1, Tus nqi siab: yog ib qho tseem ceeb txwv tsis pub muaj npe nrov
Lub ntsiab kom zoo dua ntawm TFT cov ntxaij vab tshaus yog nyob rau hauv lawv cov active matrix tsav tshuab, qhov twg txhua pixel yog tswj los ntawm ib tug ywj siab nyias zaj duab xis transistor, ua tiav siab -precision xim luam thiab dynamic zaub. Txawm li cas los xij, qhov kev siv thev naus laus zis no ncaj qha tsav cov nqi tsim khoom.
Cov nqi ntawm cov khoom siv thiab cov txheej txheem: TFT cov ntxaij vab tshaus yuav tsum tau iav substrates, pob tshab conductive films (xws li ITO), cov ntaub ntawv siv lead ua kua, thiab nyias zaj duab xis transistor arrays, nrog rau cov khoom siv ntau dua li cov tshuaj LCD lossis STN cov ntxaij vab tshaus. Piv txwv li, thaum qhov kev daws teeb meem ntawm 4.3-inch TFT screen nce mus txog 800 × 480, nws qhov pixel ceev thiab tsav Circuit Court complexity deb tshaj qhov qis tshaj -kawg zaub thev naus laus zis, uas ua rau 30% -50% nce ntawm tus nqi ib zaug.
Yield Challenge: Qhov tsis xws luag ntawm transistor arrays ncaj qha cuam tshuam rau tus nqi tawm los thaum TFT ntau lawm. Piv txwv li, thaum txiav loj - iav substrates loj, ib qho transistor tsis ua haujlwm yuav ua rau tag nrho cov vaj huam sib luag raug muab pov tseg, ntxiv cov nqi ntxiv. Txawm hais tias kev nce qib thev naus laus zis tau nce tus nqi xa tawm mus rau ntau dua 90%, qhov txiaj ntsig ntawm cov khoom siv siab- kawg (xws li qib kho mob TFT cov ntxaij vab tshaus) tseem qis dua 85%, cuam tshuam ncaj qha rau hauv cov nqi davhlau ya nyob twg.
Kev txwv tsis pub siv hauv kev lag luam: Hauv kev lag luam kev lag luam, cov khoom siv hluav taws xob raug nqi (xws li qis-kawg cov khoom siv digital) feem ntau xaiv monochrome LCD lossis segment code screens, uas tsuas yog 1/5 txog 1/10 ntawm tus nqi ntawm TFT cov ntxaij vab tshaus. Txawm tias nyob rau hauv nruab nrab mus rau siab kawg kev ua lag luam, qhov nrov ntawm TFT cov ntxaij vab tshaus yog txwv los ntawm kev txwv nyiaj txiag. Piv txwv li, hauv tsheb dashboards, TFT cov ntxaij vab tshaus feem ntau yog siv rau cov qauv siab - kawg, thaum lub tsheb kev lag luam tseem tau txais kev sib txuas ntawm cov cuab yeej taw qhia thiab cov kev daws teeb meem me me - LCD.
2, Tsis txaus ib puag ncig adaptability: kev ua haujlwm tsis zoo nyob rau hauv huab cua
Cov cuab yeej siv cuab yeej siv feem ntau yuav tsum tau ua haujlwm nyob rau hauv qhov chaw huab cua xws li qhov kub thiab txias, tsis tshua muaj kub, lub teeb muaj zog, thiab kev cuam tshuam hluav taws xob, thiab kev hloov pauv ib puag ncig ntawm TFT cov ntxaij vab tshaus yog ib txwm txwv.
Temperature range limited: The working temperature of standard TFT screens is usually between -20 ℃ and 70 ℃. Beyond this range, the response speed of liquid crystal molecules decreases, resulting in display ghosting or color distortion. For example, in Arctic scientific research equipment or desert monitoring instruments, low temperatures may cause liquid crystal solidification, while high temperatures accelerate backlight aging and shorten equipment lifespan. Although industrial grade TFT screens can be extended to a temperature range of -30 ℃ to 85 ℃ through special materials and processes, the cost increases by 20% -30% and still cannot meet the needs of extreme scenarios such as aerospace and deep sea.
Kev nyeem tsis zoo nyob rau hauv lub teeb muaj zog: TFT cov ntxaij vab tshaus cia siab rau lub teeb pom kev zoo, uas tuaj yeem yooj yim ua rau muaj kev cuam tshuam thiab teeb pom kev hauv qab lub teeb pom kev zoo. Piv txwv li, thaum lub ntsuas hluav taws xob tau teeb tsa sab nraum zoov, lub hnub ci ncaj qha tuaj yeem ua rau pom cov ntsiab lus tsis pom tseeb, uas yuav tsum tau txhim kho los ntawm cov txheej txheem tiv thaiv kev cuam tshuam los yog cov teeb pom kev zoo siab (xws li 1000cd / m ² lossis ntau dua), tab sis nws yuav ua rau kom muaj zog thiab nqi zog.
Electromagnetic cuam tshuam rhiab heev: TFT tsav Circuit Court yog rhiab heev rau lub suab nrov electromagnetic, thiab nyob rau hauv muaj zog electromagnetic ib puag ncig xws li high-voltage substations thiab industrial automation ntau lawm kab, tso saib txawv txav yuav tshwm sim vim muaj teeb meem cuam tshuam. Txawm hais tias kev tiv thaiv kev tsim thiab lim cov circuits tuaj yeem daws qhov teeb meem no, lawv yuav ua rau cov khoom siv tsis yooj yim thiab cov nqi tu.
3, Qhov tsis sib xws ntawm kev siv hluav taws xob thiab roj teeb lub neej: qhov kev sib tw tseem ceeb ntawm cov khoom siv nqa tau
Hauv cov cuab yeej siv hluav taws xob siv hluav taws xob xws li cov khoom siv tes tuav thiab cov cuab yeej saib xyuas kev noj qab haus huv, kev siv hluav taws xob yog qhov ntsuas tseem ceeb uas txiav txim siab qhov ua tau zoo ntawm cov khoom siv, thiab qhov teeb meem siv hluav taws xob ntawm TFT cov ntxaij vab tshaus yog qhov tshwj xeeb.
Kev faib ua feem ntau ntawm cov teeb pom kev siv hluav taws xob: Lub teeb pom kev zoo ntawm TFT npo feem ntau suav rau 60% -80% ntawm tag nrho cov kev siv hluav taws xob. Piv txwv li, 4.3-nti TFT npo tuaj yeem haus txog 50mA (3.3V lub zog hluav taws xob) thaum lub teeb ci tag nrho, thaum lub vijtsam hluav taws xob ntawm tib qhov loj siv tsuas yog 1/10 ntawm nws lub zog. Txawm hais tias PWM dimming thev naus laus zis tuaj yeem txo qis kev siv hluav taws xob nruab nrab, nws tseem tsis tuaj yeem sib tw nrog cov khoom siv hluav taws xob zoo xws li segmented LCD ntawm qhov ci qis.
Dynamic cov ntsiab lus exacerbates zog noj: dynamic zaub ntawm TFT cov ntxaij vab tshaus (xws li waveform hloov tshiab thiab animated interfaces) yuav tsum tau tas li pixel refresh, ntxiv zog noj. Piv txwv li, TFT npo ntawm cov cuab yeej siv kho mob ultrasound siv 40% lub zog ntau dua li cov duab zoo li qub thaum pom cov duab ultrasound hauv lub sijhawm tiag tiag -, uas txwv lub roj teeb lub neej ntawm cov khoom siv nqa tau.
Kev Tswj Xyuas Kev Kub Ntxhov: Kev siv hluav taws xob ntau ua rau cov cuab yeej ua kom sov, uas tuaj yeem cuam tshuam qhov tseeb ntawm cov sensors sab hauv lossis ua rau lub roj teeb luv luv. Piv txwv li, portable gas detectors siv nyob rau hauv siab - qhov kub thiab txias ib puag ncig uas siv TFT cov ntxaij vab tshaus yuav tsum tau ntxiv tsim ntawm tshav kub dissipation qauv, nce cov khoom ntim thiab hnyav.
4, Kev ntseeg siab thiab kev ua neej nyob: zais kev txhawj xeeb rau kev siv sijhawm ntev -
Cov cuab yeej cuab tam feem ntau yuav tsum tau ua haujlwm tsis tu ncua rau ntau xyoo lossis ntau xyoo, thiab lub neej ntev thiab kev ntseeg siab ntawm TFT cov ntxaij vab tshaus muaj qhov tsis zoo hauv qab no:
Lub neej backlight yog txwv: LED backlight lub neej ntawm TFT cov ntxaij vab tshaus feem ntau yog 30000-50000 teev, qis dua 100000 teev ntawm segmented LCD. Hauv cov cuab yeej saib xyuas kev lag luam uas ua haujlwm 24 teev hauv ib hnub, lub teeb rov qab yuav tsum tau hloov txhua 3-5 xyoos, nce nqi kho.
Kev laus ntawm cov ntaub ntawv siv lead ua kua: Tom qab siv sijhawm ntev -, kev npaj ntawm cov kua siv lead ua kua molecules yuav raug hloov pauv tsis tau, ua rau cov xim cam lossis txo qhov sib piv ntawm cov zaub. Piv txwv li, tom qab siv tas li rau 5 xyoos, TFT npo ntawm kev saib xyuas kev kho mob yuav muaj xim daj sib txawv, uas cuam tshuam rau qhov tseeb ntawm kev kuaj mob.
Mechanical fragility: Cov iav substrate thiab nyias zaj duab xis qauv ntawm TFT cov ntxaij vab tshaus yog qhov cuam tshuam rau kev puas tsuaj, thiab nyob rau hauv cov xwm txheej uas muaj zog vibrations (xws li engineering machinery instruments), qhov tsis ua hauj lwm tus nqi yog ntau dua li cov neeg kho tshuab pointers los yog segment code screens.
