Imikhiqizo yomshayeli wesibonisi se-LED ikakhulukazi ihlanganisa ama-chips omshayeli we-row scan nama-colum driver chips, futhi izinkambu zabo zohlelo lokusebenza ikakhulukaziizikrini ze-LED zokukhangisa zangaphandle,izibonisi ze-LED zasendlini kanye nemibukiso ye-LED yesitobhi sebhasi. Ngokombono wohlobo lwesibonisi, ifaka isibonisi se-monochrome LED, isibonisi se-LED esinemibala emibili nesibonisi se-LED esinemibala egcwele.
Emsebenzini wesibonisi sombala ogcwele we-LED, umsebenzi womshayeli we-IC ukuthola idatha yokubonisa (kusukela ekhadini elamukelayo noma iphrosesa yevidiyo neminye imithombo yolwazi) evumelana nephrothokholi, ukukhiqiza ngaphakathi kwe-PWM kanye nezinguquko zesikhathi samanje, kanye vuselela okukhiphayo kanye ne-grayscale yokukhanya. kanye neminye imisinga ye-PWM ehlobene ukuze kukhanye ama-LED. I-peripheral IC eyakhiwe umshayeli IC, i-logic IC kanye neswishi ye-MOS isebenza ndawonye kumsebenzi wesibonisi wesibonisi esiholayo futhi inquma umphumela wokubonisa esiwulethayo.
Ama-chips omshayeli we-LED angahlukaniswa abe ama-chips enhloso ejwayelekile kanye nama-chips enhloso ekhethekile.
I-chip yenjongo evamile, i-chip ngokwayo ayiklanyelwe ngokukhethekile ama-LED, kodwa amanye ama-logic chips (njengamarejista we-serial 2-parallel shift shift) anemisebenzi ethile enengqondo yesibonisi esiholayo.
I-chip ekhethekile ibhekisela ku-chip yomshayeli eklanyelwe ngokukhethekile isibonisi se-LED ngokuvumelana nezici ezikhanyayo ze-LED. I-LED iyisisetshenziswa sesici samanje, okungukuthi, ngaphansi kwesisekelo se-saturation conduction, ukukhanya kwayo kushintsha ngokushintsha kwamanje, kunokuba kulungiswe i-voltage kuyo yonke. Ngakho-ke, esinye sezici ezinkulu ze-chip ezinikele ukuhlinzeka ngomthombo wamanje oqhubekayo. Umthombo wamanje ongashintshi ungaqinisekisa ukushayela okuzinzile kwe-LED futhi uqede ukucwayiza kwe-LED, okuyimfuneko ukuze isibonisi se-LED sibonise izithombe zekhwalithi ephezulu. Amanye ama-chips anezinjongo ezikhethekile futhi engeza imisebenzi ethile ekhethekile yezidingo zezimboni ezahlukahlukene, njengokutholwa kwephutha le-LED, ukulawulwa kwenzuzo yamanje kanye nokulungiswa kwamanje.
Ukuvela kwe-ICs yomshayeli
Ngawo-1990s, izinhlelo zokusebenza zokubonisa i-LED zazibuswa umbala owodwa nokabili, futhi kwasetshenziswa ama-IC ashayela kagesi angashintshi. Ngo-1997, izwe lami lavela i-chip yokulawula idrayivu yokuqala ezinikele engu-9701 yesibonisi se-LED, esukela ku-grayscale enamazinga ayi-16 yaya ku-8192-level grayscale, ibona i-WYSIWYG yevidiyo. Ngokulandelayo, uma kubhekwa izici ezikhipha ukukhanya kwe-LED, umshayeli wamanje ongaguquki useyinketho yokuqala kumshayeli obonisa umbala ogcwele we-LED, kanti umshayeli wesiteshi esingu-16 onokuhlanganisa okuphezulu usethathe isikhundla somshayeli weziteshi ezingu-8. Ngasekupheleni kwawo-1990, izinkampani ezifana ne-Toshiba e-Japan, i-Allegro kanye ne-Ti e-United States yethula ngokulandelana ama-chips amanje okushayela e-LED angu-16. Namuhla, ukuze kuxazululwe inkinga yezintambo ze-PCBizibonisi ezincane ze-LED, abanye abakhiqizi be-IC yabashayeli bethule ama-chips amanje amanje omshayeli ahlanganiswe kakhulu angama-48 e-LED.
Izinkomba zokusebenza zomshayeli IC
Phakathi kwezinkomba zokusebenza zesibonisi se-LED, izinga lokuvuselela, izinga elimpunga nokuvezwa kwesithombe kungenye yezinkomba ezibaluleke kakhulu. Lokhu kudinga ukuvumelana okuphezulu kwamanje phakathi kwamashaneli e-IC omshayeli wesibonisi we-LED, izinga lokuxhumana olunesivinini esikhulu kanye nesivinini sokuphendula esiqhubekayo samanje. Esikhathini esedlule, isilinganiso sokuvuselela, isikali esimpunga kanye nesilinganiso sokusetshenziswa kwakuwubudlelwano bokuhwebelana. Ukuqinisekisa ukuthi inkomba eyodwa noma ezimbili zingaba ngcono, kuyadingeka ukunikela ngokufanelekile izinkomba ezimbili ezisele. Ngalesi sizathu, kunzima ngezibonisi eziningi ze-LED ukuthi zibe nezindawo ezinhle kakhulu zomhlaba ezinhlelweni zokusebenza. Kungenzeka ukuthi izinga lokuvuselela alanele, futhi imigqa emnyama ijwayele ukubonakala ngaphansi kwemishini yekhamera enesivinini esikhulu, noma i-grayscale ayanele, futhi umbala nokukhanya akuhambisani. Ngokuthuthuka kobuchwepheshe babakhiqizi be-IC yabashayeli, kube khona impumelelo ezinkingeni ezintathu eziphezulu, futhi lezi zinkinga sezixazululiwe. Okwamanje, izibonisi eziningi ze-SRYLED LED zinezinga eliphezulu lokuvuselela elingu-3840Hz, futhi ayikho imigqa emnyama ezovela uma kuthwebula izithombe ngemishini yekhamera.
Amathrendi kuma-IC abashayeli
1. Ukonga amandla. Ukonga amandla wukufuna kwaphakade kokuboniswa kwe-LED, futhi kuphinde kube yimibandela ebalulekile yokucabangela ukusebenza komshayeli IC. Ukonga amandla komshayeli we-IC ikakhulukazi kuhlanganisa izici ezimbili. Enye iwukunciphisa ngokuphumelelayo i-voltage yephoyinti le-inflection yamanje engashintshi, ngaleyo ndlela kuncishiswe ukunikezwa kwamandla okuvamile okungu-5V ukuze kusebenze ngaphansi kuka-3.8V; okunye ukunciphisa i-voltage yokusebenza kanye nokusebenza kwamanje komshayeli we-IC ngokuthuthukisa i-algorithm ye-IC kanye nomklamo. Njengamanje, abanye abakhiqizi bethule umshayeli wamanje ongu-IC ongaguquki one-voltage ephendukayo engu-0.2V, ethuthukisa izinga lokusebenzisa i-LED ngaphezu kuka-15%. Amandla kagesi angaphansi ngo-16% kunalawo emikhiqizo evamile ukunciphisa ukukhiqizwa kokushisa, ukuze ukusebenza kahle kwamandla kwezibonisi ze-LED kuthuthukiswe kakhulu.
2. Ukuhlanganisa. Ngokuncipha okusheshayo kokuphakama kwephikseli yesibonisi se-LED, amadivayisi apakishiwe azofakwa endaweni yeyunithi akhuphuka ngokuphindaphinda kwejiyomethri, okwandisa kakhulu ukuminyana kwengxenye yendawo yokushayela yemojuli. UkuthathaIsikrini se-LED esincane se-P1.9 njengesibonelo, imojuli ye-15-scan 160*90 idinga ama-IC omshayeli wamanje angu-180, amashubhu olayini angama-45, kanye nama-2 138s. Ngamadivayisi amaningi kangaka, isikhala sezintambo esitholakalayo ku-PCB siba siminyene kakhulu, okwandisa ubunzima bomklamo wesifunda. Ngesikhathi esifanayo, ukuhlelwa okunjalo okugcwele kwezingxenye kungabangela kalula izinkinga ezifana ne-soldering engalungile, futhi kunciphise ukuthembeka kwe-module. Kusetshenziswa ama-IC omshayeli ambalwa, futhi i-PCB inendawo enkulu yokufaka izintambo. Isidingo esivela ohlangothini lwesicelo siphoqa umshayeli u-IC ukuthi aqale umzila wobuchwepheshe odidiyelwe kakhulu.
Njengamanje, abahlinzeki be-IC yomshayeli abajwayelekile embonini baye bethula ngokulandelanayo ama-IC omshayeli wamanje we-48-channel we-LED ahlala njalo, ahlanganisa amasekethe amakhulu omngcele kumshayeli we-IC wafer, onganciphisa inkimbinkimbi yomklamo webhodi lesifunda le-PCB. . Iphinde igweme izinkinga ezibangelwa amakhono okuklama noma umehluko wokuklama wonjiniyela abavela kubakhiqizi abahlukahlukene.
Isikhathi sokuthumela: Mar-03-2022
