Iindlela ezintlanu eziphambili zokukhanya kwezibane ze-LED

1. 1-10V dimming: Kukho iisekethe ezimbini ezizimeleyo kwisixhobo sobumnyama se-1-10V. Enye yisekethe yombane eqhelekileyo, esetyenziselwa ukukhanyisa okanye ukucima umbane kwisixhobo sokukhanyisa, kwaye enye yisekethe ye-voltage ephantsi, ebonelela ngeVoltage yereferensi, ixelela isixhobo sokukhanyisa inqanaba lokuncipha. I-0-10V isilawuli sobumnyama sasiqhele ukusetyenziswa ukulawula ubumnyama kwizibane ze-fluorescent. Ngoku, ngenxa yokuba umbane oqhubekayo wongezwa kwimodyuli yomqhubi we-LED kwaye kukho isiphaluka sokulawula esinikezelweyo, ngoko ke i-0 -10V dimmer inokuxhasa inani elikhulu lokukhanyisa kwe-LED. Nangona kunjalo, iintsilelo zesicelo nazo zicacile kakhulu. Iimpawu zokulawula i-low-voltage zifuna isethi eyongezelelweyo yemigca, eyandisa kakhulu iimfuno zokwakha.

2. DMX512 dimming: Iprotocol ye-DMX512 yaphuhliswa kuqala yi-USITT (i-United States Institute of Theatre Technology) ibe yi-interface eqhelekileyo yedijithali ukusuka kwi-console ukulawula i-dimmer. I-DMX512 idlula iinkqubo ze-analog, kodwa ayinakuthatha indawo ngokupheleleyo yeenkqubo ze-analog. Ukulula kwe-DMX512, ukuthembeka (ukuba ifakwe kwaye isetyenziswe ngokuchanekileyo), kunye nokuguquguquka kwenza kube yiprotocol yokhetho ukuba iimali zivumela. Kwizicelo ezisebenzayo, indlela yokulawula ye-DMX512 ngokuqhelekileyo ukuyila unikezelo lwamandla kunye nomlawuli kunye. Umlawuli we-DMX512 ulawula i-8 kwimigca ye-24 kwaye uqhuba ngokuthe ngqo imigca ye-RBG yezibane ze-LED. Nangona kunjalo, ekwakheni iiprojekthi zokukhanyisa, ngenxa yobuthathaka bemigca ye-DC, kufuneka kufakwe umlawuli malunga neemitha ezili-12, kwaye ibhasi yokulawula ikwimo ehambelanayo. , ngoko ke, umlawuli unocingo oluninzi, kwaye kwiimeko ezininzi akunakwenzeka nokuba kwakhiwe.

3. I-Triac dimming: I-Triac dimming isetyenziswe kwizibane ze-incandescent kunye nezibane zokulondoloza amandla ixesha elide. Ikwayeyona ndlela isetyenziswa kakhulu yokufiphala kwe-LED. Ubumnyama be-SCR luhlobo oluthile lobumnyama bomzimba. Ukuqala kwisigaba 0 se-AC, amandla ombane egalelo anqumle abe ngamaza amatsha. Akukho galelo lombane de i-SCR ivulwe. Umgaqo osebenzayo kukuvelisa i-tangential output voltage waveform emva kokusika igalelo lombane waveform nge-engile yokuqhuba. Ukusebenzisa umgaqo we-tangential kunokunciphisa ixabiso elisebenzayo le-voltage ephumayo, ngaloo ndlela ukunciphisa amandla emithwalo eqhelekileyo (imithwalo echasayo). I-Triac dimmers inezibonelelo zokuchaneka kohlengahlengiso oluphezulu, ukusebenza kakuhle okuphezulu, ubungakanani obuncinci, ubunzima obulula, kunye nolawulo olukude, kunye nokulawula imarike.

4. I-PWM dimming: Ukumodareyitha kobubanzi be-Pulse (PWM-Pulse Width Modulation) iteknoloji iqonda ukulawulwa kweesekethe ze-analog ngolawulo oluvaliweyo lwe-inverter circuit circuit. Imveliso ye-wave wave yetekhnoloji yokumodareyitha ububanzi be-pulse luluhlu lwee-pulses ezinobungakanani obulinganayo ezisetyenziselwa ukubuyisela i-waveform efunwayo.

Ukuthatha i-sine wave njengomzekelo, oko kukuthi, ukwenza i-voltage elinganayo yolu ngcelele lwee-pulses i-sine wave, kunye nokwenza i-pulses yemveliso ibe mpuluswa kangangoko kunokwenzeka kwaye ibe ne-harmonics ephantsi-phantsi. Ngokweemfuno ezahlukeneyo, ububanzi be-pulse nganye bunokulungelelaniswa ngokufanelekileyo ukutshintsha i-voltage ephumayo okanye i-frequency output, ngaloo ndlela ilawula isiphaluka se-analog. Ukubeka ngokulula, i-PWM yindlela yokufaka idijithali amanqanaba ophawu lwe-analog.

Ngokusetyenziswa kwezinto zokubala eziphezulu, umlinganiselo wokuhlala we-square wave ulungelelaniswa ukuze udibanise umgangatho wesignali ethile ye-analog. Uphawu lwe-PWM lusesedijithali kuba nangawuphi na umzuzu, amandla e-DC apheleleyo akhoyo okanye akakho ngokupheleleyo. I-voltage okanye umthombo wangoku usetyenziswa kumthwalo owenziweyo ngokulandelelana okuphindaphindiweyo kwee-pulses ezivuliwe okanye ezivaliweyo. Xa umbane uvuliwe, kuxa umbane we-DC wongezwa kumthwalo, kwaye xa ucinyiwe, kuxa unikezelo lwamandla lunqanyulwa.

Ukuba ubuninzi bokukhanya nobumnyama bungaphezulu kwe-100Hz, into ebonwa liliso lomntu kukukhanya okuphakathi, hayi ukudanyaza kwe-LED. I-PWM ilungisa ukukhanya ngokulungelelanisa umlinganiselo wexesha eliqaqambileyo nelimnyama. Kumjikelo we-PWM, ngenxa yokuba ukuqaqamba okubonwa liliso lomntu ngenxa yokukhanya okukhanyayo okungaphezulu kwe-100Hz yinkqubo eyongezelekayo, oko kukuthi, ixesha eliqaqambileyo libalela umlinganiselo omkhulu womjikelo wonke. Okukhona isikhulu, kokukhona ivakala ngakumbi kwiliso lomntu.

5. Ubumnyama be-DALI: Umgangatho we-DALI uchaze uthungelwano lwe-DALI, kubandakanywa ubuninzi beeyunithi ezingama-64 (zinokulungiswa ngokuzimeleyo), amaqela ali-16 kunye nemiboniso ye-16. Iiyunithi zokukhanyisa ezahlukeneyo kwibhasi ye-DALI zinokudityaniswa ngokuguquguqukayo ukufezekisa ulawulo lwendawo eyahlukileyo kunye nolawulo. Kwizicelo ezisebenzayo, isilawuli esiqhelekileyo se-DALI silawula ukuya kuthi ga kwizibane ezingama-40 ukuya kwezingama-50, ezinokuthi zohlulwe zibe ngamaqela angama-16, kwaye zinokuqhuba ezinye izenzo ezifanayo. Kwinethiwekhi ye-DALI, i-30 ukuya kwi-40 imiyalelo yokulawula inokucutshungulwa ngomzuzwana. Oku kuthetha ukuba umlawuli kufuneka alawule imiyalelo ye-2 dimming ngomzuzwana kwiqela ngalinye lokukhanyisa.