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Luv qhia txog cov khoom siv lead ua kua thiab kev paub txog LCD

Aug 18, 2017

Qhia txog luv luv txog kua siv lead ua kua

Nyob rau hauv 1888, cov kws tshawb fawb tau hu ua Leni FM, Austria, coj los ua ib qho kev sib txawv ntawm cov organic, uas muaj ob lub ntsiab lus melting. Thaum twg nws yog rhuab mus rau 145 degrees centigrade, nws kua siv lead ua cov khoom siv lead ua yog molten rau hauv dej, tsuas yog turbid, thiab tag nrho cov tshuaj dawb yog pob tshab thaum lawv melted. Yog hais tias nws tseem sov mus txog 175 degrees centigrade, nws zoo li yaj dua thiab ua kua thiab dawb kua. Nws yuav tsum yog cov khoom tshwj xeeb hauv lub xeev txawv ntawm cov khoom (siv lead ua) thiab txawv ntawm kua (yogotropic, ntws kua) thiab roj. Lub sijhawm ntawd, tus German physicist Deman D Leimann hu ua kua Crystal English, uas yog hu ua "Liquid Crystal" LCD, hu ua LC, kua siv ua kua dej ua tau hu ua LCD.

Kev paub txog cov kua siv lead ua kua

Kev loj hlob keeb kwm ntawm kua siv lead ua zaub technology

Cov khoom siv ua kua dej yog hais txog kev siv cov kua hluav taws xob ua kua hluav taws xob, qhov hloov ntawm cov hluav taws xob, qhov chaw nqus dej, kua crystal teeb thiab kub hloov mus rau hauv cov ntawv pom kev hauv qee qhov kev tsim nyog tau ua kom pom. Txij li thaum xyoo 1968, tus qauv ntawm cov kua dej ua kua tom qab yug, kev tsim cov tshuab LCD siv tau ua 5 theem: thawj theem (1968 - 1972): xyoo 1968 United States RCA lub tuam txhab tsim cov hluav taws xob zoo ntawm cov kua siv lead ua kua, 1972 los tsim ib qho kev tawg quas ntsa zoo li cov kua siv ua kua, LCD tshuab pib siv theem. Qhov thib ob theem (1971-1984): 1971 Swiss inventor ntawm cov kua roj hmab nematic ua kua dej (TN), cov Japanese cov producers ua rau nws industrialization, vim TN-LCD muaj tsawg tsim raug, ua cov mainstream LCD khoom hauv lub xyoo pua xyoo pua 70 thiab 80s. Qhov thib peb theem (1985-1990): tom qab xyoo 1985, vim cov kua nplaum tsim kua hluav taws xob (STN) kev loj hlob thiab cov duab tho hlua silicon cov yeeb yaj kiab transistor ua kua dej ua ke ntawm cov khoom tsim tawm, kev tsim cov tshuab LCD tau nkag mus rau theem NPC zaub. Cov theem plaub (1990-1995) los ntawm kev loj hlob sai ntawm tus qauv matrix kua Crystal Display (LCD), LCD tshuab tau pib nkag mus rau theem siab zoo LCD. Qhov thib tsib theem (tomqab xyoo 1996): LCD tau siv ntau hauv cov computers. Txij li thaum 1998, TFT - LCD khoom tau nkag mus rau hauv lub khw saib xyuas, thiab peb qhov teeb meem loj uas tau plawed LCD ntev ntev tau raug daws. Tam sim no, Tuam Tshoj yog tus loj tshaj plaws ntawm TN-LCD khoom STN-LCD ntau lawm, TFT LCD khoom los yog void, vim peb tsis txheeb cheeb tsam raug tsim ntawm TFT matrix, uas ua rau LCD khoom nyob rau hauv ib theem qis.

Dej ua kua pom kev

Raws li kev faib tawm hauv lub cev

Raws li cov qauv ntawm lub cev, LCD tau muab faib ua ob daim duab kos duab (DSTN-LCD) thiab thin film transistor active array zaub (TFT-LCD), thaum vas nthiv DSTN (HPA) yog qhov ua tau zoo ntawm ob. DSTN (Dual, Scan, Tortuosity, Nomograph) ob chav scan twisted array, uas scans nistatic LCD npo los ntawm ob chav luam kom mus cuag lub hom phiaj ntawm cov khoom. DSTN yog tsim los ntawm super twisted nematic zaub (STN). Vim hais tias ntawm ob lub tshuab coj los siv hauv DSTN, cov nyhuv ua kom zoo dua qub nrog rau STN. Thaum laptops ua ntej tshwm sim, lawv tau siv cov STN, raws li DSTN. Qhov sij hawm tshwm sim ntawm STN thiab DSTN qeeb qeeb, feem ntau ntawm 300ms. Los ntawm txoj cai ntawm cov kua siv lead ua kua, STN yog lub ntsiab lus ntawm cov kua siv lead ua kua hauv lub teb hluav taws xob yog 180 degrees tshaj qhov kev sib hloov kom hloov pauv hloov ntawm cheeb tsam ntawm kev siv hluav taws xob los ntawm kev soj ntsuas kev hloov pauv hauv txoj kev ua hluav taws xob , pheej hloov qhov voltage ntawm txhua tus taw tes ntawm txoj kev ua haujlwm rov qab qeeb qeeb, yog li ntawd nws yuav tsim cov kev tshwm sim tom qab dhau los. Cov duab ntawm DSTN yog: kev soj ntsuam qhov screen yog muab faib ua ob ntu, CPU thiab mus rau ob qhov tshiab ua kom tiav (ob chav scan), yog li txawm tias qhov kev kho dua tshiab dua ib qho luam tawm (STN) kom muab qhov kev tshuaj ntsuam ob zaug ceev dua, nws kho tus nqi, txhim kho cov nyhuv. Raws li DSTN luam theej thiab nqis ob lub vijtsam tib lub sij hawm, nce thiab nqis ob qhov chaw yuav tshwm sim tshiab, vim li ntawd, thaum kev tivthaiv kev ua haujlwm tsis zoo, feem ntau ntawm kev siv, qhov yuav tshwm rau hauv nruab nrab qhov ntawm ib qhov muag plooj ci kab rov tav. Tsis tas li ntawd, vim DSTN pixel cov ntaub ntawv ntawm qhov kev tshuaj ntsuam ntawm ob sab ntawm lub transistor los ntawm kev tswj tag nrho ntawm leej pixels rau cov duab, txhua pixel tsis yog qhov luminous, passive duab taw tes, kom ceev ceev, qhov screen refresh yuav tawm hauv Phantom, qhov sib txawv thiab qhov ci ntsa iab qis dua CRT, cov duab tso tsaus ntau ntau.

TFT, thin zaj duab xis field effect transistor hu ua thin film transistor, txhais tau tias txhua cov kua siv lead ua pixel ntawm lub kua siv lead ua kua yog tsav los ntawm ib zaj duab xis transistor hauv nws. Yog li, cov ntaub ntawv screen yuav tshwm nrog kev kub ceev, kev ci ci thiab siab zoo. TFT belongs rau ib qho matrix kua Crystal zaub (AM-LCD), thiab txhua pixel ntawm TFT-LCD yog tswj los ntawm ib qho TFT rau nws tus kheej. Nws yog ib qho pixel. Yog li ntawd, tsis tsuas yog lub sij hawm ntawm cov tshuaj tiv thaiv yuav ua tau zoo heev, tsawg kawg txog 80ms, tab sis kuj qhov sib txawv thiab ci ntsa iab tau zoo heev, thiab qhov kev daws teeb meem tau mus txog ib qho kev ua tsis tau zoo. Vim nws siab tshaj qhov sib txawv ntawm ob hom kev sib npaug thiab cov xim richer, qhov kev hloov tshiab sai dua, feem ntau hu ua "xim".

Yog cais ntawm qhov interface

Analog interface input analog Pib ntsais koj teeb rau cov duab TFT-LCD, tso nws tus kheej yog qhov khoom funny heev. Cov computers muaj cov ntaub ntawv qhia, xws li cov ntaub ntawv duab thiab muab tso rau hauv cov khoom sib piv hauv daim npav, thiab tom qab ntawd los ntawm txoj kab txuas mus rau cov duab, thiab tom qab ntawd ces ntawm cov lus qhia hauv cov teeb liab, kua siv lead ua kua. Cov kev sib txuas ntawm digital interface ntawm cov qauv siv lead ua kua yog LVDS, TDMS, GVIF, P & D, DVI thiab DFP, thiab ntau lwm yam.

TFT zaub simulation interface cov interface thiab analog interface yog ib qho ntawm cov kev tsis muaj zog loj tshaj plaws yog qhov pom ntawm pixel flicker thaum tso tawm kom pom, vim li cas ntawm qhov tshwm sim no yog lub sij hawm tsawg tshaj thiab cov teeb liab analog teeb liab 100% synchronization, uas ua rau muaj tsawg tus pixels nyob rau hauv cov duab flashes, lub cim thiab thaum twg cov cuab kev ntau dua. Lub TFT ntawm cov kev sib tw digital tsis muaj qhov teeb meem ntawm qhov khiav ntawm lub suab sib txuas rau lub suab analog, uas txhais tau hais tias rau TFT-LCD ntawm lub digital interface, tsuas yog ci ntsa iab thiab qhov sib txawv. Qhov zoo: tsis muaj teeb liab kev hloov, digital rau analog hloov dua tshiab hauv cov txheej txheem kev lwj tsis tas yuav tsum ua raws sij hawm moos, vector kev hloov ntawm cov nqi, txo qhov Circuit Court thiab cov khoom sib thooj rau VGA video teeb liab qhov kev sib tw tam sim no tshaj qhov standard computer tsis tas yuav yuav tsum tau txais ib daim npav tshwj xeeb uas tsis pom muaj: tsawg kawg yog peb qhov qauv (P & D, DFP thiab DVI) nrog cov yeeb yaj duab cov duab nrog kev siv cov ntawv, kom tsis txhob tshwm sim ntawm lub zuaj ntawm pixels, nws yuav tsum yog raws nraim tib lub sijhawm, cable vector thiab analog teeb liab kis hluav taws xob cuam hauv hauv Circuit Court mus tso rau analog-rau-digital conversion tsis tau upgraded rau digital interface

Lub ntsiab Technical indicators LCD

1) Resolution LCD yog los ntawm cov kua siv lead ua kua pixel, tab sis vim muaj cov lej thiab qhov chaw ntawm cov kua siv lead ua pixels tas li, ces cov LCD tsuas yog cov txheej txheem daws teeb meem thiaj li ua kom tiav qhov zoo tshaj plaws cov nyhuv, thaum nyob hauv qhov kev daws teeb meem yog txiav txim siab los ntawm kev sab hauv sab hauv IC IC los ntawm kev cuam tshuam algorithm thiab kev suav.

2) Los ntawm LCD cov duab pixel spacing ntawm LCD (pixel suab) lub ntsiab zoo li CRT (teev suab), tab sis los ntawm qhov tseem ceeb ntawm cov qub rau cov khoom ua haujlwm tsis siab li. CRT taw tes vim hais tias daim npog ntsej muag lossis grating tsim, video card hom, ntsug lossis kab rov tav feem ntau sib txawv, cov pixels LCD zaub yog tas.

3) Ripple (tseem hu ua dej ripple Moire), tab sis kuj nrog tib theem tsis pom, dej ripples yuav qhia rau ntawm qhov screen xws li dej ripples dav theem tau.

4) Lub sij hawm teb yog qhov ceev uas txhua lub pixel teb rau lub teeb liab, piv txwv li, qhov ceev ntawm qhov pixel ntawm tsaus nti los yog los ntawm lub teeb tsaus, hauv milliseconds (MS).

5) Qhov pom ntawm qhov pom, lub qhov muag pom yog lub siab tshaj plaws ntawm lub LCD thaum lub vijtsam ua duab tsis yog ntau tshaj ib qho.

6) Lub siab hloov tshiab ntawm lub LCD monitor, vim qhov sib txawv ntawm qhov tsim, cov duab LCD tsis ua tiag li cov CRT zaub vim tias qhov kev hloov tshiab.

7) Teeb pom kev zoo thiab qhov sib txawv yog qhov ci ci ntsa iab tuaj yeem tsim qhov siab tshaj plaws, ci ntsa iab yog ib lub tswm ciab ib square meter (cd / m2) ua qhov ntsuas ntawm kev ntsuas, ua kom qhov ci ntsa iab muaj ob hom: txhim kho lub LCD vaj huam sib luag lub teeb kis; lwm tus yog ntxiv rau qhov teeb ci yav dhau los. Tsub kom muaj qhov sib npaug ntawm qhov sib npaug ntawm qhov kev tshuaj ntsuam yog tib qho chaw thaum lub ci ci (dawb) thiab tsaus (piv) ntawm qhov ci, qhov sib txawv ntawm siab txhais tau hais tias ci ntsa iab kuj siab thiab xim zoo li.

8) Qhov teeb meem kev sib txuas ntawm lub teeb duab, cov duab LCD, feem ntau yog siv ob lub tswv yim teeb liab: tus qauv analog VGA 15 koob yam D interface (15, tus pin, D-sub) thiab DVI input interface.

9) LCD pixels hu ua pixels yog xijpeem duab qhia tau hais tias, LCD tseem yog ib qho taw tes rau ntawm qhov xim ntawm tib xim (feem ntau taw tes rau ntsuab thiab xiav rau ntau tshaj).

Lub CRT saib yog muab coj los piv nrog cov npo LCD

Sib piv cov CRT saib nrog lub npo npo zoo tib yam, peb pom tau hais tias tus qub LCD muaj ob qho kev tsis zoo:

1) Thaum twg tus npo LCD los ntawm ib qho kev pom, nws yuav pom qhov poob ntawm kev ci ntsa iab (tsaus ntuj thiab lub cev). Cov ntawv qhia LCD nthuav dav feem ntau muaj 90 degree saib, uas yog, 45 degrees ntawm txhua sab ntawm sab laug / sab xis.

2) Cov ntxaij vab tshaus coj mus ceev tau pom feem ntau hauv cov yeeb yaj kiab thiab kev ua si, tab sis qhov kev thov no tsis muaj nyob hauv cov lus teb rau cov sij hawm qeeb lcds. Lub sij hawm qeeb qeeb heev tuaj yeem ua rau duab distortion thiab kev tsis pom zoo. Cov feem ntau pom tseeb yog qhov kev lag luam nyob rau hauv kev ua lag luam thiab duab ntawm lub dav hlau ya hla lub zos nyob rau hauv qhov kev ua si, qhov twg duab nce qib thiab kev tshwm sim tshwm sim.

Qhov zoo ntawm cov siv lead ua kua yog:

1) Cov ntsiab lus siab, kev ci ntsa iab, cov duab tiag tiag, zoo tshaj thiab nplua nuj uas muaj peb sab, yog thawj lub tswv yim ntawm LCD TV rau cov neeg saib.

2) Lub teeb, kev txuag lub zog, tsis muaj qhov muag, tsis muaj hluav taws xob yog ib qho tseem ceeb muag khoom ntawm disdain rau cov tshuaj CRT TV LCD TV.

3) Nyob rau tib lub sij hawm, lub interface ntawm LCD TV yog tseem nplua nuj heev, txuas nrog lub computer, DVD thiab lwm yam suab thiab video khoom, tam sim no ib co manufacturers yuav tau integrate cov kev ua ntawm cov ntawv nyeem ntawv eeb rau hauv LCD TV, cov LCD TV muaj ntau digital. Tsis tas li ntawd, qhov kev tso kawm ntawm LCD TV los kuj tseem yog heev, yuav muab tso rau ntawm phab ntsa, tuaj yeem tso rau saum qab nthab, neeg pw hauv txaj, koj tuaj yeem pom cov duab.