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Ntsiab cai ntawm cov kua siv lead ua kua

Ntsiab cai ntawm cov kua siv lead ua kua

Jul 03, 2018

Ntsiab cai ntawm cov kua siv lead ua kua

Muaj ib qho kev sib tw muaj zog ntawm txhua yam kev lag luam hauv lub tsev lag luam hauv lub lag luam, thiab txhua lub lag luam xav tau qhov sib qhia ntau tshaj ntawm no cov ncuav mog qab zib loj. Thiab thaum twg tib neeg tsiv mus rau 15 nti, yuav Ping Ping mus yuav tsev. Peb yuav tsum tau nug tsis tas: dab tsi yog qhov kub kub ntawm lub cim ntxiv? Cov spearhead ncaj qha mus rau lub kua siv lead ua kua. Cov kua dej ua kua muaj qhov zoo ntawm meej thiab meej duab, cov zaub mov, thin thickness, lub cev nyhav, tsis muaj hluav taws xob, qis zog noj, tsis ua hauj lwm thiab tsis ua hauj lwm.


Kev faib tawm ntawm cov khoom siv lead ua kua

Raws li hom kev tswj, LCD muab faib ua ob hom: passive matrix LCD thiab active matrix LCD.


Kev faib tawm ntawm cov khoom siv lead ua kua

1. Raws li kev tswj hom, LCD muab faib ua ob hom: passive matrix LCD thiab active matrix LCD.
Passive matrix LCD txwv tsis pub muaj qhov ci ci thiab pom lub kaum sab xis, thiab nws txoj kev kub ceev yog qeeb. Vim yog qhov zoo ntawm daim duab, lub tshuab ntaus ntawv tsis pom zoo rau kev tsim duab tso tawm, tab sis vim yog tus nqi pheej yig, tseem muaj qee cov lus qhia nyob rau hauv kev ua lag luam siv passive matrix LCD. Passive matrix LCD muab faib ua TN-LCD (Twisted Nematic-LCD, sib tshooj sab LCD), STN-LCD (Super TN-LCD, super twisted nematic LCD) thiab DSTN-LCD (Ob txheej txheej).
2. Tam sim no, tus dav siv matrix LCD siv tseem hu ua TFT-LCD (Thin Film Transistor-LCD, nyias zaj duab xis transistor LCD). TFT LCD yog ua hauv txhua pixel ntawm qhov screen los tsim transistors, enabling zog xim, richer xim thiab dav saib thaj tsam. Piv nrog CRT cov duab, cov duab tso tawm ntawm cov duab LCD los ua qhov tsawg dua, tsawg dua cov desktop thiab tsawg zog, tab sis cov CRT tshuab siv ntau ruaj khov thiab paub tab.


Txoj haujlwm ua haujlwm ntawm cov tshuaj siv lead ua kua
Peb tau paub ntev tias qhov teeb meem muaj peb lub xeev: khoom hauv lub xeev, kua hauv lub xeev thiab lub xeev siv roj. Kev kho ntawm qhov chaw ntawm cov kua roj (liquid molecule) tsis yog li niaj zaus, tab sis yog tias cov molecules ntev (los yog tiaj), lawv cov kev coj ua molecular tej zaum yuav tsis tu ncua. Li ntawd, peb tau subdivide kua ntau hom. Cov kua uas ua rau lub cev tsis haum yog hu ua cov kua qaub ncaj qha, thiab cov kua uas muaj lub plhaub rau ntawm lub cev yog hu ua "crystal liquid", los yog "crystal liquid" rau luv luv. Cov khoom siv ua kua ua tsis tau yog tsis coj txawv txawv rau peb. Cov xov tooj ntawm tes thiab cov laij lej uas peb tau txais feem ntau yog cov khoom siv ua kua ua kua. Cov kua siv lead ua kua hauv 1888 los ntawm Austrian botanist Reinitzer, ib qho organic compound ntawm cov khoom ua kua thiab kua, nrog ib qho kev tu ncua molecular. Qhov feem ntau siv cov kua siv lead ua kua yog nematic kua siv lead ua kua. Cov duab ntawm lub molecule yog ib qho bar, thiab qhov ntev thiab dav ntawm cov kua siv lead ua kua li 1nm txog 10nm. Raws li qhov kev txiav txim ntawm cov hluav taws xob txawv, cov kua siv lead ua kua molecules yuav hloov los ntawm 90 degrees, ua qhov sib txawv ntawm lub teeb hloov, kom lub teeb thiab tsaus sib txawv yog ua nyob rau hauv lub hwj huam ON / OFF, thiab txhua pixel tuaj yeem tswj tau ntawm qhov no txoj ntsiab cai. Ua cov duab xav tau.
1. kev ua haujlwm pas nrig LCD ua haujlwm
Cov qauv kev nthuav dav ntawm TN-LCD, STN-LCD thiab DSTN-LCD yeej zoo li qub. Qhov txawv yog hais tias lub twist ntawm cov kua siv lead ua kua molecules yog txawv me ntsis. Coj tus qauv TN-LCD ua piv txwv, peb yuav qhia nws cov qauv thiab kev ua haujlwm.
Nyob rau hauv TN-LCD LCD vaj huam sib luag, uas yog tsawg tshaj 1 centimeters hauv tuab, nws yog feem ntau ua los ntawm ob lub iav loj substrates, uas muaj qhaub cij nrog cov ntxaij lim dej thiab txuam cov duab thiab lwm cov pa taws ob sab. Lawv tuaj yeem txiav txim siab txog tus nqi siab tshaj plaws ntawm cov luminous flux thiab cov xim ntawm cov xim. Cov xim xim yog tsim los ntawm peb xim ntawm xim liab, ntsuab thiab xiav, uas yog xwm yeem ua rau ib lub iav loj loj. Txhua pixel yog ua los ntawm peb cov xim xim (los yog sub pixels). Yog tias lub vaj huam sib luag muaj 1280 x 1024, nws yeej muaj 3840 x 1024 transistors thiab sub pixels. Qaum kaum sab laug (grey voos) ntawm txhua tus sub-pixel yog ib zaj duab xis nyias nyias uas yog opaque rau lub teeb. Xim lim tau tsim RGB tricolor. Txhua interlayer muaj electrodes thiab ib zawj ua rau ntawm zaj duab xis tuab si lug. Sab qaum thiab sab sib tshooj sib xyaw nrog cov multilayer kua siv lead ua molecules (tsawg dua 5 x 10-6m hauv cov chaw siv lead ua kua). Nyob hauv tib lub txheej, cov haujlwm ntawm cov kua siv lead ua kua molecules yog cov lus tsis zoo, tab sis qhov ntev ntawm kev qhia ua piv txwv yog mus rau lub phom polarizing. Ntawm qhov tod tes, ntawm cov khaubncaws sab nraud povtseg sib txawv, qhov ntev ntawm txoj kab ntawm cov kua siv lead ua kua molecules yog 90 nquag txuas nrog lub dav hlau ntawm lub ncov qaum. Ntawm lawv, qhov kev taw qhia ntawm qhov ntev ntawm txoj kab ntawm ob txheej ntawm cov kua siv lead ua nyob rau hauv lub phom polarizing yog raws li lub teeb meem polarized lub teeb ntawm cov uas nyob ib sab. Cov kua siv lead ua kua molecules ze ntawm lub sab nraud interlayer yog teem rau hauv cov kev taw qhia ntawm lub sab nraud, thaum lub kua siv lead ua kua molecules hauv sab hauv interlayer raug teem nyob rau hauv cov kev taw qhia ntawm qhov qis trench. Thaum kawg, nws yog encapsulated rau hauv kua qia cell thiab txuas nrog lub tsav IC, tus tswj IC thiab cov ntawv luam tawm Circuit Court board.
Nyob rau hauv ib txwm mob, thaum lub teeb yog irradiated los ntawm sab saum toj mus rau hauv qab, tsuas yog ib lub teeb ntawm lub teeb tau nkag mus rau hauv lub zawj ntawm lub sab hauv interlayer los ntawm lub sab saum toj polarizing phaj, thiab ces dhau los ntawm qis qis dua polarized lub phaj los ntawm kua siv lead ua kua molecules, ua tiav txoj kev ntawm lub teeb nkag mus. Ob lub khaubncaws sab nraud povtseg ntawm polarizing plates yog txuas rau cov kua siv lead ua kua. Kev kho thiab kev sib kis ntawm ob lub thawv polarizing yog tib yam li cov neeg ntawm lub sab saud thiab qis ntawm cov grooves. Thaum ib qho kev siv hluav taws xob ntswj los siv cov kua siv lead ua kua, cov kua siv lead ua yuav hloov nws lub xeev thawj zaug vim hais tias muaj kev cuam tshuam ntawm cov hluav taws xob sab nraud. Nws yuav tsis npaj rau hauv ib qho kev coj ua thiab ua ib lub xeev ntsug. Vim li no, cov kua siv lead ua kua yuav raug muab ntxaum los ntawm ob txheej polarizer thiab tag nrho cov qauv yuav ua rau muaj teeb meem, uas ua rau dub ntawm lub vijtsam zaub. Thaum cov kua siv lead ua kua tsis siv qhov voltage, cov kua siv lead ua kua hauv nws lub xeev pib, hloov qhov teeb meem ntawm teeb meem los ntawm 90 degrees, yog li ntawd qhov teeb meem ntawm lub teeb nruab nruam yuav kis tau los ntawm tag nrho cov qauv, thiab qhov tshwm sim yog dawb ntawm lub vijtsam duab. Ua kom tiav cov xim uas koj xav tau ntawm txhua qhov pixel ntawm lub vaj huam sib luag, ntau lub teeb cathode nta yuav tsum tau siv raws li lub teeb nruab nrab ntawm cov zaub.
2. ua haujlwm matrix LCD ua haujlwm
Tus qauv ntawm TFT-LCD kua Crystal zaub yog yeej zoo ib yam li ntawm TN-LCD kua Crystal display, tab sis tsuas yog cov electrode ntawm qhov interlayer ntawm lub TN-LCD yog hloov mus rau FET transistor, thiab qhov qis interlayer hloov rau ib qho hluav taws xob.
Tus qauv ua haujlwm ntawm TFT-LCD kua siv lead ua yog txawv ntawm TN-LCD. Lub hauv paus ntsiab lus ntawm TFT-LCD LCD zaub yog "rov qab" los ntawm irradiation. Thaum lub teeb ci irradiated, nws thawj kis tau los ntawm qhov qis sab polarizer thiab ntws los ntawm cov kua siv lead ua kua molecules. Raws li cov electrode ntawm lub nruab nrab thiab qis dua interlayer yuav hloov mus rau FET electrode thiab cov electrode, cov txheej txheem ntawm cov kua siv lead ua kua dej kuj yuav hloov thaum lub FET electrode nyob, thiab lub hom phiaj ntawm qhov pom tau los ntawm lub teeb shading thiab lub teeb kis. Tab sis qhov txawv yog vim tias FET transistor muaj cov nyhuv loj, nws muaj peev xwm ua kom lub xeev muaj peev xwm, thiab cov kua siv dawb ua kua dej yuav ua kom lub xeev no kom txog thaum FET electrode tau ntxiv los hloov nws cov kev hloov nyob rau lwm zaus.