Izikrini zokubonisa i-LED zixhaphake kakhulu ebomini kwaye zizisa ubuninzi bezinto eziluncedo kubomi bethu.Ekubeni ukukhanya kwesikrini se-LED akunakutshintshwa kunye nokukhanya kwe-ambient, kukho ingxaki yomboniso ongacacanga ngexesha lasemini okanye ukukhazimula ebusuku ngenxa yokukhanya kakhulu.Ukuba ukukhanya kunokulawulwa, kungekhona nje amandla angagcinwa, kodwa kunye nomphumela wokubonisa isikrini unokwenziwa kucace ngakumbi.
I-01led ngumthombo wokukhanya okuluhlaza, inzuzo yayo ephambili kukusebenza okuphezulu kokukhanya
Ngophuhliso kunye nenkqubela phambili yenzululwazi yezinto eziphathekayo, ukusebenza kakuhle okukhanyayo kuya kuphuculwa kakhulu kwiminyaka eyi-10 ezayo;ukusetyenziswa kwamandla aphantsi, ubomi benkonzo ende, izinto ezinokuphinda zisetyenziswe, kwaye akukho ngcoliseko lokusingqongileyo.Nangona ilizwe lethu laqala emva kwexesha, kule minyaka yakutsha nje liye laqalisa uphando olusebenzayo nophuhliso kunye nemigaqo-nkqubo yezoshishino nenkxaso.Xa kuthelekiswa nesibane se-incandescent, i-LED inomahluko omkhulu: ukukhanya kokukhanya ngokusisiseko kuhambelana nobukhulu bexesha elihamba phambili elihamba nge-diode ekhupha ukukhanya.Ukusebenzisa olu phawu, ukukhanya kwendawo engqongileyo kulinganiswa ne-sensor optical, ukukhanya okukhanyayo kutshintsha ngokwexabiso elilinganisiweyo, kwaye impembelelo yokuguqulwa kokukhanya kwendawo engqongileyo igcinwe, kwaye ukwakhiwa kudlulisa abantu ukuba basebenze ngokuvuya.Oku akugcini nje ukudala indawo ekhululekile kunye nokukhanya okuqhubekayo, kodwa kusebenzisa ngokupheleleyo ukukhanya kwendalo kwaye kusindisa kakhulu amandla.Ke ngoko, uphando kwitekhnoloji yokukhanya kwe-LED eguqukayo ibaluleke kakhulu.
02 imigaqo esisiseko
Olu yilo lusebenzisa ikholamu ukuthumela idatha kunye nendlela yokuskena umqolo ukuqonda iteksti ye-LED okanye umfanekiso.Le ndlela idityaniswe kunye nesekethe ye-hardware ukufezekisa injongo yokukhanya okufanayo ngokubanzi kwesikrini sokubonisa.Sebenzisa uphawu olubuthathaka lwe-photoresistor ekukhanyeni okujikeleze, qokelela utshintsho lwesibane esijikelezayo, uyiguqule ibe ngumqondiso wombane kwaye uyithumele kwi-microcomputer ye-single-chip, iprosesa ye-single-chip yenza ukusetyenzwa komqondiso, kwaye ilawula ubungakanani bomsebenzi wemveliso. Amaza e-PWM ngokomgaqo othile.Isekethe yokulawula amandla ombane yongezwa phakathi kwe-microcomputer ye-single-chip kunye nescreen esikhokelelweyo esibonisiwe ukuqonda uhlengahlengiso lokukhanya kwesikrini sokuboniswa yi-single-chip microcomputer.I-wave ye-PWM ehlengahlengisiweyo isetyenziselwa ukulawula isiphaluka sokulawula i-voltage yokutshintsha ukulungelelanisa igalelo lombane wesikrini sokubonisa, kwaye ekugqibeleni uqonde ukulawula ukukhanya kwesikrini sokubonisa.
03Iimpawu
Isekethe yokulawula ukuqaqamba okuguquguqukayo kwiscreen sokubonisa idiode yokukhanya, ebonakaliswa ngokuquka: isixhobo sokufaka ixabiso lokusetwa kwangaphambili kwesixhobo sokufaka ixabiso lomjikelo womsebenzi, ikhawuntala kunye nesithelekisi sobukhulu, apho isixhobo sokubala kunye nomjikelo wexabiso lokuseta kwangaphambili ixabiso lesixhobo ngokulandelelana sibala ixabiso. ithelekiswa nexabiso elisethiweyo ngaphambili lomjikelo womsebenzi kwisilinganisi sobungakanani ukulawula ixabiso lemveliso yomthelekisi.
04LED idimming system eguqukayo uyilo lwehardware
Ukukhanya kwe-LED kuhambelana nokuhamba kwangoku kuyo kwindlela eya phambili, kwaye ubungakanani bexesha langaphambili bunokutshintshwa ukuze kulungiswe ukukhanya kwe-LED.Okwangoku, ukukhanya kwe-LED kulungelelaniswa ngokubanzi ngokuhlengahlengisa imowudi yangoku esebenzayo okanye imowudi yokumodareyitha ububanzi be-pulse.Owokuqala unoluhlu olukhulu lohlengahlengiso, umgca olungileyo, kodwa ukusetyenziswa kwamandla aphezulu.Ngoko ayifane isetyenziswe.Indlela yokumodareyitha yobubanzi be-pulse isebenzisa i-frequency ephezulu yokutshintsha ii-leds, i-frequency switching frequency ingaphaya koluhlu olunokuthi lubonwe ngabantu, ukuze abantu bangaziva ubukho be-stroboscopic.Qonda ukukhanya kwe-LED eguqukayo.