Monochrome LCD npo:
LCD thev naus laus zis yog qhov ua tau rau cov kua siv lead ua kua rau hauv ob kab ntawm qhov chaw tiaj tus nrog cov grooves zoo. Cov grooves ntawm ob lub dav hlau no yog perpendicular rau ib leeg (kev sib tshuam ua 90 °). Tom qab ntawd, yog tias cov molecules ntawm ib lub dav hlau tau teeb tsa nyob rau sab qaum teb-sab qab teb, cov molecules ntawm lwm lub dav hlau tau teem rau sab hnub tuaj-sab hnub poob, thiab cov molecules nyob nruab nrab ntawm ob lub dav hlau ncaj qha mus rau hauv lub xeev twisted 90 °. Txij li thaum lub teeb mus raws cov kev taw qhia nyob rau hauv uas lub molecules yog teem, lub teeb yuav tsum tau twisted 90 ° thaum dhau los ntawm cov kua siv lead ua kua. Tab sis thaum peb siv ib qho hluav taws xob rau cov kua siv lead ua kua, cov molecules yuav rov teem dua ntsug kom lub teeb tuaj yeem tawm ncaj qha yam tsis muaj kev sib tw.
LCD yog heev nyob ntawm lub polarization lim (phaj) thiab lub teeb nws tus kheej. Nyob rau hauv kev muaj tiag, ntuj lub teeb diverges random nyob rau hauv tag nrho cov lus qhia. Cov lim polarized 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 uas tau raug polarized. Tsuas yog thaum cov kab ntawm ob lub lim dej yog tib yam nkaus, lossis lub teeb nws tus kheej tau raug twisted kom haum rau ob lub lim dej polarization, lub teeb tuaj yeem nkag mus.
LCD yog tsim los ntawm ob lub lim dej polarized uas nyob 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 muaj ntau cov kua dej sib tw ntawm ob lub lim dej, tom qab lub teeb tiav dhau los ntawm thawj lim, nws yuav raug yuam kom tig 90 degrees los ntawm cov kua siv lead ua kua molecules, thiab thaum kawg lim los ntawm qhov thib ob. Tawm ntawm cov khoom siv kho qhov muag. Ntawm qhov tod tes, yog tias ib qho hluav taws xob tau siv rau cov kua siv lead ua kua, cov molecules yuav rov ua dua thiab sib npaug tag nrho, yog li ntawd lub teeb yuav tsis raug twist lawm, yog li nws tshwm sim los ntawm cov lim thib ob. Nyob rau hauv tag nrho, lub hwj chim on yuav thaiv lub teeb, thiab tsis muaj hwj chim rau yuav ua rau lub teeb dim.
Txawm li cas los xij, qhov kev npaj ntawm cov kua muaju hauv LCD tuaj yeem hloov pauv 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 ntawm lub khoos phis tawj yuav luag txhua lub sijhawm, tsuas yog kev daws teeb meem ntawm" powering on thiab thaiv lub teeb" Thaum kawg tuaj yeem ua tiav lub hom phiaj txuag hluav taws xob tshaj plaws.
Los ntawm qhov kev xav ntawm lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm LCD npo zaub, txawm tias nws yog lub khoos phis tawj lossis lub khoos phis tawj, lub vijtsam LCD siv tiag tiag yog cov txheej txheem txheej txheej sib txawv. Lub LCD yog tsim los ntawm ob lub iav phaj nrog lub thickness ntawm txog 1 hli. Ob lub iav phaj yog sib cais los ntawm ib lub sij hawm tsis sib xws ntawm 5um uas muaj cov khoom siv lead ua kua (LC). Vim tias cov khoom siv ua kua siv lead ua nws tus kheej tsis tawm lub teeb, yuav muaj teeb ci raws li lub teeb ci ntawm ob sab ntawm lub vijtsam zaub, thiab nyob rau sab nraum qab ntawm cov kua siv lead ua kua muaj lub phaj teeb (tseem hu ua homogenizing phaj), ib tug reflective zaj duab xis, thiab ib tug backlight phaj. Nws yog tsim los ntawm cov khoom siv fluorescent thiab tuaj yeem tawm lub teeb. Nws lub luag haujlwm tseem ceeb yog muab lub teeb pom kev zoo sib xws hauv qab. Lub teeb tawm los ntawm lub teeb rov qab yuav 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 polarizing. Cov kua siv lead ua kua 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 tuaj yeem tsim lub pixel ntawm lub vijtsam. Nruab nrab ntawm cov iav phaj thiab cov khoom siv lead ua kua yog pob tshab electrode. Cov electrode feem ntau muab faib ua kab thiab kab. Ntawm qhov kev sib tshuam ntawm cov kab thiab kab, qhov kho qhov muag hloov lub xeev ntawm cov kua siv lead ua kua tuaj yeem hloov pauv los ntawm kev hloov qhov voltage. Kev ua haujlwm ntawm cov khoom siv ua kua siv lead ua zoo ib yam li A lub teeb me me. Nyob rau hauv periphery ntawm cov khoom siv lead ua kua yog cov tswj Circuit Court thiab tsav Circuit Court ib feem. Thaum cov electrodes hauv LCD tsim hluav taws xob, cov kua siv lead ua kua molecules yuav twisted, yog li ntawd lub teeb dhau los ntawm nws yuav ua rau muaj kev cuam tshuam tsis tu ncua, thiab tom qab ntawd nws yuav raug lim los ntawm txheej lim thib ob kom tshwm sim ntawm qhov screen.
