Tsev > Exhibition > Ntsiab lus

Qhov txawv ntawm LED thiab LCD-TFT kua Crystal kua

Aug 12, 2017

LED (Lub teeb Diode Emitting), tab sis nws kuj siv tau ua ib qho khoom, tab sis feem ntau yog siv rau cov vijtsam loj loj, xws li sab nraud lub tsev ntawm cov billboards loj thiab ntxiv rau.

TFT yog ib yam khoom siv ntawm cov kua siv ua kua, cov yeeb yaj kiab, Transistor cov yeeb yaj kiab, thiab ntxiv rau TFT, UFB thiab STN khoom, thiab lwm yam, tab sis zoo li cov xov tooj txawb, phau ntawv hu ua computer, PDA, digital cameras thiab lwm yam feem ntau siv yog TFT, qee cov laus xov tooj txawb siv tau siv STN screen.


LED tus txheej txheem cej luam

LED (Lub teeb Emitting Diode) ib lub teeb emitting diode, ib lub xeev khoom siv hluav taws xob uas hloov cov hluav taws xob ncaj qha mus rau hauv lub teeb. Lub plawv ntawm lub plawv yog ib yam khoom siv hluav taws xob, ib qho kawg uas yog txuas rau lub tsho, ib qho kawg yog qhov tsis zoo, thiab lwm qhov txuas nrog lub zoo electrode ntawm lub hwj chim los ua kom tag nrho cov wafer nrog epoxy re. Semiconductor wafers muaj ob ntu, ib qho yog P hom semiconductor, nyob rau hauv lub qhov taub, thiab lwm yam kawg yog N hom semiconductor, uas yog cov hluav taws xob ntawm no. Tab sis thaum ob lub semiconductors txuas nrog, lawv ua tus "PN" txuas. "Thaum lub sij hawm tam sim no dhau los ntawm cov xaim ua rau tus ntiv tes, cov electrons raug thawb mus rau thaj av P. Hauv cheeb tsam P, electrons muab lub qhov thiab tom qab ntawd emit zog nyob rau hauv daim ntawv ntawm photons, uas yog lub hauv paus ntawm LED luminescence Lub wavelength ntawm lub teeb, uas yog, xim ntawm lub teeb, yog txiav txim los ntawm cov khoom uas tsim cov PN hlaub.


LED keeb kwm

50 xyoo dhau los, tib neeg twb to taub cov kev paub yooj yim tias cov ntaub ntawv semiconductor tuaj yeem tsim teeb. Thawj lub teeb duab coj los ua nyob rau hauv 1960. Cov teeb meem no yog lus Askiv lub teeb emitting diode (lub teeb emitting diode), nws cov qauv siv yooj yim yog cov ntaub ntawv electroluminescentsemiconductor, muab tso rau ntawm lub xov hlau, ces khi nrog epoxy resin ncig lub pob khoom, thiaj li tiv thaiv tau Internal roj teeb, yog li tus seismic kev kawm ntawm LED zoo.

Qhov tseem ceeb ntawm cov LED yog ib lub wafer uas yog hom P cov ntsiab lus thiab hom N semiconductors. Nws muaj ib qho kev hloov ntawm P hom khoom nruab nrab ntawm cov P thiab N hom ntawv nquag tshuab, hu ua PN nkag. Nyob hauv qee cov PN cov haujlwm ntawm cov khoom siv ntawm semiconductor, cov neeg tsav tsheb tsawg ntawm cov koob txhaj tshuaj ua ke nrog cov neeg feem coob tuaj tso tawm ntau lub zog hauv daim ntawv ntawm lub teeb, uas hloov cov hluav taws xob ncaj qha mus rau lub teeb zog. Thaum lub PN hlw kom qis dua qhov tsis muaj zog, cov cab neeg tsawg tsawg yog nyuaj rau hno, vim li ntawd nws tsis tawm lub teeb. Lub diode, uas ua los ntawm kev tso cai ntawm electroluminescent, yog hu ua lub teeb-emitting diode, feem ntau hu ua LED. Thaum nws ua txoj haujlwm zoo (uas xaus nrog rau pem taub hau), qhov tam sim no ntws los ntawm LED anode cathode, semiconductor iav ntawm qhov teeb meem los ntawm ultraviolet mus rau sab qaum lub teeb ntawm txawv xim lub teeb thiab lub zog ntawm qhov tam sim no.

Pib, LED tau siv los ua qhov ntsuas lub teeb rau cov twj paj nruag thiab ntsuas. Tom qab ntawd, ntau lub teeb pom muaj xim LED tau siv rau hauv kev sib txig sib txig thiab chaw saib loj saib loj, uas ua tau zoo heev rau nyiaj txiag thiab kev pabcuam. Siv 12 nti teeb liab teeb, piv txwv li, nyob hauv Teb Chaws Asmeskas thaum siv lub neej ntev, muaj teeb ci 140 watt incandescent teeb ua lub teeb ci, uas ua rau 2000 lumens ntawm lub teeb dawb. Tom qab lub lim liab, lub teeb ploj yog 90%, tawm tsuas yog 200 lumens ntawm lub teeb liab. Nyob rau hauv cov qauv siv tshiab, Lumileds ntiav 18 xim liab teeb ci, nrog rau hluav taws xob

Kev poob, nrog rau kev siv zog tag nrho ntawm 14 watts, tuaj yeem ua rau tib lub teeb pom kev zoo. Lub teeb liab lub teeb nraub qaum kuj yog ib qho tseem ceeb ntawm cov teeb meem ntawm LED qhov hluav taws xob.

Rau kev teeb pom kev zoo, tib neeg xav tau lub teeb dawb. Nyob rau hauv 1998, lub teeb LED dawb twb tau tsim. Cov LED yog qhia los ntawm encapsulating GaN chips nrog yttrium aluminium garnet (YAG). GaN chips emit xiav teeb (lambda p = 465nm, Wd = 30nm), sintered thaum kub, thiab Ce3 + YAG phosphors emit daj teeb tom qab excitation los ntawm no xiav lub teeb, nrog lub siab dav ntawm 550nm. Blue chip ntsia nyob rau hauv lub LED raws wanxingreflection nyob rau hauv cov kab noj hniav uas them nrog ib tug txha mixed nrog nyias films ntawm YAG, txog 200-500nm. Lub teeb xiav uas tau tawm ntawm cov hluav taws xob substrate absorbed los ntawm phosphor, thiab lwm feem ntawm lub teeb xiav yog tov nrog lub teeb daj tawm ntawm phosphor, kom lub teeb dawb thiaj li tau. Tam sim no, rau InGaN / YAG dawb LED, los ntawm kev hloov cov tshuaj muaj pes tsawg leeg ntawm YAG phosphor thiab kho lub thickness ntawm phosphor txheej, lub teeb dawb ntawm xim kub 3500-10000K tuaj yeem tau txais. Txoj kev ntawm lub teeb dawb los ntawm xiav teeb LED muaj qhov zoo ntawm qhov yooj yim qauv, tus nqi qis thiab kev paub zoo heev, yog li cov qauv hluav taws xob muaj feem ntau daim ntawv thov.

Nyob rau hauv 60s ntawm lub xeem lub xeem, scientific thiab hauj lwm ua hauj lwm tsim LED LED siv lub hauv paus ntawm semiconductor pn hlawv lub teeb emitting. Lub LED tau pib ua ntawm GaASP, nws cov xim emitting liab yog liab. Tom qab ze li ntawm 30 xyoo ntawm txoj kev loj hlob, tam sim no peb tau paub txog LED, tau muab daim liab, txiv kab ntxwv, daj, ntsuab, xiav thiab lwm yam xim. Txawm li cas los xij, lub teeb dawb teeb pom kev zoo rau cov duab taws teeb tsa tau tsuas yog tsim nyob rau hauv xyoo tas los. Ntawm no peb ua kom pom lub teeb dawb LED rau lub teeb pom kev zoo.


1, txoj kev sib raug ntawm cov spectrum ntawm pom lub teeb thiab LED dawb lub teeb. Raws li peb pom, wavelength ntau ntawm lub teeb spectrum yog 380nm ~ 760nm, uas yog xya chromatic lub teeb uas tuaj yeem pom tau los ntawm tib neeg lub qhov muag - liab, txiv kab ntxwv, daj, ntsuab, cyan, xiav thiab ntshav, tab sis txhua xya xim yog lub teeb ci monochromatic. Piv txwv, lub ncov siab ntawm lub teeb liab uas ua los ntawm LED yog 565nm. Nyob rau hauv pom lub teeb spectrum tsis yog lub teeb dawb, vim hais tias dawb tsis yog monochromatic teeb, tab sis lub teeb composite los ntawm ntau yam monochromatic teeb lub synthesis, raws li lub teeb lub hnub yog tsim ntawm xya hom ntawm monochromatic thiab dawb lub teeb, dawb lub teeb xim TV yog tsim ntawm peb lub ntsiab xim ntawm liab, ntsuab thiab xiav synthesis. Yog li, kom LED emit dawb lub teeb, nws cov yam ntxwv spectral yuav tsum muaj tag nrho pom spectral tag nrho. Tab sis yuav tsum ua li no hom ntawm LED, nws yog tsis yooj yim sua raws li tam sim no tus txheej txheem. Raws li kev tshawb nrhiav ntawm pom lub teeb, qhov muag tib neeg pom tau dawb, tov nrog tsawg ob lub teeb, ob lub teeb emitting wavelength (xiav teeb thiab daj lub teeb emitting wavelength) los yog peb (xiav lub teeb + + lub teeb liab teeb liab) qauv. Lub teeb ci yuav tsum muaj rau txhua hom ob lub teeb dawb, yog li qhov kev nce qib ntawm xiav teeb tau los ua lub tshuab tseem ceeb rau tsim hluav taws xob, tshuab Blu-ray tshuab ciav hlau los ntawm cov tuam txhab loj LED. "Lub thoob ntiaj teb" Blu ray "tsuas yog siv tes manufacturers, xws li Nyiv, Nyiv lub Nichia tshuaj synthesis, TOYOTA CREE ntawm America, Lub teb chaws Yelemees OSRAM, yog li dawb daim ntawv thov LED, tshwj xeeb tshaj yog cov high brightness dawb LED kis tau rau hauv Suav teb muaj ib txoj kev.

2, dawb LED txheej txheem qauv thiab dawb lub teeb pom kev zoo. Rau kev teeb pom kev zoo, cov dawb LED feem ntau yog tsim nyob rau hauv ob txoj hauv kev txheej txheem. Thawj yog kev siv lub tshuab xiav lub teeb los ua kom phimpha kom ua rau lub teeb dawb; qhov thib ob yog ntau yam monochromatic lub teeb sib tov. Cov ob hom no

Txoj kev ua tau zoo los ua cov khoom siv dawb. Cov txheej txheem qhia tawm hauv daim duab 1 ua ntej yuav tsim cov teeb ci dawb, xiav chip LEDGaM daim duab (2 p = 465NM), thiab YAG (yttrium aluminium garnet) phosphor pack ua ke, thaum lub teeb daj daj tuaj yeem siab ntawm xiav lub teeb thiab xiav thiab daj sib tov ua ke dawb ua teeb pom kev zoo (muaj cov qauv ntawm cov txheej txheem xws li qhia hauv daim duab 2). Qhov thib ob txoj kev siv cov xim sib txawv ntawm cov ntiv tes los ua ke thiab ua kom pom lub teeb dawb los ntawm txhua qhov ntxoov ntxoo ntawm lub teeb.

3. Daim ntawv thov foreground ntawm lub teeb ci teeb pom kev zoo tshiab lub teeb ci tshiab. Yuav kom piav qhia txog cov yam ntxwv ntawm cov teeb ci dawb, ua ntej saib tam sim no qhov teeb pom kev zoo. Cov roj teeb thiab cov roj teeb halogen tungsten muaj kev zoo ntawm 12 ~ 24 lumens / watt, thiab kev ua kom muaj teeb pom kev zoo ntawm cov roj teeb thiab HID teeb yog 50 ~ 120 lumens / watt. Cov dawb LED: nyob rau hauv 1998, lub teeb dawb LED tsuas yog 5 LM / W, nyob rau hauv 1999 tau mus txog 15 LM / W, qhov kev ntsuas no zoo ib yam li tsev neeg cov roj teeb hluav taws xob, thiab nyob rau hauv 2000, lub teeb ua ntawm cov dawb LED tau mus txog 25 LM / W, qhov Performance index thiab lub tungsten halogen teeb zoo sib xws. Ib co tuam txhab lag luam kwv yees hais tias los ntawm 2005, cov teeb pom kev zoo ntawm LED ntawm 50 lumens / watt, los ntawm 2015, qhov kev ntsuas hluav taws xob hauv lub LED yuav tsum tau mus txog 150 ~ 200 lumens / watt. Lub sijhawm ntawd, kev ua haujlwm tam sim no ntawm lub teeb dawb LED tuaj yeem ncav cuag qib siab. Yog li, txoj kev loj hlob ntawm cov neeg dawb sau ntawv siv teeb pom kev, yuav ua tau qhov tseeb.

Incandescent yaj thiab cov roj teeb halogen rau kev teeb pom kev zoo tab sis pheej yig, tab sis cov teeb pom kev tsis tshua muaj zog (khib nyiab loj thermal effect teeb), kev pab cuam luv luv rau lub neej, txij nkawm workload, tiam sis yog siv cov dawb LED teeb pom kev zoo, lub neej (ntau tshaj 100000 teev ntawm kev ua haujlwm nrawm), yuav luag tsis muaj txij nkawm. Tam sim no, lub tuam txhab German Hella LED tsim siv lub teeb dawb nyeem ntawv nyeem ib txoj kev teeb; Australian capital Canberra tau siv lub teeb coj dawb LED teeb; nroog tsheb tswj hauv Suav teb kuj yog LED dawb los hloov thaum ntxov ntawm cov tsheb khiav teeb. Nws yog kev pom zoo tias yav tom ntej, LED lub teeb dawb yuav nkag mus rau tsev neeg los hloov cov teeb uas twb muaj lawm.

LED teeb ci nrog rau kev siv hluav taws xob tsawg tsawg, kev siv hluav taws xob qis, muaj zog nruj, kev ruaj siab ruaj ntseg, lub sijhawm teb ceev ceev, tsis muaj kev puas tsuaj rau ib puag ncig, xim lub teeb, thiab txawm tias tus nqi piv nrog cov khoom siv hluav taws xob uas twb muaj lawm, nws yuav tsis tshua muaj teeb pom kev zoo.


TFT

(Thin Film Transistor) yog hais txog cov dej siv lead ua kua dej uas siv ua kua pixel pixel los ntawm cov yeeb yaj kiab zaj duab xis transistor tom qab nws. Yog li, kev kub ceev, siab tshaj plaws thiab siab sib piv cov lus qhia screen yuav ua tiav. Tus TFT yog tus ciaj sia siv ua kua dej ua kua.

Ntxiv: TFT (ThinFilmTransistor) hais txog ib zaj duab xis nyias nyias, uas txhais tau hais tias txhua cov kua siv lead ua pixel muaj li ntawm cov yeeb yaj kiab sib txuam transistor hauv pixel rov qab tsav, uas tuaj yeem ncav cov kev kub ceev, siab ci thiab siab contrast cov lus qhia screen, LCD yog qhov zoo tshaj plaws ntawm cov xim zaub ntaus, cov nyhuv yog ze rau ntawm CRT zaub. Tam sim no lub tshuab hluav taws xob hauv xov tooj thiab cov khoom siv duab. Txhua pixel ntawm TFT yog tswj los ntawm TFT kev nrog rau nws tus kheej, uas yog lub tshuab pixel. Yog li ntawd, tsis yog tsuas yog ceev tau zoo heev, tab sis kuj qhov sib piv thiab ci ntsa iab tau zoo heev, thiab qhov kev daws teeb meem tau tseem mus txog theem siab.

TFT (Thin Film Transistor) npo, nws yog tam sim no dav siv nyob rau hauv high-kawg mobile xov tooj, 65536 xim thiab 260 txhiab xim, 16 lab xim peb, cov zaub yog zoo heev.

TFT technology tsom xam

TFT (Thin, Film, Transistor) LCD, nyhuv zaj duab xis nyhav transistor LCD, yog ib yam ntawm cov qauv siv roj ntsha (AM-LCD).

Tsis zoo li TN technology, lub TFT siv siv hom "rov qab" ntawm lub teeb taws - qhov hypothetical lub teeb txoj kev, tsis los ntawm sab saum toj mus rau hauv qab li TN LCD, tab sis txij li hauv qab. Nyob rau hauv no txoj kev, lub teeb tshwj xeeb lub teeb yog npaj nyob rau sab nraum qab ntawm cov kua siv lead ua kua, thiab lub teeb ci tuaj sab nraud los ntawm qis sab polarizing phaj. Qhov electrode hauv kev sib tw hauv FET electrode thiab cov electrode, cov FET electrode tau ua, qhov kev ua tau ntawm cov kua qaub deg ua kua hloov yuav hloov, yuav muaj teeb thiab shading mus ua kom tiav lub hom phiaj ntawm cov yeeb yam, lub sijhawm teb nce mus txog 80ms . Vim tias nws siab dua TN-LCD zoo ib yam thiab ntau dua cov yeeb yuj, kev tshuaj ntsuam ceev dua tshiab, lub TFT hu ua "tseeb xim".

Muab piv rau DSTN, lub ntsiab feature ntawm TFT-LCD yog siv lub teeb nruab nrab ntawm lub tshuab hluav taws xob rau txhua lub pixel. Vim tias txhua pixel tuaj yeem tswj tau ncaj qha los ntawm point pulse. Yog li ntawd, txhua txoj ntawm kuj ywj siab thiab tswj tau tsis tu ncua. Txoj kev tsim qauv no tsis yog pab txhawb kev ceev ceev ntawm lub vijtsam npo, tab sis kuj tswj cov theem grey level meej. Qhov no yog vim li cas qhov TFT xim zoo tshaj qhov DSTN.

Tam sim no, feem coob ntawm phau computer computer chaw tsim khoom siv cov khoom siv TFT-LCD. Thaum TFT-LCD thaum ntxov tau siv rau qhov siv thiab ua cov computers. Txawm hais tias TFT tau zoo dua DSTN thaum lub sij hawm ntawd, vim yog qhov laj thawj, TFT-LCD muaj qhov sib txawv loj rau lub sij hawm teb, ci ntsa iab, thiab qhov pom piv rau cov cim CRT. Coupled nrog ib tug tsawg tawm los, ua rau nws cov nqi siab, desktop TFT-LCD ua unattainable.

Txawm li cas los xij, nrog rau kev siv tshuab txuas mus ntxiv, qhov nce tuaj, qhov tshwm sim ntawm ib co tshuab tshiab thiab ua rau TFT-LCD tau ua kom tau zoo nyob rau lub sijhawm teb, qhov sib txawv, ci ntsa iab, pom lub voj voos, thiab nqaim qhov sib txawv ntawm cov kab CRT zaub qhov . Niaj hnub no, lub sij hawm teb ntawm feem ntau mainstream LCD tus saib xyuas yog qis dua 50ms, uas paves txoj kev LCD rau mainstream.

LCD daim ntawv thov kev lag luam yuav tsum tau hais kom muaj peev xwm zoo. Tab sis vim hais tias muaj peev xwm ntawm cov npoo ntawm LCD, lub ntiaj teb txoj kev LCD yog cov concentrated nyob hauv Suav teb, Taiwan, Kauslim thiab Nyiv, peb qhov loj qhov loj hauv paus. Asia yog lub LCD vaj huam sib luag tshawb nrhiav thiab kev tsim khoom thiab kev tsim khoom, thiab Taiwan, Nyiv, Kauslim Teb, peb qhov chaw loj ntawm kev loj hlob txawv.

Tam sim no, mainstream TFT vaj huam sib luag muaj ib tug - Si (amorphous silicon nyias zaj duab xis transistor)


TFT-LCD tshuab


Rau hauv lub xyoo txhiab xyoo, raws li ib feem tseem ceeb ntawm cov ntaub ntawv kev lag luam - cov cuab yeej cuab tam tau ceev cov txheej txheem ntawm nws cov flattening. Tam sim no, lub ntiaj teb tau nkag mus rau lub caij nyoog "cov ntaub ntawv qhia tawm", cov cuab yeej technology thiab cov qauv hauv kev loj hlob cov txheej txheem ntawm cov ntaub ntawv siv technology yog ib qho tseem ceeb heev, TV, khoos phis tawj, mobile xov tooj, pager, PDA cov cuab yeej txuam thiab niaj hnub lub neej thiab haujlwm ntawm txhua hom ntawm cov twj paj nruag ntawm cov khoom rau tib neeg los muab ntau yam ntaub ntawv. Tsis muaj ib lub monitor, yuav tsis muaj cov kab ntawv loj hlob zuj zus

Cov txheej txheem paj. Cov zaub, uas ua ke ntawm cov khoom siv hluav taws xob, kev sib txuas lus thiab cov ntaub ntawv siv technology, yog qhov tseem ceeb dua rau kev lag luam hauv electronics tom qab lub xyoo pua Century microelectronics thiab computers.

Kev nthuav tawm ntawm kev tshawb fawb thiab kev siv technology hloov sai, pom cov tshuab tau tsim ib qho kiv puag ncig, tshwj xeeb tshaj yog txij li 90s, nrog kev loj hlob sai ntawm technology kov yeej thiab kev lag luam coob, kom cov kua siv ua kua (LCD) vaj huam sib luag zaub (FPD) ua tus sawv cev ntawm lub nce siab ntawm kev siv tshuab. Raws li Stanford txoj kev ua lag luam, FPD kev lag luam loj hlob ntawm ib xyoo twg ntawm 16.2%, 2000 FPD thiab CRT kev lag luam tau nce 30 billion USD, CRT qhov nruab nrab txhua xyoo kev loj hlob ntawm tsawg dua 6.3%, qhov nruab nrab qhov kev loj hlob qis tshaj li ntawm FED , thiab FPD kev loj hlob tus nqi tseem zoo ntxiv, tseem poob qis dua CRT, tsis yog ntawm kev sib txawv heev, yuav hais tau tias cov khoom vaj huam sib luag yuav ua tus qauv siv tshuab hauv lub xyoo pua nees, kev lag luam thiab kev lag luam nyob rau hauv lub nruam nthuav.

Tom qab ntau tshaj li 20 lub xyoos ntawm kev tshawb fawb, kev sib tw thiab kev loj hlob, cov khoom vaj huam sib luag rau plawg tau nkag mus rau hauv lub ntsiab ntawm cov khoom hauv lub xyoo pua tshiab. Tam sim no, muaj plaub yam lus qhia txog kev sib txuam nrog cov sib txeeb sib kis ceev tshaj plaws:

1, daim teb emission vaj huam sib luag (FED);

2 plasma vaj huam sib luag rau zaub (PDP);

3. Cov khoom siv hluav taws xob yeeb yaj kiab (electroluminescent) (OEL);

4 nyias zaj duab xis transistor kua siv lead ua vaj huam sib luag (TFT-LCD).

Cov pa roj carbon monoxide poov xab yog qhov sib npaug ntawm cov khoom siv hluav taws xob (EFS), VGA daws teeb meem (640 x 480 x 3) cov kev xav tau yuav tsum tau 921 txhiab thiab 600 qhov kev ua tau zoo rau lub tshuab hluav taws xob (micro electron emission material technology) uas yuav tsum tau ua kom tawg. Tam sim no, Tebchaws Asmeskas thiab Fabkis muaj tsawg tsawg ntawm cov khoom me me, siv rau kev lag luam ntawm teb chaws, tsis txhob ua industrialization thiab commercialization.

Lub plasma lub teeb emitting zaub yog tsim los ntawm cov ntshav tawm ntawm cov kua tawm ntawm cov kua xaim pum ntawm lub tshuab nqus tsev me me, tsis muaj hwj chim ntau thiab cov luminous cov nyhuv yog nws cov kev tsis zoo (tsuas yog 1.2lm / W, thaum kev ua haujlwm zoo tshaj 80lm / W, nrog lub teeb ntawm 6 watts ntawm ib square inch inch cheeb tsam), tab sis nyob rau hauv 102 ~ 152cm kab pheeb ces kaum loj npo tso tawm muaj lub zog muaj kev sib tw zoo hauv lub tshav pob. Kev lag luam kws tshawb nrhiav, CRT, LCD thiab digital micro daim iav (DMD) 3 daim duab tso tawm nrog PDP kev sib tw, los ntawm kev lag luam loj hauv TV, CRT TV nqi pheej yig dua cov PDP, PDP yog cov neeg muaj zog tshaj plaws, tab sis qhov ci ntsa iab thiab clarity PDP, LCD thiab DMD ntawm kev tawm ntawm pixel thiab tus nqi tam sim no kuj tsis muaj kev sib tw kom zoo dua. Txawm hais tias PDP nyob rau hauv cov duab xim zoo nkauj, qhov pom thiab qhov muaj peev xwm thiab lwm yam zoo li tau zoo tuaj, tiam sis nws qhov kev ua kom zoo, ci ntsa iab, qhov sib txawv tsis yog nyob rau hauv lub TV uas tseem ceeb tshaj plaws, qhov tseem ceeb tshaj plaws yog tus nqi tsis txais los ntawm feem coob ntawm cov neeg hauv teb chaws , uas kom qee yam, txwv cov xim PDP kev lag luam. Tam sim no, daim ntawv thov ntawm cov xov xwm hauv pej xeem tau pib ua nrov.

Ib qho hluav taws xob ntawm lub teeb hluav taws xob (LED) pom cov qauv ntawm txoj kev loj hlob zoo ntawm GaN xiav lub teeb tsa emitting diode, uas tau ua rau kev tswj kev loj ntawm lub vijtsam loj video tso tawm kev ua lag luam, tab sis cov duab tsuas yog tsim rau cov qhov rooj loj loj, zaub tsis yog nws txoj kev ua lag luam.

Kws txawj ntse nyob hauv txoj kev lag luam tso saib tau tos ntsoov

Nyias zaj duab xis electroluminescent muab tseeb daim ntawv - zoo li nyias qhia. Organic nyias zaj duab xis electroluminescent tseeb, lub teeb thiab nyias, tsis muaj zog, dav saib sab nrauv, siab siab ceev ceev (sub subtle) khoom seem hauv seem vaj huam sib luag. Tus nqi ntawm cov khoom loj loj muaj tsawg kawg nkaus thiab cov kev pab cuam lub neej tsuas yog ob peb txhiab teev xwb. OLED yuav yog thawj tus neeg sib tw rau TFT-LCD hauv lub neej yav tom ntej, tab sis nws tseem nyob rau theem tshawb fawb thiab kev tsim khoom.

Cov kua siv ua kua teeb pom kev zoo, tshwj xeeb tshaj yog TFT-LCD, tam sim no tsuas yog thiab tso ntau dua CRT tag nrog cov kev kawm zoo ntawm ci ntsa iab, qhov sib piv, lub zog, lub neej, qhov loj me thiab qhov hnyav, nws qhov kev ua tau zoo, cov khoom, qib siab ntawm automation, cov ntaub ntawv raw, cov nqi qis, qhov chaw dav rau kev loj hlob, yuav dhau mus ua cov ntsiab lus ntawm lub xyoo tshiab, nws yog ib qho tseem ceeb ntawm lub xyoo pua nees nkaum lub ntiaj teb kev loj hlob.

2. TFT-LCD

Hauv kev sib txeeb ntawm ntau lub rooj sib txig sib txoos, vim li cas TFT-LCD yuav tuaj yeem sawv ua ib lub cim tshiab ntawm cov khoom tso tawm, yog los ntawm tsis muaj qhov yuam kev, yog qhov kev sib txawv ntawm tib neeg siv technology tsim thiab xav hom kev txhim kho. Cov kua siv lead ua kua muaj kev tiv thaiv qhov teeb meem luminescence, thiab tau siv cov kua siv lead ua lub teeb pom kev zoo ua rau lub teeb pom kev zoo ntawm lub teeb pom kev ua rau ob qho, namely, lub teeb ci thiab kev tswj ntawm lub teeb ci. Raws li lub teeb ci, kev ua tau zoo kawg nkaus tau ua tiav, tsis muaj teebmeem luminous, puv xim, lossis kev ua haujlwm ntev, thiab tseem qhov tob. Txij li ntawm qhov tsim tawm ntawm LCD, qhov kev tiaj tus tau zoo dua qub los ntawm monochrome rau xim, ntawm tuab mus nyias, los ntawm sab Fluorescent mus rau lub vaj huam sib luag fluorescent. Qhov tseeb tshwm sim hauv lub teeb pom kev zoo yuav muab lub LCD nrog lub nrig tshiab. Nrog rau txoj kev tsim lub teeb ci tshuab, tshiab thiab zoo dua pom lub chaw yuav tshwm sim thiab muab tso rau LCD. Tus so yog qhov chaw tswj, kev siv hluav taws xob thiab cov tshuab xa hluav taws xob hloov ntawm txoj kev loj hlob ntawm cov yeeb yaj kiab zaj duab xis transistor (TFT) zaub nrog LCD zaub, thiaj li hais tias qhov ua tau zoo yuav ua tau tiav


1 . TFT ua haujlwm thawj coj


(1) qhov kev ua haujlwm ntawm TFT TFT yog "Thin Film Transistor" xa mus rau feem ntau yog hais txog cov yeeb yaj kiab ua kua dej, uas tau hais txog thin film transistor (matrix) - tuaj yeem ua "active control" ntawm tus neeg pixels qhov screen, uas tseem hu ua TFT (active matrix TF matrix matrix). Yog li cas tus duab tuaj txog? Cov ntsiab cai yooj yim yog yooj yim: cov zaub yog ua los ntawm ntau pixels uas yuav tuaj yeem tawm xim xim ntawm lub teeb, tsuav koj tswj txhua tus pixel mus tso saib cov xim sib luag, koj tuaj yeem ua tau koj lub hom phiaj. Nyob rau hauv TFT LCD backlight tshuab feem ntau siv, kom tswj txhua pixel xim thiab ci ntsa iab yuav tsum tau nruab ib qhov kev sib txuas zoo li qub tom qab txhua lub pixel, thaum lub caij qhib ntim, thiab "qhov muag" kaw tom qab lub teeb tsis tuaj yeem dhau los. Ntawm chav kawm, technically, nws yog tiag tsis yooj yim li nws yog. LCD (Kua, Crystal, Zaub) yog siv cov kua siv lead ua kua (thaum rhuab li ua kua, txias crystallization ua ib yam khoom hauv lub xeev), cov kua siv dav ua kua muaj peb hom:

Zoo ib yam li cov av nplaum txheej (Kab ua kua) cov kua nplaum

Zoo sib xws

Ib qho ua kom zoo nkauj (Nematic) kua ua kua (crystal)

Cholesteric Cholesteric (Cholestre) cov kua ua kua

Kev siv kua siv ua kua (crystal display) yog ntxhov siab, thaum qhov chaw sab nraud hloov nws cov qauv molecular hloov, uas muaj lub zog siv hluav taws xob tau los ntawm los yog cia lub teeb nris thaiv lub teeb rau ntau yam ntxwv - ib yam li qhov.

Koj paub lub ntsiab xim, yog li txhua pixel ntawm kev tshuaj ntsuam yuav tsum tau tsim ntawm peb yam uas zoo sib xws, uas yog liab, ntsuab thiab xiav, feem ntau, peb xim.

Feem ntau yog siv TFT TFT TFT (Twisted Nematic LCD) yog qhov ntau tshaj plaws, thiab daim duab hauv qab no qhia txog txoj cai ua haujlwm ntawm hom zaub no. Lub tshuab tamsis no yeej sib txawv thiab yuav piav qhia nyob rau hauv kev nthuav dav hauv seem thib ob hauv tsab xov xwm no.

Lub qaum thiab qis ob txheej yog muab nrog grooves, nyob rau hauv, lub grooves rau hauv txheej txheej txheej txheem nyob rau hauv ib txoj hauv kev longitudinal, hos cov txheej sab nraud yog txheej txheem. Cov theem sab nraud yog txheej txheem. Thaum tsis nyob rau hauv lub xeev ntuj tom qab qhov voltage ntawm cov kua siv lead ua kua, lub teeb emitting los ntawm daim duab 2A twisted nematic TFT display cai tso schematic txheej dhau lub teeb sib txawv los ntawm kev tawm tsam tshwm sim nyob rau hauv 90 degree twist, uas yuav ntseeg nkaws los ntawm qis.

Thaum qhov voltage ntxiv ntawm ob cov khaubncaws sab nraud povtseg, lub tebchaw ua hluavtaws raug tsim tawm, thiab cov kua siv ua kua ua kom muaj teebmeem kom lub teeb tsis tig - thiab qhov tshwm sim yog qhov teeb tsis dhau ntawm qhov txheej qis.


(2) TF


Cov xim lim dej yog muab faib ua peb xim: xim liab, ntsuab thiab xiav. Lawv npaj rau ib lub iav substrate, sib sau ib txheej (dot, pitch) sib nug xov mus rau ib qho pixel, thiab txhua lub lim dej monochromatic hu ua sub-pixel. Qhov ntawd yog, yog tias TFT zaub txhawb zog siab tshaj plaws ntawm 1280 * 1024 daws teeb meem, ces yuav tsum muaj tsawg kawg yog 1280 x 3 x 1024 sub pixels thiab transistors ntxiv. Rau ib tug 15 nti TFT zaub (1024 x 768) ces ib pixel yog li 0.0188 ntiv (sib npaug 0.30mm), rau 18.1 nti TFT zaub ib sab (1280 * 1024), yog 0,011 nti (sib npaug rau 0.28 hli)

Raws li koj paub, pixels yog decisive rau cov zaub, thiab tus me me txhua pixel, ntau dua qhov daws teeb meem uas tus saib xyuas tau ncav cuag. Txawm li cas los xij, vim lub cev tsis muaj zog ntawm transistors, qhov luaj li cas ntawm txhua lub pixel hauv qhov TFT tam sim no 0.0117 nti (0.297mm), yog li rau 15 nti saib, qhov kev daws teeb meem tsuas yog 1280 * 1024


2, TFT kev nta


(1) TFT technology tsim nyob rau xyoo 1990, kev siv cov ntaub ntawv tshiab thiab cov cuab yeej tshiab ntawm cov khoom siv hluav taws xob hauv nruab nrab ntawm cov khoom siv hluav taws xob, kua siv lead ua kua (LC), cov pa roj carbon dioxide thiab organic organic electroluminescent (EL thiab OEL). TFT yog nyob hauv iav los yog yas substrate, xws li tsis yog ib tug ntiv taw (tseem nyob rau hauv cov nplais), los tsim kom muaj cov txheej txheem tshuaj kom tsim nyog rau kev tsim cov khoom loj loj, cov khoom siv hluav taws xob (semiconductor integrated circuit processing through the membrane) (LSIC). Siv cov khoom siv uas tsis yog siv lead ua tau zoo txo nqi, thiab yog qhov kev txuas ntxiv ntawm cov kab kev sib txuas ua ke loj rau cov cheeb tsam loj, ua haujlwm ntau thiab tsawg. Nws yog qhov nyuaj tshaj rau kev tsim TFT ntawm thaj chaw loj ntawm iav los yog yas substrate rau kev tswj cov kev sib tw ntawm IC (LC lossis OLED) dua li ntawm silicon wafer. Kev tsim nyog rau cheeb tsam qhuav (qib ntawm kev huv yog 100), yog

Qhov yuav tsum tau ua kom cov khoom noj zoo (99.999985% ntawm purity ntawm hluav taws xob), qhov yuav tsum tau siv cov cuab yeej ua khoom siv thiab kev siv tshuab muaj ntau dua li cov kev lag luam loj loj, yog cov khoom zoo tshaj plaws ntawm cov khoom siv niaj hnub no. Nws lub ntsiab nta yog:


(1): thaj chaw loj ntawm pib 90s thawj tiam ntawm thaj tsam loj iav substrate (300mm * 400mm) TFT-LCD ntau lawm kab, thawj ib nrab ntawm 2000 iav substrate thaj tsam tau ntxiv rau 680mm * 880mm), nyuam qhuav 950 hli * 1200mm iav substrate yuav muab tso rau hauv kev lag luam. Hauv kev coj, tsis muaj cheeb tsam txwv.


  (2) kev koom ua ke siab: lub 1.3 nti TFT nti rau LCD projection muaj kev daws teeb meem ntawm XGA thiab muaj lab tus pixels. SXGA daws teeb meem (1280 x 1024) tsis siv lead ua silicon 16.1 nti TFT array zaj duab xis thickness tsuas yog 50nm, TAB, IAV thiab SYSTEM rau IAV tshuab, IC kev koom tes ntawm cov khoom siv thiab kev yuav tsum muaj kev, kev nyuaj muaj ntau dua cov txwm LSI.


(3) haib: TFT yog siv los ua qhov teeb meem ntawm qhov chaw nruab nrab ntawm lub cev li ntxov tau los txhim kho lub teeb nrug ntawm cov xim kua qaub. Kev daws teeb meem siab, kev tswj ntawm cov khoom ntawm cov khoom kawm tau los ntawm cov kev cai tswjhwm hluav taws xob hauv 0-6V ntau ntau (feem ntau 0.2 mus rau 4V), ua rau nws ua tau kom muaj txiaj ntsig zoo, siab kawg nkaus. TFT-LCD yog thawj cov qauv vaj huam sib luag tso rau hauv tib neeg li keeb kwm kom pom zoo dua CRT. Tam sim no, tib neeg pib pib muab IC tsav mus rau iav substrate, thiab tag nrho cov TFT yuav muaj zog tshaj, uas yog tsis txaus rau cov txheej txheem loj-teev semiconductor integrated circuit.


(4) luv nqi: iav substrate thiab yas substrate fundamentally daws qhov teeb meem loj ntawm cov txheej txheem loj ntawm semiconductor integrated circuit, thiab qhib qhov chaw dav dav rau daim ntawv teev lus loj rau semiconductor integrated circuit.


(5): ntxiv rau kev siv cov txheej txheem CVD (siv cov tshuaj vapor deposits (MCVD) thiab cov khoom siv cov khoom qub, cov tshuab laser siv tshuab, uas tsim muaj cov duab yeeb yaj kiab amorphous polycrystalline, zaj duab xis, tsim ib leeg siv lead ua zaj duab xis. Tsis tas yuav yog cov yeeb yaj kiab uas yog silicon, tab sis tseem muaj lwm yam thib ob thiab cov pab pawg thib rau hauv cov yeeb yaj duab.


(6) ib daim ntawv teev npe dav dav, LCD vaj huam sib luag tso tawm raws li TFT tshuab yog kev lag luam ntawm cov qauv xov xwm, kev siv technology kuj tuaj yeem siv rau cov yeeb yaj kiab organic transistor loj hlob tuaj hauv cov kev yees duab (photoluminescence) (TFT-OLED) zaub yog nyob rau hauv kev loj hlob sai.


3, lub ntsiab nta ntawm TFT-LCD

Nrog lub maturity ntawm TFT tshuab thaum ntxov 90s, xim LCD vaj huam sib luag zaub tsim tsim. Nyob rau hauv tsawg tshaj 10 xyoo, TFT-LCD tau loj hlob sai heev rau hauv lub ntsiab tso ua ke, uas yog inseparable los ntawm nws zoo. Lub ntsiab nta yog:


1) kev siv cov cwj pwm zoo: tsis tshua muaj hluav taws xob, tsis tshua tsav tsheb, muaj kev ruaj ntseg thiab muaj kev ruaj ntseg zoo tuaj; ca, thiab nyias, txuag ntau ntau cov ntaub ntawv raw thiab siv qhov chaw; tsawg zog siv zog, lub zog noj yog li 1/10 CRT zaub, qhia txog TFT-LCD txawm tias tsuas yog ib feem pua ntawm CRT, txuag ntau zog; TFT-LCD khoom thiab specifications, me me series, ntau yam, saj zawg zog thiab yooj yim mus use, txij nkawm, hloov tshiab, yooj yim rau kev hloov, lub neej ntev kev ua haujlwm thiab ntau lwm yam nta. Cov duab khwv yees cov kab kev siv ntawm 1 ntiv mus txog 40 ntiv, thiab daim duab ntawm dav dav dav dav dav yog lub dav hlau puv npo los ntawm cov xim yooj yim tshaj plaws monochromatic ua cim kom siab, siab xim fidelity, siab ci, siab zoo siab, siab teb lus ceev ceev ntawm cov duab yeeb yaj duab ntawm ntau cov lus; zaub muaj ib hom ncaj nraim ntawm hom kev xav, kev xav, thiab kev xav ntawm hom.


(2) kev tiv thaiv ib puag ncig zoo: tsis muaj hluav taws xob, tsis muaj teeb meem, tsis muaj kev puas tsuaj rau kev noj qab haus huv ntawm cov neeg siv. Tshwj xeeb tshaj tawm ntawm TFT-LCD hauv phau ntawv thiab caij nyoog yuav coj tib neeg mus rau hauv qhov chaw ua haujlwm tsis muaj ntawv thiab tsis sau ntawv luam tawm, ua rau muaj kev cia siab rau tib neeg kev kawm, kev tshaj tawm thiab kev kaw suab ntawm kev sib raug zoo.


(3) qhov ntau ntawm daim ntawv thov yog qhov dav, thiab siv tau rau txhua zaus ntawm qhov kub kub li ntawm -20 DEG C txog +50 DEG C, thiab qhov kub ua haujlwm kub ntawm TFT-LCD ncav tau 80 degrees hauv qab xoom tom qab raug kho kub. Cov qauv siv hluav taws xob yuav siv los ua ib qho khoom dav hlau dav hlau, lub tshuab dav dav dav dav dav, thiab lub vijtsam loj saib TV, thiab yog qhov kev ua haujlwm zoo uas muaj cov duab thaij duab.


(4) lub tshuab hluav taws xob tsim khoom siv siab, thiab cov yam ntxwv ntawm cov khoom loj ua tau zoo yog qhov zoo. TFT-LCD kev lag luam mature technology, huab hwm coj ntau npaum li cas ntawm ntau tshaj 90%.


(5) TFT-LCD yog yooj yim mus integrate thiab hloov tshiab. Nws yog ib qho zoo ua ke ntawm cov txheej txheem loj hauv high-semiconductor integrated circuit technology thiab light source technology, thiab tseem muaj peev xwm zoo rau txoj kev loj hlob. Tam sim no, muaj amorphous, polycrystalline thiab monocrystalline silicon TFT-LCD, yuav muaj lwm yam ntaub ntawv yav tom ntej TFT, ob qho tib si iav substrate thiab yas substrate.