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Tshuab thin film transistor kua siv lead ua kua

Jul 03, 2018

Tshuab thin film transistor kua siv lead ua kua


  TFT-LCD qauv. Lub TFT LCD muaj peb lub ntsiab qhov tseem ceeb: cov duab, kev taw qhia thiab kev tsav tsheb.

Lub TFT-LCD zaub suav nrog cov iav substrate, xim lim zaj duab xis thiab cov khoom siv lead ua kua. Kev npaj txheej txheem ntawm iav substrate yog: siv peb daim duab ntawm daim npog ntsej muag, thawj daim duab ntawm ITO zaj duab xis ntawm iav substrate (thickness 20 mus 50N m) thiab Cr film (thickness 50 mus rau 100nm), thiab photolithography, lub thawv ntim ntawm daim phov ntsa Si: (tuab txog 400N m), thiab tom qab ntawd ces eigena-si (tuab 50 ~ 100N m) thiab N + Si ib txheej, thiab photolithography graphics (Qhuav deposition) Al film, photolithography ntws los ntawm electrode, thiab thaum kawg ntws los ntawm lub npoo hluav taws xob li lub npog ntsej muag, nws tus kheej los ntawm cov yeeb yaj duab Cr ntawm pixel electrode thiab TFT qhov chaw ntub dej ntawm N + a-Si zaj duab xis. Qhov no yog qhov yooj yim tsim ntawm TFT anti interlacing qauv. Cov kauj ruam tom ntej yog kom muaj txheej txheem txheej rau hauv cov iav substrate, thiab txhuam rau ib qho kev taw qhia nrog lub flannelette kom cov nplais ntawm cov qauv txheej zoo rau ib qho kev nplua nrog cov kev taw qhia thiab tswj cov kev coj ua ntawm cov kua siv lead ua kua molecules . Nyob rau hauv lub zwj ceeb hais tias kev coj ntawm lub trough zawj nyob rau hauv ob lub iav substrate yog orthogonal, lub ob iav substrates raug khi thiab


Cov xim lim xim (xim Lim) hu ua CF rau luv luv. Xim cov duab ntawm TFT-LCD tau ua kom pom tseeb ntawm xim zaj duab xis los ntawm lub teeb ntawm lub array substrate, thiab cov xim yuav tshwm rau ntawm lub vijtsam zaub. Cov xim lim xim (raws li cov ntawv pleev xim me me) tuaj yeem ua rau saum lub pob tshab electrode (nruab nrab ntawm lub pob tshab electrode thiab cov kua siv lead ua kua), los yog hauv qab cov electrode (nruab nrab ntawm lub pob tshab electrode thiab iav). Lub sab nrauv thiab qis iav substrates muaj tseeb nyob rau hauv cov ntawv sib tw nrog CF zaj duab xis, thiab CF zaj duab xis dub dawb matrix yog raws nraim mus rau ntawm ntug ntawm ITO pixel electrode. Lub CF zaj duab xis txuas mus rau ntawm cov kua qaub cell ua kua thiab tom qab ntawd clamped rau hauv cov kua siv kua qaub cell los ntawm ob lub yeeb nkab xim tsis muaj roj polarizing. Cov hauv paus ntsiab lus ntawm cov xim muaj peev xwm muab piav qhia raws li: cais qhov pixel ntawm TFT-LCD hauv liab, ntsuab, xiav (R, G, B) peb cov xim yooj yim, thiab sib nug xov mus rau RGB CF zaj duab xis, LCD rau txoj haujlwm ntawm cov lub teeb taws kom sib npaug thiab muab cov xim kom haum los ntawm tus qauv xim ntawm CF daim nyias nyias. Yog tias qhov teebmeem pom dhau ntawm CF zaj duab xis tsis tuaj lawm, nws yuav cuam tshuam qhov sib npaug ntawm TFT-LCD, ces dub dub (Dub Matrix) yuav tsum tau teem rau hauv qhov sib txawv forshort.

Rau kev ruaj ntseg thiab smoothness, kev tiv thaiv txheej txheem (OE COTA) ntawm 0.5 mus rau 2 m tuab yog ua los ntawm cov tshuaj OC thiab propylene thiab epoxy cob. Tom qab ntawd ib qho sib lub electrode yog tsim nyob rau hauv kev tiv thaiv txheej, uas yog, hluav taws xob electrode zaj duab xis. Qib BM feem ntau yog ua los ntawm cov hlau chromium (Cr). Yuav kom txo tau qhov saum npoo av, chromium oxide (CrOx) los sis siv los kuj siv. Lub thickness ntawm cov hlau chromium yog li 1000 ~ 1500, uas muaj xim nrog resin, dyestuff lossis pigment li xim txheej. Cov duab xim ntawm txhua lub ntsiab lus pixel txawv vim yog siv TFT-LCD. Xws li bar, mosaic, daim duab peb sab thiab hais txog. Cov cwj pwm ntawm CF zaj duab xis yog hais txog kev hloov pauv, xim purity, zoo ib yam thiab tsis txaus siab, yog li cov kev cai ntawm CF zaj yeeb yaj kiab yog kev xa tawm siab thiab xim purity, siab zoo thiab thaj yeeb nyab xeeb, thiab tsis tshua pom kev tsis tshua pom.

Cov kua siv lead ua kua. Raws li tsis tiav cov txheeb cais, muaj ntau tshaj li 10 txhiab hom polymer compounds uas siv tau ua kua khoom siv ua kua. Cov khoom siv lead ua kua yog feem ntau nyuaj ua kom tau raws li qhov yuav tsum tau muaj ntawm qhov kub thiab txias, elastic coefficient, dielectric qhov tob, refractive index anisotropy thiab viscosity thiab lwm yam kev qhia loj. Lub cev nqaij daim tawv yuav tsum tau hloov los ntawm cov kua siv lead ua mixed. Feem ntau siv cov khoom siv lead ua kua tau raug faib ua peb pawg raws li cov kev taw qhia txog kev sib xyaw cov ntsiab lus ntawm molecular: ib qho yog kua qaub ua kua. Cov kua siv lead ua kua no yog qhov uas tig mus rau qhov ntev ntawm cov xaim hluav taws xob. Dhau li ntawm tig thiab zawv zawg, lwg me me tuaj yeem txav mus qis. Ob tug yog cov kua siv ua kua roj cholesteric. Cov khoom siv ua kua ua kua no, lub molecule yog cov qauv ntawm cov dav hlau sib txawv, nyob rau tib lub dav hlau, lub plhom molecular yog qhov uas tig mus rau kev ncaj qha vector ntawm txhua lub dav hlau, thiab qhov sib tw ntawm txheej los ntawm txheej yog hloov tau; peb yog cov txheej txheem ze kua dej ua kua. Cov khoom siv lead ua kua yog tsim kom haum, thiab cov axis molecular ntawm txhua txheej yog sib luag rau ib leeg, thiab tuaj yeem txav mus rau ib leeg. Txawm li cas los xij, molecules tsis tuaj yeem xaub dawb ntawm cov khaubncaws sab nraud povtseg. Cov khoom siv tseem ceeb ntawm cov khoom siv lead ua kua yog: qauv ntev molecular, ntsug thiab thaum uas tig mus ob qho kev qhia hauv kev coj ua ntawm qhov kev ncaj ncees, qhov hluav taws xob, qhov dielectric qhov chaw thiab qhov kev ntsuas qis rau txhua yam sib txawv, thiab hloov nrog rau sab nraud cov neeg mob xws li kub thiab tsav tsheb ntau zaus. Tsis tas li ntawd, qhov kev ntsuas ntawm lub cev muaj zog anisotropy yog loj, thiab kua siv kua qaub cell yuav ua tau thinned thaum tib lub cim kho qhov muag tau tsim. Qhov kev siv hluav taws xob hauv qhov hluav taws xob tib lub zog yuav ua kom qhov ceev ceev ntawm cov kua siv kua qaub.


TFT-LCD backlight. Cov kua siv ua kua nws tsis ua lub teeb, thiab sab nrauv yuav tsum muaj ntaub ntawv. Qhov lub teeb ci sab nraud sab nraud yog hu ua backlight. LCD teeb pom kev zoo, raws li txoj hauj lwm ntawm LCD qhov chaw thiab lub teeb qhov chaw, yuav tsum muab faib ua peb hom: hom ntug, hom ncaj thiab hom luminous. Cov teeb roj teeb thiab cov roj teeb uas muaj teeb meem dawb yog cov khoom taw, cov roj teeb (kub cathode thiab txias cathode) yog cov kab uas muaj lub teeb ci, electroluminescent (EL) thiab cov duab ci-dias diodes yog cov teeb ci sab nrauv. Lub dav hom teeb ci ntsaib yog lub teeb pom kev zoo ntawm sab nraud ntawm lub cheeb tsam thiab qhov sib dhos ntawm lub teeb ci. Yuav kom muaj kev sib luag ntawm lub cheeb tsam ntawm lub teeb pom kev zoo, qhov kev ntaus keeb kwm ntawm ntug kev yog siv lub teeb sib sau thiab lub teeb rau kev pom kev. Yuav kom ua rau qhov teeb meem tshwm sim ntawm ib sab, lub teeb pom los ntawm lub teeb uas tawm hauv lub collector ua kom nws lub dav hlau qhov kaj. Qhov ncaj nram backlight yog nruab nrog 1 los yog ob peb lub teeb cathode nyob rau hauv qab ntawm cheeb tsam cov zaub, nrog lub diav tawg ntub rau ntawm lub teeb cathode kom tshem tawm cov kab mob khaub thuas cathode. Lub luminous qhov nrig qis yog nyob rau hauv cheeb tsam cov duab, thiab pawg vaj huam sib luag electroluminescent. Electroluminescence yog ib qho hluav taws xob emitting, uas tuaj yeem muab faib tawm ncaj qha uas tsis muaj cov pob. Lub luminous xim yog xim ntsuab, xiav thiab dawb, thiab qhov ci ntsa iab yog 30 ~ 100 nite. Txoj kev loj hlob ntawm TFT-LCD backlight yog: daim duab loj loj, ci ntsa iab, dav saib dav thiab nyias nyias, hnyav, tsawg zog thiab tsawg dua.


TFT-LCD tsav Circuit Court . Yuav kom tso saib txhua cov duab, TFT-LCD yog tso tawm kom pom los ntawm hnyav thaij sab nraud npaj siab los ntawm m * n cov ntsiab lus. Thaum tsim daim phiaj Circuit Court, peb yuav tsum xub xav tias kua crystal electrolysis yuav ua rau cov kua siv lead ua kua tsis zoo, thiab kom paub meej tias lub neej kev cia siab, peb feem ntau siv AC tsav hom. Cov kev tsav tsheb tau xaiv tau: qhov xaiv qhov kev xaiv, qhov nruab nrab kem, hom DAC thiab simulation hom. Vim tias TFT-LCD yog siv rau hauv cov computers, cov tsav hluav taws xob muab faib rau cov teeb liab ntawm lub xov tooj, lub hwj huam xa hluav taws xob, grey voltage Circuit Court, cov qauv hluav taws xob khiav hluav taws xob, cov ntaub ntawv kab tsheb khiav thiab cov xov tooj ntawm cov chaw nyob tau tsav. Lub ntsiab lus tseem ceeb ntawm kev tsav tsheb khiav yog tias qhov teeb meem tswj kev teeb tsa khoom siv hluav taws xob, lub teeb liab thiab lub sijhawm teeb liab rau cov IC, thiab cov khoom siv lub teeb liab tswj thiab lub sijhawm teeb liab rau lub rooj vag tsav IC; qhov fais fab mov Circuit Court yuav muab lub hwj huam mov voltage rau cov IC thiab lub rooj vag tsav IC; lub voj voog voltage grey yuav ua kom muaj 10 tus ntawm daim phiaj tsav digital. Txhua cov grayscale voltages muab cov ntaub ntawv tsav; qhov hluav taws xob hluav taws xob hluav taws xob (Circuit Court Circuit Circuit) siv cov khoom siv hluav taws xob (common voltage) rau qhov sib pauv hluav taws xob sib txuas rau pixel electrode; cov ntaub ntawv kab drive circuit qhia cov ntaub ntawv thiab lub cim pib ntawm lub 6 khoom ntawm lub RGB teeb liab uas xa los ntawm lub teeb liab lub vojvoog, thiab cov sij hawm poob raws li xauv thiab txuas ntxiv mus rau sab hauv, ces cov ntaub ntawv tso tawm yog 6 feem.

Lub DA hloov tshwj xeeb yog hloov mus rau hauv ib lub teeb liab analog, tom qab ntawd cov hluav taws xob tso tawm yog hloov mus ua ib qho impedance muab cov ntaub ntawv kab ntawm cov npo LCD; lub rooj vag tsav tsheb hloov tsheb ntawm lub teeb liab lub suab xa los ntawm lub teeb liab lub vojvoog, hloov cov txav los ntawm kev ua haujlwm npe, kauj voj vojvoog rau ON / OFF voltage, thiab ntxiv rau cov npo LCD. Thaum kawg, tus tsav hluav taws xob tau sib sau ua ke ntawm TAB (kev siv lub voj voog yooj yim), thiab ACF (anisotropic conductive adhesive film) thiab cov TCP (tsav lub voj voog uas yooj ywm) yog txuas nrog cov kua siv lead ua kua.


TFT-LCD ua haujlwm txoj cai. Ua ntej tshaj plaws, nws qhia txog lub hauv paus ntsiab lus. Lub hauv paus ntsiab lus ntawm cov kua siv lead ua kua yog raws li cov yam ntxwv ntawm cov kua siv lead ua kua hloov hloov nrog cov lus siv hluav taws xob. Thaum lub teeb dhau ntawm lub ncov qaumteb, nws yuav ua kom pom qhov kaj. Cov kev coj ntawm kev coj raws cai yog raws li cov kev coj ntawm kev sib cav ntawm lub ncov qaum, uas yog raws li qhov kev txiav txim ntawm cov kua siv lead ua kua molecules rau sab saud thiab qis iav substrates.

Thaum lub teeb kis tau los ntawm cov kua siv lead ua kua, cov duab ntxoo (linearly polarized light) yog muab tso rau hauv ob kab teeb meem vim hais tias ntawm lub zog ntawm cov kua siv lead ua kua. Vim hais tias qhov kev qhia tawm ntawm ob kab kab no txawv (qhov tib theem), thaum ob kab teeb meem sib txuas, qhov kev taw qhia ntawm qhov kev vibration yuav hloov. Los ntawm lub teeb ntawm cov kua siv lead ua kua, nws yog maj mam distorted. Thaum lub teeb ncav lub phaj polarizing, nws qhov muag axis kho qhov muag yog distorted 90 degrees, thiab yog raws nraim nrog lub siab kev siab ntawm qis polarizer. Nyob rau hauv no txoj kev, lub teeb tsim ib lub tiaj ci los ntawm qis ncov qaum. Thaum cov pa hluav taws siv, cov kua siv lead ua kua yog taw, cuam tshuam thiab vanished nyob rau hauv qhov kev txiav txim ntawm hluav taws xob. Nyob rau lub sij hawm no, lub teeb ncov ntawm lub ncov ntawm lub ncov qaum cov duab tsis muaj zog nyob hauv cov kua siv ua kua, thiab tsis tuaj yeem hla dhau qhov tsawg dua.