Tsev > Exhibition > Ntsiab lus

LCD ua hauj lwm tus txheej txheem

Sep 13, 2017

Peb tau paub ntev tias qhov teeb meem muaj peb lub xeev: khoom, kua, thiab roj. Txawm hais tias tus txheej txheem ntawm cov molecules nyob rau hauv ib qho kua ntau tsis muaj ib txwm, tab sis yog tias cov molecules yog elongated (los yog tiaj), lawv yuav tsum molecular raws. Li ntawd, peb yuav subdivide cov kua ua ntau hom. Cov kua uas tsis muaj qee qhov kev coj ua hauv cov kev coj ua molecular yog hu ua kua ncaj qha, thiab cov kua uas muaj cov khoom siv coj los ua kua dej ua kua, lossis ua kua dej ua kua. "LCD khoom hauv qhov tseeb, rau peb tsis muaj xov tooj rau peb cov xov tooj ntawm tes, Cov khoom siv ua kua (liquid crystal), pom tshwm hauv 1888 los ntawm Austrian botanist Leni FM (Reinitzer), yog ib qho organic compound ntawm cov khoom thiab kua nrog cov tshuaj molecular tshiab. qhov dav ntawm 1nm ~ 10nm, nyob rau hauv txawv teb tam sim no, cov kua siv lead ua molecules yuav txiav txim siab 90 degree kev sib hloov, tsim qhov sib txawv ntawm qhov sib txawv, qhov sib txawv ntawm lub teeb thiab ntxoov ntxoo nyob rau hauv ON / OFF fais fab mov, thiab tswj tus cai ntawm txhua pixel muaj peev xwm tshwm sim tawm yam duab.


Lub hauv paus ntsiab lus ntawm cov kua siv lead ua kua yog cov kua roj ntsha ua rau pom pom txawv ntawm cov hluav taws xob txawv. Cov dej ua kua yog muab faib ua ob hom kev kawm hauv physics, yog hom passive Passive (tseem hu ua passive), hom kua siv lead ua lub teeb rau nws tus kheej yuav tsum muab sab nrauv qhov chaw, raws qhov chaw ntawm lub teeb ci, thiab muab faib tau rau hauv reflection thiab kis ob hom.Passive kua crystal display qis nqi, tab sis qhov ci ntsa iab thiab qhov sib txawv tsis loj, tiam sis tsis tshua muaj txiaj ntsim zoo, xim xim kua txig ua kua dej ua kom me me, yog li ntawd xim tsis txaus. Qhov thib ib yog qhov fais fab, feem ntau TFT (Thin Film Transitor). Txhua cov kua siv lead ua kua yog ib qho loom loj transistor li, tsis yog hais lus nruj. Ua kua dej ua kua siv lead ua kua yog ua los ntawm ntau cov kua siv lead ua kua uas, nyob rau hauv monochrome kua Crystal display, kua siv ua kua yog ib qho pixel hauv xim xim LCD hauv txhua lub Pixel muaj peb RGB LCD. Tib lub sijhawm peb tuaj yeem xav txog ntawm txhua lub kwj deg muaj 8 npij cov npe, tus nqi sau npe txiav txim siab qhov ci ntawm peb cov kua siv lead ua kua, tiam sis qhov qis tshaj npe ncaj qha tsis tsav cov kua qaub tsim kua qaum, "palette" rau txhua lub pixel. Muaj nruab nrog lub koom txoos lub cev tsis yog qhov tseeb, qhov tseeb tsuas yog nruab nrog ib txoj kab ntawm cov npe. Cov ntawv sau npe no puv ntes rau txhua kab ntawm pixels thiab muab tso rau ntawm kab, yuav tsav tag nrho cov pixels kab dua qhia tau hais tias tag nrho daim duab (thev plaub).


Ua kua dej ua kua zoo li ib lub kua los ntawm nws cov duab thiab cov tsos, tab sis nws txoj kev ua molecular crystalline qhia tau hais tias yog daim ntawv. Raws li cov hlau nplaum hauv cov hlau, thaum raug rau ib qho hluav taws xob sab nraud, cov molecules tau yuam kom raws nraim; ua raws li kev npaj ntawm cov khoom xyaw kom tswj kom zoo, cov kua siv lead ua kua molecules yuav tso cai rau nkag mus rau hauv LCD; lub teeb txoj kev muaj peev xwm yuav tsim los ntawm molecular tshiab nws yog txiav txim siab, nws yog ib hom ntawm yam ntxwv ntawm khoom. Cov dej siv lead ua kua yog ib qho organic compound uas muaj cov kabmob ntev ntev. Nyob rau hauv lub xeev ntuj, qhov ntev coes ntawm cov rodlike molecules yog rally sib npaug. Lub vijtsam LCD (Ua Kua Crystal Zaub, tomqab ntawd hu ua LCD) yog thawj qhov yuavtsum yog nyob ntawm cov qauv siv dej ua kua txig uas muaj ob kab nrog cov haujlwm kom zoo. Ob lub dav hlau ntawm qhov zaws ntawm ib sab (90 degree kev sib tshuam), uas yog hais tias, yog hais tias lub dav hlau qaum teb sab qaum teb-sab qab teb, lwm qhov dav hlau molecular east-west, thiab nyob nruab nrab ntawm ob qhov chaw ntawm molecular yog yuam ua 90 degree tig xeev. Raws li lub teeb tsiv raws li cov kev taw qhia ntawm cov molecules, lub teeb kis tau los ntawm cov kua siv lead ua kua thiab muab 90 degrees. Tab sis thaum muaj qhov voltage ntxiv rau cov kua siv lead ua kua, cov molecules yog teem kom vertically thiaj li hais tias lub teeb yuav mus ncaj tawm tsis muaj twisting. Qhov thib ob feature ntawm LCD yog qhov uas nws cia siab rau cov ntxaij lim dej thiab lub teeb ntawm nws tus kheej, qhov twg lub teeb ci ntsa iab yog nyob rau txhua qhov kev qhia, thiab cov ntxaij lim dej polarized tau ua ib kab ntawm kev qhia nyias nyias. Cov xov hlau tsim ib lub mesh uas thaiv tag nrho cov rays tsis parallel mus rau kab. Cov kab ntawm cov xim lim piam no yog ib qho rau thawj tus thawj, yog li ntawd nws ua rau cov teeb ci uas muaj polarizing tag nrho. Tsuas yog cov kab ntawm cov ntxaij lim dej ob qho tib si nkaus xwb, los yog lub teeb nws tus kheej tau muab rov qab kom phim lub thawv thib ob lub thawv polarization, thiab lub teeb mus tob. LCD ua los ntawm ob lub vojvoog zoo li cov ntxaij lim dej, yog li nyob rau hauv ib txwm muaj tshwm sim, tag nrho cov kev nkag mus rau hauv lub teeb yuav tsum raug thaiv. Txawm li cas los xij, txij li ob qho ntxaij lim dej uas muaj cov kua nplaum uas muaj cov kua nplaum, lawv yuav tsum yog 90 degrees tom qab lub teeb dhau ntawm thawj lim, thiab thaum kawg dhau los ntawm ob qho ntxaij lim dej. Ntawm qhov tod tes, yog tias qhov voltage ntxiv rau cov kua siv lead ua kua, cov molecules yuav rearrange thiab ua kom tiav mus kom tas lub teeb tsis rov qab, yog li ntawd cov ntxaij lim dej thib ob thaiv. Coj Synaptics TDDI cov cuab yeej siv ua piv txwv ntawm kev sib txuas ntawm kev sib tsuam thiab kev tsav tsheb rau hauv ib tus ntiv tes, uas txo cov khoom thiab simplifies tsim. ClearPad 4291 txhawb lub zog ntawm tus qauv siv rau kev lag luam uas cuam tshuam rau kev sib cais ntawm cov cuab yeej sib cais los ntawm exploiting tus txheej txheem uas twb muaj lawm ntawm cov kua siv ua kua (LCD). ClearPad 4191 tau txais ib kauj ruam ntxiv, los ntawm kev siv cov electrodes uas twb muaj nyob rau hauv LCD lawm, qhov no ua kom muaj lub cev zoo dua qub. Ob lub ntsiab ua tus thiav npo thinner thiab lub zog zoo dua, pab txhim kho cov teebmeem tagnrho ntawm smartphones thiab ntsiav tshuaj. Rau lub TN (paab cov ntsev ua kua dej nematic kua Ntshiab) Twisted Nematic uas yog tsim los ntawm cov khaubncaws sab nraud povtseg raws li nram qab no: lub thawv polarization, thiab cov iav dawb, nruab nrab ntawm ib leeg thiab ob chav ntawm electrodes thiab electrode, iav, kua siv ua kua, polarization lim, reflector .