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Tus qauv thiab kev npaj ntawm TFT kua Crystal kua

Jun 14, 2018

Cov yam ntxwv ntawm TFT

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Lub sijhawm ua haujlwm ntawm TFT keeb image.png

Lub sijhawm TFT muab qhov tsim nyog qhov chaw ntawm lub qhov rooj (G) (VGS> qhov chaw pib qhov hluav taws xob Vth).

Channel (a-Si) induces electrons ua rau lub qhov (S) ntws (D) tig.

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Lub caij 1.TFT muab qhov tsim nyog qhov chaw ntawm lub qhov rooj (G). Thaum VGS qes dua qhov pib qhov teeb meem, cov cab kuj tsis yog vim li cas, thiab cov channel ua ib qhov kev sib tsuam hluav taws xob.

2., lub npov TFT pom tau tias yog hloov, thaum VGS> Vth ON,

Thaum VGS

Cov txheej txheem ntawm 4.2.3 TFT-LCD

Lub rooj vag G ntawm TFT txuas nrog lub tshuab hluav taws xob, qhov chaw S yog txuas nrog lub teeb liab, qhov tso dej D yog txuas nrog ITO pixel electrode, thiab txuas nrog lub LCD pixel hauv koob.

Ib qho kev zoo siab ntxiv rau lub qhov rooj ntawm TFT los ntawm kab los ntawm kab, kom lub TFT ntawm txoj kab yog ib txhi tau sib txuas lus, thiab cov duab kos tau tshwm rau ntawm cov kab sib txawv raug xa mus rau txhua lub teeb liab kom paub cov kua siv lead ua kua . Qhov teeb meem ntawm qhov hluav taws xob yog muab rau ntawm pixel capacitance thiab kev cia ua daim ntawv tso cai.

Tom qab cov teeb liab ntawm lub voj voog tas lawm, lub TFT yuav kaw thiab qhov teeb liab ntawm qhov hluav taws xob yuav khaws thiab tsav cov pixel kua Crystal tsis tu ncua kom txog thaum lub sab nrauv scan teeb liab tuaj txog.

Lub TFT ntawm lwm cov kev ua txhaum BOC yog ib txwm nyob hauv ib lub sijhawm kaw.

Nws tuaj yeem pom tias lub teeb liab ntawm lub luam tawm tsuas yog ntxiv rau lub rooj vag ntawm TFT thiab plays lub luag haujlwm ntawm qhov chaw nyob pixel chav los ntawm kev tswj cov kev sib txuas ntawm TFT, thiab cov duab kos uas tsav cov kua siv lead ua kua yog muab rau ob capacitors thiab tsim ntawm pixel hluav taws xob circuits. OD thiab pej xeem electrodes tsiv TFT rau pixel capacitance thiab cia lub peev xwm tom qab them tas. Qhov loj ntawm qhov sib txawv txiav txim siab qhov siab ntawm qhov voltage uas tsav lub LCD.

Cov hom zaub ntawm TFT LCD

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Thaum thawj kab ntawv kab ntawv kis tau ntxiv rau lub teeb liab, tag nrho cov TFT ntawm thawj kab pib ua lub xeev (lub txheej xwm pib hloov los ntawm cov qhabnias kev ntaus nqi mus rau lub tshuab coj los ua tus electrons uas yuav txav mus tau dawb), yog li ntawd cov cov ntaub ntawv kab ntxiv rau cov teeb meem ntawm cov ntaub ntawv (cov dawb tsiv electrons txav raws li cov kev taw qhia hluav taws xob los ua kom tiav tam sim no), thiab cov pixel ntxiv rau pixel los ntawm TFT. Capacitors thiab cov neeg ua haujlwm (storage capacitors) yuav raug them los ntawm lawv qhov teebmeem ntawm cov ntaub ntawv.

Thaum kev xa cov kab txuas ntxiv tom ntej, tag nrho cov pixels tau xaiv los ntawm thawj lub rooj vag kab yuav raug txiav tawm ntawm cov ntaub ntawv kab. Nws yog tswj los ntawm pixel capacitance thiab lub peev xwm cia, thiab qhov seem uas them tau muab khaws cia rau qhov kawg ntawm cov kab kawg ntawm daim duab. Rov qab ua li qub ntxiv thiab ua tiav 1 txoj kab tsheb.

1. kab kab electrode kab los ntawm kab xaiv

2. Cov lus ceeb toom uas siv rau sab electrode rau tib lub sijhawm

3.Tag cua voltage yog siv los ua kua siv ua kua pixel pc capacitance thiab lub peev xwm ntawm lub cev

4..Lawv lub capacitor paug txij nkawm zaub

5.Yog ua tiav ntawm tus ncej, rov hais dua cov txheej txheem saum toj no

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Cov ntawv rau TFT:

Qhov zoo zaub yuav tsum qhib qhov tam sim no ntawm TFT kom siab li sai tau thiab lub xeev tawm tam sim no kom tsawg li sai tau.

Ntau dua kev sib piv, feem ntau yog 105.

Yuav kom phim lub peripheral circuits tsav tsheb hauv LCD, qhov tsav tsheb ntawm qhov-Si: H TFT yuav tsum tsawg dua 15V.

Lub polarity ntawm lub rooj vag tsis tuaj yeem hloov tsis tau thaum polarity ntawm lub npav ntawm lub npav hloov ib zaug, tab sis cov yam ntxwv tso tawm ntawm lub npov TFT yog txawv tom qab txawv polarity voltages ntxiv. Cov tshuaj no tsuas yog siv ntau qhov sib txawv los yog paab ntxiv qhov sib npaug ntawm qhov tseeb.

Qhov kev hloov ntawm TFT yuav tsum muaj peev xwm ua kom tau raws li qhov xav tau ntawm daim duab, uas yog, tam sim no nce tawm ntawm lub xeev tawm mus rau lub xeev yuav tsum yog ntxhab.

TFT yuav tsum muaj ib qho kev tsim txoj kab channel loj piv ntawm W / L.

TFT-LCD's tsis tseem ceeb rau Array

1. tseem ceeb heev voltage: Vth

2. kev sib txuas lus hluav taws xob: UN

3. Ion / Ioff

4. qhib tus nqi (Aperture Ratio)

(1) TFT; (2) rooj vag & txheej; (3) Cst;

(4) qhov yuam kev ntawm qhov siab thiab qis sab substrates; (5) Kev Lees Paub ntawm LC

5. DC Voltage Offset

6. ncua sij hawm qeeb thiab muaj kev cuam tshuam hauv lub teeb meem kis (Distortion)

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