Tsev > Exhibition > Ntsiab lus

Lub hauv paus ntsiab lus ntawm cov yas siv lead ua kua (Ye Jingping)

Oct 12, 2017

Ua kua dej ua kua yog ib yam khoom ua kua thiab kua. Nws yog ib qho organic compound nrog kev hloov kho molecular. Yog hais tias nws yog rhuab, nws yuav tsim ib lub kua muag dawb. Thaum nws txias, lub turbid particle yuav tshwm tuaj. Nws muaj cov yam ntxwv ntawm kua thiab siv lead ua, yog li nws yog hu ua kua Crystal. "Lub ntsiab lus ntawm cov kua siv lead ua kua cias, yog cov kua siv lead ua ntawm ob lub electrodes ntawm qhov hluav taws xob, kev hloov cov kua siv lead ua kua hloov yuav hloov nyob rau hauv qhov kev txiav txim ntawm cov Electrode yog energized, txoj kev kaj los pauv qhov kis tau tus mob ntawm lub teeb kom tswj tau cov duab.

Cov dej ua kua siv ua dej ua raws li kev sib txawv ntawm txoj kev tswj tau muab faib rau hauv lub siab tawv (matrix passive), LCD thiab active matrix (active matrix) LCD ob.

Pas nrig matrix LCD tau muab faib ua TN-LCD (Twisted Nematic-LCD, LCD STN-LCD ntswj nematic (Super), TN-LCD, super nistatic (Ob chav LCD) thiab DSTN-LCD txheej STN-LCD, ob chav super twisted nematic LCD) peb. Lub hauv paus ntsiab lus ntawm TN, STN, DSTN LCD vaj huam sib luag yog tib yam, qhov txawv yog qhov sib tw ntawm lub kua siv lead ua kua molecules yog me ntsis txawv. Lub DSTN (nquag hu ua "pseudo color") hauv phau ntawv qhia kev siv computer thaum ntxov thiab lub tshuab ntaus ntawv siv dav. Passive matrix LCD vim tias nws yuav tsum qiv cov duab teeb pom kev, qhov muag pom lub me me, qeeb qeeb, cov duab zoo tsis siab, cov zaub ntaus tsis yog qhov tsim rau txoj kev loj hlob ntawm cov duab tso tawm, tab sis vim yog tus nqi pheej yig, kev ua lag luam tseem yog ib cov zaub uas siv tus pas passive LCD. Rau cov passive matrix LCD, vim hais tias nws yuav ua tau thinner, sib zog, thiab ntau zog npaum li cas, nws yuav pab tau rau cov handheld computers thiab console ua si yog tias nws muaj peev xwm ua tau zoo lawm.

Tam sim no, cov kua siv lead ua kua feem ntau pom cov qauv matrix LCD, los yog TFT-LCD (Nyias, FilmTransistor-LCD, nyias zaj duab xis transistor LCD). TFT kua Crystal zaub yog txhua pixel hauv daim duab ntawm tus tswv built-in, pom thaj chaw yuav ua rau kom ci ntsa iab thiab ntau yam xim thiab ntau lub vijtsam, nrog cov lus teb ceev ceev, zoo ibyam, ua kom pom ci ntsa iab, loj saib lub kaum, xim nplua nuj thiab lwm yam. Cov lus txhais Suav ntawm TFT LCD hu ua thin film transistor kua siv lead ua kua. Los ntawm txoj cai tswj hwm ntawm kev ua haujlwm hauv LCD, peb pom tau tias cov kua siv lead ua kua yuav tsum tau tswj kom tau qhov ntsuas ntawm cov grey, thiab siv cov yeeb yaj kiab-transistors los ua hluav taws xob kom tswj tau lub siab thaum hu ua TFT LCD. TFT LCD vaj huam sib luag, los ntawm sab nraud mus rau sab nraud ntawm lub thawv ntawv polarizing, iav substrate, xim lim, tso rau hauv iav substrate ntawm FET transistor (TFT) electrode, ib qho hluav taws xob, kua siv ua kua, tib lub deposition ntawm iav substrate rau hauv qab ntawm polarizing phaj, qaum (teeb) rau daim ntawv thiab rov qab lub teeb. Lub teeb kis tau los ntawm cov hauv qab txheej thiab tswj tau los ntawm cov kua siv lead ua kua thiab lub thawv polarizing, thiab cov yeeb yuj duab yog tsim los ntawm cov lim phaj.

image.png

Ntawm qhov seem ntawm sab saum toj, lub hau thiab qis ob txheej ntawm iav yog qhwv nrog cov kua pleev xim, yog li ua qhov phaj ua haujlwm rau sab nraud, uas peb hu ua CLC (capacitor, of, liquid, crystal). Nws qhov loj yog li 0.1pF, tab sis, hauv kev xyaum, lub capacitor tsis tuav qhov voltage kom txog thaum lub sij hawm tom ntej nws tshiab cov duab cov ntaub ntawv. Ntawd yog, thaum lub TFT them tus nqi hluav taws xob, nws tsis tuaj yeem tuav qhov teeb meem kom txog thaum lub sij hawm tom ntej TFT tsiv nws dua. (los txhim kho tus zaus nyob rau hauv 60Hz xwb, nws yuav siv li ntawm 16 xuab moos ntawm lub sij hawm kom tswj Nyob rau hauv no txoj kev, qhov hloov voltage yog hloov thiab lub nplai grey tso tawm kom pom incorrectly. capacitor ~ 0.5pF), kom cov nqi hluav taws xob thiaj li yuav tuaj yeem kho kom txog thaum lub sij hawm tom ntej los hloov daim duab, tiam sis qhov tseeb, ntev hauv iav ntawm TFT nws tus kheej, ib lub raj siv lead ua los ntawm qhov hloov xwb. txiav txim siab seb tus nqi hluav taws xob nyob rau qhov twg yog qhov tseem ceeb ntawm lub teeb meem ntawm LCD, qhov chaw, thiab tus tsav tsheb.

Polarizer

Los ntawm tsev kawm phaj siab, peb tau to taub nthwv dej ntawm lub teeb, qhov kev taw qhia ntawm lub teeb nthwv dej yog mus rau lub teb hluav taws xob thiab lub dag lub zog, thiab lub tshuab hluav taws xob thiab sib nqus ntawm lub teeb nws tus kheej yog ib qho sib txawv rau ib leeg. Uas yog hais, qhov kev taw qhia ntawm lub tebchaws, hluav taws xob thiab cov hlau nplaum cheeb tsam muaj 22 tus sib luag. Lub ncov qab zib ua zoo li lub laj kab, thaiv qhov feem ntawm qhov laj kab ntawm lub laj kab, uas tsuas yog cov khoom sib txig sib luag mus dhau ntawm lub laj kab. Yog li ntawd, yog tias peb tuaj tos ib lub ncov qaumteb thiab saib lub teeb, peb xav tias peb nyiam hnav lub tsom iav, thiab lub teeb yuav tsaus muag. Tab sis yog tias koj muab ob daim ncov qaum ua ke, nws txawv. Thaum koj tig lub kaum sab nraud ntawm ob lub phiaj xwm polarizing, koj yuav pom tau tias qhov ci ci ntawm lub teeb yuav tsaus ntuj nrog lub kaum sab xis. Thaum cov ces kaum ntawm ob lub thawv polarizing yog ib qho sib tshooj rau ib leeg, qhov kaj ntawd tsis tag li. Cov kua siv lead ua kua yog siv cov cuab yeej ua kom tiav, cov kua siv lead ua puv ntawm cov qaum thiab qis dua ob lub laj kab, lub plhaub pob txha, thiab siv ua kua hluav taws xob, hloov cov kev taw qhia ntawm lub teeb, teb ntawm ntau qhov ntau thiab tsawg, lawv ua cov grey nplai sib txawv.

Xim lim

Yog hais tias koj saib nyob rau ntawm lub vaj huam sib luag nrog lub iav ntom nti, koj yuav pom nws raws li qhia hauv daim duab hauv qab no. Peb paub hais tias xim liab, xiav, thiab ntsuab yog thawj hom xim. Uas yog hais, koj tuaj yeem sib txawv xim nrog peb cov xim. Muaj ntau cov lus qhia vaj huam sib luag siv cov ntsiab cai no los tso xim. Peb faib peb xim ntawm RGB rau hauv peb cov ntsiab lus cais, txhua tus hloov gray sib txawv, thiab tom qab ntawd ces siv cov lus peb RGB cov ntsiab lus raws li theem pib ntawm cov khoom, uas yog, pixel. Tom qab ntawd qhov no pixel yuav muaj xim txawv txav. Tom qab ntawd, rau ib qho screen zaub uas yuav tsum tau daws teeb meem ntawm 1024 * 768, peb tuaj yeem tso cov duab no kom pom tseeb thaum peb muaj 1024 * 768 pixel nyob rau hauv cov lus qhia ntawm no cov lus qhia vaj huam sib luag. Nyob hauv daim duab, qhov dub qhov nruab nrab ntawm cov ntsiab lus ntawm txhua lub RGB hu ua Black matrix. Nws yog tsuas yog siv los npog qhov chaw uas tsis npaj kom dhau los ntawm lub teeb. Piv txwv, qee qhov kab hauv ITO, los sis Cr / Al kab, los yog qhov chaw ntawm TFT. Yog li, raws li peb pom nyob hauv daim duab, qhov tseem ceeb ntawm txhua RGB tsis yog duab plaub, thiab nyob rau sab qaum phab sab nraud muaj qhov tseem ceeb uas yog khov dua los ntawm lub voos khom dub. Qhov no dub seem yog qhov twg TFT.

image.png


Qhov no yog ib qho xim xim dav. Cov ntawv ua txaij (stripe) feem ntau siv hauv cov khoom OA, nws yog peb lub laptop lossis desktop computer thiab lwm yam. Vim li cas daim ntawv thov no nrog cov strips teem? Yog vim li cas lub software tam sim no, feem ntau nyob rau hauv lub qhov rais interface. Uas yog hais tias, cov ntsiab lus ntawm qhov peb pom yog ntau heev, xws li ntawm qhov loj ntawm lub thawv qhov. Lub sawb zoo, tsuas yog tuaj yeem ua rau lub vov ntug, saib ncaj, thiab yuav tsis muaj kab ncaj nraim, yuav saib cov plaub hau los yog lub siab tawv. Tab sis, yog hais tias nws yog siv hauv AV qhov khoom, tsis zoo li qub. Vim hais tias lub TV teeb liab feem ntau yog cov cim, cov cim ntawm txoj kab tsis ncaj, qhov contour yog qhov tsis ncaj tshaj plaws. Yog li thaum pib, siv hauv AV cov khoom Siv kev tsim mosaic tshiab (mosaic, los yog hu ua kab pheeb ces kaum). Txawm li cas los xij, ntau cov khoom AV, tau raug kho kom zoo dua siv daim duab peb sab (daim duab peb sab, los yog hu ua delta arrangement). Ntxiv nrog rau cov lus teev tseg saum toj no, muaj ib qho kev sib tham hu ua square array. Nws tsis yog tib yam li ua ntej yog tias nws tsis nrog peb lub ntsiab lus ua pixel, tab sis muaj plaub ntsiab lus ua pixel. thiab plaub points ua ke rau ib lub xwmfab.

image.png


Tom qab teeb

Feem ntau ntawm CRT npo yog siv kev siv hluav taws xob high-speed electrons, fluorescent hmoov tshuab hauv lub vuv xauv nyiaj, tsim teeb pom kev, mus tso duab. Txawm li cas los lub LCD nws tsuas yog tswj tau qhov ci ci ntawm lub teeb los ntawm lub teeb nws tus kheej tsis muaj nuj nqi. Yog li, cov kua siv lead ua kua yuav tsum ntxiv ib lub teeb pom kev zoo, muab lub teeb ci ci thiab teeb ci ntsa iab. Peb map daim qauv ntawm TFT LCD tuaj yeem pom nyob rau hauv qhov chaw loj ntawm lub teeb rooj teeb txawb thiab ib lub teeb (cathode txias tube), daim ntawv pheem qhia, lub teeb qhia daim phiaj, cov ntawv ntim, diffusion phaj thiab lwm yam. Lub teeb yog lub nrig ntawm qhov tseem ceeb. Lub teeb qhia daim phiaj, lub teeb tis txhua txhia qhov chaw. Thiab cov phom uas yuav rov qab yuav tsum muaj kev txwv rau cov kev taw qhia TFT LCD nkaus xwb. Thaum kawg, los ntawm daim ntawv ntom ntom ntom nti thiab lub qhov muag teeb ntawm lub teeb. Uniformly xa mus rau txhua cheeb tsam, ib lub teeb ci teeb ci yog muab rau TFT LCD, thaum lub TFT LCD tswj kev sib hloov ntawm cov kua siv lead ua los ntawm kev tswj lub ci ci ntawm lub teeb rau ib qhov sib txawv ntawm grey.

Sealant thiab spacer

Hauv seem LCD ntawm TFT qauv thiab thooj khov ntawm ob hom kua nplaum thiab lub raj. Siv cov kua nplaum rau ntawm sab nrauv thiab qis dua ob txheej ntawm cov iav, tuaj yeem ua tau zoo, thiab muab ib lub vaj huam sib luag ntawm cov kua siv lead ua kua thiab tawm sab nraum lub thaiv, yog li cov ncej kua nplaum ua nws lub npe nyob ib ncig ntawm lub npov ntawm lub vaj huam sib luag, cov kua siv lead ua kua roj yuav siv rau hauv lub thauv ntawv hauv lub thawv ntawv. Spacer tsuas yog los txhawb nqa ob txheej ntawm cov iav, nws yuav tsum tau muab faib rau hauv cov iav substrate, tab sis lwm yam tshwm sim los ntawm kev tsis sib luag ntawm cov khoom sib koom ua ke, nws yuav hla dhau ntawm lub teeb thiab tsis tuaj yeem tswj qhov sib txawv nruab nrab ntawm ob daim iav ntawm qhov ntawd yuav yog qhov phenomenon ntawm uneven tis ntawm fais fab teb, uas cuam tshuam rau kev ua tau zoo ntawm grey scale lcd.

Aperture piv

Ib qho tseem ceeb tshaj plaws hauv LCD yog qhov ci ntsa iab, thiab qhov tseem ceeb tshaj plaws uas pom qhov kev ci ntsa ci nthuav dav yog qhov qhib qhov siab. Tus nqi qhib yog dab tsi? Hauv cov ntsiab lus yooj yim, qhov sib piv ntawm cov cheeb tsam zoo uas lub teeb sib kis tau los ntawm. Rau sab laug ntawm daim duab yog kua siv ua kua, pom los ntawm sab saum toj lossis sab hauv qab. Thaum lub teeb tawm ntawm lub teeb nruab nrab ntawm lub rooj teeb pom kev zoo, tsis yog tag nrho cov teeb ci ntsa los ntawm lub vaj huam sib luag, piv txwv li rau LCD teeb liab ntawm qhov chaw ntiv taw thiab rooj tsav tsheb nti taug kev ntawm kab, thiab lub TFT nws tus kheej, thiab muab cia rau ib qhov chaw kaw hluav taws xob thiab ua li ntawd. Ntxiv rau cov chaw no tsis yog pob tshab tag nrho, tab sis kuj tseem vim hais tias kev tswj los ntawm cov seem ntawm lub teeb tsis cuam tshuam los ntawm voltage, thiab tsis tuaj yeem yuav pom qhov tseeb txho theem, thiaj li yuav tsum siv cov black matrix los npog, kom tsis txhob cuam tshuam qhov tseeb ci ci ntawm lwm thaj chaw translucent. Yog li, qhov chaw kaj nrig yog sab laug raws li sab xis sab ntawm daim duab qhia. Lub cheeb tsam ntawm kev hloov zoo, uas yog hu ua aperture ratio, yog proportional rau tag nrho cheeb tsam.

image.png


Thaum lub teeb tawm ntawm lub teeb nruab nrab ntawm lub rooj teeb pom kev tuaj yeem tshwm sim los ntawm cov thawv polarizing, iav, siv lead ua, xim lim thiab lwm yam. Yog tias ntau qhov chaw ntawm qhov nkag mus raws li nram qab no: 50% polarizing phaj (vim hais tias lub teeb rooj polarization tsuas yog ib qho kev taw qhia los ntawm 95%), iav (yuav tsum xam lub sab saud thiab qis dua), kua siv lead ua, 95% ntawm 50 feem pua (tsuas yog ib nrab ntawm cov cheeb tsam kev sib kis tau zoo), 27% (piv txwv tias yog lub teeb xim lim khoom nws tus kheej nkag mus tau yog 80%, tab sis vim tias lub lim nws muaj xim nrog, nws tsuas tso tau cov xim ntawm RGB tricolor , tsuas yog peb tau tso cai rau, ib qho ntawm cov kis mus, qhov no tsuas yog 1/3 ntawm qhov ci ntsa iab thiaj li tsuas yog 80% * 33% = 27%. Yog tias koj yuav tsum tau ua kom muaj lub siab tshaj plaws nyob rau hauv tus qauv ntawm TFT LCD.Yog tus nqi qhib siab tuaj, lub ci ntsa iab tuaj yeem nce, thiab qhov ci ntsa iab ntawm lub teeb ci ntsa iab tsis yog yog li siab nyob rau tib lub sijhawm, lub hwj chim noj thiab tus nqi yuav raug cawm dim.

Schematic daim duab ntawm lub vaj huam sib luag hauv LCD

image.png

Los ntawm daim duab saum toj no, peb tuaj yeem nkag siab txog lub qauv ntawm lub vaj huam sib luag hauv LCD. Vim muaj coob tus ntawm Board Circuit siv kev siab zoo kev sib txuas nrog micro ntaus ntawv thiab kev sib tsuam ntawm pawg viav vias multilayer, thiab vim yog qhov kev saib xyuas ntawm cov vaj huam sib luag ntawm LCD rau cov kev cai siab ntawm cov khoom siv, nws ua rau cov vaj huam sib luag hauv LCD nti tsis yooj yim. Vim li no, hauv qhov kev ua haujlwm tiag tiag, ntxiv rau qee cov kev ua yuam kev thiab cov teeb meem tshwm sim, feem ntau peb tsis aim ntawm kev tswj cov vaj huam sib luag hauv LCD. Ntawm no, peb tab tom yuav los ntawm lub vaj huam sib luag ntawm daim phiaj xwm txheej schematic block daim duab kom peb qhov kev nkag siab ntawm lub vaj huam sib luag txuas ntxiv.