Ukwehluleka okuthathu okuvamile kwezibani zesignali ze-LED nezixazululo

Abanye abangani babuza izizathu ezivamile kanye nezindlela zokwelapha izibani zesignali ze-LED ezikhanya, kanti abanye abantu bafuna ukubuza isizathu sokuthi kungani izibani zesignali ze-LED zingakhanyi. Kwenzekani? Eqinisweni, kunezinkinga ezintathu ezivamile kanye nezixazululo zezibani zesignali.

Ukwehluleka okuthathu okuvamile kwezibani zesignali ze-LED nezixazululo:

Iphutha elivamile ukwehluleka kwe-rectifier. Iya ku-light City bese uyithenga bese uyishintsha. I-led yonke ayivamile ukulimala.

Izizathu ezimbili: Izizathu zokukhanyisa isibani sesignali ye-LED:

1. Ubuhlalu besibani namandla okushayela i-LED awafani, ubuhlalu besibani obujwayelekile obungu-1W bunomthamo wamanje ongu-:280-300 ma kanye ne-voltage engu-:3.0-3.4V, uma i-chip yesibani ingenawo amandla anele, kuzobangela isenzakalo sokuguguleka komthombo wokukhanya, uma ugesi umkhulu kakhulu, ubuhlalu besibani ngeke bukwazi ukumelana nokushintsha. Ezimweni ezimbi kakhulu, izintambo zegolide noma zethusi ngaphakathi kobuhlalu zingasha, okubangela ukuthi ubuhlalu bungasebenzi.

2. Ugesi we-drive ungase wonakale, uma nje uwushintsha ngogesi we-drive omuhle, ngeke uphazima.

3. Uma umshayeli enomsebenzi wokuvikela ukushisa ngokweqile, ukusebenza kokushabalalisa ukushisa kwesibani sesignali se-LED akukwazi ukuhlangabezana nezidingo, futhi ukuvikelwa kokushisa ngokweqile komshayeli kuzokhanya lapho kuqala ukusebenza. Isibonelo, indlu yesibani esibonakalayo esingu-20 w esetshenziselwa ukuhlanganisa izibani ezingu-30W ayenzi umsebenzi omuhle wokupholisa.

4. Uma izibani zangaphandle nazo zinezimpawu ze-stroboscopic, kusho ukuthi izibani zigcwele amanzi. Ngenxa yalokho, uma zikhanya, azikhanyi. I-beacon kanye nomshayeli kuphukile. Uma umshayeli enza umsebenzi omuhle wokuvimbela amanzi, i-bead yesibani iphukile futhi umthombo wokukhanya ungashintshwa.

Okwesithathu. Indlela yokucubungula ukukhanya kwesignali ye-LED:

1. Ezinhlelweni zokukhanyisa ze-LED ezisebenzisa amandla aphansi ngaphandle komugqa, i-topology yamandla evamile yi-topology ye-flyback ehlukanisiwe. I-Green Dot, umshayeli we-LED osebenzisa amandla aphansi angu-8W, ihlangabezana nezindinganiso zokukhanyisa ze-energy Star solid-state. Esimweni sokuklama, ngoba ukuguqulwa kwamandla we-sinusoidal square wave wesilawuli se-flyback akunikezi amandla aqhubekayo e-primary bias, i-dynamic self-power circuit ingase isebenze futhi ibangele ukukhanya okukhanyayo. Ukuze ugweme le nkinga, kubalulekile ukwenza ukukhishwa kwe-off-set okuyinhloko kumjikelezo ngamunye wesigamu. Ngakho-ke, kubalulekile ukukhetha kahle amandla kanye namanani okumelana kwezibani zesignali ze-LED ezakha isifunda.

2. Ngokuvamile iso lomuntu lingabona ukukhanya okukhanyayo ngemvamisa engu-70 Hz, kodwa ngaphezu kwalokho alikwazi. Ngakho-ke, ekusetshenzisweni kokukhanyisa kwe-LED, uma isignali ye-pulse inengxenye yemvamisa ephansi enemvamisa engaphansi kuka-70 Hz, iso lomuntu lizozizwa likhanya. Yiqiniso, kunezici eziningi ezingabangela ukuthi izibani ze-LED zikhanye kuhlelo oluthile.

3. Izihlungi ze-Emi ziyadingeka ngisho nasezinhlelweni zokusebenza ze-LED drive ezihlinzeka ngokulungiswa okuhle kwamandla kanye nokusekela ukufiphala kwamaswishi e-SCR angama-terminal amabili aqondiswe ku-three-terminal. Ugesi odlulayo obangelwa yisinyathelo seswishi se-SCR esingama-triple terminal uvusa ukuzwakala kwemvelo kwama-inductor nama-capacitor kusihlungi se-emi.

Uma isici sokuqaqamba sibangela ukuthi ugesi wokufaka ube ngaphansi kunogesi wokubamba we-SCR switch element enama-terminal amathathu, i-SCR switch element enama-terminal amabili izocinywa. Ngemva kokulibaziseka okufushane, i-SCR switching element enama-terminal amathathu izovulwa futhi ukuze ivuse ugesi ofanayo. Lolu chungechunge lwezehlakalo lungaphindwa izikhathi eziningi ngaphakathi komjikelezo wesigamu we-INPUT power waveform ye-LED semaphore, okuholela ekukhanyeni kwe-LED okubonakalayo.