Ngokuthuthukiswa kanye nokusetshenziswa kwesibonisi se-LED sangaphakathi, kungabonakala ukuthi isibonisi se-LED sisetshenziswa kabanzi esikhungweni sokuyala, isikhungo sokuqapha kanye nesitudiyo.Nokho, kusukela ekusebenzeni kukonke kwesistimu yokubonisa ye-LED, ingabe lezi zibonisi zingahlangabezana nezidingo zabasebenzisi?Ingabe izithombe eziboniswa kulezi zibonisi ze-LED ziyahambisana nokubonwa komuntu?Ingabe lezi zibonisi ze-LED zingamelana nama-engeli ahlukene wokuvala ikhamera?Lezi yizindaba ezidinga ukucatshangelwa ekubonisweni kwe-LED.Nokho, isikali esimpunga siwukhiye wokuthuthukisa umphumela wokubonisa ukukhanya okuphansi kwezibonisi ze-LED.Njengamanje, abathengi banezidingo eziphakeme neziphakeme zekhwalithi yesithombe sesikrini esiboniswayo, futhi kubaluleke nakakhulu ukuthi isikrini sokubonisa se-LED sifinyelele umphumela "wokukhanya okuphansi, okumpunga okuphezulu".Ngakho-ke ngizokwenza ukuhlaziya okuqondile ngokombono wezinga elimpunga elithinta umphumela wokubonisa we-LED.
- Yini isikali esimpunga?
- Uyini umthelela we-grayscale esikrinini?
- Kunezindlela ezimbili zokulawula izinga elimpunga lesibonisi esiholayo.
1.Yini isikali esimpunga?
Izinga elimpunga lesibonisi se-LED lingaphinda libizwe ngokukhanya kwe-LED.Ileveli empunga yesibonisi se-LED isho ileveli yokukhanya engahlukaniswa kusukela kokumnyama kakhulu kuye kokugqama kakhulu kuleveli yokukhanya efanayo yesibonisi se-LED.Eqinisweni, izinga elimpunga lingabuye libizwe ngokuthi i-halftone, esetshenziselwa ukudlulisa idatha yesithombe ekhadini lokulawula.Ileveli empunga yasekuqaleni yesibonisi se-LED ingaba ngu-16, 32, 64. Ngokuqhubeka kobuchwepheshe, u-256 okwamanje usetshenziswa abakhiqizi abajwayelekile.Izinga elimpunga lesikrini sokubonisa se-LED licutshungulwa libe ngamaleveli angu-16, 32, 64 kanye nangu-256 wamaphikseli wefayela ngokucubungula i-matrix, ukuze isithombe esidlulisiwe sicace kakhudlwana.Kungakhathaliseki ukuthi isikrini se-monochrome, esinemibala emibili noma esinemibala egcwele, ukuze sibonise izithombe noma ukugqwayiza, kuyadingeka ukulungisa ileveli empunga ye-LED ngayinye ehlanganisa iphikseli yomthombo wento.Ubunono bokulungisa yilokho esivame ukukubiza ngokuthi izinga elimpunga.
Nalu uhlu lokukwenza ucace kakhudlwana.Isibonelo, uma okubomvu okumsulwa kungu-255 futhi okubomvu okugqamile kungu-0, kunemibala engama-256.Uma ufuna ukubonisa izithombe ezinento efanayo, ingabe kufanele usebenzise ubuchwepheshe bokudlulisa imibala engu-256.Isibonelo, uma inani lombala wohlaka kuvidiyo libomvu ngu-69, futhi isikrini sokubonisa se-LED sinamazinga ampunga angu-64 kuphela, umbala kuvidiyo yombala awukwazi ukuboniswa ngokujwayelekile.Umphumela wokugcina ungacatshangwa, futhi kusobala ukuthi isithombe sicophelela futhi sihle.
Ithiphu: Okwamanje, izinga eliphezulu elimpunga lesikrini sokubonisa se-LED lingu-256, elibuye laziwe ngokuthi 65536, okungeke kushiwo okungalungile, ngoba ubuhlalu besibani ngasinye sesikrini sokubonisa se-LED esinombala ogcwele sakhiwe ngemibala emithathu ye-RGB, umbala owodwa unompunga ongu-256. amazinga, futhi inani eliphelele lingu-65536.2.
2.Uyini umthelela we-grayscale esikrinini?
Izinga elimpunga lesikrini esikhulu se-elekthronikhi se-LED libhekisela ekushintsheni kwamazinga ombala ahlukene phakathi kombala omnyama ophakeme nogqamile ogqamile.Ngokuvamile, isikali esimpunga sesibonisi se-LED esingokwesiko sencazelo ephezulu siphakathi kuka-14bit no-16bit, namazinga ombala angaphezu kuka-16384, angabonisa izinguquko ezinemininingwane eyengeziwe yemibala yesithombe.Uma izinga elimpunga linganele, ileveli yombala izobe inganele noma ileveli yombala wegradient ngeke ishelele ngokwanele, futhi umbala wesithombe esidlalwayo ngeke uboniswe ngokugcwele.Ngokwezinga elikhulu, umphumela wokubonisa wesikrini se-LED uncishisiwe.Uma isithombe esithathwe nge-shutter engu-1/500s sinamabhulokhi anombala asobala, kukhombisa ukuthi izinga elimpunga lesikrini liphansi.Uma usebenzisa isivinini esikhulu sokuvala, esifana no-1/1000 noma 1/2000s, uzobona amapheshana ombala asobala kakhulu, okuzothinta kakhulu ubuhle besithombe sisonke.
3.Kunezindlela ezimbili zokulawula izinga elimpunga lesibonisi esiholayo.
Enye iwukushintsha ukugeleza kwamanje, kanti enye iwukushintshashintsha kobubanzi be-pulse.
1. Shintsha ukugeleza kwamanje ku-LED.Ngokuvamile, amashubhu e-LED avumela ukusebenza okuqhubekayo okungaba ngu-20 mA.Ngaphandle kokugcwaliswa kwama-LED abomvu, isikali esimpunga samanye ama-LED ngokuyisisekelo silingana namanje agelezayo kuwo;
2. Enye indlela iwukusebenzisa isimo esibonakalayo seso lomuntu ukuze ubone ukulawula okumpunga ngokusebenzisa indlela yokushintshanisa ububanzi be-pulse, okungukuthi, ukushintsha ngezikhathi ezithile ububanzi be-pulse light (okungukuthi umjikelezo womsebenzi).Uma nje umjikelezo wokukhanyisa okuphindaphindiwe mfushane ngokwanele (okungukuthi izinga lokuvuselela liphezulu ngokwanele), iso lomuntu alikwazi ukuzwa amaphikseli akhipha ukukhanya enyakaza.Ngenxa yokuthi i-PWM ifaneleka kakhulu ekulawuleni idijithali, cishe zonke izikrini ze-LED zisebenzisa i-PWM ukuze zilawule izinga elimpunga namuhla lapho ama-microcomputer esetshenziswa kabanzi ukuze anikeze okuqukethwe okuboniswa kwe-LED.Uhlelo lokulawula lwe-LED luvame ukwakhiwa ngebhokisi lokulawula eliyinhloko, ibhodi lokuskena kanye nedivayisi yokubonisa nokulawula.
Ibhokisi lokulawula eliyinhloko lithola idatha yokukhanya yombala ngamunye wephikseli yesikrini ekhadini lokubonisa lekhompyutha, bese liyisabalalisa kabusha kumabhodi okuskena amaningana.Ibhodi lokuskena ngalinye linomthwalo wemfanelo wokulawula imigqa eminingana (amakholomu) kusikrini sokubonisa se-LED, futhi isibonisi nokulawula amasignali ama-LED kumugqa ngamunye (ikholomu) adluliselwa ngendlela ye-serial.
Njengamanje, kunezindlela ezimbili zokudluliswa kwe-serial kwamasiginali okulawula isibonisi:
1. Enye iwukulawula endaweni eyodwa izinga elimpunga lephoyinti ngalinye lephikseli ebhodini lokuskena.Ibhodi lokuskena libola inani lezinga elimpunga lomugqa ngamunye wamaphikseli ukusuka ebhokisini lokulawula (okungukuthi, ukuguquguquka kobubanzi be-pulse), bese lidlulisela isignali yokuvula yomugqa ngamunye we-LED ku-LED ehambisanayo ngendlela ye-pulse (1 uma lit, 0 uma lingakhanyi) kumodi ye-serial ukuze ulawule ukuthi liyakhanyiswa yini.Le ndlela isebenzisa amadivaysi ambalwa, kodwa inani ledatha elithunyelwa nge-serial likhulu.Ngoba emjikelezweni wokukhanyisa okuphindaphindiwe, iphikseli ngalinye lidinga ama-pulses angu-16 kumazinga angu-16 okumpunga nama-pulses angu-256 kumazinga angu-256 okumpunga.Ngenxa yomkhawulo wokusebenza kwedivayisi, izikrini ze-LED zingafinyelela kuphela amazinga angu-16 okumpunga.
2.Okukodwa ukuguquguquka kobubanzi be-pulse.Ibhodi lokuskena okuqukethwe kochungechunge lokudlulisa akuyona isignali yokushintsha ye-LED ngayinye, kodwa inani elimpunga lika-8-bit kanambambili.I-LED ngayinye ine-modulator yayo yobubanzi be-pulse ukulawula isikhathi sokukhanyisa.Ngale ndlela, emjikelezweni wokukhanyisa okuphindaphindiwe, i-pixel ngayinye idinga kuphela ama-pulses angu-4 emazingeni angu-16 okumpunga kanye nama-pulses angu-8 kumazinga angu-256 okumpunga, kunciphisa kakhulu imvamisa yokudlulisela kwe-serial.Ngale ndlela yokulawula ukwahlukaniswa kwe-LED grayscale, ukulawulwa kwe-grayscale kweleveli engama-256 kungenziwa kalula.
Kukhona uchungechunge oluningi lwezikrini egumbini le-MPLED ezifinyelele izinga elimpunga le-16bit, njenge-ST Pro, WS, WA, njll., ezingabonisa ngokuphelele umbala wangempela wezithombe namavidiyo.Endabeni yokuthatha izithombe ngesivinini esikhulu, amabhlogo ombala angenhla awakwazi ukuvela.Izikrini zenziwe ngezinto zokusetshenziswa ezisezingeni eliphezulu, okuyimikhiqizo esezingeni eliphezulu embonini.Sihlinzeka ngezinketho zosayizi wesikhala samaphikseli ahlukahlukene, kanye nezixazululo ezahlukahlukene zamaphrojekthi.Uma udinga ukuthenga iqoqo lezikrini ezincane ze-pitch muva nje, sicela usithinte, umholi we-led one-stop service.-MPLED.
Isikhathi sokuthumela: Nov-15-2022
