TFT yog ib hom sib txawv ntawm LCD, TFT, Thin Film Transistor yog ib yam ntawm cov khoom siv roj ntsha hauv siab AM-LCD, TFT teev lub raj tshwj xeeb lub teeb rau sab nraum qab ntawm cov kua siv lead ua kua, tuaj yeem ua "active" ntawm lub vijtsam Independent pixels kev tswj, uas yog lub hauv paus ntawm qhov sib txawv ntawm TFR (AcTIve Matrix TFT), uas tau heev txhim kho lub sij hawm fab, lub sij hawm ua ke ntawm TFT yog ceev dua, txog 80ms, thaum STN yog 200ms, yog tias koj xav kom txhim kho Yuav muaj qhov muag dig. Tshaj li, txij li lub TFT yog ib qho matrix LCD, qhov kev hloov ntawm cov kua nplaum yuav ua tau lub cim xeeb thiab tsis tuaj yeem txum tim rov qab tam sim ntawd tom qab tam sim no disappears. Lub TFT kuj pab kho qhov STN flicker (blur) -blur phenomenon zoo txhim kho lub peev xwm ua si dynamic duab. Muab piv rau STN, TFT muaj xim zoo nkauj, txo kev muaj peev xwm thiab siab zoo dua, tab sis qhov tsis zoo yog tias nws kov ntau zog thiab nqi ntau dua.
LCD: Cream Crystal Display, kua siv lead ua kua, muab faib ua: monochrome, pseudo-color, true color and so on. TFT yog ib hom LCD, tseem hu ua qhov tseeb xim. Qhov ci ntsa iab thiab pom lub kaum ntse ntse tseem muaj zog tshaj ob yam!
LCD hais txog cov kua siv lead ua kua, TFT yog ib hom LCD
Cov kua siv ua kua (crystal display) muab faib ua plaub hom raws li lub cev nqaij tawv:
(1) Tiv thaiv nematics (TN-Twisted NemaTIc);
(2) Super Twisted Nematic (STN-Super TN);
(3) DSTN-Dual Scan Tortuosity Nomograph;
(4) TFT-Thin Film Transistor.
Cov qauv txheej txheem yooj yim ntawm TN-LCD, STN-LCD, thiab DSYN-LCD yog tib yam, tshwj tsis yog tias cov voj voos ntawm cov kua siv lead ua kua molecules sib txawv. Cov kua siv lead ua kua molecules ntawm STN-LCD muaj qhov sib tw ntawm 180 degrees lossis txawm tias 270 degrees. Lub TFT-LCD tau txais ib qho kev sib txawv kiag li hom dua li TN series LCD.
TFT-LCD tshuab yog ib lub tshuab uas sib txuas nrog kev siv tshuab thiab tshuab ua kua siv ua kua. Cov neeg tau siv cov micro-electronics nplua ua tshuab ntawm Si, transplanted rau AUTHORIZED ntawm TFT arrays nyob rau hauv loj-cheeb tsam iav, thiab tom qab ntawd siv qhov array substrate nrog lwm substrate nrog xim xim zaj duab xis thiab matured LCD tshuab. Cov kua siv kua qaub (cell crystal cell) muab tso ua ke los ua cov kua tshuaj siv ua kua (screen) tom qab niaj hnub siv kev ua haujlwm xws li cov qauv khawb av.
Hauv TFT-LCD, qhov kev ua haujlwm ntawm TFT yog sib npaug rau cov raj xa mus. Feem ntau siv TFT yog ib qho khoom siv davhlau ya raws peb. Ib txheej dab semiconductor feem ntau yog ua rau iav substrate nrog qhov chaw thiab ntws txuas nrog ob hnub. Thiab los ntawm lub rooj vag insulating zaj duab xis, rov qab rau lub semiconductor, nrog ib daim phiaj. Lub qhov hluav taws xob tau siv rau lub qhov rooj tiv thaiv tam sim no ntawm qhov chaw thiab tso dej electrodes.
Rau ib qho screen npo, txhua pixel yuav ua kom yooj yim nyob rau hauv cov qauv ua ib txheej ntawm kua Crystal sandwiched ntawm ib qho pixel electrode thiab ib qho kev electrode. Ntau qhov tseem ceeb, nws tuaj yeem pom raws li lub hau capacitor ntawm qhov hluav taws xob pom. Qhov sib npaug ntawm daim phiaj sib npaug no muaj nyob hauv daim duab 1. Yuav tsum yog tus nqi pixel P (i, j) nyob rau hauv kem u kuv sab, qhov hloov T (i, j) yog muab los siv rau lub ntsiab lus ntawm qhov hluav taws xob D (i) . Thaum lub pixel electrode yog siab them, txawm tias qhov kev hloov yog muab tua, tus nqi hauv lub capacitor yog fwm, thiab cov kua siv lead ua kua molecules ntawm cov electrodes tseem muaj ib daim ntawv thov voltage. Lub luag hauj lwm ntawm tus neeg tsav tsheb (kem) yog siv lub hom phiaj ntawm qhov taw hluav taws xob, thiab lub rooj vag (kab) tsav ua haujlwm kom tig tus tes taw rau thiab tawm. Vim cov zaub voltage tau thov rau cov kua siv lead ua kua yuav muab khaws cia rau hauv qhov ua kom muaj peev xwm ntawm txhua lub pixel, cov kua siv lead ua kua yuav ua tau kom ruaj. Qhov kev pom muaj hluav taws xob no kuj tuaj yeem raug rov sau ua ntaub ntawv luv luv los ntawm TFT, yog li ntawd hauv lub siab, txhais tau tias yuav tsum tsis txhob muaj cov duab zoo.
Tus yuam sij rau kev tso duab rau ib qho duab yog qhov tseem ceeb ntawm txoj kev siv cov kua dej ua kua hauv qhov kev ua ntawm lub teb hluav taws xob. Feem ntau, kev sib txawv ntawm cov qauv pom tau los ntawm qhov sib tw ntawm cov khoom siv sib luag ntawm cov kua siv lead ua los ntawm kev siv hauv cov substrate. Xaiv ib hom zaub, nyob rau hauv qhov kev txiav txim ntawm cov hluav taws xob, cov kua siv lead ua kua molecules tsim kev hloov ntawm kev hloov, thiab los ntawm kev koom tes nrog lub ncov qaum, kev siv qhov teeb meem tom qab dhau los ntawm cov kua siv lead ua kua hloov. Yuav kom ua tiav cov duab saib. Tag nrho nyob rau hauv tag nrho, TFT-LCD yog txawv ntawm qhov yooj yim matrix ntawm passive TN-LCD thiab STN-LCD. Nws muaj nyias zaj duab xis transistor (TFT) rau txhua lub pixel ntawm cov kua siv lead ua kua, uas tuaj yeem ua kom tsis zoo rau lub sijhawm tsis xaiv. Crosstalk ua rau cov yam ntxwv zoo li qub ntawm lub vijtsam duab ntawm tus naj npawb ntawm cov kab scan, yog li txhim kho cov duab zoo. Cov yam ntxwv ntawm cov khoom sib hloov (piv txwv li, TFT) yuav tsum ua kom tau raws li qhov yuav tsum tau ua rau hauv xeev lub xeev kev qis qis thiab lub xeev nyob ntawm lub xeev yuav tsis loj heev.
