Cov kua siv lead ua kua (LCDs) yog ua raws li lub tswv yim ntawm kev tswj lub teeb los ntawm kev tso ib txheej ntawm cov kua siv lead ua kua ntawm ob nplooj ntawv ntawm cov khoom siv polarizing. Cov kua siv lead ua kua yog cov khoom siv uas nthuav tawm anisotropy, uas txhais tau hais tias nws muaj cov khoom siv kho qhov muag sib txawv hauv cov lus qhia sib txawv. Ib qho screen LCD muaj ntau lab pixels, txhua qhov muaj peb subpixels - liab, ntsuab, thiab xiav.
Thaum lub teb hluav taws xob siv rau cov kua siv lead ua kua, nws cov kev taw qhia ntawm anisotropy dlhos nrog lub teb, uas cuam tshuam rau lub polarization ntawm lub teeb dhau los ntawm cov siv lead ua. Los ntawm kev tswj hwm qhov hluav taws xob siv rau txhua pixel, LCD cov ntxaij vab tshaus tuaj yeem tswj cov kev taw qhia ntawm cov kua siv lead ua kua thiab lim cov teeb pom kev zoo.
Txawm li cas los xij, cov kua siv lead ua kua tsis tawm lub teeb rau lawv tus kheej, thiab yog li ntawd, xav tau lub teeb pom kev zoo. Lub backlight yog muab tso rau hauv qab cov kua siv lead ua kua txheej thiab yog lub luag hauj lwm rau illuminating lub screen. Yav dhau los, txias cathode fluorescent teeb (CCFLs) tau siv los ua cov teeb pom kev zoo, tab sis lawv tau hloov los ntawm lub teeb-emitting diodes (LEDs), uas muaj zog ntau dua thiab zoo ib puag ncig.
Cov khoom siv polarizing ntawm cov ntxaij vab tshaus LCD suav nrog txheej txheej ntawm nyias zaj duab xis transistor (TFT) array. TFT array muaj cov transistors uas ua zoo li cov hloov me me, tig rau thiab tawm qhov hluav taws xob siv rau txhua pixel. TFT array yog lub luag haujlwm los muab kev tswj xyuas meej ntawm kev taw qhia ntawm cov kua siv lead ua kua, tso cai rau lub vijtsam tsim ntau lab ntawm cov xim sib txawv thiab ntxoov ntxoo.
Txhua pixel ntawm lub vijtsam LCD tuaj yeem tso saib qhov sib xyaw ntawm cov xim liab, ntsuab, thiab xiav qhov tseem ceeb, uas yog tswj los ntawm cov nyiaj tam sim no ntws mus rau txhua qhov subpixel. Los ntawm kev sib txawv ntawm qhov siv tam sim no, lub vijtsam tuaj yeem tsim ntau yam xim uas yuav luag tsis kawg. Txawm li cas los xij, qhov kev tsim cov xim zoo nkauj no yuav tsum muaj zog thiab ua haujlwm zoo rau kev tsav tsheb.
Ntxiv nrog rau cov duab muaj yeeb yuj, cov ntxaij vab tshaus LCD tuaj yeem tso saib cov ntawv thiab cov duab. Hauv qhov no, lub teeb rov qab muab tag nrho lub teeb pom kev ntawm lub vijtsam, thaum pixels tau xaiv qhib thiab tawm los tsim cov ntawv thiab cov duab. Cov txheej txheem no hu ua raster scanning.
Cov ntxaij vab tshaus LCD yog ua raws li lub hauv paus ntsiab lus ntawm kev tswj cov kev sib raug zoo ntawm cov kua siv lead ua kua los ntawm kev siv hluav taws xob. Los ntawm kev lim cov backlight qhov chaw, txhua pixel tuaj yeem tsim cov xim sib txawv thiab shading. Sophisticated processing hardware yuav tsum tau tsav cov xim luam ntawm cov ntxaij vab tshaus LCD, uas tuaj yeem tso saib yuav luag txhua yam duab, ntawv nyeem, thiab duab.
