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Yooj yim paub txog cov kua tshuaj siv ua kua

Yooj yim paub txog cov kua tshuaj siv ua kua

Sep 28, 2017

Yooj yim paub txog cov kua tshuaj siv ua kua

LCD parameter khoom, terminology

Electrooptic nkhaus

Lub nkhaus ntawm lub teeb ntawm lub teeb ntawm LCD hauv qab ntawm cov hluav taws xob.

Qhov cuam tshuam voltage Vth

Tus LCD pom ib nrab luminance hloov sib piv rau 10% ntawm qhov ntau yam sib txawv.

Vatican qhov kev vam meej

Tus LCD pom ib nrab hloov luminance hloov mus rau 90% ntawm qhov ntau yam sib txawv.

lub sij hawm teb

Feem ntau LCDs yuav tsum tso saib cov duab hloov tas li, thiab tib neeg lub qhov muag muaj peev xwm kwv yees txog kaum tawm milliseconds. Yog li ntawd, cov duab ntawm cov duab hloov, tej yam ntawm sab nraud voltage hloov yuav tsum tsis txhob tsawg dua qhov kev ceev no. Lub sij hawm teb los piav txog cov yam ntxwv zoo ntawm cov kua qaub (crystal display) feem ntau yog cim ntawm peb qho:

Tr (nce lub sij hawm): lub sij hawm caij nyoog ntawm ib lub teeb hluav taws xob hluav taws xob sib txawv ntawm 10% ntawm tus nqi khov kho mus txog 90%, feem ntau ntawm 10-100ms.

Tf (tom qab lub sijhawm): lub sij hawm luv ntawm ib qho hluav taws xob-hluav taws xob sib txawv li ntawm 10% ntawm tus nqi khov kho mus txog 90%, feem ntau ntawm 20-200ms.

Td (qhib kev ncua sij hawm): lub sij hawm luv ntawm qhov kev ntsuas pulses uas tau tsav mus rau 10% ntawm cov teeb liab electro-kho qhov muag mus rau tus yees cov nqi, feem ntau yog siv ntau cov milliseconds.

Cov sij hawm ntau yog: Tr, + Tf, thiab peb lub hom phiaj ntawm 2004-2005CSTN yog 250ms.

Rau STN, yam uas txiav txim lub sij hawm teb yog cov viscosity coefficient, lub thawv tuab, lub qhov hloov ntawm lub cev, qhov dielectric qhov chaw thiab cov yam ntxwv ntawm tus kab mob sib kis.

Qhov zoo tshaj plaws ntawm kev ntsawv siab

Kev ntsuas qhov ntsuas hloov electro-optic hloov tau tuaj yeem sawv cev los ntawm qhov sib txig sib luag: y = Vsat / Vth ,. Gamma yog ib qhov tseem ceeb ntawm cov khoom siv ua kua dej rau cov ntaub ntawv loj. Lub sijhawm ze rau 1, qhov ntau ntawm cov ntaub ntawv qhia tawm, thiab cov khoom STN feem ntau yog 1.03-1.07. Nws nyob ntawm cov kev tuav pov hwm (K33 / K11, K33 / K22) thiab dielectric tsis tu ncua (Δε / ε┴).

Hwj chim dissipation tam sim no

Cov seem ntawm LCD qhia txog qhov ntws tam sim no los ntawm lub tshuab thaum nws tshwm. Yog hais tias qhov kev qaug tshuaj raug muab tso rau hauv cov kua siv lead ua kua, qhov ntau ntawm qhov muaj zog thoob tam sim no yuav raug cuam tshuam.

Contrast Cr

Qhov sib piv ntawm lub teeb hloov mus rau lub xeev xaiv ntawm lub kua siv lead ua kua hu ua qhov sib piv. Cov khoom siv kho qhov muag ntawm lub vijtsam, ci ntsa iab, Hawj txawm, thiab yog li ntawm seb qhov khoom kho qhov muag ntawm qhov xwm txheej. Qhov teeb meem lub teeb cuam cuam tshuam nrog thiab tseem mus rau propagate nrog lub sib ncag ntawm cov kua qaub tsim kua hlau molecular txheej tom qab dhau los ntawm lub ncov qaum. Yog li ntawd, qhov kev coj thiab qhov kev xav tau qhov sib txawv ntawm qhov kev ua rau lub thawv polarization pom cov khoom kho qhov muag, uas yog, thiab plays lub luag haujlwm. Qhov tshwj xeeb yuav tsum them rau: qhov kev txiav txim siab n yuav tsum tau raug txo kom tsawg li qhov hloov qhov kub thiab qhov hloov ntawm delta n yuav ua rau muaj kev hloov hauv Hawj. Nyob hauv cov ntawv siv, cov kua muaj zog nrog lub txos siab yuav tsum raug xaiv.

Saib cov yam ntxwv ntawm lub kaum ntse ntse

Lub kaum sab xis pom yog lub kaum sab xis nruab nrab ntawm txoj kev taw qhia thiab qhov tshwm sim ntawm cov khoom cim. Vim tias lub teeb pom kev ntawm LCD los ntawm kev zais thiab kev xav tom qab tso zis muaj feem xyuam, qhov kev saib xyuas yuav ua rau cov xim distortion LCD zoo thiab kev xaav ntawm dhau qhov no, qhov sib txawv nrog cov yam ntxwv ntawm kev hloov ntawm lub kaum sab xis pom yog hu ua cov yam ntxwv. Cov xwm txheej saib ib txwm (qhov zoo tshaj plaws lub kaum sab xis pom) yog 3, 6, 9 thiab 12.

ua haujlwm kub

Cov lus qhia rau cov kua siv lead ua kua tau ua hauj lwm, qhov sov siab (sab nraum zoov), qhov kub kub ntau yuav ncav cuag -35oC-85oC.

Cia txias

Qhov kub ntau uas tsis thim khoom thiab cov khoom siv thiab feem ntau yog hais txog 30oC dua li qhov ntsuas kub.

Directional txhuam (Rubbing)

Yuav kom kho cov kua siv lead ua kua molecules nyob rau hauv ib qho kev coj, cov chaw ntawm lub substrate los yog cov txheej txheem nplhaib yog rubbed nrog lint.

Hlauv lub kaum sab xis (Ua ntej)

Lub kaum sab xis ntawm lub kav ntev coj los ntawm cov kua tshuaj kua tshuaj molecule thiab cov substrate, thiab rau hom khoom STN, lub pob inclination ua ntej ntawm 2o-8o.

Ntsug kaum

Lub kaum sab xis ntawm cov kua siv lead ua kua molecule ntawm ob sab ntawm cov kua siv lead ua lub npov substrate teem rau ntawm qhov chaw.

Ntsiab lus taw qhia

Thaum cov kua siv lead ua kua hloov ntawm cov kua siv lead ua kua rau lub xeev, qhov kub yog pob tshab.

Ntsia Hlau-Suab

Hauv cholesteric kua crystals, qhov kev ncua deb ntawm cov theem taw qhia ntawm qhov axis spiral ntawm lub qhov muag yog sawv cev los ntawm P.

Sau

Hauv cov kua kua, cov cheeb tsam me me ntawm cov kua qaub tsim kua tshuaj yog yuav luag zoo li qub.