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TFT-LCD Technology

TFT-LCD Technology

Mar 22, 2017

TFT-LCD technology, ncauj lus kom ntxaws txheej txheem

Ua hauj lwm hauv paus ntsiab lus ntawm TFT-LCD kua siv lead ua zaub

Nyob rau hauv nyias zaj duab xis transistor kua siv lead ua zaub (TFT-LCD), cov kev ua ntawm TFT yog ib tug mus raj. TFT yog kheev siv nyob rau hauv peb davhlau ya nyob twg kiag li lawm. Ib tug semiconductor txheej yog tsim nyob rau hauv ib lub khob substrate, thiab ib qhov chaw electrode thiab ib tug ntws electrode yog kev cob cog rua ntawm ob hnub. Thiab los ntawm lub rooj vag insulating zaj duab xis opposite lub semiconductor, lub voltage thov rau lub rooj vag mus tswj lub hauv paus thiab ntws ntawm qhov tam sim no.

Rau cov zaub screen, txhua pixel yuav tau saib raws li ib tug kua siv lead ua los ntawm cov pixel electrode thiab cov electrode. Yuav ua li cas yog tseem ceeb yog hais tias nws yuav tsum tau saib raws li ib tug capacitor los ntawm tus taw tes ntawm view ntawm hluav taws xob. Lub sib npaug Circuit Court yog qhia nyob rau hauv daim duab 1. j kab kuv kem pixel P (I, J) xwb, nws yog tsim nyog los tig rau tus tes hloov qhov T (I, J) nyob rau hauv lub teeb liab kab D (I) mus thov lub hom phiaj voltage . Thaum lub pixel electrode yog siab them, txawm yog hais tias tus tes hloov qhov yog tawm, tus nqi nyob rau hauv lub capacitor yog fwm. Cov nuj nqi ntawm cov ntaub ntawv (sab) neeg tsav tsheb yog mus thov lub hom phiaj voltage mus rau lub teeb liab kab, thiab lub rooj vag (kab) neeg tsav tsheb ua raws li tus tes hloov qhov hauv thiab tawm. Vim hais tias cov voltage ntxiv rau cov kua siv lead ua txheej yuav tsum tau muab cia, cov kua siv lead ua txheej yuav ua hauj lwm stably. Qhov no zaub voltage kuj yuav rov sau nyob rau hauv ib tug luv luv lub sij hawm ntawm lub sij hawm los ntawm lub TFT, yog li ntawd, txawm rau siab txhais LCD, kuj tau raws li cov duab zoo uas yuav tsum tau.

Tus yuam sij rau tso saib cov duab no kuj yog molecular orientation ntawm cov kua siv lead ua nyob rau hauv lub hluav taws xob field. Los ntawm cov kawm tuab si lug ntawm lub sab hauv ntawm lub substrate, lub kua siv lead ua molecules cov txheej txheem los mus tsim cov kev kawm deformation kom paub sib txawv zaub hom. Nyob rau hauv qhov kev txiav txim ntawm lub fais teb, lub kua siv lead ua qauv muaj ib tug kev hloov ntawm orientation, thiab cov kev siv ntawm qhov teeb meem teeb hloov los ntawm cov kua siv lead ua txheej los ntawm qhov kev koom tes ntawm cov polarizer. Nyob rau hauv thiaj li yuav ua tau duab zaub.

Tej yam yooj yim matrix nyias zaj duab xis transistor kua siv lead ua zaub nrog passive TN-LCD thiab STN-LCD yog sib txawv, nws muaj ib tug nyias zaj duab xis transistor nyob rau hauv txhua pixel ntawm cov kua siv lead ua zaub (TFT), uas muaj peev xwm zoo kov yeej lub crosstalk tsis gating, uas muaj peev xwm tso saib zoo li qub yam ntxwv thiab tshuaj ntaus kab LCD screen yog ywj siab ntawm tus xov tooj, yog li zoo heev rau kev txhim kho cov duab zoo. Lub switching unit (ie TFT) yam ntxwv, nws yog tsim nyog kom tau raws li qhov uas tsis muaj nyob rau hauv lub xeev kuj, kaw lub xeev kuj yog heev loj no yuav tsum tau.

Cov xim zaub ntawm nyias zaj duab xis transistor kua siv lead ua zaub yog pom tau hais los ntawm kev ntxiv ib txheej ntawm cov xim lim nyob rau hauv pem hauv ntej vaj huam sib luag ntawm cov zaub. Nws yuav tsum tau zus tau tej cov liab, ntsuab, xiav thiab dub matrix rau txhua pixel.

Lub ntsiab zoo ntawm TFT-LCD LCD

Nrog rau qhov kev loj hlob ntawm TFT technology nyob rau hauv thaum ntxov 90s, txoj kev loj hlob ntawm cov xim LCD tiaj vaj huam sib luag zaub, tsawg tshaj li 10 xyoo, lub loj hlob sai ntawm TFT-LCD mus rau hauv lub mainstream zaub, uas nws muaj nws zoo yog inseparable. Main nta yog:

(1) zoo siv cov yam ntxwv

Daim ntawv thov ntawm cov uas tsis muaj voltage, tsis tshua muaj tsav tsheb voltage, khoom siv kev ruaj ntseg thiab kev cia siab yog paub; ca, thiab nyias, tsuas yog ib tug ntau ntawm raw cov ntaub ntawv thiab cov kev siv ntawm qhov chaw; uas tsis muaj zog noj, lub hwj chim noj yog hais txog CRT zaub 1/10, sab laug thiab txoj cai ib feem pua paab TFT-LCD xwb txawm CRT, cawm ib tug ntau ntawm lub zog thiab TFT-LCD khoom; specification, loj series, ntau yam, saj zawg zog thiab yooj yim rau siv, txij nkawm, update, ib qho yooj yim yuav tau upgrade, ntev kev pab cuam lub neej thiab ntau lwm nta. Zaub ntau los ntawm 1 nti rau 40 nti tso saib tag nrho daim ntawv thov ntau yam thiab loj projection dav hlau yog tag nrho cov loj zaub davhlau ya nyob twg; zaub zoo los ntawm lub feem ntau yooj yim monochromatic cim graphics rau siab daws teeb meem, siab xim fidelity, siab brightness, siab zoo, siab teb kev ceev ntawm lub video zaub los ntawm ntau yam specifications; zaub muaj ib tug ncaj qha hom projection hom, foundations, kuj thiaj hom.

(2) zoo ib puag ncig tiv thaiv

Tsis tawg, tsis muaj flicker, tsis muaj kev tsim txom rau hauv lub noj qab haus huv ntawm cov neeg siv. Nyob rau hauv kev, lub rov tshwm sim ntawm TFT-LCD hluav taws xob cov phau ntawv, yuav coj tus tib neeg paperless chaw ua hauj lwm, paperless printing era, ua rau tib neeg txoj kev kawm, kev sib txuas lus thiab cov ntaub ntawv ntawm kev vam meej kiv puag ncig.

(3) wide Scope ntawm daim ntawv thov

Nws yuav siv tau txhua zaus nyob rau hauv lub kub ntau los ntawm -20 DEG C rau +50 DEG C, thiab cov ua hauj lwm kub ntawm TFT-LCD yuav txo tau kom 80 degrees hauv qab no zero. Cov nqi hluav taws xob qauv tsis tsuas muaj peev xwm yuav siv tau raws li ib tug mobile davhlau ya nyob twg zaub, tab sis kuj muaj peev xwm siv tau raws li ib tug loj screen projection tv.

(4) ib tug high degree ntawm automation nyob rau hauv raug technology

Loj scale muaj ntau lawm yam ntxwv. TFT-LCD kev lag luam mature technology, loj-scale zus tau tej cov khoom tiav nqi ntawm 90% los yog ntau tshaj.

(5) TFT-LCD yog ib qho yooj yim mus rau integrate thiab hloov tshiab

Nws yog ib lub zoo meej ua ke nrog cov loj scale semiconductor kev Circuit Court technology thiab lub teeb qhov chaw technology. Tam sim no, muaj amorphous, polycrystalline thiab monocrystalline silicon TFT-LCD, yuav muaj lwm yam ntaub ntawv nyob rau hauv lub neej yav tom ntej TFT, ob lub iav substrate thiab yas substrate.

TFT-LCD tsim txoj kev

Nyias zaj duab xis transistor kua siv lead ua zaub (TFT-LCD) yog feem ntau ua nyob rau hauv thaum uas tig mus nrog ob tug ua dab, raws li qhia nyob rau hauv daim duab 1. Lub hauv paus txheej txheem yog raws li nram no:

Cov xim lim txheej los ntawm pem hauv ntej iav substrate, xim lim substrate / txheej txheem daim ntawv leej arrangement.

Cov tsim ntawm nyias zaj duab xis transistor kua siv lead ua nyias zaj duab xis - Substrate Technology (TFT) thiab lwm yam electronic Cheebtsam siv nyob rau hauv zaub pixel array tswj. Txhua pixel feem ntau sau raws nkaus Ii peb nyias zaj duab xis transistor kua siv lead ua (TFT), txhua pixel kom tswj tau ib qho roos ib tug pixel ntawm cov xim point ". Tus zaj duab xis txoj kev txheej txheem siv CVD, kos thiab PVD technology, uas yog zoo li semiconductor raug technology. Qhov no txoj kev yuav tsum tau rov qab ob peb lub sij hawm, tas mus li zaj duab xis tau tsim ib haumxeeb caij (daim duab 2).

Lub ob substrates nrab txhaj kua siv lead ua cov ntaub ntawv uas yuav ua ib tug.

Qhov kawg los ua ke thiab backlight tsav tsheb hluav taws xob lub Cheebtsam, raug TFT-LCD module.

TFT-LCD LCD technology

Cov tsim txoj kev ntawm nyias zaj duab xis transistor kua siv lead ua zaub muaj cov nram qab qhov chaw: TFT array yog tsim nyob rau hauv lub TFT substrate; txoj kev ua ib xim lim qauv thiab Ito conductive txheej ntawm cov xim lim substrate; nrog ob tug substrates tsim tau ib cov kua siv lead ua box installation; peripheral Circuit Court, backlight module los ua ke los ua ke.

1. txheej txheem rau txoj kev TFT array rau TFT substrate

TFT tau pom tau hais cov Industrialization ntawm lub hom xws li: amorphous silicon TFT (a-Si TFT), polycrystalline silicon TFT (p-Si TFT), monocrystalline silicon TFT (c-Si) ob peb. Tam sim no tus feem ntau lug siv yog ib tug-Si TFT.

Lub fabrication txheej txheem ntawm ib-Si TFT yog thawj pos pa lub rooj vag cov ntaub ntawv uas zaj duab xis nyob rau hauv lub borosilicate iav substrate, thiab ces rau daim phiaj qauv tom qab lub npog ncauj raug, txoj kev loj hlob thiab lub qhuav etching. Kauj ruam raug tshuab rau kev npog qhov ncauj raug. Cov kauj ruam thib ob yog siv PECVD txoj kev nruam zaj duab xis tsim kom muaj, SiNx zaj duab xis, uas tsis yog doped ib-Si zaj duab xis, phosphorus doped n + ib-Si zaj duab xis. Tom qab ntawd, ib tug-Si qauv ntawm lub TFT ib feem yog tsim los ntawm daim npog qhov ncauj raug thiab qhuav etching. Qhov thib peb kauj ruam yog tsim tau ib cov pob tshab electrode (Ito zaj duab xis) los ntawm sputtering, thiab ces mus rau tso saib lub electrode qauv los ntawm daim npog qhov ncauj raug thiab ntub dej etching. Cov hu qhov qauv ntawm lub plaub kauj ruam rooj vag huab rwb thaiv tsev zaj duab xis yog tsim los ntawm daim npog qhov ncauj raug thiab qhuav etching txoj kev. Lub tsib kauj ruam yog pos pa AL rau hauv cov zaj duab xis, nrog daim npog qhov ncauj raug, etching qhov, ntws thiab teeb liab kab qauv ntawm TFT. Thaum kawg, tus tiv thaiv zaj duab xis yog tsim los ntawm PECVD txoj kev, thiab ces tus zaj duab xis yog etched los ntawm daim npog qhov ncauj raug thiab qhuav etching. Cov kev tiv thaiv zaj duab xis yog siv los tiv thaiv lub electrode thiab lub electrode thiab cov zaub electrode. Yog li ntawd, nyob deb, rau tag nrho cov txheej txheem tiav.

TFT array technology yog tus yuam sij ntawm TFT-LCD tsim txoj kev, thiab feem ntau yog ib feem ntawm cov khoom peev. Tag nrho cov txheej txheem yuav tsum tau ib theem siab ntawm purification (eg, theem 10).

2. txheej txheem rau txoj kev ua ib tug xim lim qauv rau ib tug xim lim (CF) substrate

Cov kev rau txoj kev ua lub kob yog ib feem ntawm cov xim lim comprises ib qob txoj kev, ib tug xim dispersion txoj kev, lub tshuab luam ntawv txoj kev, ib tug electrolytic deposition txoj kev thiab ib tug number case-dav hlau txoj kev. Tam sim no, cov xim dispersion txoj kev.

Thawj kauj ruam ntawm cov xim dispersion txoj kev yog mus disperse lub zoo hais (nruab nrab particle loj tsawg tshaj li 0.1 M) (R, G, B tricolor) nyob rau hauv lub pob tshab photosensitive cob. Ces lawv tau coated nrog R., G. thiab B xim qauv nyob rau hauv thiaj li yuav loj, raug thiab tsim. Tus ntaus ntawv yog tsuas yog siv rau txheej, raug thiab tsim.

Nyob rau hauv thiaj li yuav tiv thaiv kom txhob lub teeb to, feem ntau yog nrog ib tug dub matrix ntawm lub hlws ris ntawm peb RGB (BM). Nyob rau hauv lub dhau los lawm, rau ib leeg txheej hlau chromium zaj duab xis tau tsim los ntawm sputtering txoj kev, thiab tam sim no muaj ib tug tshiab hom ntawm BM zaj duab xis los yog cob mixed carbon cob BM.

Nyob rau hauv tas li ntawd, nws yog tsim nyog los ua ib tug txheej ntawm kev tiv thaiv zaj duab xis nyob rau hauv lub BM thiab rau IT0 electrode, vim hais tias cov substrate nrog rau xim lim yog siv raws li ib tug pem hauv ntej substrate ntawm cov kua siv lead ua screen thiab ib tug rear phaj nrog TFT tsim tau ib cov kua siv lead ua box. Yog li ntawd, peb yuav tsum xyuam xim rau cov teeb meem ntawm kev ntseeg, yog li ntawd txhua unit ntawm cov xim lim thiab cov coj pixels ntawm tus TFT substrate.

3. kua siv lead ua box npaj cov txheej txheem

Firstly, lub polyimide zaj duab xis yog loj rau ntawm qhov chaw ntawm lub sab sauv substrate thiab lub qis substrate ntsig txog, thiab ib tug orientation zaj duab xis peev xwm yuav tsim raws li qhov uas yuav tsum los ntawm lub tsis sib haum xeeb txheej txheem. Tom qab ntawd, sealant khoom yog teem ib ncig ntawm lub TFT array substrate. Nyob rau tib lub sij hawm, cov nyiaj muab tshuaj txhuam yog loj rau lub pob tshab electrode ntawm lub CF substrate. Tom qab ntawd, ob tug substrates yog mus raws li thiab sib raug zoo, thiaj li hais tias cov CF qauv yog mus raws li nrog lub TFT pixel qauv. Nyob rau hauv lub printing sealing cov ntaub ntawv uas, yuav tsum tau tawm txhaj tshuaj chaw nres nkoj, nyob rau hauv thiaj li yuav nqus tsev Txoj kev lis ntshav kua siv lead ua.

Nyob rau hauv xyoo tsis ntev los, nrog rau qhov kev kawm ntawm technology thiab cov kev nce ntawm substrate loj, nyob rau hauv lub tsim txoj kev ntawm lub thawv kuj tau paub heev, ntau tus neeg sawv cev yog sau tus siv lead ua style hloov, los ntawm tus thawj rau hauv ib lub thawv tom qab perfusion mus rau lub ODF txoj kev, namely sau siv lead ua thiab ib txhij mus rau hauv ib lub thawv. Nyob rau hauv tas li ntawd, cov ntaub qhwv to hauv ob sab phlu txoj kev yog tsis cov tsoos txoj kev txau, tab sis ncaj qha rau ntawm lub array siv photolithography.

4. peripheral Circuit Court, los ua ke backlight module los ua ke txheej txheem

Tom qab ntau lawm txoj lub kua siv lead ua box yog ua kom tiav, ib tug peripheral tsav tsheb Circuit Court yuav tsum tau yuav tsum tau npaj rau lub vaj huam sib luag, thiab ces tus polarizing phaj yog Document rau ntawm qhov chaw ntawm lub ob substrates. Yog hais tias cov kis hom LCD. kuj nruab backlight.

Tshwj xeeb raws li nram no:

Array txheej txheem (array txheej txheem)

Tiag tiag tsob nroj ntau lawm txheej txheem:

Cov txheej txheem yog muab faib ua ob qhov chaw, CF thiab TFT, raws li qhia nyob rau hauv daim duab:

TFT-LCD kev lawm txheej txheem

Ib tug, TFT array substrate tsim theem

TFT array lub ntsiab tu txheej txheem, zaj duab xis, thiab daj lub teeb system board, tom qab lub etching txheej txheem los mus tsim ib tug qauv, thiab ces raws li tus xov tooj ntawm daim npog qhov ncauj kev txheej txheem, nyob rau hauv no voj voog txheej txheem yuav tsum xub muab ntxuav rau hauv lub khob substrate pos pa plating ib tug txheej ntawm cov hlau, thiab ces tus daj lub teeb thiab etching txheej txheem rau txoj kev ua rooj vag, regional txawv, sui tom qab stripping photoresist iav substrate los ntawm tu, rau zaj duab xis cheeb tsam ntawm ntshav pab cov pa tshuaj deposition txoj kev tshuab ua hauj lwm pab raws li lub active cheeb tsam, los ntawm ib tug series ntawm lub regional kev sib koom tes. TFT tiv thaiv txheej tsim nyob rau hauv nyias zaj duab xis cheeb tsam tom qab cov pa tshuaj deposition ntawm Yang Tai, ces khawb lub qhov, ces sputtering ib tug txheej ntawm indium tin oxide zaj duab xis (Ito), thiab lub teeb daj thiab etching txheej txheem rau txoj kev pixel cheeb tsam nyob rau hauv cov cheeb tsam no qauv kev txheej txheem tom qab TFT etching txheej txheem rau cov ntsiab kauj ruam.

Raws li cov qauv ntawm cov TFT rooj vag, qhov chaw, ntws electrode deposition ib theem zuj zus, yuav roughly muab faib ua plaub pawg, raws li qhia nyob rau hauv daim duab TFT, yog tam sim no tawm los yog mus rov qab rau stacked qauv, vim hais tias nws muaj qhov zoo ntawm tej yam yooj yim qauv thiab yooj yim fabrication yog dav siv los ntawm lub chaw tsim tshuaj paus TFT, vim hais tias cov txheej txheem sib txawv Channel: 1) tom qab lub etching ntawm TFT 2) tom qab ceev TFT los yog hu ua ntau lawm txheej txheem tseem ceeb kauj ruam peb txheej qauv ntawm TFT.TFT yog N tom qab etching channel thaum xaus ntawm amorphous silicon . Nyob rau hauv thiaj li yuav tsim ib tug lub rooj vag tswj channel, uas yog feem ntau ib tug qhuav etching txoj kev, thiab qhov ua rau ntawm lub to tam sim no tej zaum yuav nyob rau hauv lub qhuav rau lub channel thaum ib qho yooj yim mus ua qhov teeb meem tawm ntawm tus mos lwj residue.

Ob tug, tus tsim theem ntawm TFT-LCD

Ua kom tiav tag nrho cov dab nyob rau hauv lub TFT-LCD iav, muaj ib cov tshuab nrog liab, ntsuab thiab xim xiav lim iav, thawj kawm tuab si lug zaj duab xis txhuam, kawm tuab si lug kev kho mob, txheej lub tog raj thiab ncej kua nplaum thiab ob daim iav rau tus tom ntej pab pawg neeg, tej lub lobes ntug sib tsoo thiab chamfering, tu ces, kua siv lead ua txhaj tshuaj thiab kev sib khi, thiab thaum kawg soj ntsuam thiab hluav taws xob xeem, yog ib lub tseem ceeb tshaj plaws cov kauj ruam no muaj raws li nram no:

1.alignment kev kho mob

Tag nrho cov txheej txheem yog txhuam hniav sib tsoo ua, mas nyob rau hauv volume franella txhuam hlau chais sib tsoo tom qab tua cov kawm tuab si lug zaj duab xis, kua siv lead ua molecules yuav nam ntawm ib tug tej yam kev taw qhia.

2, .Tus kis ntawm lub tog raj

Lub hom phiaj yog kom tau ib tug uniform thickness ntawm cov kua siv lead ua, nws dispersed kev kub ceev yuav ua tau ntau yam CELL GAP, yog hais tias muaj yog to thaum lub tog raj yuav txo qhov zoo thiab txo cov degree ntawm lub tog raj dispersion tsis tau txawm CELL GAP, tseem yuav muaj feem xyuam rau qhov zoo. Yog li ntawd, lub tog raj tusyees txau tseem ceeb heev, tam sim no uas muaj hom kis txoj kev yog yooj yim los mus tswj cov kev ceev, yog tus thawj mus li cas nrog lub tog raj, quasi khoom ua ke rau cov roj hmab ncej yuav tsum tau nqa tawm tom qab lub CF thiab TFT.

3, .panel tej

Nrog TFT thiab mob CF lub cev ua ke nrog quasi kaw super hard steel menyuam tej thiab fracturing txoj kev uas yuav tau txais txhua txhua daim ntawm vaj huam sib luag.

Tom qab lub sui ntawm zoo, loj thiab zoo ntawm lub vos ncej module, txoj kev loj hlob ntawm nyias, ultra nyuaj steel yuav tsis tau raws li cov kev cai tom qab lub kho kom zoo nkauj, laser txiav txoj kev.

4, .liquid siv lead ua txhaj

Kuv yuav siv iav ncej tas rau lub tshuab, kua siv lead ua txhaj ncaj hom kua siv lead ua txhaj txoj kev, yuav tsum tau them nyiaj mloog kom tsis txhob tog raj thiab tawg lub tog raj) ua ke.

II thawj qhia rau cov CELL nrog lub tshuab nqus tsev, lub CELL kua siv lead ua txhaj chaw nres nkoj mus rau hauv lub kua siv lead ua tank, thiab ces lub tshuab nqus tsev rau cov kev txiav txim ntawm nitrogen, lub siab sib txawv ntawm lub sab hauv thiab sab nraum lub kua siv lead ua yuav tsum txhaj mus rau hauv lub CELL

Tus duab thiab kev kho ntawm cov kua siv lead ua txhaj

Txuas tawg: yog txhaj rau hauv lub kua siv lead ua, kua siv lead ua li hais, ob daim ntawm cov iav nias keej.

Txuas aggregation: thaum txhaj mus rau hauv cov kua siv lead ua, kua siv lead ua muaj ib tug loj loj thiab me me, vim hais tias cov kua siv lead ua yog heev me me nyob rau hauv nruab nrab ntawm lub tank yuav dov, ib tug ob peb tuaj ua ke los tsim ib tug Txuas aggregation

5.visual soj ntsuam thiab hluav taws xob ntsuas

Kos rau lub LCD CELL project yog lub ntsiab kua siv lead ua txhaj tom qab kawm tuab si lug soj ntsuam, thaum ntxov teeb pom kev zoo soj ntsuam thiab zaum kawg soj ntsuam thiab cov tshev yog nqa tawm los ntawm nrig txog kev pom.

Peb, LCD module tsim theem

Tus txheej txheem ntawm lub module muaj xws li cov kev twb kev txuas ntawm lub nti iav substrate, cov ntawv luam Circuit Court, lub pressing thiab kev sib khi, lub plhaub thiab cov backlight los ua ke thiab nrhiav kom tau.

Yuav ua li cas cov kua siv lead ua technology ua hauj lwm:

Kua siv lead ua los ntawm ntau kev kho hom mus ua hauj lwm, siv multi cheeb tsam ntsug kawm tuab si lug hom (MVA hom) thiab nyob rau hauv dav hlau switching hom (IPS hom) yuav ua rau lub kua siv lead ua zaub kab rov tav saib lub tau mus txog 170 degrees. Lub MVA hom shortens lub teb lub sij hawm rau 20ms.

(a) TN + zaj duab xis

Los ntawm ib tug kev taw tes ntawm view, TN + zaj duab xis kev daws teeb meem yog ib tug ntawm cov feem ntau yooj yim, TFT zaub manufacturers yuav siv tau los tso saib lub qub LCD twisted nematic (TN: Twisted Nematic) technology, ua ke nrog TFT technology, thiab TN + zaj duab xis technology. Qhov no technology yog mas los ntawm cov zaub npog ib tug tshwj xeeb zaj duab xis, los nthuav rau hauv lub nrig txog kev pom lub peev xwm yuav saib los ntawm 90 degrees kom txog 140 degrees. TN + zaj duab xis yog tib yam li cov txheej txheem TFT zaub yog los ntawm cov kev kho ntawm cov kua siv lead ua molecules mus cuag cov kev tswj ntawm cov duab, nws npog sab sauv nto ntawm ib tug nyias zaj duab xis los ua kom cov qhov muag pom lub. Txawm li cas los, cov txheeb ze tsis muaj zog ntawm lub TFT zaub thiab qeeb tshuaj tiv thaiv lub sij hawm no shortcomings tsis tau hloov. Yog li ntawd TN + zaj duab xis yog tsis yog ib tug zoo txoj kev uas yuav ua li no, nyob rau hauv tas li ntawd rau nws cov nqi yog tsis pheej yig, muaj yog tsis muaj nqis.

(b) IPS (Nyob rau hauv-dav hlau switching)

IPS yog cov tsiaj ntawv ntawm Nyob rau hauv-dav hlau switching, uas txhais tau tias ib tug ca mus, kuj hu ua Super TFT. Thawj tsim los ntawm Hitachi (Hitachi), NEC thiab Nokia yog tam sim no siv no technology tau saib xyuas. Cov txheej txheem yog txawv los ntawm lub twisted nematic zaub (TN-zaj duab xis), uas yog txawv los ntawm lub yooj yim kev kho ntawm cov kua siv lead ua molecules, raws li qhia nyob rau hauv Daim duab 7, thaum lub voltage yog ntxiv rau cov kua siv lead ua molecules thiab lub substrate thaum uas tig mus kev kho. Lub nrig txog kev pom lub siv cov txuj technology los mus tso saib mus rau 170 degrees, lub nrig txog kev pom lub muaj tib lub cathode txoj sab ci raj yog, tab sis qhov no technology kuj muaj disadvantages: nyob rau hauv thiaj li yuav tso cai rau cov kua siv lead ua molecules cov txheej txheem thaum uas tig mus electrodes tsis nyiam cov nematic zaub (TN -Film), nyob rau hauv ob txheej ntawm substrate yog tsuas yog nyob rau qhov uas tsis muaj substrate txheej rau ib tug tib neeg tshwm sim ntawm no yog cov zaub brightness thiab sib piv tsis ho, nyob rau hauv thiaj li yuav txhim kho lub brightness thiab sib piv, tsuas txhim khu lub qhov ci ntawm lub backlight qhov chaw. Raws li ib tug tshwm sim, cov tshuaj tiv thaiv lub sij hawm thiab sib piv nrog rau tib yam TFT zaub yog yam nyuab dua rau kev txhim kho. Yog li ntawd, technology tsis zoo li qhov zoo tshaj plaws tshuaj.

(c) MVA (Multi-sau Vertical Tuab si lug)

MVA multi cheeb tsam ntsug kawm tuab si lug technology, yog tsim los ntawm Fujitsu (Fujitsu) lub tuam txhab, los ntawm ib tug kev taw tes ntawm view, nws yuav siv sij hawm mus rau hauv tus account lub nrig txog kev pom kaum sab xis thiab cov tshuaj tiv thaiv lub sij hawm ob yaam. Nrhiav taum ib tug hais nruab nrab tov. MVA technology ua rau cov qhov muag pom lub mus txog 160 degrees, tab sis tsis yog raws li zoo raws li IPS yuav ncav cuag 170 degrees ntawm nrig txog kev pom lub, tab sis nws 's tseem zoo, vim hais tias cov tshuaj tiv thaiv lub sij hawm ntawm no technology yuav muab zoo dua sib piv thiab tsawg.

Lub M tiam nyob rau hauv MVA txhais tau tias "multi-puav" - lub ntsiab lus ntawm multi cheeb tsam. Raws li muaj nyob rau hauv Daim duab 8, cov ntshav protrusions (protrusion) rau thiaj li hu ua cheeb tsam. Fujitsu tam sim no ua MAV saib nyob rau hauv kev muaj xws li 4 cheeb tsam.

VA yog cov tsiaj ntawv ntawm "ntsug kawm tuab si lug", uas txhais tau tias ntsug tshiab. Txawm li cas los, cia, yuav muaj ib co tsis to taub hais, vim hais tias cov kua siv lead ua molecules tsis raws li qhia nyob rau hauv daim duab (protrusion) yog kiag li ntsug. Thov saib daim duab 8 schematic daim duab qhia nyob rau hauv dub. Thaum ib tug hluav taws xob field yog generated los ntawm ib tug hluav taws xob voltage, cov kua siv lead ua molecules cov txheej txheem ntawm nyob rau hauv thaum uas tig mus nrog txhua lwm yam, yog li ntawd lub backlight teeb qhov chaw yuav dhau, thiab lub teeb rays yuav diverge nyob rau hauv tag nrho cov lus qhia, li no enlarging lub nrig txog kev pom kaum sab xis.

Nyob rau hauv tas li ntawd, MVA kuj muaj sai teb lub sij hawm tshaj IPS thiab TN + zaj duab xis technology, uas yog tseem ceeb heev rau zoo video rov qab thiab residual yeeb yam zoo. MVA LCD zoo tau kuj tau zoo tuaj, tab sis kuj nrog lub visibility ntawm cov kev hloov.

Nyob rau hauv lub kho qhov muag raug mob dabtsi yog khoov tshuab (OCB) teb series tsim rau lub hauv paus ntawm tas nrho cov xim (FSFC) LCD technology tsis tsuas mus rho tus account rau 1/3 ntawm cov nqi ntawm cov xim lim (CF), yuav ua tau kom daws teeb meem ntawm 3 lub sij hawm , lub transmittance yog nce 5 lub sij hawm, thaum simplifying tus txheej txheem, txo tus nqi. Nrog rau txoj kev loj hlob ntawm cov xim zaj duab xis tshuab thiab backlight technology, cov xim tu tub tu kiv muaj peev xwm ntawm TFT screen yog txawm ntau tshaj li CRT. Raws li cov kev kawm ntawv ntawm lub ntsiab kev indexes ntawm khoom zaub TFT screen nyob rau hauv ntau yam zaub li yog lub feem ntau zoo ua luaj, tshwj xeeb tshaj yog cov kev txhim kho ntawm loj lawm technology ntawm TFT screen khoom, ntau ntau ntau yam, multi series ntawm cov khoom kev loj hlob s pace, lub Scope ntawm daim ntawv thov tsis muaj dab tsi.

Cov nram qab no yog ib tug raug ib theem zuj zus ntawm TFT screen:

Qhov twg VSYNC yog tus ncej synchronization teeb liab, VSYNC txhua muab 1 pulses, txhais tau tias tus tshiab 1 screen video ntaub ntawv pib mus rau xa. Thaum lub HSYNC yog ib tug kab synchronization teeb liab, txhua HSYNC mem tes qhia tau hais tias tus tshiab 1 kab ntawm video ntaub ntawv yuav muab xa mus. Lub VDEN yog siv los qhia cov hauj lwm zoo ntawm cov kev yees duab cov ntaub ntawv, VCLK yog siv los xauv qhov video duab cov ntaub ntawv.

Thiab nyob rau hauv tus ncej synchronization thiab synchronization ntawm lub taub hau thiab tus Tsov tus tw yog yuav tsum muaj ib tug flyback lub sij hawm rau VSYNC, piv txwv li, ua ntej lub flyback lub sij hawm yog (VSPW + 1) + (VBPD + 1), tom qab lub flyback lub sij hawm no kuj zoo xws li cov (VFPD +1); HSYNC. Qhov no yog tus thawj CRT zaub sij hawm uas yuav tsum tau vim lub electron phom deflection yuav siv sij hawm lub sij hawm, tab sis tom qab ua lub txoos kev lag luam txheem, raws li zoo raws li lub TFT screen nyob tom qab nyob rau hauv lub sij hawm nyob rau hauv CRT tshaj, twb tseem siv tau los tswj lub sij hawm.

Tsim ntawm TFT-LCD tsav tsheb Circuit Court

Lub VGA interface teeb liab yog hloov dua siab tshiab rau lub analog LCD zaub tsav tsheb Circuit Court, siv Adi muaj kev kawm siab DSP nti ADSP-21160 mus cuag lub ntsiab muaj nuj nqi ntawm lub tsav Circuit Court.

Kho vajtse Circuit Court tsim

AD9883A yog ib tug high-kev ua tau zoo peb channel video ADC yuav ib txhij ua tau tiag tiag-lub sij hawm cov zauv ntawm RGB tricolor teeb liab. Lub system siv 32 ntsis floating-point ADSP-21160 nti rau cov txheej txheem rau cov ntaub ntawv, muaj peev xwm ua kom tiav cov real-time gamma kho, lub sij hawm puag kho, cov duab ua thiab optimization, kom tau raws li qhov kev kawm uas yuav tsum tau ntawm lub system. ADSP-21160 muaj 6 ywj siab kev kub ceev 8 me ntsis thaum uas tig mus txuas junctions, uas yog kev cob cog rua rau pem hauv ntej thaum xaus ntawm lub ADSP-21160 analog rau cov hloov dua siab tshiab nti AD9883A thiab tus tom qab-kawg cov mus analog conversion nti ADV7125. ADSP-21160 muaj ib tug super Harvard architecture, txhawb ib qhia operand (SIMD) hom, siv hom lus programming mus cuag npaum muab tso ua ke ntawm real-time ua ntawm video teeb liab, tsis vim hais tias ntawm ntev lub sij hawm ncua thiab cov ntaub ntawv ua.

System kev kho vajtse schematic daim duab qhia nyob rau hauv daim duab 1. Lub system yuav ua kom tiav lub tswv yim thiab tso zis los ntawm kev siv ntau saw junctions. Analog video teeb liab los ntawm AD9883A mus ua kom tiav analog rau cov hloov dua siab tshiab. AD9883A yog ib tug peb channel ADC, li ntawd, lub kaw lus yuav ua kom tiav monochrome video teeb liab ua, xim video teeb liab ua yuav tau ua kom tiav. Lub sampled digital video teeb liab yog cov tswv yim mus rau lub ADSP-21160 los ntawm lub saw tshuam, thiab cov qhov tso zis teeb liab yog tso zis rau ADV7125 tom qab txawv ua. ADV7125 yog ib tug peb channel DAC, kuj yuav siv tau los hais nrog rau xim Pib ntsais koj teeb. Lub tso zis video teeb liab mus rau lub grey voltage tiam Circuit Court, tus tsav voltage yuav tsum tau mus tsav lub LCD screen. ADSP-21160 kuj muaj ib tug universal programmable I / O chij pin, uas yuav siv tau los txais sab nraud tswj Pib ntsais koj teeb, xa tswj ntaub ntawv mus rau lub system thiab nws cov modules nyob rau hauv thiaj li yuav ua rau tag nrho cov system ua hauj lwm stably thiab orderly. Piv txwv li, ADSP-21160 muab cov kev tsim nyog tswj Pib ntsais koj teeb rau lub grayscale voltage tiam Circuit Court thiab lub LCD screen. Nyob rau hauv tas li ntawd, cov system kuj teem ib tug xov tooj ntawm LED teeb, siv los visually qhia lub system kho vajtse thiab DSP nrog cov txheej txheem rau txhua module ua hauj lwm lub xeev.

Daim duab 1 Schematic daim duab ntawm system kho vajtse

Qhov no tsim siv cov flash khau raj txoj kev mus thauj khoom DSP pab cov ntaub ntawv, flash nco muaj ib tug high nqi kawm, loj me me, tsis tshua muaj zog noj. Qhov no system yog vim flash nco DSP kev pab cuam, tab sis kuj txuag lub sib nug xov lookup rooj ntaub ntawv thiab cov zaub cov ntaub ntawv nyob rau hauv ntau qhov chaw ntawm lub neej ntawd gamma nqi, li ntawd, cov kev xaiv ntawm ST peev xwm loj M29W641DL, thiaj yuav cawm tau cov kev pab code, thiab muaj peev xwm txuag qhov tsim nyog cov ntaub ntawv thiab cov ntaub ntawv.

Daim duab 2 yog tus DSP thiab flash interface Circuit Court. Vim hais tias cov kev siv ntawm 8 me ntsis flash khau raj hom, yog li ADSP-21160 chaw nyob kab yuav tsum tau siv A20 rau A0, cov ntaub ntawv kab yog D39 ~ 32, nyeem thiab sau ntawv flash nco thiab nti xaiv Pib ntsais koj teeb tau txais coj pins.

Daim duab 2 DSP thiab Flash interface Circuit Court

System muaj nuj nqi thiab Realization

Qhov no tsim siv ADSP-21160 mus ua kom tiav lub gamma kho, lub sij hawm puag kho, moos generator, duab optimization thiab kev tswj teeb liab generating muaj nuj nqi.

Gamma kho hauv paus ntsiab lus

Nyob rau hauv LCD, cov duab cov ntaub ntawv ntawm IC / LSIDAC tsav lub teeb liab ntawm linear hloov, thiab electro-optic thaj chaw ntawm kua siv lead ua yog nonlinear, li ntawd, yuav tau kho cov voltage ntawm cov kua siv lead ua, kua siv lead ua zaub brightness kom tau raws li lub linear, gamma (gamma kho) . Gamma kho yog ib qho tseem ceeb cov txheej txheem kom paub lub nrig txog kev pom cov ntaub ntawv ntawm tus thawj yam khoom los yog lub thawj daim duab. Kev siv ntawm saib-up rooj pab kom txawm peem lub electro-kho qhov muag khoom ntawm kua siv lead ua gamma kho txoj kev yuav ua kom lub kua siv lead ua zaub system muaj tus zoo tagnrho cov hloov mus rau lwm muaj nuj nqi. Lub tswv yim thiab tso zis nkhaus ntawm lub LCD system yog S. Cov kev ua ntawm lub gamma rooj yog mus hloov lub ADC teeb liab mus rau hauv ib qho rov qab S zoo nonlinear transformation, thiab thaum kawg, lub tswv yim thiab tso zis curves ntawm cov kua siv lead ua zaub system tau raws li qhov tiag tiag uas yuav tsum tau.

LCD gamma kho qauv raws li qhia nyob rau hauv Daim duab 3, lub LCD electro-optic yam ntxwv nkhaus, lub ci ci ntawm LCD curves thiab voltage hloov dua siab tshiab daim ntawv.

Daim duab 3 Schematic daim duab ntawm LCD gamma kho

Gamma kho siv

Qhov no daim ntawv siv scientific gamma kho ua technology, cov digital video Pib ntsais koj teeb yog feem peb xim cov gamma kho (los yog kho ntawm lub simulated peb xim video Pib ntsais koj teeb tau gamma). Nyob rau tib lub sij hawm, lub gamma kho yuav tsis ploj, yog li ntawd rau tag nrho cov xim zaub duab yog ntau tiag tiag li, xav zoo zoo, meej.

Ib tug monochromatic gamma hloov txheej txheem raws li qhia nyob rau hauv Daim duab 4, cov lwm yam ob xim yog cov tib. Piv txwv li, ADSP-21160 yog thawj saib lub rooj kom tau lub gamma hloov coefficient (gamma tus nqi). Ces, raws li cov gamma nqi thiab lub tswv yim zaub cov ntaub ntawv, lub thib ob zoo-up lub rooj yog tau. Tus thawj saib-up rooj gamma nqi yog cov tswv yim rau cov kev tswj module los ntawm cov sab nraud tswj lub teeb liab rau cov thawj lub sij hawm mus xyuas lub rooj. 8 tug lej zaub cov ntaub ntawv teeb liab rooj ntawm tus xov tooj ntawm 0 mus 255 gray teev zaub cov ntaub ntawv (gamma kho).

Daim duab 4 monochromatic gamma hloov txheej txheem

duab optimization

Nyob rau hauv thiaj li yuav txhim kho cov duab zoo, ADSP-21160 no yog tsim los optimize cov duab los thiab stunt module, ntau nyob rau hauv lub simulation ua yuav tsis ua hauj lwm muaj peev xwm yuav nqa tawm nyob rau hauv cov ua, piv txwv li, ob-seem cov filtering, contour kho, zaus nyob, yog xim nthuav dav nyiaj matrix (linear matrix circuit Court), dub kho, G kho, lub koob Lan kho tau hloov, dub theem tswj thiab stray teeb nyiaj, zoo hloov, cov kev kho mob yog los txhim kho cov duab zoo.

Yog qhov loj ntawm lub digital los, cov kev yees duab teeb liab nws tus kheej thiab txoj hauj lwm kev hloov ntawm brightness thiab hloov xim ntawm lub teeb liab cov ua, nws yuav ua tau cov duab rau hauv ntau yam kev rho los, nyob rau hauv kev tshuaj ntsuam zoom, kev sib hloov, uas yog tsis tau paub lub simulation ntawm lub stunt. Lim kuj yuav tsim los lim tawm ib co ntawm cov cuam lub teeb liab thiab cov suab nrov teeb liab, yog li ntawd cov duab clarity yog ntau dua, zoo dua tu tub tu kiv ntawm thawj daim duab. Tag nrho cov Pib ntsais koj teeb thiab cov ntaub ntawv uas muab nyob rau hauv lub DSP, uas yog generated los ntawm lub moos module thiab tswj module.

Lub sij hawm puag kho thiab tswj system

Vim lub internal ADSP-21160 module zog thiab lub sij hawm txawv, muaj ib co kev ncua ntawm txhua tus module, nws xav tau kev pab cov sij hawm puag kho, qhov kawg tso zis tej ntaub ntawv cim xeeb yuav nruj me ntsis raws li tsis muaj overlapping los yog discontinuous ntaub ntawv. Cov sij hawm puag kho yog tsuas yog siv rau txoj kev kho tus yees duab teeb liab kab, teb synchronization teeb liab lub sij hawm poob yuam kev. Ua ntej ntawm tag nrho cov, nws yuav ua tau ib tug kho lus teeb liab mus rau lub sij hawm puag teeb liab raws li ib tug siv mus rau lub cim xeeb. Tom qab ntawd, TFT-LCD lub sij hawm puag teeb liab li lub reference yuav tsum tau nyeem tawm, lub sij hawm puag yuam kev me me video teeb liab. Nyob rau tib lub sij hawm nws kuj ntxiv lwm nta lub video teeb liab yuav tau kho brightness, Chroma, saturation, nyob rau tib lub sij hawm, theem, yoj load theem hloov, thiab muaj cov kev ua ntawm lub moos.

Tus tswj module yog mas lub luag hauj lwm rau cov sij hawm poob tswj logic Circuit Court tsav cov kev tswj thiab cov lag luam los ntawm ntau yam kev haumxeeb modules, xws li cov zaub cov ntaub ntawv cim xeeb tswj thiab cov lag luam, yuav tsum luag hauj lwm rau cov zaub cov ntaub ntawv thiab kev qhia kis tau tus mob tsis nyob rau hauv qhov chaw, yuav muaj lub luag hauj lwm rau tus txheem ntawm lub register tsis mus rau hauv cov coj zaub logic. Lub sab hauv lub teeb liab generator generates ib tug tswj lub teeb liab thiab ib qho chaw nyob, thiab generates ib tug tswj lub teeb liab mus raws li tus kab rov tav thiab ntsug zaub thiab cov blanking counter nqi. Nyob rau hauv tas li ntawd, nws yuav tau txais sab nraud tswj Pib ntsais koj teeb tau tib neeg lub computer sis, yog li ntawd lub Circuit Court yog ntau haib, ntau saj zawg zog.

Nyob rau hauv tas li ntawd, lub ADSP21160 kuj tsim lub I2C tsheb npav tswj module, analog I2C tsheb npav mus ua hauj lwm, rau lwm I2C interface ntaus nrog SCLK (serial moos teeb liab) thiab SDA (ob-txoj kev serial cov ntaub ntawv teeb liab). Cov kev khiav hauj lwm lub xeev ntawm cov simulated I2C yog qhia nyob rau hauv Daim duab 5 thiab daim duab 6.

Daim duab 5 serial chaw nres nkoj nyeem / sau cov sij hawm poob

Daim duab 6 serial interface - raug byte hloov lwm lub tsev

System software siv

Nyob rau hauv lub software tsim, raws li qhia nyob rau hauv Daim duab 7, lub Matlab software yog siv los mus xam tus kho lus nqi, thiab muab cia rau hauv daim ntawv ntawm ib tug zoo-up cov lus, rau lub sij hawm hu. Hwj chim rau lub cev, cov thawj mus ua kom tiav ib tug series ntawm ADSP-21160 register chaw, yog li ntawd DSP yuav ua hauj lwm zoo thiab zoo. Thaum lub ADSP-21160 tau txais ib tug zoo video teeb liab, cov gamma nqi yog txiav txim raws li cov sab nraud tswj ntaub ntawv. Nyob rau hauv thiaj li yuav hloov mus rau txawv TFT-LCD screen los tso saib cov video teeb liab, lub kaw lus yuav kho cov gamma nqi mus kho cov zaub nyhuv rau qhov zoo tshaj plaws. Raws li muaj nyob rau hauv Daim duab 4, cov lus zoo-up ntawm yav tas los muab cov ntaub ntawv, kom tau qhov yuav tsum tau kho tus nqi, thiab ces tos lis lub kauj ruam tom ntej. Raws li tus yam ntxwv ntawm tus yees duab teeb liab thiab cov kev xav tau ntawm tus neeg siv, lub kaw lus yuav kuj tau ib co duab optimization thiab tshwj xeeb cov teebmeem, xws li cov two-dimensional cov filtering, contour kho, nce hloov, zoo hloov, thiab lwm yam .. Cov ua hauj lwm yuav xaiv siv los ntawm tus neeg siv. Kev siv cov ADSP-21160 kuj yuav ua tau cov duab flip, stagnation thiab lwm yam stunts. Thaum kawg, cov sij hawm puag kho, mas siv rau kev kho cov kev yees duab teeb liab kab, teb synchronization teeb liab lub sij hawm poob yuam kev, qhov kawg tso zis tej ntaub ntawv cim xeeb yuav nruj me ntsis raws li tsis muaj overlapping los yog discontinuous ntaub ntawv. Nyob rau hauv tas li ntawd mus rau saum toj nta, ADSP-21160 kuj muaj cov kev tsim nyog tswj Pib ntsais koj teeb rau lub grayscale voltage tiam Circuit Court thiab lub TFT-LCD screen nyob rau hauv raws li cov sij hawm poob tswj lub teeb liab. Nyob rau hauv tas li ntawd, lub ADSP-21160 kuj yuav tsum tau muab teem mus tsav lub dav configuration ntawm cov I / O pin LED teeb, zaub system operating xeev.

Daim duab 7 software txaus daim ntawv