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Ntsiab Cai ntawm TFT-LCD

Nov 17, 2017

1. Kev paub txog thiab cov khoom ntawm lub cev kua muaj zog


1.1 kev paub txog cov kua ua kua

Nyob rau hauv lub xwm, feem ntau cov ntaub ntawv hloov nrog kub tsuas yog nyob rau hauv peb lub xeev: khoom xeev, kua xeev thiab gaseous xeev.

Cov dej siv lead ua kua (kua siv lead ua kua) yog ib yam khoom siv tshiab uas txawv ntawm cov khoom siv li niaj zaus, cov kua thiab lub xeev loj, Nws yog cov khoom siv ntawm cov kua thiab siv lead ua hauv qhov kub thiab txias. Nws tseem hu ua kua crystal theem los yog theem nrab, yog li ntawd nws tseem hu ua plaub lub xeev cov teeb meem. Cov kua siv lead ua kua yog xub pom los ntawm Leni FM, tus botanist hauv Austria hauv 1888 (F.Reinitzer).

Cov kua siv ua kua yog cov organic compound nrog lub cev ntawm molecular kev sib kho ntawm cov khoom siv thiab kua siv ua kua, feem ntau feem ntau siv los ua kua dej nematic (nematic), molecular shape yog rhawv pas duab, ntev thiab dav yog li 1 txog 1 , nyob rau hauv txawv teb tam sim no, cov kua siv lead ua kua molecules yuav ua li niaj zaus kev sib hloov ntawm 90 DEG uake. Muaj qhov sib txawv ntawm qhov sib txawv, ces lub hwj huam tawm tau muab qhib thiab muab tua (ON / OFF) thaum qhov sib txawv ntawm lub teeb thiab ntxoov ntxoo, thiab kev tswj hwm ntawm txhua tus pixel, muaj peev xwm tsim tau ib yam duab. Muaj ntau ntau hom kua muaj kua, thiab muaj ntau hom phom muaj kua ntxhiab nyob hauv cov khoom lossis hluavtaws. Txawm li cas los, los ntawm qhov muaj pes tsawg leeg thiab lub cev nqaij daim tawv ntawm cov kua dej ua kua, cov kua nplaum yuav raug cais ua ob pawg: thermotropic kua crystals thiab lyotropic kua crystals.

Qee cov organic tebchaw yog rhuab thiab yaj, thiab kua kua nplaum tsim los ntawm kev puas tsuaj ntawm crystalline lattices los ntawm cua sov yog hu ua thermotropic kua crystals, uas yog cov kua muaj zog vim yog hloov qhov kub. Qee cov organic tebchaw tau muab tso rau hauv qee cov kuab tshuaj,

Cov kua siv lead ua los ntawm kev puas tsuaj ntawm cov kab uas siv lead ua los ntawm hnyav yog hu ua lyotropic kua Crystal. Nws yog cov kua qaub ua kua rau ntawm qhov kev hloov ntawm cov khoom siv ua kua, xws li xab npum hauv cov cua ua si los ntawm cov menyuam yaus, uas yog cov piv txwv ntau lyotropic kua muaj zog. Feem ntau cov kua crystalline cov ntaub ntawv tam sim no siv rau cov zaub yog thermotropic kua crystals.


1.2 Cov khoom ntawm cov dej ua kua

Cov kua nplaum ua kua yog cov khoom ntim ntawm cov qwj phom molecules, disk molecules, thiab lwm yam khoom xyaw uas tsis muaj ntsej muag kheej.

Nws txawv ntawm qhuav molecules nyob rau hauv kev npaj tag disordered isotropic kua, thiab kuj teem caij zoo kawg nkaus cov nplais ntawm tsis qhuav molecules.

Txoj kev kho molecular ntawm cov siv lead ua thiab cov kua thiab qhov tshwj xeeb cov khoom thiab cov khoom ntawm cov roj ntsha ua rau cov kua siv lead ua kua thiab ntau txoj hauv kev ntawm cov kua siv lead ua kua. Ntawm qhov one hand, cov kua muaj kua muaj dej ntws zoo txaus; ntawm qhov tod tes, cov kua pleev nplaum muaj cov pa roj anisotropy, nrog rau cov khoom siv dielectric, sib nqus polarization, qhov muag kho qhov muag tsis pom thiab lwm yam kev pom zoo.

Cov txheej txheem kom raug ntawm cov kua siv lead ua kua molecules kuj ua rau cov kua siv lead ua kua zoo ib yam li cov siv lead ua thiab tuaj yeem tiv thaiv kev ntxhov siab uas cuam tshuam qhov kev txiav txim no. Uas yog hais, kua muaju muaj shear modulus ntawm elasticity.

Nyob rau hauv cov ntaub ntawv siv, tus mobility ntawm cov kua kua, cov anisotropy ntawm dielectric thiab kho qhov muag, thiab elasticity cov kua muaju kua tseem ceeb. Lawv tuaj yeem tswj cov ciaj ciam ntawm cov kua siv lead ua kua. Cov khoom siv ua kua muaj ntau yam tsis muaj kev txawj ntse, tsis suav tsis kho, thiab lub cev tsis ua haujlwm, lub dielectric anisotropy ntawm delta 6, lub cev, lub qhov rooj viscosity, elastic constants ntawm K, T m TC theem hloov cov xim, resistivity thiab kua Crystal P.

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