Tare da haɓakawa da aikace-aikacen nunin LED na cikin gida, ana iya ganin cewa ana amfani da nunin LED da yawa a cibiyar umarni, cibiyar kulawa har ma da ɗakin studio.Koyaya, daga aikin gabaɗaya na tsarin nunin LED, shin waɗannan nunin zasu iya biyan bukatun masu amfani?Hotunan da aka nuna akan waɗannan nunin LED sun yi daidai da hangen nesa na ɗan adam?Shin waɗannan nunin LED suna iya jure kusurwoyin rufe kyamara daban-daban?Waɗannan su ne batutuwan da ya kamata a yi la'akari da su don nunin LED.Koyaya, sikelin launin toka shine mabuɗin don haɓaka ƙarancin nunin haske na nunin LED.A halin yanzu, masu amfani suna da buƙatu mafi girma da mafi girma don ingancin hoto na allon nuni, kuma yana da mahimmanci ga allon nuni na LED don cimma tasirin "ƙananan haske, babban launin toka".Don haka zan yi takamaiman bincike daga hangen nesa matakin launin toka wanda ke shafar tasirin nunin LED.
- Menene ma'aunin launin toka?
- Menene tasirin launin toka akan allon?
- Akwai hanyoyi guda biyu don sarrafa matakin launin toka na nunin jagora.
1.Menene ma'aunin launin toka?
Hakanan ana iya kiran matakin launin toka na nunin LED.Matsayin launin toka na nunin LED yana nufin matakin haske wanda za'a iya bambanta shi daga mafi duhu zuwa mafi haske a daidai matakin haske na nunin LED.A gaskiya ma, matakin launin toka kuma ana iya kiransa halftone, wanda ake amfani dashi don canja wurin bayanan hoto zuwa katin sarrafawa.Matsayin launin toka na asali na nuni na LED zai iya zama 16, 32, 64. Tare da ci gaban fasaha, 256 a halin yanzu ana amfani da shi ta hanyar masana'antun yau da kullum.Ana sarrafa matakin launin toka na allon nunin LED zuwa matakan 16, 32, 64 da 256 na pixels na fayil ta hanyar sarrafa matrix, ta yadda hoton da aka watsa ya fi fitowa fili.Ko monochrome, launi biyu ko cikakken launi, don nuna hotuna ko rayarwa, wajibi ne a daidaita matakin launin toka na kowane LED wanda ya zama tushen pixel na kayan.Kyakkyawan daidaitawa shine abin da yawanci muke kira matakin launin toka.
Anan akwai jerin don ƙara bayyanawa.Misali, idan tsantsar ja shine 255 kuma mafi kyawun ja shine 0, akwai launuka 256.Idan kuna son nuna hotuna tare da abu iri ɗaya, dole ne kuyi amfani da fasahar watsa launi 256.Misali, idan darajar launi na firam a cikin bidiyon ja ce 69, kuma allon nunin LED yana da matakan launin toka 64 kawai, ba za a iya nuna launi a cikin bidiyo mai launi akai-akai ba.Ana iya tunanin sakamako na ƙarshe, kuma yana da tabbacin cewa hoton yana da hankali kuma yana da kyau.
Tukwici: A halin yanzu, matsakaicin matakin launin toka na allon nunin LED shine 256, wanda kuma aka sani da 65536, wanda ba za a iya cewa ba daidai ba, saboda kowane katakon fitila na allon nunin LED mai cikakken launi yana kunshe da RGB launuka uku, launi daya yana da launin toka 256. matakan, kuma jimlar adadin shine 65536.2.
2.Menene tasirin launin toka akan allon?
Matsayin launin toka na babban allo na lantarki na LED yana nufin canjin matakan launi daban-daban tsakanin kololuwar launi mai duhu da kololuwar launi mai haske.Gabaɗaya, sikelin launin toka na nunin babban ma'anar LED na gargajiya yana tsakanin 14bit da 16bit, tare da matakan launi sama da 16384, wanda zai iya nuna ƙarin cikakkun canje-canje na launukan hoto.Idan matakin launin toka bai isa ba, matakin launi ba zai isa ba ko kuma matakin launin gradient ba zai yi kyau sosai ba, kuma launin hoton da aka kunna ba zai cika bayyani ba.Zuwa babba, tasirin nuni na nunin nunin LED yana raguwa.Idan hoton da aka ɗauka tare da shutter 1/500 yana da bulogin launi a bayyane, yana nuna cewa matakin launin toka na allon yana da ƙasa.Idan kun yi amfani da mafi girman saurin rufewa, kamar 1/1000s ko 1/2000s, za ku ga fitattun facin launi, waɗanda za su yi tasiri sosai ga kyawun hoto gaba ɗaya.
3.Akwai hanyoyi guda biyu don sarrafa matakin launin toka na nunin jagora.
Ɗayan shine canza canjin halin yanzu, ɗayan kuma shine juzu'in faɗin bugun jini.
1. Canja halin yanzu yana gudana ta cikin LED.Gabaɗaya, bututun LED suna ba da damar ci gaba da aiki na yanzu na kusan 20mA.Sai dai jikewa na LED LEDs, ma'aunin launin toka na sauran LEDs ya yi daidai da na yanzu da ke gudana ta cikin su;
2. Wata hanya kuma ita ce ta yin amfani da inertia na gani na idon ɗan adam don gane ikon sarrafa launin toka ta hanyar amfani da hanyar daidaita girman bugun bugun jini, wato, lokaci-lokaci canza girman bugun bugun haske (watau duty cycle).Matukar sake zagayowar hasken wutar lantarki ya yi gajeru (watau adadin wartsakewa ya isa sosai), idon ɗan adam ba zai iya jin hasken da ke fitar da pixels yana girgiza ba.Saboda PWM ya fi dacewa da sarrafa dijital, kusan dukkanin allon LED suna amfani da PWM don sarrafa matakin launin toka a yau lokacin da ake amfani da microcomputers don samar da abun ciki na LED.Tsarin sarrafawa na LED yawanci yana kunshe da babban akwatin sarrafawa, allon dubawa da nuni da na'urar sarrafawa.
Babban akwatin sarrafawa yana samun bayanan haske na kowane launi na pixel allo daga katin nuni na kwamfutar, sannan ya sake rarraba shi zuwa allunan dubawa da yawa.Kowane allon dubawa yana da alhakin sarrafa layuka da yawa (ginshiƙai) akan allon nunin LED, kuma ana watsa siginar nuni da sarrafa siginar LED akan kowane layi (ginshiƙi) ta hanyar jeri.
A halin yanzu, akwai hanyoyi guda biyu na watsa sigina na sigina na nuni:
1. Daya shine a tsakiya sarrafa matakin launin toka na kowane pixel point akan allon dubawa.Allon dubawa yana lalata darajar matakin launin toka na kowane jeri na pixels daga akwatin sarrafawa (watau ƙwanƙwasa faɗin bugun jini), sannan yana watsa siginar buɗewa na kowane jere na LED zuwa LED mai dacewa a cikin nau'in bugun jini (1 idan ya kasance. lit, 0 idan ba a kunna shi ba) a cikin yanayin layin layi don sarrafa ko an kunna shi.Wannan hanyar tana amfani da ƙananan na'urori, amma adadin bayanan da ake watsawa a jere yana da girma.Domin a cikin sake zagayowar hasken wutar lantarki, kowane pixel yana buƙatar bugun jini 16 a matakan 16 na launin toka da bugun jini 256 a matakan 256 na launin toka.Saboda ƙayyadaddun mitar aiki na na'urar, allon LED zai iya cimma matakan 16 kawai na launin toka.
2.Ɗayan shine ƙwanƙwasa faɗin bugun jini.Serial allon watsa abun ciki na allon dubawa ba siginar sauyawa na kowane LED ba ne, amma ƙimar launin toka na binaryar 8-bit.Kowane LED yana da nasa na'ura mai sarrafa bugun jini don sarrafa lokacin haske.Ta wannan hanyar, a cikin sake zagayowar hasken wutar lantarki, kowane pixel yana buƙatar bugun jini 4 kawai a matakan 16 na launin toka da bugun jini 8 a matakan 256 na launin toka, yana rage saurin watsa shirye-shiryen.Tare da wannan hanyar da aka rarraba ikon sarrafa launin toka na LED, ana iya samun sauƙin sarrafa matakin 256.
Akwai jerin fuska da yawa a cikin ɗakin MPLED waɗanda suka kai matakin launin toka na 16bit, kamar ST Pro, WS, WA, da sauransu, waɗanda ke iya nuna daidai ainihin launin hotuna da bidiyo.A cikin yanayin daukar hoto mai sauri, toshe launi na sama ba zai iya bayyana ba.An yi allon fuska ne da kayan albarkatun ƙasa masu daraja, waɗanda samfuran ƙima ne a cikin masana'antar.Muna ba da zaɓuɓɓukan girman tazara na pixel iri-iri, da kuma hanyoyin magance nau'ikan ayyukan.Idan kuna buƙatar siyan ƙaramin ƙaramin allo kwanan nan, da fatan za a tuntuɓe mu, jagoran sabis na tsayawa ɗaya-MPLED.
Lokacin aikawa: Nuwamba-15-2022
