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Nyias Zaj duab xis Transistor Kua Crystal zaub

May 05, 2017

Ib tug nyias-zaj duab xis-transistor kua-siv lead ua zaub (TFT LCD) yog ib tug variant ntawm ib tug kua-siv lead ua zaub (LCD) uas siv nyias-zaj duab xis transistor (TFT) technology los mus txhim kho cov duab zoo xws li addressability thiab sib piv. Ib tug TFT LCD yog ib tug active-matrix LCD, nyob rau hauv sib piv rau passive-matrix LCDs los yog yooj yim, qhov ncaj xwb-tsav LCDs nrog ib tug ob peb theem.

TFT LCDs yog siv nyob rau hauv cov khoom siv xws li TV poob lawm , computer saib , txawb tes , handheld video ua si systems, tus kheej cov neeg pab , navigation systems thiab projectors .

TFT LCDs kuj siv nyob rau hauv lub tsheb   instrument pawg vim hais tias lawv tso cai rau tus neeg tsav tsheb los customize cov pawg, raws li zoo raws li muaj peev xwm muab ib tug skeuomorphic , analog -like zaub nrog cov ntsiab.

Ntse yees xim TFT LCD qhia nyob rau hauv 1986. Nyob rau hauv 1988, Ntse pom ib tug 14-nti, active-matrix, tag nrho-xim, full-tsab ntawv tsa suab TFT LCD zaub. Qhov no coj mus rau Nyiv launching ib tug LCD kev lag luam, uas tsim loj-loj LCD qhia, xws li TFT computer saib thiab LCD TV . Nyob rau hauv lub lig Kwvyees li xyoo 1990, cov LCD kev lag luam pib hloov deb ntawm Nyiv, ntawm South Kauslim thiab Taiwan .

Cov kua siv lead ua qhia siv nyob rau hauv cov cav laij leb thiab lwm yam pab kiag li lawm nrog zoo yooj yim qhia tau ncaj-tsav duab hais, thiab yog li ntawd ib tug voltage yuav muab tau yooj yim thov nyob cia li ib ntu ntawm cov qhia xwbpwg nrog rau lwm theem. Qhov no yuav tsum tsis tau yus rau ib tug loj zaub , vim hais tias nws yuav muaj ib tug loj tus naj npawb ntawm (xim) daim duab hais ( pixels ), thiab yog li nws yuav tsum tau tsheej lab ntawm kev sib txuas, ob sab saum toj thiab hauv qab rau txhua tus ntawm peb cov xim (xim liab, ntsuab thiab xiav) ntawm txhua txhua pixel. Kom tsis txhob no qhov teeb meem, lub pixels yog nyob rau hauv kab thiab txhua, kom txhob muaj cov kev twb kev txuas count los ntawm lab down rau txhiab. Cov kem thiab kab nyob ntawm tej xa mus rau transistor keyboards, ib qho rau txhua pixel. Lub ib-txoj kev tam sim no dhau cov yam ntxwv ntawm cov transistor tiv thaiv tus nqi uas yog thov mus rau txhua pixel los yog drained ntawm refreshes mus rau ib tug zaub tus yam ntxwv. Txhua pixel yog ib tug me me capacitor nrog ib tug txheej ntawm insulating kua siv lead ua sandwiched ntawm pob tshab conductive Ito khaubncaws sab nraud povtseg.

Lub Circuit Court layout txheej txheem ntawm ib tug TFT-LCD yog heev uas zoo sib xws rau cov semiconductor khoom. Txawm li cas los, es tsis fabricating cov transistors los ntawm silicon , uas yog tsim rau hauv ib tug crystalline silicon wafer, lawv yog ua los ntawm ib tug nyias zaj duab xis ntawm amorphous silicon uas yog tso rau ib tug iav vaj huam sib luag. Lub pob zeb ntais txheej rau TFT-LCDs yog feem ntau tso siv cov PECVD txheej txheem. Transistors coj li tsuas yog ib tug me me feem ntawm lub cheeb tsam ntawm txhua pixel thiab tus so ntawm lub pob zeb ntais zaj duab xis yog etched mus rau pub lub teeb mus tau yooj yim dhau los ntawm nws.

Polycrystalline silicon yog tej zaum kuj siv nyob rau hauv qhia ntxiv ntau dua TFT kev kawm. Piv txwv li me me high-kev daws teeb meem qhia xws li cov neeg nyob rau hauv projectors los yog viewfinders. Amorphous silicon-raws li TFTs yog nyob deb ntawm cov feem ntau, vim lawv sab ntau lawm nqi, whereas polycrystalline silicon TFTs yog kim thiab ntau npaum li cas yooj yim rau tsim.