoku fakahingoa ko e "dimmable." ʻE lava ke fakatupu ʻe hono fakaʻaongaʻi ʻo ha foʻi ʻuhila LED ʻoku ʻikai ke lava ʻo fakaʻaongaʻi ʻi ha circuit dimmer ʻo fakatupu ʻa e kemo, ngungu, pea ʻe iku ʻo maumauʻi ʻa e foʻi ʻuhila pe ko e dimmer. ʻIkai ngata ai, ʻoku faʻa ngaue lelei taha ʻa e dimmable LEDs mo e ngaahi meʻa kamosi LED dimmer ʻoku fenapasi mo ia, he ʻoku ʻikai ngaue lelei ʻa e ngaahi dimmer motuʻa ange naʻe faʻu ki he ngaahi foʻi ʻuhila incandescent.

Ko e ha ʻa e mafana ʻo e lanu lelei taha ki ha loki mohe?

Ki ha loki mohe, ʻoku faʻa fokotuʻu atu ha mafana ʻo e lanu ke fakaʻaiʻai ʻa e malolo mo teuteuʻi ʻa e sino ki he mohe. Kumi ʻa e LEDs ʻoku ʻi ai ʻa e CCT ʻo e 2700K ki he 3000K. ʻOku faʻifaʻitaki ʻe he maama mafana mo engeenga ko ʻeni ʻa e ulo ʻo ha afi pe ngaahi foʻi ʻuhila tukufakaholo pea tokoni ke faʻu ha ʻatakai fakafiemalie mo nonga. ʻOku fakaʻaongaʻi ʻe he ngaahi polokalama maʻolunga ʻe niʻihi ʻa e maama hinehina ke liliu mei he maama mokomoko mo longomoʻui ʻi he pongipongi ki he maama mafana ʻi he poʻuli.

ʻOku kovi nai ʻa e fakapoʻuli ʻo e PWM ki ho mata?

ʻOku ʻikai fakatokangaʻi ʻe he mata ʻo e tangata ʻa e tuʻunga maʻolunga ʻo e PWM, ʻoku ngaue ʻi he tuʻunga lahi ʻi ʻolunga ʻi he 1-2 kHz. Neongo ia, ʻe lava ke fakatupu ʻe he PWM maʻulalo (ʻi lalo ʻi he 200 Hz) ʻa e kemo ʻoku ʻasi mai, ʻa ia ʻe lava ke iku ki he ongosia ʻa e mata, langa ʻulu mo e taʻefiemalie ki ha niʻihi fakafoʻituitui. ʻI he taimi ʻoku fili ai ʻa e dimmable LEDs, fili ʻa e ngaahi kautaha falalaʻanga ʻoku nau fakamahinoʻi ʻa e "flicker-free" ke fakapapauʻi ʻoku maʻolunga ʻa e tuʻo lahi ʻo e PWM mo ha aʻusia fakafiemalie ki he sio.