Niaj hnub no, LCD cov kua siv lead ua kua tau nkag mus rau ntau yam khoom siv hluav taws xob uas xav tau los tso saib cov duab thiab cov ntaub ntawv. Ntawm ntau lub vaj huam sib luag vaj huam sib luag, TFT-LCD tuav lub ntsiab lus tseem ceeb. Dab tsi yog qhov qauv ntawm lub vijtsam monochrome LCD.
1. Backlight board: Lub hauv paus ntsiab lus ntawm cov duab LCD yog tswj qhov ci ntsa iab thiab tsaus ntuj los ntawm kev thaiv lub teeb ntawm cov kua siv lead ua kua. Yog li ntawd, lub teeb ci yog qhov tsim nyog kom pom cov duab ntawm qhov screen. Yog li ntawd, lub backlight board yog lub luag hauj lwm rau muab qhov yooj yim tshaj plaws lub teeb qhov chaw rau LCD zaub.
2. Lower polarizing phaj: Cov phaj qis polarizing yog lub luag haujlwm rau kev ua haujlwm ntawm standardizing cov kev taw qhia ntawm lub teeb rau cov kua siv lead ua txheej.
3. Zaj duab xis substrate: Lub kaum sab xis ntawm cov kua siv lead ua kua molecules yog tswj los ntawm TFT.
4. Cov kua siv lead ua kua: Cov kua siv lead ua kua molecules nyob rau hauv cov txheej txheem no yog twisted nyob rau hauv kev tswj ntawm TFT, kom lub teeb nyob rau hauv tib txoj kev coj yuav tig rau thiab tswj, thiaj li hais tias lub brightness ntawm lub teeb mus rau lub rear pixel chav tsev hloov.
5. Xim lim: Tus neeg tsim khoom ntawm qhov khoom no kwv yees tias kev tshoov siab los ntawm cov kua siv lead ua kua.
Los ntawm qhov kev xav ntawm cov qauv ntawm cov kua siv lead ua kua, txawm tias nws yog lub laptop lossis lub desktop, nws siv cov txheej txheem txheej txheej uas muaj ntau qhov sib txawv. Lub LCD muaj ob lub iav phaj nrog lub thickness ntawm li 1 hli, sib cais los ntawm ib lub sij hawm tsis sib xws ntawm 5 μm uas muaj cov kua siv lead ua kua (LC). Vim tias 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 ci ntsa iab (lossis txawm tias lub teeb phaj) thiab cov yeeb yaj kiab qhia sab nraum qab ntawm cov kua siv lead ua kua. npo. Lub backlight phaj yog tsim los ntawm cov khoom siv fluorescent. Nws muaj peev xwm emit lub teeb, thiab nws lub luag haujlwm tseem ceeb yog muab lub teeb pom kev zoo tom qab. Lub teeb tawm 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 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 lub pixel ntawm qhov screen. Muaj cov pob tshab electrodes ntawm cov iav phaj thiab cov khoom siv ua kua siv lead ua kua. Cov electrodes tau 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 yog hloov los ntawm kev hloov qhov voltage. Lub luag 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 electrodes nyob rau hauv LCD tsim ib qho hluav taws xob teb, cov kua siv lead ua kua molecules yuav twisted, yog li ntawd lub teeb hla nws yuav tsum refracted tsis tu ncua, thiab ces lim los ntawm lub thib ob txheej ntawm lim txheej thiab tso tawm nyob rau hauv lub screen.
Cov txheej txheem yog sau cov kua siv lead ua kua nruab nrab ntawm ob lub dav hlau lined nrog cov grooves zoo. 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 tau teem 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 ntawm ob lub dav hlau raug yuam mus rau hauv 90-degree twisted xeev. Raws li lub teeb mus raws li cov kev taw qhia ntawm molecular kev npaj, lub teeb kuj yog twisted 90 degrees thaum dhau los ntawm cov kua siv lead ua kua. Tab sis thaum muaj 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 nyob rau hauv tag nrho cov lus qhia. Lub tshuab lim polarization yog qhov ua tau zoo ntawm cov kab sib txuas ua ke. 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 sib npaug tag nrho, lossis lub teeb nws tus kheej tau raug twisted kom phim lub lim dej thib ob, 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 ob lub lim dej tau ntim nrog cov kua dej sib tw, tom qab lub teeb dhau los ntawm thawj lub lim dej, nws yuav raug twisted 90 degrees los ntawm cov kua siv lead ua kua molecules, 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 ua dua thiab ua tib zoo sib luag, kom lub teeb yuav tsis sib tw, yog li nws yuav raug thaiv los ntawm lim thib ob. Hauv luv luv, lub zog yog siv los thaiv lub teeb, thiab tsis muaj lub zog siv los ua kom lub teeb tawm.
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. Txawm li cas los xij, vim hais tias lub computer screen yuav luag txhua lub sijhawm, tsuas yog cov kev daws teeb meem ntawm "powering on and blocking the light" tuaj yeem ua tiav lub hom phiaj txuag hluav taws xob tshaj plaws.
