TFT yog qhov txawv ntawm LCD. TFT yog ib hom active matrix hom kua siv lead ua zaub AM-LCD. TFT yog nruab nrog lub teeb tshwj xeeb yeeb nkab rau sab nraum qab ntawm cov kua siv lead ua kua, uas tuaj yeem" nquag" tswj txhua tus kheej pixel ntawm qhov screen. Nws yog lub hauv paus chiv keeb ntawm lub npe hu ua Active Matrix TFT (AcTIve Matrix TFT), uas tuaj yeem ua rau lub sijhawm teb zoo heev. Feem ntau, lub sij hawm teb ntawm TFT kuj ceev, txog 80ms, thaum STN yog 200ms. Yog tias koj xav nce nws, flicker yuav tshwm sim. Thiab vim tias TFT yog ib qho active matrix LCD, qhov kev npaj ntawm cov kua siv lead ua kua tuaj yeem nco tau, thiab yuav tsis rov qab mus rau lub xeev qub tam sim tom qab tam sim no ploj mus. TFT kuj txhim kho STN flicker (dej ripple)-pwm lub pas dej tshwm sim thiab ua kom muaj peev xwm ua si cov duab zoo. Piv nrog rau STN, TFT muaj cov xim zoo heev saturation, txo kev muaj peev xwm thiab siab dua qhov sib txawv, tab sis qhov tsis zoo yog tias nws siv zog ntau dua thiab raug nqi ntau dua.
LCD: Liquid Crystal Display, kua siv lead ua kua zaub, feem ntau muab faib ua: monochrome, pseudo xim, xim tseeb thiab lwm yam. Thiab TFT yog ib hom LCD, tseem hu ua qhov tseeb xim screen. Qhov ci ntsa iab thiab pom lub kaum ntse ntse muaj zog dua li ob qho!
LCD hais txog cov kua siv lead ua kua, TFT yog ib hom LCD
Cov kua siv lead ua kua ntau tau muab faib ua plaub hom raws li lawv lub cev qauv:
(1) Twisted Nematic (TN-Twisted NemaTlc);
(2) Super Twisted Nematic (STN-Super TN);
(3) Ob chav Super Twisted Nematic (DSTN-Dual Scan Tortuosity Nomograph);
(4) Thin Film Transistor (TFT-Thin Film Transistor).
Ntawm lawv, cov ntsiab lus tseem ceeb ntawm TN-LCD, STN-LCD thiab DSYN-LCD yog tib yam, tshwj tsis yog tias lub kaum sab xis ntawm cov kua molecules txawv. Lub kaum sab xis ntawm STN-LCD kua molecules yog 180 degrees lossis txawm 270 degrees. Lub TFT-LCD txais yuav ib hom zaub sib txawv kiag li los ntawm TN series LCD.
TFT-LCD thev naus laus zis yog kev sib xyaw ua ke ntawm microelectronics thev naus laus zis thiab kua siv lead ua kua siv tshuab. Cov neeg siv thev naus laus zis ntawm microelectronics fine processing ntawm si, hloov nws mus rau kev ua ntawm TFT array ntawm thaj tsam loj iav, thiab tom qab ntawd siv cov array substrate thiab lwm cov substrate nrog cov xim lim zaj duab xis, siv cov tshuab LCD paub tab, ua kua siv lead ua kua cell. thiab ua ke, thiab tom qab ntawd tom qab cov txheej txheem xws li polarizing zaj duab xis sticking thiab lwm yam txheej txheem, cov kua siv lead ua kua (screen) thaum kawg tsim.
Hauv TFT-LCD, kev ua haujlwm ntawm TFT yog sib npaug rau lub raj hloov. Feem ntau siv TFT yog cov khoom siv peb lub davhlau ya nyob twg. Feem ntau, ib txheej semiconductor yog ua rau ntawm iav substrate, nrog rau qhov chaw thiab ntws txuas rau nws ntawm ob qho kawg. Thiab los ntawm daim phiaj insulating ntsuab zaj duab xis, rov qab mus rau lub semiconductor, ib daim phiaj yog muab. Qhov hluav taws xob siv rau lub rooj vag yog siv los tswj qhov tam sim no ntawm qhov chaw thiab qhov dej electrodes.
Rau lub vijtsam zaub, txhua pixel tuaj yeem ua kom yooj yim hauv cov qauv ua ib txheej ntawm cov kua siv lead ua kua nplaum ntawm cov pixel electrode thiab cov electrode. Qhov tseem ceeb tshaj, nws tuaj yeem siv los ua lub capacitor los ntawm qhov pom hluav taws xob. Qhov sib npaug Circuit Court yog pom nyob rau hauv daim duab 1. Yuav kom them tus pixel P (i, j) nyob rau hauv kab j thiab i kem, lub hloov T (i, j) yuav tsum tau tig rau siv lub hom phiaj voltage rau lub teeb liab kab D ( i). Thaum lub pixel electrode tau them tag nrho, txawm tias qhov hloov pauv tau raug kaw, tus nqi hauv lub capacitor tau khaws cia, thiab cov kua siv lead ua kua txheej molecules ntawm cov electrodes txuas ntxiv muaj cov ntawv thov hluav taws xob. Kev ua haujlwm ntawm cov ntaub ntawv (kem) tsav tsheb yog siv lub hom phiaj voltage rau kab teeb liab, thiab kev ua haujlwm ntawm lub rooj vag (kab) tsav tsheb yog qhib thiab tawm ntawm qhov hloov. Txij li thaum cov khoom siv hluav taws xob siv rau cov kua siv lead ua kua txheej tuaj yeem khaws cia rau hauv lub capacitor ntawm txhua pixel, cov kua siv lead ua kua txheej tuaj yeem ua haujlwm ruaj khov. Qhov kev ntsuas hluav taws xob no tseem tuaj yeem rov sau dua nyob rau lub sijhawm luv luv los ntawm TFT, yog li txawm tias nyob rau hauv lub siab txhais LCD, nws tuaj yeem ua tau raws li qhov yuav tsum tau ua kom tsis txhob degrading cov duab zoo.
Tus yuam sij rau kev nthuav tawm cov duab kuj yog qhov kev taw qhia molecular ntawm cov kua siv lead ua kua nyob rau hauv qhov kev txiav txim ntawm hluav taws xob teb. Feem ntau, cov qauv sib txawv tau pom tau los ntawm kev ua kom zoo ntawm sab hauv ntawm lub substrate los tsim cov qauv kev xav tau deformation ntawm kev teeb tsa ntawm cov kua siv lead ua kua molecules. Xaiv ib hom zaub, nyob rau hauv qhov kev txiav txim ntawm ib qho hluav taws xob teb, kev taw qhia ntawm cov kua molecules hloov, thiab kev siv ntawm qhov teeb meem teeb tom qab dhau los ntawm cov kua siv lead ua kua txheej hloov raws li qhov sib txuam nrog cov polarizer. Yog li kom paub cov duab tso saib. Tag nrho hauv tag nrho, TFT-LCD txawv ntawm qhov yooj yim matrix ntawm passive TN-LCD thiab STN-LCD. Nws yog nruab nrog nyias zaj duab xis transistor (TFT) ntawm txhua pixel ntawm cov kua siv lead ua kua, uas tuaj yeem kov yeej qhov teeb meem ntawm qhov tsis yog qhov rooj. Crosstalk ua rau cov yam ntxwv zoo li qub ntawm cov zaub LCD npo ywj pheej ntawm cov kab scanning, yog li txhim kho cov duab zoo. Cov yam ntxwv ntawm qhov hloov pauv (piv txwv li, TFT) yuav tsum ua kom tau raws li qhov yuav tsum tau muaj ntawm kev ua haujlwm qis hauv lub xeev thiab kev tawm tsam loj heev.
Cov ntaub ntawv hais txog LCD npo:
Qhov twg zoo dua, LCD lossis OLED, thiab qhov txawv yog dab tsi?
Yuav ua li cas tswj lub vijtsam LCD kom muaj lub neej ua haujlwm ntev?
Lub hauv paus ntsiab lus ua haujlwm ntawm LCD npo
