Tsib lub ntsiab dimming txoj kev ntawm LED teeb

1. 1-10V dimming: Muaj ob lub voj voog ywj pheej hauv 1-10V dimming ntaus ntawv. Ib qho yog ib qho hluav taws xob hluav taws xob zoo tib yam, siv los qhib lossis tawm lub zog rau cov khoom siv teeb pom kev zoo, thiab lwm qhov yog qhov hluav taws xob tsis tshua muaj hluav taws xob, uas muab kev siv hluav taws xob, qhia cov khoom siv teeb pom kev zoo dimming. 0-10V dimming controller feem ntau yog siv rau dimming tswj ntawm fluorescent teeb. Tam sim no, vim hais tias ib lub zog tas li ntxiv rau LED tsav tsheb module thiab muaj kev tswj xyuas tshwj xeeb, yog li 0 -10V dimmer kuj tuaj yeem txhawb nqa ntau lub teeb pom kev zoo. Txawm li cas los xij, daim ntawv thov shortcomings kuj pom tseeb heev. Tsawg-voltage tswj cov teeb liab yuav tsum muaj cov kab txuas ntxiv, uas ua rau kom muaj kev tsim kho zoo heev.

2. DMX512 dimming: DMX512 raws tu qauv yog thawj zaug tsim los ntawm USITT (United States Institute of Theatre Technology) rau hauv tus qauv digital interface los ntawm lub console los tswj lub dimmer. DMX512 transcends analog systems, tab sis tsis tuaj yeem hloov pauv cov tshuab analog. DMX512 qhov yooj yim, kev ntseeg tau (yog tias tau teeb tsa thiab siv kom raug), thiab qhov yooj yim ua rau nws txoj kev xaiv yog tias nyiaj tso cai. Hauv kev siv tswv yim, txoj kev tswj hwm ntawm DMX512 feem ntau yog tsim cov khoom siv hluav taws xob thiab cov khoom siv ua ke. Lub DMX512 maub los tswj 8 mus rau 24 kab thiab ncaj qha tsav RBG kab ntawm LED teeb. Txawm li cas los xij, hauv cov phiaj xwm teeb pom kev zoo, vim qhov tsis muaj zog ntawm DC kab, nws yuav tsum tau nruab ib lub maub los txog li 12 meters, thiab lub tsheb npav tswj tau nyob rau hauv tib hom. , yog li ntawd, tus maub los muaj ntau txoj hlua, thiab nyob rau hauv ntau rooj plaub nws tseem tsis tuaj yeem tsim.

3. Triac dimming: Triac dimming tau siv nyob rau hauv cov teeb pom kev zoo thiab lub teeb txuag hluav taws xob tau ntev. Nws tseem yog txoj kev dav dav siv dimming rau LED dimming. SCR dimming yog ib yam ntawm lub cev dimming. Pib los ntawm AC theem 0, cov input voltage chops rau hauv nthwv dej tshiab. Tsis muaj qhov hluav taws xob nkag mus txog thaum SCR qhib. Lub hauv paus ntsiab lus ua haujlwm yog los tsim kom muaj tangential output voltage waveform tom qab txiav cov input voltage waveform los ntawm lub kaum sab xis conduction. Kev siv lub hauv paus ntsiab lus ntawm tangential tuaj yeem txo qhov txiaj ntsig zoo ntawm qhov tso zis hluav taws xob, yog li txo lub zog ntawm cov khoom siv zoo tib yam (resistive loads). Triac dimmers muaj qhov zoo ntawm kev hloov kho qhov tseeb, kev ua haujlwm siab, me me, lub teeb yuag, thiab yooj yim tswj chaw taws teeb, thiab ua tus thawj coj hauv khw.

4. PWM dimming: Pulse width modulation (PWM-Pulse Width Modulation) thev naus laus zis paub txog kev tswj cov analog circuits los ntawm on-off tswj ntawm inverter Circuit Court hloov. Cov zis waveform ntawm pulse width modulation technology yog ib tug series ntawm pulses ntawm sib npaug zos loj uas yog siv los hloov lub xav waveform.

Siv cov sine yoj ua piv txwv, uas yog, ua qhov sib npaug ntawm qhov sib npaug ntawm cov pulses sine yoj, thiab ua rau cov zis pulses du li sai tau thiab nrog tsawg-txoj kev sib haum xeeb. Raws li kev xav tau sib txawv, qhov dav ntawm txhua tus mem tes tuaj yeem hloov kho raws li kev hloov pauv qhov tso zis hluav taws xob lossis qhov tso zis zaus, yog li tswj cov analog circuit. Yooj yim muab, PWM yog ib txoj hauv kev digitally encoding analog teeb liab theem.

Los ntawm kev siv cov txee siab daws teeb meem, tus neeg nyob qhov sib piv ntawm cov square nthwv dej yog modulated los encode qib ntawm cov teeb liab tshwj xeeb analog. Lub teeb liab PWM tseem yog digital vim hais tias nyob rau lub sijhawm twg los xij, lub zog DC tag nrho yog tam sim no lossis tsis muaj kiag li. Ib qhov hluav taws xob lossis qhov tam sim no yog siv rau lub simulated load nyob rau hauv ib qho kev rov ua kom rov ua haujlwm ntawm cov pulses los yog tawm. Thaum lub hwj chim qhib, nws yog thaum lub DC fais fab mov ntxiv rau lub load, thiab thaum nws tawm, nws yog thaum lub hwj huam mov yog disconnected.

Yog hais tias qhov zaus ntawm lub teeb thiab qhov tsaus ntuj tshaj 100Hz, qhov uas tib neeg lub qhov muag pom yog qhov nruab nrab qhov ci, tsis yog LED flashing. PWM kho qhov ci ntsa iab los ntawm kev kho qhov feem ntawm lub sijhawm ci thiab tsaus. Nyob rau hauv lub voj voog PWM, vim tias qhov ci ntsa iab pom los ntawm tib neeg lub qhov muag rau lub teeb flickers ntau dua 100Hz yog cov txheej txheem sib sau, uas yog, lub sijhawm ci ntsa iab rau ntau dua ntawm tag nrho lub voj voog. Qhov loj dua, qhov ci ntsa iab rau tib neeg lub qhov muag.

5. DALI dimming: Tus qauv DALI tau txhais lub DALI network, suav nrog ntau tshaj 64 units (tuaj yeem hais tawm ntawm nws tus kheej), 16 pawg thiab 16 scenes. Cov teeb pom kev sib txawv ntawm lub tsheb npav DALI tuaj yeem ua tau yooj yim pab pawg kom ua tiav qhov sib txawv tswj thiab tswj. Hauv kev siv cov tswv yim, tus tswj hwm DALI ib txwm tswj tau txog li 40 txog 50 lub teeb, uas tuaj yeem muab faib ua 16 pawg, thiab tuaj yeem ua qee yam ua ke. Hauv DALI network, 30 txog 40 cov lus qhia tswj tau ua tiav ib ob. Qhov no txhais tau hais tias tus maub los yuav tsum tswj 2 dimming cov lus qhia ib ob rau txhua pawg teeb pom kev zoo.