Nyob rau niaj hnub no lub hnub nyoog digital, qhov kev thov rau cov ntxaij vab tshaus thiab kev daws teeb meem siab tau nce ntxiv. Ib qho ntawm feem ntau hom zaub vaj huam sib luag siv nyob rau hauv ntau yam khoom siv hluav taws xob yog Thin-Film Transistor (TFT) colour screen panels. Cov vaj huam sib luag no muab cov duab zoo nkauj nrog cov xim zoo nkauj, ua rau lawv nyiam xaiv rau smartphones, ntsiav tshuaj, TVs, thiab ntau yam ntxiv. Nyob rau hauv tsab xov xwm no, peb yuav delve rau hauv kev faib thiab ua hauj lwm hauv paus ntsiab lus ntawm TFT xim screen panels muab ib tug kev nkag siab ntawm lawv functionality.
TFT xim npo panels tuaj yeem muab faib ua ob hom loj raws li cov cuab yeej siv: Hauv-Plane Hloov (IPS) thiab Twisted Nematic (TN) panels. Ob hom muaj cov yam ntxwv tshwj xeeb thiab ua haujlwm sib txawv, ua rau muaj ntau haiv neeg hauv kev lag luam zaub.
Pib nrog IPS vaj huam sib luag, lawv paub txog lawv cov xim zoo dua qub thiab pom dav dav. Cov thev naus laus zis no siv cov kua siv lead ua kua uas tso cai rau lub teeb kom dhau mus yam tsis muaj kev cuam tshuam, ua rau cov xim raug thiab tiag tiag. IPS panels muab cov xim zoo ib yam tsis hais lub kaum sab xis saib, ua rau lawv yog qhov kev xaiv zoo tshaj plaws rau cov kws yees duab, cov neeg tsim duab kos duab, thiab cov tib neeg nrhiav kev pom zoo.
Ntawm qhov tod tes, TN panels muaj npe nrov rau lawv lub sijhawm teb sai thiab tus nqi pheej yig. Cov tshuab no siv cov kua siv lead ua kua uas sib tw thaum tsis muaj hluav taws xob siv, thaiv lub teeb. Thaum siv hluav taws xob, cov kua siv lead ua kua untwist, tso cai rau lub teeb kom dhau mus thiab tsim cov xim uas xav tau. TN panels feem ntau yog siv rau hauv cov khoom siv nkag teb chaws raws li lawv tau txais txiaj ntsig zoo thiab muab cov xim tsim tawm rau txhua hnub.
Tam sim no, cia peb dhia mus rau hauv txoj hauv kev ua haujlwm ntawm TFT xim npo panels, tsom mus rau IPS thev naus laus zis raws li nws tau txais txiaj ntsig zoo hauv xyoo tas los no. Hauv ib lub vaj huam sib luag IPS, muaj ob peb txheej ua lub luag haujlwm rau kev pom cov duab kom raug thiab muaj zog.
Lub backlight txheej, muab tso rau tom qab ntawm lub vaj huam sib luag, emits dawb lub teeb uas dhau los ntawm ib tug polarizer. Lub polarizer tso cai rau lub teeb oscillating nyob rau hauv ib qho kev taw qhia kom dhau mus, ua rau lub teeb linearly polarized. Lub teeb polarized no ces mus txog thawj iav substrate, tseem hu ua xim lim substrate, uas muaj me me liab, ntsuab, thiab xiav (RGB) xim lim. Txhua sub-pixel sib raug rau ib qho ntawm cov xim tseem ceeb no thiab tso cai rau nws cov xim uas dhau los.
Ua raws li cov xim lim substrate yog cov kua siv lead ua kua txheej, uas yog sandwiched ntawm ob khob substrates. Cov kua siv lead ua kua hauv IPS panels tau ua raws kab rov tav hauv lawv lub xeev ntuj. Qhov thib ob iav substrate, hu ua TFT backplane, muaj nyias-zaj duab xis transistors uas ua raws li cov keyboards rau ib tus neeg pixels. Txhua pixel muaj sub-pixels uas tuaj yeem qhib lossis tawm nyob ntawm seb cov xim xav tau.
Txhawm rau tswj cov kua siv lead ua kua 'kev sib raug zoo, ib qho hluav taws xob yog siv rau cov yeeb yaj kiab nyias nyias. Thaum siv qhov hluav taws xob, cov yeeb yaj kiab nyias nyias ua raws li cov hloov pauv uas tso cai rau tam sim no los ntawm, ua kom cov kua muaju vertically. Nyob rau hauv lub xeev no, lub teeb polarized kis los ntawm cov xim lim yog twisted 90 degrees, tso cai rau nws mus dhau los ntawm ob lub khob substrate. Lub teeb twisted no ces mus txog rau sab saum toj polarizer, dlhos perpendicularly mus rau hauv qab ib tug, uas ua rau kev sib hloov ntawm polarized lub teeb rov qab mus rau nws thawj txoj hauj lwm. Qhov kev hloov pauv no ua rau txoj kev hla ntawm lub teeb, tsim cov xim uas xav tau.
Ib qho ntawm cov txiaj ntsig tseem ceeb ntawm IPS panels yog lawv lub peev xwm los muab cov xim zoo sib xws thiab pom dav dav. Raws li kev sib raug zoo ntawm cov kua siv lead ua kua, IPS vaj huam sib luag tso cai rau lub teeb xa mus sib npaug, ua rau cov xim tsis sib xws thoob plaws tag nrho cov zaub. Tsis tas li ntawd, qhov kev pom dav dav kom ntseeg tau tias cov duab pom nyob hauv qhov tseeb ntawm lawv cov xim qub, txawm tias pom los ntawm ntau qhov kev xav.
Hauv kev xaus, TFT xim npo panels, tshwj xeeb tshaj yog IPS thiab TN thev naus laus zis, tau hloov pauv kev lag luam zaub nrog lawv cov kev pom zoo nkauj thiab ntau yam kev siv. IPS panels ua tau zoo hauv cov xim raug thiab pom dav, ua rau lawv zoo tagnrho rau cov ntawv thov kev tshaj lij. TN panels, ntawm qhov tod tes, muab lub sijhawm teb sai dua thiab cov nqi siv tau zoo, ua raws li cov kev xav tau ntawm cov neeg siv niaj hnub. Los ntawm kev nkag siab txog kev faib tawm thiab kev ua haujlwm ntawm TFT xim npo panels, peb tuaj yeem txaus siab rau qhov tsis sib xws hauv qab cov khoom siv uas tau dhau los ua ib feem tseem ceeb ntawm peb lub neej hauv lub sijhawm digital no.
Post lub sij hawm: Jun-14-2023