Tsev > Xov xwm > Ntsiab lus

Cov Hom Nyob Hauv Cov Dej Ua Kua Cov Pob Kws Siv Rau Hauv Cov Khaub Ncaws (LCOS)

Nov 25, 2017

1. kev faib tawm sab nraud

LCOS Cov qauv ntawm kev xaiv tau muab faib ua ob pawg, Cov NW thiab NB tso tawm hom xws li NW:

Mixed twisted nematic qauv (MTN)

Court them nqi sib ntswg nematic hom (SCTN)

Sib txheeb tau ib qho kev sib txuas ntawm electronically (TN- ECB)

Kev tswj fais fab ib tus qauv dawb tas (ECB - NW);

NB zaub hom

Muaj xws li: xyaw cov nyhuv hom (HFE)

Reflective twisted nematic hom (RTN)

Vertical array hom (VA)

Hluav taws xob tswj tus kheej lub cev hom kab mob (ECB-NB)

Nws yog tsim nyog, tsis muaj teeb meem li cas hom kua siv lead ua zaub hom tsim tsis yog tib yam, namely kua siv lead ua ntswj lub psi, qhov kev taw qhia ntawm qhov teeb meem polarized lub teeb thiab nyob ze ntawm lub kua siv lead ua lub ntsej muag orientation angle beta thiab optical retardation ntawm delta lambda ngd /. Cov qauv no tsis siv rau daim ntawv txhawm nyiaj, tsis peb (PSI, beta, delta lambda ngd /) daim ntawv, xam raws li lub caij nyoog ntawm 550nm wavelength. Peb yuav qhia lawv raws li cov lus sib lawv li kev tawm ntawm lub xeev qub thiab qub dub.


Qhov zoo sib xws ntawm MTN hom thiab hom TN hom yog qhov sib npaug zoo siab, qis dispersion thiab tsis tsav tsheb tsawg. Qhov sib txawv nyob rau hauv kev pom qeeb qis qis, lub qhov ntsej beta thiab lub qhov muag pom dav. Txoj kev sib nrauj ntawm MTN hom qis dua 90 degree, thiab kev tsav tsheb thiab kev ywj pheej yau nrog qhov nce ntawm txoj kab sib tw.



2.Qhov tso tawm hom zaub

Lolus LCOS cov xim xim, thiab qhov kev sib tw tsav yog hloov tib lub sijhawm, txhawm rau tswj kom muaj xim zoo, tib lub sij hawm thiaj li ua rau RGB peb thawj xim siv tau tib lub LCOS, peb yuav tsum xim kom deb li deb tshaj li 90 DEG MTN (90 DEG, 20 DEG, 0.25) yog kev xaiv zoo, txawm hais tias polarization xeev 90 conversion rate yog qhov qis, tab sis ciam txheej ib leeg rau ib leeg, qhib lub xeev theem sib them rau lwm tus , yog li lub xeev dub tsav tsheb muaj zog tsawg, tuaj yeem pom zoo sib xws Daim duab 1 qhia tau hais tias qhov kev ntsuam xyuas ntawm 90 ntawm MTG, lub teeb ci teeb yog lub teeb dawb, los ntawm qhov kev hloov tshiab ntawm photoletrical yog muab tag nrho electro-optical zog peb lub thawj xim RGB wavelength ntawm no tsav qis ntawm tus cwj pwm electro-qhov muag cwj pwm yog lub hauv paus ntawm gamma kho LCOS tswj kev sib cog lus, thaum kev hloov cov polarization efficiency tsawg, tab sis qhov kev txawv ntawm qhov txawv ntawm lub xeev RGB mary xim tsis yog neeg pluag, qhov no Nws yog heev pab rau ib nti zaub.

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SCTN (60 ° , 30 ° , 0.35) tus kheej cov yam ntxwv ntawm kev sib tw ntawm hom nistatic tawm ntawm lub xeev qhov xeev qhov hluav taws xob qis dispersion loj heev, daim duab 2 qhia qhov simulation rau peb nti electro-optic nkhaus projection zaub, cov qauv no yog tsim rau RGB peb qib xim xaiv ntau yam kho qhov muag anisotropy, liab lub teeb, xiav lub teeb yam tsawg kawg uas koj tuaj yeem tau tawm hauv lub xeev, muaj kev cuam tshuam zoo dua lub zog ntawm lub xeev lub hauv ntej ntawm SCTN substrates loj dua, txoj kev sib tw ntawm kev sib txawv ntawm qhov feem ntau ntawm MTN ntawm qhov no, (70 ° , 30 ° , 0.31) npaj siab, qhov qauv no yog qhov kev txhim kho ntawm SCTN dispersion yuav zoo me ntsis zoo tshaj 60 ° .

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TN- ECB (63.6 ° , 0 ° , 0.192) muaj qhov siab tshaj tawm ntawm lub xeev, kev sib tw tsis tshua muaj siab, lub qhov muag dav dav ntawm lub thawv ntawv thiab cov lus teb zoo sij hawm yog qhov point ntawm hom no.


Vim tias tsis muaj kev them nyiaj rau tus kheej, lub kua siv lead ua kua molecules rau ntawm tus ciam teb yog qhov nyuaj rau kev tsav, kom lub xeev qhov hluav taws xob siab ECB-NW (0 ° , 45 ° , 0.14) tsuas yog siv tus qauv tswj fwm ib qho me me, muaj kev cuam tshuam thiab ceev teb, tab sis vim yog qhov kev sib tw tsav tsheb siab heev thiab tsis zoo sib txawv li 5V raws li qhia hauv daim duab 3.

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3.Nyob rau kev pom ntawm hom zaub dub

HFE (45 °, 0 °, 0.53) hom nyob ze rau RTN (54 °, 0 °, 0.52). Qhov kev piv txwv ntawm RTN rau HFE yog kwv yees li 7% dua, xim nrum, tuab qhov dav dav, qhov sib piv zoo heev, ob lub yeeb yam pom muaj qhov zoo ntawm kev tsav tsheb tsis tshua muaj zog, tab sis vim yog ncua sijhawm ntau dhau lawm, ntev me ntsis lub sij hawm teb. Nws tuaj yeem pom los ntawm daim duab 4 tias qhov kev xav tau ntawm RGB peb thawj xim tsis yog synchronized nrog lub nkhaus voltage variation, uas yog tsis haum rau ib nti zaub.

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VA (0 °, 45 °, 0.25λ-0.5λ) kua crystal molecules perpendicular to substrate direction, anti parallel txhuam no hom muaj tuab lub thawv dav ntau ntawm siab sib npaug thiab tsis dispersion yam ntxwv zoo, tab sis piv rau HFE thiab RTN ob hom, qhov tsav tsheb qhov hluav taws xob tau nce, raws li qhia hauv daim duab 5.

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Daim duab 6 qhia tau hais tias hom kab dub feem sib npaug sib npaug ntawm tus qauv ECB - NB (0 °, 45 °, 0.27). Cov kev xav tau siab heev, kev tsav tsheb muaj tsawg dua li HFE thiab RTN, tiam sis cov dispersion yog loj heev, qhov sib txawv ntawm qhov sib txawv, thiab qhov teebmeem photoelectric zoo heev cuam tshuam los ntawm lub thawv tuab.