Uhlalutyo lwe-AC-free LED's Constant Current Control Uhlalutyo lobuchwephesha

I-LED engena-AC ayiphumelelanga ukunqanda uhlalutyo olubalulekileyo lwetekhnoloji yolawulo lwangoku 1. I-AC-free LED ayilona tshintsho olubalulekileyo lwesixhobo. Ngamanye amazwi, akukho tshiphu ye-LED engenayo indlela yokusebenza yeFama yoMbane ye-AC. I-AC-free LED ekhoyo ngoku sisixhobo esilungiselelwe ngokukodwa kwi-chipset yangaphakathi. Lutshintsho nje kwisakhiwo sangaphakathi sesixhobo se-LED. Ngokuqinisekileyo Inqanaba lobugcisa alilula. Ukwaziswa kwe-AC-free LED lucatshulwe kakhulu ulwazi olupapashwe yiSeoul Semiconductor. Inokubonwa ukuba yibhlorho yesiqhelo yokulungisa ingxaki yokulungisa ingxaki yonxibelelwano kwinto ebizwa ngokuba yi-DC LED ingxaki yombane. Kubonakala ngathi inzuzo kukuba i-diode yokubuyisela isusiwe, kodwa ukuchasana kwe-LED kulinganiselwe. Xa igridi ikwincopho enkulu, ayisiyiyo inzuzo. Ngenxa yokuba kukulinganisa i-rectifier bridge circuit, isiqingatha kuphela sokuhamba kwangoku kwingalo yebhulorho emine, kwaye umthwalo we-DC uhamba kuwo wonke langoku, okubangelwa ukuhanjiswa kwangoku kokulayishwa kwee-LED kwiqela ngalinye. Kwaye ukukhanya okukhuphayo ukusebenza kakuhle, okufana ne-overcurrent kubangela ukubola kokukhanya kunye nokuchaphazela ubomi. Kulula ukusombulula. Ngokufutshane nje-kwesekethe i-DC LED iyasuswa. Jonga ngokusondeleyo kwisekethe, kwaye ngoku iye yaba yinto entle kwaye ibuyisela umva ii-LED kwiqela ngalinye. Enyanisweni, akufuneki ube nzima kakhulu ekuqaleni. 2. I-AC-free LED ayiphepheli iteknoloji ebalulekileyo yolawulo lwangoku. Ukususela kwintshayelelo, umphumo wokukhanya we-AC LED awuphezulu ngokwaneleyo kune-LED eqhelekileyo. Kuthiwa linqanaba lophuhliso. Umbhali ukholelwa ukuba isiseko seechips ze-LED ezifanayo ziyafana. Into ephambili yokukhawulela ubungakanani bokukhanya kwi-tile luhlobo lwesekethe yebhuloho yokulungisa. Khawucinge ukuba kuphela iqela le-LED elinokusebenza ngokuqhelekileyo, linika umdlalo ogcweleyo kwisiphumo sokukhanya, kwaye i-80% yamaqela amane asele asebenza kwimeko yokubhala phantsi kunye nemiphumo emibi yokukhanya. Nokuba ingaphuhliswa njani ngayo, iphantsi ngokwendalo kunokusebenza kwe-LED eqhelekileyo. Indlela yokuphucula kukushiya indlela yebhulorho yokulungiswa ngokungekho ngqiqweni. Akukho msebenzi oqhubekayo wokukhusela ngoku kwi-AC-free LED. Xa isetyenziswe, kufuneka idibaniswe nokumelana nokuhamba. Nangona kunjalo, xa i-current kumda we-voltage yonikezelo lwamandla inqunyelwe, kuyimfuneko ukusebenza kwimeko yokukhanya okuphantsi kombane ophantsi xa umbane oqhelekileyo okanye ophantsi. Umda wokumelana yindlela yokukhusela engafanelekanga. Ayinayo kuphela iziphene, kodwa ixhomekeke ekusebenziseni amandla ukuze isebenze, ukwenzela ukuba izinga lokusetyenziswa kwamandla lincitshiswe. Ukuba ufuna ukongeza i-PTC ukusombulula ingxaki yangoku ye-LED, awuyazi ngokwaneleyo malunga nokusebenza kwecandelo. I-PTC isetyenziswa kakhulu ekukhuselweni kwe-overcurrent kunye nokukhuselwa kwe-thermal. Xa i-current in circuit ikhulu kakhulu, xa i-PTC ifikelela kwiqondo lokushisa lokuhlala emva kokushisa, ixabiso lokumelana likhuphuka ngokukhawuleza ukuqhawula. Umjikelo wokuphelisa kumabonakude wombala uwusebenzisa ukuvelisa umphunga omkhulu wangoku wokuthomalalisa. I-Demagnetic. Xa i-resistor ye-PTC ichaphazeleka kubushushu obujikelezileyo, ukushisa kuya kuvulwa xa ubushushu buba ngaphezu kwendawo yokuhlala, enokudlala indima ekutshintsheni ukukhuselwa kwe-thermal. Ukuba ufuna ukuthembela kwiimpawu ezintle ze-coefficient ye-PTC yokuchasana ne-LED eqhubekayo yokukhusela impembelelo yangoku: Okokuqala, ukuxhathisa kwe-PTC kudlula okwangoku, kukho inkqubo yokufudumeza ixesha lokufudumala. Ikhoyo ngoku sele yonakalise i-LED. Okwesibini, ubushushu bokufudumala obuzenzekelayo be-PTC resistor bungakwazi ukulawula ngokuqhubekayo ngoku. Emva koko impembelelo yobushushu obuphezulu bokusingqongileyo kunye nomgangatho ophantsi unokutshintsha idigri ezininzi ukwenza "ixabiso lomsinga rhoqo" litshintshe lingabinantsingiselo. Ngaba kunokwenzeka ukuba izixhobo eziqhelekileyo ze-LED zinokuba lula ukuhamba ngoku ngoku? Ngelishwa. Kwaye ngokuqhelekileyo unxibelelwano oluhamba rhoqo luyinkathazo ngaphezu kwe-DC eqhubekayo yangoku. Enyanisweni, kunokubakho zonke iintlobo zenkxaso yomgangatho ophezulu weMveliso. Esikhundleni samandla, abavelisi be-LED baya kuba namandla ngakumbi ngokwethekhnoloji yesekethe, kwaye kungcono ukugxila ekuphuhliseni ixabiso eliphantsi kunye nemveliso yokukhanya kwe-LED ephezulu.