Pantchito ya chiwonetsero chamtundu wamtundu wa LED, ntchito ya dalaivala IC ndikulandila zowonetsa (kuchokera pa khadi yolandila kapena purosesa yamavidiyo ndi magwero ena azidziwitso) zomwe zimagwirizana ndi protocol, kutulutsa mkati mwa PWM ndikusintha kwanthawi yapano, ndi kutsitsimutsa zotuluka ndi kuwala kwa grayscale.ndi mafunde ena okhudzana ndi PWM kuti aziwunikira ma LED.IC yozungulira yopangidwa ndi driver IC, logic IC ndi MOS switch imagwira ntchito limodzi pakuwonetsa kwa chiwonetsero cha LED ndikusankha mawonekedwe omwe akuwonetsa.
Tchipisi zoyendetsa ma LED zitha kugawidwa kukhala tchipisi tolinga wamba ndi tchipisi tacholinga chapadera.
Chip chotchedwa general-purpose chip, chip palokha sichinapangidwe mwapadera kwa LED, koma tchipisi tating'ono tating'ono tokhala ndi ntchito zina zowonetsera zowonetsera za LED (monga mndandanda-2-parallel shift register).
Chip chapadera chimatanthawuza chip dalaivala chomwe chimapangidwira mwapadera chiwonetsero cha LED molingana ndi mawonekedwe owala a LED.LED ndi chipangizo chamakono chamakono, ndiko kuti, pansi pa chikhalidwe cha machulukitsidwe conduction, kuwala kwake kumasintha ndi kusintha kwamakono, osati kusintha magetsi kudutsa.Chifukwa chake, chimodzi mwazinthu zazikulu za chip chodzipatulira ndikupereka gwero lanthawi zonse.Gwero lomwe lilipo nthawi zonse limatha kutsimikizira kuyendetsa kokhazikika kwa LED ndikuchotsa kuthwanima kwa LED, zomwe ndizofunikira kuti chiwonetsero cha LED chiwonetse zithunzi zapamwamba.Tchipisi zina zacholinga chapadera zimawonjezeranso ntchito zina zapadera pazofunikira zamafakitale osiyanasiyana, monga kuzindikira zolakwika za LED, kuwongolera kupindula kwapano komanso kukonza kwapano.
Kusintha kwa driver IC:
M'zaka za m'ma 1990, mawonekedwe a LED ankayang'aniridwa ndi mitundu imodzi ndi iwiri, ndipo ma IC oyendetsa magetsi okhazikika ankagwiritsidwa ntchito.Mu 1997, chipangizo choyamba chodzipatulira choyendetsa galimoto 9701 cha zowonetsera za LED chinawonekera m'dziko langa, chomwe chinachokera ku 16-level grayscale mpaka 8192-level grayscale, ndikuzindikira WYSIWYG ya kanema.Pambuyo pake, poyang'ana mawonekedwe otulutsa kuwala kwa LED, dalaivala wanthawi zonse wakhala chisankho choyamba kwa woyendetsa wamtundu wamtundu wa LED, ndipo dalaivala wa 16-channel wokhala ndi kuphatikiza kwakukulu walowa m'malo oyendetsa 8-channel.Chakumapeto kwa zaka za m'ma 1990, makampani monga Toshiba ku Japan, Allegro ndi Ti ku United States anayambitsa motsatizanatsatizana tchipisi ta madalaivala amakono 16 a LED.Masiku ano, kuti athetse vuto la ma waya a PCB a ma LED ang'onoang'ono, opanga ma IC oyendetsa madalaivala adayambitsa tchipisi ta 48-channel LED nthawi zonse.
Zizindikiro zamachitidwe a driver IC:
Pakati pazizindikiro zamawonekedwe a LED, kutsitsimula, kuchuluka kwa imvi ndi kufotokozera kwazithunzi ndi chimodzi mwazizindikiro zofunika kwambiri.Izi zimafuna kusasinthasintha kwakukulu kwamakono pakati pa ma LED owonetsera oyendetsa IC njira, mawonekedwe othamanga kwambiri komanso kuthamanga kwanthawi zonse.M'mbuyomu, kuchuluka kwa zotsitsimutsa, grey scale ndi magwiritsidwe ntchito anali ubale wamalonda.Kuti muwonetsetse kuti chizindikiro chimodzi kapena ziwiri zitha kukhala zabwinoko, ndikofunikira kupereka nsembe ziwiri zotsalazo.Pachifukwa ichi, ndizovuta kuti zowonetsera zambiri za LED zikhale ndi zabwino kwambiri padziko lonse lapansi pazogwiritsa ntchito.Kaya mlingo wotsitsimula siwokwanira, ndipo mizere yakuda imakonda kuwonekera pamene ikuwombera ndi zipangizo zamakina othamanga kwambiri, kapena grayscale sikokwanira, ndipo mtundu ndi kuwala sizikugwirizana.Ndi kupita patsogolo kwaukadaulo wa opanga ma driver IC, pakhala zopambana pamavuto atatu akulu, ndipo mavutowa atha.
Pogwiritsa ntchito mawonekedwe amtundu wa LED, pofuna kuonetsetsa kuti maso a wosuta atonthozedwa kwa nthawi yayitali, kuwala kochepa komanso imvi kwambiri kwakhala muyeso wofunikira kwambiri poyesa dalaivala IC.
Nthawi yotumiza: Oct-09-2022