Abin da gwajin launin allo ke nuna maka a zahiri
Gwajin launin allo yana ɗaya daga cikin hanyoyi mafi sauri don yanke hukunci akan yadda allonka ke da kyau a zahiri. Maimakon kallon desktop cike da icon da window, kana cika duk fuskar allo da launi ɗaya cikakke, sannan da gradient santsi, ka lura da yadda panel ɗin ke yin hali. Lahani da ke ɓoye a bayan abun ciki na yau da kullum sai su bayyana ba zato ba tsammani: ɗigo guda wanda ke ƙin canza launi, wani wuri mai walƙiya a wani kusurwa, wata layin duhu mai kusan bayyanawa a cikin gradient shuɗin sama, ko allon fari wanda yake karkata zuwa pink kaɗan. Kayan aikin a Gwajin Launin Allo yana gudana gaba ɗaya a cikin browser, don haka babu wani abu da za a shigar kuma yana aiki iri ɗaya a laptop, monitor na desktop, tablet, ko waya.
Abin da allo na launi cikakke ke bayyanawa
Kowane launi mai tsafta yana matsawa panel ɗin ta wata hanya daban, shi ya sa bin diddigin su duka yake da muhimmanci.
Baƙi shi ne allon da ke duba backlight bleed da contrast. A cikin ɗaki mai duhu, allon mai kyau yana nuna baƙi mai zurfi da daidaici. Idan ka ga girgije masu haske ko layuka masu walƙiya suna shiga daga gefuna da kusurwoyi, wannan shi ne backlight bleed ko IPS glow, inda haske ke fitowa ba daidai ba kewaye da panel. Ɗan hasken kaɗan a kusurwoyi masu kaifi na yau da kullum ne a kan allon IPS; girgije masu girma masu haske da ka gani ko da kai tsaye kake kallo lahani ne.
Fari yana bayyana canjin launi da daidaici. Fari mai tsaka-tsaki ya kamata ya yi kama da haske iri ɗaya daga gefe zuwa gefe. Wani launi mai yellow, pink, ko shuɗi yawanci yana nuna saitin zafin launi (color temperature) na masana'anta maimakon kayan aiki da ya lalace. Yankuna da suka fi duhu ko dumi sosai fiye da tsakiya matsalar daidaici ce.
Ja, kore, da shuɗi su ne allon subpixel. Kowane pixel an yi shi da subpixel na ja, kore, da shuɗi, kuma guda da ya lalace kawai yana bayyana a kan launinsa. Ɗigon da ke duhu a kan allon ja amma lafiya a kan kore da shuɗi shi ne dead red subpixel. Gudanar da dukkansu ukun ita ce hanyar bambanta dead pixel na gaskiya (koyaushe baƙi) daga stuck pixel (koyaushe kunne a launi guda).
Abin da allon gradient ke bayyanawa
Gradient santsi wanda ke tafiya daga duhu zuwa haske shi ne gwajin mafi wuya na zurfin launi. A kan panel mai lafiya na 10-bit ko 8-bit mai dithering mai kyau, canjin yana kama da ci gaba. Idan ka ga matakai ko layuka a bayyane maimakon zuba mai santsi, wannan banding ne. Banding sau da yawa yana zuwa daga saituna maimakon gilashin kansa: panel na 8-bit ba tare da dithering ba, direban GPU da aka saita zuwa iyakataccen kewayon launi ko zurfin bit ƙasa, waya HDMI ko tashar da ba za ta iya ɗauke bandwidth ba, ko matsi mai tsanani. Gradient na grayscale sun fi kyau don gano banding mai laushi da haske mara daidaici, domin idonka ya fi hankali ga canjin sautin launi a cikin launin toka mai tsaka-tsaki.
Yadda za a gudanar da shi daidai
Yanayin yana da muhimmanci kamar gwajin kansa. Ka saka browser cikin fuskar allo cikakke don kada toolbar ko iyakoki su raba hankalinka. Ka duhunta ɗakin, musamman don bincike na baƙi da backlight-bleed, domin hasken kewaye yana ɓoye glow kuma yana ƙara nuna hasken haske. Ka tsaftace allon tukuna, domin ƙura da tabon yatsu suna kama da stuck pixel daidai har sai ka goge su. Ka zauna a nisan kallo na yau da kullum ka kalli kai tsaye, sannan ka koma baya: yawancin pixel "da suka mutu" sun kasance tabo ne kawai, kuma yawancin damuwa na daidaici suna ɓacewa a tazarar hannu. Ka bi ta cikin kowane launi cikakke a hankali, ka bar idanunka su daidaita na daƙiƙa guda, ka bincika daga kusurwa zuwa kusurwa.
Mai kyau da mara kyau: yadda za a fahimci sakamakon
Allo mai kyau yana ba ka baƙi mai zurfi mai daidaici, fari mai tsaka-tsaki ba tare da wani canji a bayyane ba, ja, kore, da shuɗi cikakke ba tare da ɗigon duhu ba, da gradient da ke tafiya ba tare da matakai a bayyane ba. Sakamako mara kyau shi ne ɗigo baƙi da ke tsira ta kowane launi (dead pixel), ɗigo mai launi da ke tsira ta kowane launi (stuck pixel), hasken da ke fitowa daga gefuna wanda ka gani kai tsaye (backlight bleed), manyan yankuna masu dumi ko duhu (rashin daidaici mara kyau), ko layuka masu tauri a cikin gradient (banding).
Lahani na kayan aiki ko saiti kawai?
Wannan ita ce tambayar da gwajin yake nan don amsawa. Dead pixel, stuck pixel, da backlight bleed mai bayyana lahani ne na zahiri a cikin panel kuma ba za a iya gyara su ta hanyar canza software ba; idan monitor sabo ya nuna da yawa daga cikinsu, wannan al'amari ne na warranty. Sabanin haka, canjin launi, ɗan banding, ko fari "mai sanyi sosai" yawanci saiti ne. Ka gwada canza fitowar GPU zuwa full RGB range da zurfin bit mafi girma, ka saita zafin launi na monitor kusa da 6500K, ka canza zuwa waya da aka sani tana da kyau, sannan ka sake gwada allon gradient. Idan banding ya ɓace, matsalar bandwidth ce ko zurfin launi, ba gilashin ba. Don bincike mai zurfi na dead pixel, duba gwajin dead pixel, kuma ka bincika dukkan gwaje-gwajen na'ura don bincike na refresh-rate, taɓawa, da ghosting. Ka tuna iyakar: wannan kayan aikin yana gano matsaloli, amma calibration na gaskiya har yanzu yana buƙatar colorimeter na kayan aiki.
Tambayoyin da ake yawan yi
Menene bambancin dead pixel da stuck pixel?
Dead pixel yana zama baƙi ta kowane launi domin baya karɓar wutar lantarki, yayin da stuck pixel ke ci gaba da kunne a launi guda kamar ja, kore, ko shuɗi. Bin diddigin launuka cikakke yana bambanta su: dead pixel yana duhu a kowane allo, stuck pixel yana duhu a kowane allo sai naka launin sa.
Me ya sa allon farina ke da alama kaɗan yellow ko shuɗi?
Wannan canjin launi ne daga saitin zafin launi na monitor, ba yawanci lahani na kayan aiki ba. Ka saita zafin kusa da 6500K don farin tsaka-tsaki. Idan sashin allon kawai ke da canji yayin da sauran ke lafiya, wannan yana nuna matsalar daidaici maimakon.
Shin backlight bleed na yau da kullum abu ne na yau da kullum?
Ɗan hasken kaɗan a kusurwoyi a kan panel na IPS, wanda ya fi bayyana a kusurwoyi masu kaifi, na yau da kullum ne kuma ana kiran shi IPS glow. Hasken da za ka iya gani kai tsaye a cikin ɗaki mai duhu shi ne backlight bleed na gaskiya kuma yana zama lahani, musamman a kan allon sabo.
Me ya sa nake ganin layuka a cikin allon gradient?
Waɗancan matakan launi ne (banding). Yawanci suna zuwa daga saituna maimakon panel: allo na 8-bit ba tare da dithering ba, GPU da aka saita zuwa iyakataccen kewayo ko zurfin bit ƙasa, ko waya da ba za ta iya ɗauke isasshen bandwidth ba. Ka canza zuwa full RGB range da zurfin bit mafi girma, sannan ka sake gwaji.
Shin wannan gwajin zai iya yin calibration ga monitor ɗina?
A'a. Yana bayyana matsaloli kamar dead pixel, canjin launi, da banding, amma ba zai iya auna ko gyara launuka ba. Calibration daidai yana buƙatar colorimeter na kayan aiki da software na calibration. Gwajin browser don gano lahani da bincika saituna ne kawai.
Shin gwajin yana aiki a wayoyi da tablet?
Eh. Yana gudana a kowane browser na zamani, don haka allon launi cikakke da gradient iri ɗaya suna aiki a wayoyi, tablet, laptop, da monitor na desktop. Yi amfani da fuskar allo cikakke da ɗaki mai duhu don karatu mafi tabbaci a kowace na'ura.