I-LED isetyenziswa ngakumbi nangakumbi kwizibane zokukhanyisa. Ukongeza kwiinzuzo zayo ezizodwa kwiindlela zokukhanyisa zendabuko, ukongeza ekuphuculeni umgangatho wobomi, ukuphucula ukusebenza kakuhle kwemithombo yokukhanya kunye nokwandisa ubomi benkonzo yezixhobo zokukhanyisa, i-LED isebenzisa umsebenzi wayo okhethekileyo wokunciphisa ukukhanya ukutshintsha ubushushu bombala kunye nokukhanya kokukhanya. , kwaye ifezekisa ngokupheleleyo inzuzo enkulu yezicelo zokugcina amandla.

Ukusebenza kokuncipha kweUkukhanya kwe-LEDUkulungiswa kuxhomekeke kumthombo wokukhanya ohambelanayo we-LED kunye nonikezelo lwamandla okuqhuba.

Nje,Imithombo yokukhanya ye-LEDinokwahlulwa ibe ngamacandelo amabini: i-LED enye yomthombo wokukhanya we-diode okanye umthombo wokukhanya we-LED we-diode kunye nokumelana. Kwisicelo, ngamanye amaxesha imithombo yokukhanya ye-LED yenzelwe njengemodyuli equkethe i-DC-DC converter, kwaye iimodyuli ezinjalo ezinzima azixoxwa kweli nqaku. Ukuba umthombo wokukhanya we-LED okanye imodyuli yi-diode eyahlukileyo ye-LED ngokwayo, indlela eqhelekileyo yokunciphisa ukukhanya kukulungelelanisa i-amplitude yegalelo le-LED yangoku, ngoko ke ukhetho lwamandla okuqhuba i-LED kufuneka lubhekiselele kule nkalo.

Iimeko eziqhelekileyo zobumnyama bokukhanya kwe-LED:

Xa umqhubi wamandla we-LED enemveliso eguquguqukayo yangoku isetyenziselwa ukukhanya kwe-LED izibane, i-deadtravel yingxaki eqhelekileyo. Nangona iUmqhubi we-LEDunikezelo lwamandla lunokusebenza kakuhle xa lugcwele umthwalo, kuyacaca ukuba ukufiphala akuhambanga kakuhle xa umqhubi we-LED engekho kumthwalo opheleleyo.

Isisombululo sokuModareyitha kweSiphumo sePulse Width (Imveliso yePWM)

Ukuba amandla omqhubi we-LED asetyenziselwa ukukhanya kwe-LED bar dimming phantsi komthwalo ogcweleyo, akukho ngxaki ye-deadtravel. Le ngxoxo ingasentla iyinyani, kodwa ayisebenzi kangako. Enyanisweni, izibane ze-LED zihlala zisetyenziswa kwizicelo ezahlukeneyo (ukukhanyisa ukuhlobisa / ukukhanya okuncedisayo / ukukhanyisa ukukhangisa) apho ubude abunakuqikelelwa ngokuchanekileyo. Ke ngoko, esona sisombululo silula kwaye sisona sisona sisisombululo kukukhetha ngokuchanekileyo amandla omqhubi we-LED kunye nobubanzi be-pulse ububanzi be-PWM dimming ukufezekisa iimfuno zobumnyama bemigca yokukhanya ye-LED. Ukukhanya okuphumayo kunokunciphisa utshintsho oluluzizi lokuqaqamba ngenxa yomjikelezo womthwalo wesiginali yobumnyama. Iiparamitha ezibalulekileyo zokukhetha unikezelo lwamandla e-drive sisisombululo sokufiphala kunye nokuphindaphinda kwemveliso ye-pulse wide modulation PWM. Ubuncinane bomthamo wokukhanya kufuneka bube ngaphantsi njenge-0.1% ukufikelela kwisisombululo sobumnyama se-8bit ukuhlangabezana nazo zonke izicelo zokukhanya kwebar yokukhanya kwe-LED. Isiphumo sokumodareyitha kobubanzi be-PWM kufuneka sibe phezulu kangangoko kunokwenzeka, Ukuthintela ingxaki yokukhanya ekhankanyiweyo kwiThebhile (I), ngokuhambelana noncwadi olufanelekileyo lophando lobuchwephesha, i-frequency inconywa ukuba ibe ngaphezulu kwe-1.25 kHz ukunciphisa ukuqhwanyaza kweziporho ezibonakalayo emehlweni abantu.