LCD thev naus laus zis yog sau cov kua siv lead ua kua ntawm ob kab ntawm cov grooves me. Cov grooves ntawm ob lub dav hlau no yog perpendicular rau ib leeg (kev sib tshuam ntawm 90 degrees). Hauv lwm lo lus, yog tias cov molecules ntawm ib lub dav hlau sib haum rau sab qaum teb-sab qab teb, cov molecules ntawm lwm lub dav hlau yog nyob rau sab hnub tuaj-sab hnub poob, thiab cov molecules ntawm ob lub dav hlau raug yuam mus rau hauv 90-degree twisted xeev. Vim hais tias lub teeb ntws raws cov kev taw qhia ntawm molecular kev npaj, lub teeb kuj hloov pauv 90 degrees thaum nws dhau los ntawm cov kua siv lead ua kua. Tab sis thaum ib qho hluav taws xob siv rau cov kua siv lead ua kua, cov molecules yuav rov teem dua ntsug, kom lub teeb tuaj yeem raug coj tawm yam tsis muaj kev sib tw.
LCD cia siab rau cov lim polarization (phaj) thiab lub teeb nws tus kheej. Lub teeb ntuj diverges random ib ncig. Lub tshuab lim polarization yog qhov ua tau zoo ntawm cov kab sib txuas ntau dua. Cov kab no tsim ib lub vas, thaiv txhua lub teeb uas tsis sib xws 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 lub teeb polarized. Tsuas yog thaum cov kab ntawm ob lub lim dej yog tib yam nkaus xwb, lossis lub teeb nws tus kheej tau sib tw kom phim lub lim dej thib ob, lub teeb tuaj yeem nkag mus.
LCD yog tsim los ntawm ob lub polarizing cov ntxaij lim dej uas yog perpendicular rau ib leeg, yog li nyob rau hauv ib txwm muaj xwm txheej, txhua lub teeb uas sim nkag mus yuav tsum raug thaiv. Txawm li cas los xij, vim tias cov kua siv lead ua kua distorted tau ntim ntawm ob lub lim dej, tom qab lub teeb dhau los ntawm thawj lim, nws yuav hloov los ntawm cov kua siv lead ua kua molecules 90 degrees, thiab thaum kawg dhau los ntawm cov lim thib ob. Ntawm qhov tod tes, yog tias qhov hluav taws xob tau siv rau cov kua siv lead ua kua, cov molecules yuav rov zoo thiab ua tib yam nkaus, kom lub teeb yuav tsis hloov lawm, yog li nws tshwm sim los ntawm cov lim thib ob. Hauv luv luv, lub zog siv los thaiv lub teeb, thiab tsis muaj lub zog siv los ua kom lub teeb tawm.
Txawm li cas los xij, nws tuaj yeem hloov kho 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. Txawm li cas los xij, vim tias lub khoos phis tawj yuav luag txhua lub sijhawm, tsuas yog kev daws teeb meem ntawm" powering on thiab thaiv lub teeb" tuaj yeem ua tiav lub hom phiaj txuag hluav taws xob tshaj plaws.
Los ntawm qhov kev xav ntawm kev tsim kho lub hauv paus ntsiab lus ntawm LCD npo zaub, txawm tias nws yog lub khoos phis tawj lossis lub desktop, lub vijtsam LCD tau txais yuav yog cov txheej txheem txheej txheej sib txawv. Lub LCD yog tsim los ntawm ob daim iav, txog 1 hli tuab, sib cais los ntawm qhov nruab nrab ntawm 5um uas muaj cov khoom siv lead ua kua (LC). Txij li cov khoom siv ua kua siv lead ua nws tus kheej tsis tawm lub teeb, muaj lub teeb lub teeb raws li lub teeb ci ntawm ob sab ntawm lub vijtsam, thiab muaj lub teeb pom kev zoo (lossis txawm tias lub teeb phaj) thiab cov yeeb yaj kiab qhia sab nraum qab ntawm cov kua siv lead ua kua. npo. Backlight phaj yog tsim los ntawm cov khoom siv fluorescent. Muaj peev xwm emit lub teeb, nws lub luag haujlwm tseem ceeb yog muab qhov nruab nrab ntawm lub teeb tom qab. Lub teeb tawm los ntawm lub teeb rov qab nkag mus rau hauv cov kua siv lead ua kua txheej uas muaj ntau txhiab tus tee dej tom qab dhau los ntawm thawj txheej txheej lim dej polarization. Cov kua siv lead ua kua nyob rau hauv cov kua siv lead ua kua yog tag nrho muaj nyob rau hauv cov qauv ntawm tes me me, thiab ib lossis ntau lub hlwb tsim ib pixel ntawm qhov screen. Muaj cov pob tshab electrodes nruab nrab ntawm cov iav phaj thiab cov khoom siv lead ua kua. Cov electrodes tau muab faib ua kab thiab kab. Ntawm cov ntsiab lus sib tshuam ntawm cov kab thiab kab, qhov kev sib hloov kho qhov muag ntawm cov kua siv lead ua kua yog hloov pauv los ntawm kev hloov qhov voltage. Kev ua haujlwm ntawm cov khoom siv lead ua kua zoo ib yam li cov teeb me me. valve. Nyob ib ncig ntawm cov khoom siv ua kua siv lead ua yog cov khoom siv hluav taws xob tswj thiab cov khoom siv hluav taws xob. Thaum cov hluav taws xob hluav taws xob tsim tawm hauv cov hluav taws xob hauv LCD, cov kua siv lead ua kua molecules yuav raug cuam tshuam, yog li ntawd lub teeb dhau los ntawm lawv yuav raug cuam tshuam tsis tu ncua, thiab tom qab ntawd lim los ntawm txheej txheej lim thib ob thiab tso tawm rau ntawm npo.
