I-LED isetshenziswa kabanzi ezindaweni zokukhanyisa. Ngaphezu kwezinzuzo zayo eziyingqayizivele ngaphezu kwezindlela zokukhanyisa zendabuko, ngaphezu kokuthuthukisa izinga lokuphila, ukuthuthukisa ukusebenza kahle kwemithombo yokukhanya nokwandisa impilo yesevisi yezinto ezikhanyayo, i-LED isebenzisa umsebenzi wayo oyingqayizivele wokufiphaza ukushintsha izinga lokushisa lombala nokukhanya kokukhanya. , futhi ifinyelela ngokugcwele inzuzo enkulu kakhulu yezinhlelo zokusebenza zokonga amandla.

Ukusebenza kahle kokufiphala kweUkukhanyisa kwe-LEDukulungiswa kuncike kumthombo wokukhanya we-LED ofanisiwe kanye nokunikezwa kwamandla okushayela.

Ngenjwayelo,Imithombo yokukhanya ye-LEDingahlukaniswa ngezigaba ezimbili: umthombo wokukhanya we-LED diode eyodwa noma umthombo wokukhanya we-diode we-LED onokumelana. Ekusetshenzisweni, ngezinye izikhathi imithombo yokukhanya ye-LED iklanywe njengemojula equkethe isiguquli se-DC-DC, futhi amamojula ayinkimbinkimbi anjalo awaxoxwanga kulesi sihloko. Uma umthombo wokukhanya we-LED noma imojula iyi-diode ye-LED ehlukile ngokwayo, indlela evamile yokufiphalisa ukulungisa i-amplitude yokokufaka kwe-LED yamanje, ngakho ukukhethwa kwamandla edrayivu ye-LED kufanele kubhekisele kulesi sici.

Izimo ezijwayelekile zokufiphalisa ze-LED ezimbi:

Uma umshayeli wamandla we-LED ophumayo oshintshwayo wamanje esetshenziselwa ukufiphalisa izibani ze-LED, i-deadtravel iyinkinga evamile. Nakuba i-Umshayeli we-LEDamandla kagesi angasebenza kahle uma egcwele, kusobala ukuthi i-dimming ayisheleli uma umshayeli we-LED engalayishiwe ngokugcwele.

Isixazululo Sokushintshwa Kobubanzi Bokuphuma Kwe-Pulse (Okukhiphayo PWM)

Uma amandla omshayeli we-LED esetshenziselwa ukufiphala kwebha yokukhanya ye-LED ngaphansi komthwalo ogcwele, ayikho inkinga ye-deadtravel. Impikiswano engenhla iyiqiniso, kodwa ayisebenzi kakhulu. Eqinisweni, imichilo yokukhanya ye-LED ivame ukusetshenziswa ezinhlelweni ezihlukahlukene (ukukhanyisa okuhlobisa / ukukhanyisa okuwusizo / ukukhanyisa ukukhangisa) lapho ubude bungenakulinganiswa ngokunembile. Ngakho-ke, isixazululo esilula nesingcono kakhulu sohlelo lokusebenza ukukhetha kahle amandla omshayeli we-LED anomsebenzi wokufiphalisa ophumayo we-PWM ukuze kuzuzwe izidingo zokufiphalisa zamapheshana okukhanya kwe-LED. Ukukhanya okukhiphayo kunganciphisa ushintsho lokufiphala kokukhanya ngenxa yomjikelezo womthwalo wesiginali yokufiphala. Imingcele ebalulekile yokukhetha ukunikezwa kwamandla edrayivu ukulungiswa kokufiphala kanye nemvamisa yokuphuma kwe-pulse wide modulation PWM. Umthamo omncane wokufiphalisa kufanele ube phansi njengo-0.1% ukuze ufinyelele ukulungiswa kokufiphalisa okungu-8bit ukuze uhlangabezane nazo zonke izinhlelo zokusebenza zokufiphalisa ibha yokukhanya ye-LED. Imvamisa ye-PWM yobubanzi be-pulse modulation kufanele ibe phezulu ngangokunokwenzeka, Ukuvimbela inkinga yokucwayiza kokukhanya okukhulunywe kuThebula (I), ngokuya ngezincwadi zocwaningo lobuchwepheshe ezifanele, imvamisa iyanconywa ukuthi okungenani ibe ngaphezulu kuka-1.25 kHz ukuze kuncishiswe ukucwayiza kwezipoki okubonakala emehlweni abantu.