isebenza kanjani i-dimable led driver?

Umshayeli ongacimeki idivayisi esetshenziselwa ukushintsha ukukhanya noma ukuqina kwezibani zokukhanyisa ezikhipha ukukhanya (LED). Ilungisa amandla kagesi anikezwe ama-LED, okuvumela amakhasimende ukuthi enze ngokwezifiso ukukhanya kokukhanya ngendlela athanda ngayo. Izishayeli ezicimayo zivame ukusetshenziselwa ukukhiqiza amandla okukhanya ahlukahlukene kanye nemizwa ezindlini, emahhovisi, nokunye okungaphakathi nasendlini.ukukhanya kwangaphandleizicelo.

Izishayeli ze-LED ezicimayo zivame ukusebenzisa i-Pulse Width Modulation (PWM) noma i-Analog Dimming. Nasi isifinyezo esisheshayo sokuthi indlela ngayinye isebenza kanjani:

I-PWM: Kule nqubo, umshayeli we-LED ushintsha ngokushesha i-LED yamanje ivule futhi ivale ngefrikhwensi ephezulu kakhulu. I-microprocessor noma i-digital circuitry ilawula ukushintsha. Ukuze kutholwe ileveli yokukhanya efanele, umjikelezo wemisebenzi, obonisa ingxenye yesikhathi lapho i-LED ikhanya iqhathaniswa nokucima, iyashintshwa. Umjikelezo womsebenzi ophezulu ukhiqiza ukukhanya okwengeziwe, kuyilapho umjikelezo womsebenzi ophansi wehlisa ukukhanya. Imvamisa yokushintsha iyashesha kangangokuthi iso lomuntu libona ukuphuma kokukhanya okuqhubekayo naphezu kwe-LED ehlala ivuliwe futhi ivaliwe.

Le ndlela, evame ukusetshenziswa ezinhlelweni zokufiphalisa idijithali, inikeza ukulawula okuqondile kokuphuma kokukhanya.

I-Analog Dimming: Ukushintsha ukukhanya, inani lamanje eligeleza kuma-LED liyalungiswa. Lokhu kufezwa ngokulungisa i-voltage esetshenziswa kumshayeli noma ngokulawula yamanje nge-potentiometer. Ukufiphalisa kwe-analogi kukhiqiza umphumela wokufiphala okushelelayo kodwa kunobubanzi obuphansi bokufiphala kune-PWM. Kuvamisile kumasistimu amadala wokufiphalisa kanye ne-retrofits lapho ukuhambisana kokufiphalisa kuyinkinga.

Zombili izindlela zingalawulwa yizinhlobonhlobo zezinqubo zokufiphaza, ezihlanganisa i-0-10V, i-DALI, i-DMX, nezinketho ezingenantambo njenge-Zigbee noma i-Wi-Fi. Lawa maphrothokholi asebenzisana nomshayeli ukuze athumele isignali yokulawula elungisa ukushuba kokufiphala ephendula okokufaka komsebenzisi.

Kubalulekile ukukhumbula ukuthi izishayeli ze-LED ezicimayo kufanele zihambisane nesistimu yokufiphalisa esetshenziswayo, futhi ukuhambisana komshayeli ne-dimmer kufanele kuqinisekiswe ukuze kusebenze kahle.

Xhumana nathifuthi singabelana ngolwazi olwengeziwe mayelana nezibani ze-strip ze-LED.