Cov kua siv lead ua kua yog cov organic sib xyaw ua ke ntawm cov pas nrig ntev zoo li cov molecules. Nyob rau hauv ib lub xeev ntuj, cov axes ntev ntawm cov pas nrig-puab molecules yog roughly parallel.
Thawj qhov tseem ceeb ntawm lub vijtsam LCD yog tias cov kua siv lead ua kua yuav tsum tau nchuav rau hauv ob lub dav hlau nrog cov grooves zoo kom ua haujlwm zoo. Thiab cov grooves ntawm ob lub dav hlau no yog perpendicular rau ib leeg (kev sib tshuam ntawm 90 degrees), yog li hais tias, yog tias cov molecules ntawm ib lub dav hlau tau teem rau sab qaum teb-sab qab teb, cov molecules ntawm lwm lub dav hlau yog teem rau hauv Eastern-west kev taw qhia thiab nyob rau hauv lub molecules ntawm ob lub dav hlau raug yuam mus rau hauv lub xeev ntawm 90 ° twist. Txij li thaum lub teeb mus raws cov kev taw qhia ntawm molecular kev npaj, lub teeb kuj yuav twisted 90 ° thaum dhau los ntawm cov kua siv lead ua kua. Tab sis thaum ib qho hluav taws xob ntxiv rau cov kua siv lead ua kua, cov molecules yuav rov teem dua ntsug, thiab tom qab ntawd lub teeb tuaj yeem raug coj tawm yam tsis muaj kev sib tw.
Qhov thib ob yam ntxwv ntawm LCD yog tias nws tso siab rau cov lim dej polarized thiab lub teeb nws tus kheej. Lub teeb ntuj feem ntau radiates randomly nyob rau hauv tag nrho cov lus qhia. Polarized cov ntxaij lim dej yog qhov ua tau zoo ntawm cov kab nyias nyias thiab cov kab sib txuas. Cov kab no tsim ib lub vas, thaiv txhua lub teeb uas tsis sib npaug rau cov kab no. Cov kab ntawm cov lim polarization yog raws nraim perpendicular rau thawj tus, yog li nws tuaj yeem thaiv tag nrho cov uas tau raug polarized. Teeb. Tsuas yog thaum cov kab ntawm ob lub lim dej sib npaug tag nrho, lossis lub teeb nws tus kheej tau raug twisted kom haum rau ob lub lim dej polarized, lub teeb tuaj yeem nkag mus.
LCD yog tsim los ntawm ob lub lim dej polarized uas yog perpendicular rau ib leeg, yog li nyob rau hauv ib txwm muaj xwm txheej, nws yuav tsum thaiv txhua lub teeb uas sim nkag mus. Txawm li cas los xij, vim tias muaj ntau cov kua siv lead ua kua nplaum ntawm ob lub lim dej, tom qab lub teeb dhau los ntawm thawj lub lim kom tiav, cov kua siv lead ua kua molecules yuav ntswj nws los ntawm 90 °, thiab thaum kawg dhau los ntawm lub lim thib ob. Tawm ntawm nruab nrab. Ntawm qhov tod tes, yog tias qhov hluav taws xob tau siv rau cov kua siv lead ua kua, cov molecules yuav raug rov kho dua thiab ua tib zoo sib luag, kom lub teeb yuav tsis tig rov qab, yog li nws tshwm sim los ntawm cov lim thib ob. Txhua yam, lub teeb tuaj yeem thaiv tau thaum siv fais fab, thiab lub teeb yuav tawm thaum lub zog tsis siv. Tau kawg, nws kuj tseem tuaj yeem hloov kho cov txheej txheem ntawm cov kua siv lead ua kua hauv LCD, kom lub teeb tawm thaum siv hluav taws xob, tab sis raug thaiv thaum tsis siv hluav taws xob. Tab sis vim tias lub vijtsam LCD yuav luag txhua lub sijhawm, yog li tsuas yog" lub zog rau thaiv lub teeb."
