Tom qab txhua lub vijtsam ntawm cov khoom siv uas peb cuam tshuam nrog txhua hnub—xws li xov tooj ntawm tes, khoos phis tawj, thiab smartwatches—muaj ib qho thev naus laus zis tseem ceeb: TFT. Tej zaum nws yuav zoo li tsis paub, tab sis nws yog "tus thawj coj tseem ceeb" uas ua rau cov zaub niaj hnub no qhia tau cov duab meej thiab du. Yog li, TFT hauv TFT LCD screens yog dab tsi? Nws muaj lub khawv koob dab tsi uas tsis tshua paub?
I. Lub Ntsiab Lus Tseem Ceeb ntawm TFT: Kev Sib Koom Tes Tseeb ntawm Ntau Lab "Microscopic Switches" ntawm Lub Screen
TFT, luv rau Thin-Film Transistor, yog hu ua thin-film transistor. Koj tuaj yeem xav txog nws zoo li lub qhov hloov hluav taws xob me me heev ntawm lub vijtsam. Lub ntsiab lus tseem ceeb yog tias qhov peb feem ntau hu ua TFT yeej tsis muaj nyob ib leeg. Hauv txhua qhov hu ua "TFT screen" (piv txwv li, TFT-LCD), muaj ntau yam TFTs - suav nrog ntau lab lossis txawm tias kaum lab ntawm cov micro-switches no, teeb tsa zoo nkauj rau ntawm lub khob iav. Txhua TFT tswj hwm ib qho pixel thIb qho piv txwv yooj yim: Yog tias txhua lub pixel ntawm lub vijtsam piv rau lub qhov rais, ces TFT hauv lub vijtsam TFT LCD yog lub qhov hloov ntse uas tswj qib uas lub qhov rais ntawd qhib lossis kaw. Nws txiav txim siab meej tias lub teeb (los ntawm lub backlight module) tuaj yeem hla dhau ntau npaum li cas, thaum kawg txhais qhov ci thiab xim ntawm lub pixel ntawd. Kev ua haujlwm sib koom tes ntawm ntau lub TFTs ua ke tsim cov duab tiav uas peb pom ua ntej peb lub qhov muag.
II. Lub Hauv Paus ntawm Khawv Koob: Los ntawm "Passive" mus rau "Active," Kev Ua Haujlwm Hloov Pauv ntawm TFT
Qhov khawv koob tiag tiag ntawm TFT yog nyob rau hauv nws qhov kev paub txog txoj kev tswj hwm tshiab: "active matrix addressing." Qhov no yog lub ntiaj teb sib nrug ntawm cov thev naus laus zis "passive matrix" uas tsis zoo uas muaj ua ntej TFT.
Qhov Teeb Meem Tsis Muaj TFT (Passive Matrix):
Nws zoo li siv ib daim phiaj ntawm cov kab sib tshuam los tswj txhua lub pixels, uas tsis ua haujlwm zoo thiab yooj yim rau kev sib txuas lus thiab kev txav tsis meej.
Kev Txawj Ntse Nrog TFT (Active Matrix):
Txhua lub pixel muaj nws tus kheej lub TFT hloov. Thaum ib lub pixel xav tau tsav, lub teeb liab tswj tau qhov chaw thiab hais kom lub pixel TFT "qhib" lossis "kaw", tswj nws lub xeev kom txog thaum rov ua dua tshiab tom ntej. Qhov no coj cov txiaj ntsig hauv qab no:
Teb Sai: Cov hloov pauv TFT ua haujlwm ntawm qhov ceev heev, txo qhov kev txav tsis meej hauv cov duab dynamic ntawm TFT LCD cov ntxaij vab tshaus.
Kev Siv Hluav Taws Xob Tsawg Dua: Tus yam ntxwv ntawm lub xeev-tuav txo qhov kev siv hluav taws xob tag nrho ntawm TFT LCD cov ntxaij vab tshaus.
III. Kev Tshem Tawm Qhov Dab Neeg: TFT ≠ Ib Hom Screen; Nws Yog "Lub Hlwb Hauv Qab" ntawm Lub Screen
Ib qho kev nkag siab yuam kev feem ntau yog hais tias "TFT yog ib hom screen." Qhov tseeb, TFT nws tus kheej tsis tso tawm lub teeb lossis tsim xim. Nws yog ib qho system tswj hwm zoo heev - "lub cockpit hauv qab" lossis "lub hlwb tseem ceeb" ntawm lub screen.
Lub vijtsam TFT-LCD, uas peb paub zoo tshaj plaws, yog qhov kev daws teeb meem thev naus laus zis ua tiav. Hauv qhov no, TFT array hauv TFT LCD screen yog lub luag haujlwm rau kev tsav tsheb kom raug qhov sib phim ntawm cov kua siv lead ua kua kom tswj tau qhov kev hla ntawm lub teeb los ntawm lub backlight. Txawm tias nyob rau hauv cov ntxaij vab tshaus OLED siab dua, thaum tsim cov khoom loj lossis cov khoom daws teeb meem siab, TFT array tseem xav tau ua lub voj voog backplane kom raug tswj qhov kev tso tawm ntawm txhua lub OLED pixel. Nws tuaj yeem hais tias yog tsis muaj TFT technology, cov zaub TFT LCD uas muaj kev txhais siab, du uas peb pom niaj hnub no yuav tsis muaj nyob.
IV. Kev Hloov Pauv ntawm Tsev Neeg TFT: Kev Tsim Kho Khoom Siv Tsav Tsheb Ua Kom Muaj Kev Ua Tau Zoo
Kev ua tau zoo ntawm TFT feem ntau nyob ntawm cov khoom siv semiconductor siv hauv nws cov khoom tsim. Nws keeb kwm kev hloov pauv yog kev taug kev ntawm kev tsim kho tshiab ntawm cov khoom siv:
Amorphous Silicon (a-Si): Thawj lub tshuab TFT tseem ceeb, nrog rau qhov zoo ntawm tus nqi tab sis kev ua tau zoo tsawg, ua rau nws nyuaj rau ua kom tau raws li qhov xav tau ntawm cov zaub siab.
Low-Temperature Polycrystalline Silicon (LTPS): Kev ua tau zoo heev, nrog rau kev txav mus los ntawm hluav taws xob siab, ua rau cov ntxaij vab tshaus siv hluav taws xob tau zoo dua thiab teb tau sai dua. Siv dav hauv cov ntxaij vab tshaus LCD thiab OLED zoo heev.
Hauv kev xaus lus, lub khawv koob ntawm TFT hauv TFT LCD cov ntxaij vab tshaus yog nws lub peev xwm los hloov cov teeb liab hluav taws xob tsis sib haum xeeb mus rau hauv cov duab digital uas tuaj yeem tswj tau nrog qhov tseeb ntawm pixel. Nws yog tus kws ua haujlwm tsis paub meej, meej zais hauv qab lub vaj huam sib luag iav. Nws yog txoj haujlwm sib koom tes ntawm ntau lab tus TFT micro-switches uas thaum kawg coj peb lub ntiaj teb pom digital meej heev, ci ntsa iab, thiab du ua ntej peb lub qhov muag. Kev nkag siab txog TFT hauv TFT LCD cov ntxaij vab tshaus txhais tau tias nkag siab txog lub hauv paus ntawm cov thev naus laus zis niaj hnub no.
Lub sijhawm tshaj tawm: Lub Kaum Hli-22-2025