74FCT3807DQGI8 ic cihp isekethe ehlanganisiwe ye-elekthronikhi eshisayo ithengisa isevisi ye-bom entsha kanye nokwangempela indawo eyodwa kuphela yokuthenga i-bom

1.I-LED wuhlobo olusha lwedivayisi yomthombo wokukhanya we-semiconductor esebenza kahle kakhulu futhi evumelana nemvelo.Uma kuqhathaniswa neminye imithombo yokukhanya, i-LED inezinzuzo ezinhle ekukhanyeni kwezimoto futhi inethuba elibanzi lokufaka isicelo.Izindlela ezihlukene zokuhlanganisa ama-LED ochungechungeni nokuhambisana ukuze kwakhiwe ama-LED alandelanayo asetshenziselwa ukuhlangabezana nezidingo zokuqina kokukhanya kwezimoto.

Ngokuthuthukiswa kobuchwepheshe kanye nokuthuthukiswa okusheshayo komnotho wezenhlalakahle, imikhiqizo ye-LED isetshenziswe kabanzi empilweni yabantu.Ikhulu lama-21, ukukhiqizwa kwe-LED kanye nesilinganiso semakethe kufinyelele ezingeni elingakaze libonwe ngaphambili, imakethe yesicelo ebaluleke kakhulu ye-LED yizindawo ezihlukahlukene zokubonisa, izinhlobo ezihlukahlukene zomakhalekhukhwini, njalonjalo.Ngaphezu kwalokho, ama-LED adlala indima ebalulekile emigwaqweni, ukukhanyisa kwezakhiwo, ukuhlobisa kwangaphakathi, nezinye izindawo eziningi.Ngokuthuthuka okusheshayo kwemboni yezimoto, amasekethe abashayeli be-LED asetshenziswe kakhulu kugesi wesimanje wezimoto, futhi imithombo yangaphambilini yokukhanya kwezimoto njengamalambu angaphambili kancane kancane athathelwa indawo yiwo.Ngasikhathi sinye, i-LED inokukhanya okuphezulu okuphezulu, isikhathi sokuphendula esifushane (impendulo esheshayo), ukwakheka okuhlangene (usayizi omncane), impilo ende yesevisi, nezinye izici, izosetshenziswa ekukhanyeni kwezimoto futhi inobandlululo oluqinile lombala kanye ne-anti. -Izici zokuxhopha.Kodwa-ke, ngenxa yokulinganiselwa kwezinto ezihlukahlukene, i-LED isenokukhubazeka okuthile, idinga ukuqhubeka nokuthuthukisa ubuchwepheshe be-LED, ukuze ihlangabezane kangcono nezidingo ze-electronics yezimoto.

2.I-LED iyidivayisi ye-semiconductor ekhipha ukukhanya kwe-diode, eyenziwe ngama-semiconductors athile ayinhlanganisela.I-LED iwumthombo wokukhanya onokumelana kahle nokudlidliza nokushaqeka, ivikelwe ikepisi ye-epoxy resin, umongo mncane kakhulu, futhi umnyombo uwumgogodla we-PN junction, ngakho unezici ze-PN junction, okungukuthi ukuqhuba phambili. , ukunqamula ukuhlehla kanye nokwehlukana kwe-overvoltage, njll. Ezikhethekile Ezithile Ngaphansi kwezimo ezithile ezikhethekile, kungase futhi kuphawulwe njengesithumeli sokukhanya.

3.I-LED drive circuits ihlukaniswe yaba izinhlobo ezimbili zokushayela: i-voltage drive engaguquki kanye nedrayivu yamanje yamanje.Ngenxa yohlobo lwe-LED oluhlala njalo lwamanje, esakhiweni se-PN junction-based, kungaba ubudlelwano obucacile bokumela i-LED voltage nezinguquko zamanje, ngakho-ke isetshenziswa kabanzi.Indlela yokushayela e-Constant-voltage ngokuvamile iwukusebenzisa isihlungi se-resissive capacitance step-down noma i-transformer step-down filtering, ukusetshenziswa kwama-voltage regulator diode noma indlela yokushintsha amandla kagesi, kugesi we-LED, kodwa izici zokukhanya kwe-LED zizoba okwamanje. eshintsha njalo ngaphansi komthelela ohambisanayo.Isilawuli somugqa endleleni yokushayela yamanje engaguquki sinezinhlobo ezimbili: okuhambisanayo nochungechunge, umgogodla i-triode yamandla noma i-MOSFET esebenza endaweni yomugqa njengento ephikisayo eguquguqukayo ukuze ulawule umthwalo.i-voltage kanye namanje kuzo zombili iziphetho ze-LED akubona ubudlelwano bomugqa, akukwazi ukunikwa amandla ngokuqondile umthombo kagesi, futhi kudinga ukukhawulwa ngokukhawulela yamanje ukuze kuvinjwe amandla amanje ngokweqile futhi kugwenywe ukulimala kwe-LED.ukukhanya okukhanyayo kwe-LED kanye namanje akukona I-flux ekhanyayo ayilingani namanje, i-flux ekhanyayo iyanda namanje, ithwala amazinga ahlukene wamandla kagesi, ukumelana kwangaphakathi, kanye nezithiyo ezingaba khona azifani, ngakho azikwazi ukusetshenziswa. ngqo ngokuhambisana.Khetha imodi yokushayela efanele nephusile kufanele icabangele uhlelo lokusebenza kanye nokusebenza kwayo okunengqondo, kunoma yiluphi uhlobo lwemodi, okudingekayo ukukhetha kumodi yokulawula ukunikezwa kwamandla, uhlelo lokusebenza oluvame kakhulu yi-PFM, imodi ye-PWM, nokulawulwa kwefilimu yamaslayidi, okuyinto ilula futhi iguquguquka yesakhiwo semodi yokulawula ye-PWM, ingagcina imvamisa ezinzile ekusebenzeni, kodwa futhi idinga ukucabangela ukusuka endaweni yokubuka yokonga amandla nezinye izikhombisi-ndlela, ukuthuthukisa ukukhanya kwe-LED okusheshayo, nokunciphisa ukusetshenziswa kwamandla e-LED.