LED daim ntawv sau npe yuav muab faib ua ob pawg: ib qho yog ib daim ntawv thov tib lub raj, nrog rau cov teeb ci ntsa iab LEDs, infrared LEDs, thiab lwm yam .; ib qho yog qhov muag zaub LED. Tam sim no, muaj tseem sib txawv ntawm Tuam Tshoj thiab LED hauv qhov siv ntawm LED cov ntaub ntawv yooj yim, tab sis as far as LED lus muaj kev txhawj xeeb, Tuam Tshoj tus tsim thiab ntau cov tshuab technology ntau heev nyob rau hauv txoj kab nrog cov qauv thoob ntiaj teb.
LED cov zaub yog ib cov qauv ntaus cim uas muaj ib qho array of light emitting diodes. Nws siv qhov qis qis qis qis, uas muaj cov yam ntxwv ntawm kev siv hluav taws xob qis, kev pabcuam ntev, qis dua, qis qis, tsis ua haujlwm, kev saib loj lossis loj thiab kev pom ntev ntev.
Lub ntsiab lus ntawm cov ntawv pom hauv LCD yog ua kua Crystal Display, uas yog tsim los ntawm thawj tsab ntawv ntawm txhua lo lus. Suav yog feem ntau hu ua "kua siv lead ua vaj huam sib luag" los yog "crystal display". Txoj haujlwm ua haujlwm yog siv cov khoom siv lub cev ntawm cov kua siv lead ua kua: qhov kev hloov ua tiav thaum lub zog ua haujlwm, kom lub teeb thiaj yooj yim dhau; thaum lub hwj chim tsis muaj zog, qhov kev hloov kho yog qhov teeb meem, thiab lub teeb yog thaiv, thiab qhov yooj yim taw tes yog qhov cov kua siv lead ua zoo li lub qhov rooj los yog cia lub teeb mus rau. Qhov zoo ntawm LCD yog: Piv rau CRT zaub, qhov zoo ntawm LCD tsuas yog xoom tawg, tsis muaj zog noj, me me dissipation, me me, meej duab restoration, ntse ua cim thiab li ntawm. Muaj ob peb yam yooj yim pointers rau kev yuav khoom LCD: High brightness: Qhov ntau dua qhov ci ntsa iab, ntau qhov duab yuav yog, thiab huab yuav tsis pos huab. Chav tsev ntawm ci ci yog cd / m2, uas yog lub tswm ciab ib square meter. Low-order LCD brightness qhov tseem ceeb yog li tsawg li 150 cd / m2, thaum high-end lus yuav siab li 250 cd / m2. Siab zoo: lub siab dua qhov sib txawv, qhov ntau dua li cov xim, thiab ntau lub tso suab. Conversely, qhov sib txawv ntawm qhov sib txawv, qhov xim tsis zoo, thiab daim duab yuav plag. Qhov txawv ntawm qhov sib txawv ntawm qhov tseem ceeb yog loj heev, xws li tsawg li 100: 1 kom siab li 600: 1 los yog siab dua. Kev saib ntau ntau: Qhov pom tau qhov sib txawv yog qhov yooj yim, xa mus rau ntau yam uas pom tau hauv ntej ntawm qhov screen. Qhov loj dua qhov saib ntau, nws yooj yim dua yog pom. Tus neeg saib xyuas me dua, tus neeg saib xyuas yuav tsis tuaj yeem pom daim duab kom sai li sai tau yog tias tus saib pom pauv txoj kev xav. Kev pom ntau yam algorithm yog ntau yam ntawm cov ces kaum ntawm qhov nruab nrab ntawm qhov screen mus rau sab saum toj, hauv qab, sab laug thiab txoj kev qhia. Qhov loj dua tus nqi, qhov dav dav yog qhov tseeb, tab sis qhov khwv nyob rau hauv plaub cov lus qhia tsis yog qhov kev sim. Thaum nce thiab nqis, sab laug thiab txoj cai symmetry, qee cov tuam ntxhab yuav ntxiv lub qhov tseem ceeb ntawm ob tog, cim ua kab rov tav: 160 °; vertical: 160 °; tej zaum kuj yuav raug sau ua tus sab laug / sab xis: ± 80 °; up / down: ± 80 °. Lub kaum sab xis ntawm ib co qauv ntawm cov qauv yog txawm tias 40 ° ~ 50 °. Lub sijhawm teb cov lus teb ceev ceev: Lub sijhawm teeb liab hais txog lub sij hawm uas lub kaw lus teb rau tom qab tau txais cov cim ntawm cov keyboard lossis nas. Qhov teeb meem ntawm cov teeb liab tseem ceeb heev rau cov animation thiab nas zog. Qhov tshwm sim feem ntau tshwm sim ntawm LCD ua kua crystal, thiab CRT pa CRT lus tsis muaj qhov teeb meem no. Lub sij hawm teb kom ceev ceev, nws yooj yim dua yog siv txoj haujlwm. Ib qho ntawm txoj kev soj ntsuam yog txav nas sai (qhov ntawd yog, nas tsom qhia rau lub cev, thiab lub cev tsis tu ncua teb rau cov zaub). Hauv kev pom dav LCD yooj yim, tus cursor disappears thaum lub sij hawm ceev ceev. Kuv tsis pom nws kom txog rau thaum nas yog qhov chaw, thiab nws yuav tsis tshwm sim tom qab lub sijhawm luv luv. Hauv kev ceev ceev, qhov kev txav mus yuav pom meej nas zog. Tus VE500 tus xov tooj lub sij hawm tshaj tawm sai sai li 16 xuab moos (milliseconds), yog li tus cursor tsiv tsis muaj sij hawm sib txawv, cov txheej txheem lub zog yog qhov tseeb thiab yooj yim pom, thiab nws tsis ua haujlwm teeb meem.
LED teeb emitting diode nta.
Cov LEDs yuav tsum yog ci ntsa iab luminescent khoom, thiab qhov siab siab (UHB) hais txog LEDs nrog luminous siv mus txog los yog siab tshaj 100mcd, tseem hu ua candela (cd) LEDs. Txoj kev loj hlob ntawm high-brightness A1GaInP thiab InGaN LEDs yog nce zuj zus, thiab tau mus txog theem kev ua tau zoo raws li cov ntaub ntawv pom zoo GaA1As, GaAsP, thiab GaP tsis tuaj yeem ua tiav. Xyoo 1991, Toshiba Corporation ntawm Nyiv thiab HP Corporation ntawm Teb Chaws Asmeskas tau tsim InGaA1P 620nm txiv kab ntxwv ultra-high brightness LED. Nyob rau hauv 1992, InGaA1p590nm daj ultra-siab ci teeb ci LED tau muab tso rau hauv cov tswv yim siv. Nyob rau hauv tib lub xyoo, Toshiba tsim InGaA1P 573nm daj daj ntsuab ultra-high brightness nrog ib qho kev siv lub teeb ntawm 2cd. Nyob rau hauv 1994, Nyiv Nichia Corporation tsim InGaN 450nm xiav (ntsuab) xim ultra-high brightness LED. Ntawm qhov no, peb lub ntsiab xim ntawm xim liab, ntsuab, xiav, thiab xim daj thiab xim daj uas yuav tsum tau xim rau cov xim daj tuaj yeem mus txog candela-qib luminous siv, ua kom tiav ultra-siab ci thiab tag nrho cov xim, thiab ua rau sab nraum zoov xim ntawm cov luminous raj. Cov zaub ua ib qho kev muaj tiag. Qhov ci ci ntawm lub teeb tau siab tshaj 1000mcd, uas tuaj yeem ua tau raws li cov kev xav tau sab nraud txhua-huab cua thiab tag nrho xim. LED xim loj npo qhia tau lub ntuj thiab dej hiav txwv kom paub txog cov animation peb sab. Lub cim tshiab ntawm liab, ntsuab thiab xiav ultra-siab ci teeb ci tau ua tiav kev ua haujlwm tsis pom kev.
Pixels sab nraum zoov yog tam sim no muaj ntawm ntau tshaj ib leeg ntawm cov tub luam LEDs ntawm peb thawj xim xim liab / ntsuab / xiav, thiab cov khoom tiav cov khoom tiav muaj ob lub qauv ntawm ib lub raj pixel thiab ib lub pixel module. Qhov pixel loj me me yog 12-26 hli, thiab pixel muaj pes tsawg leeg: 2R / 3R / 4R rau monochrome, 1R2YG / 1R3YG / 1R4YG rau xim pseudo, thiab 2R1G1B rau cov xim tseeb.
Sab nraum zoov npo tsim cov txheej txheem (cov ntsiab lus tsis piav qhia)
△ cov qauv tsim cov qauv
△ ci ci thiab xim
△ Txwm tsim cov qauv kev ntseeg
△ Cov txheej txheem kev tsim muaj kev ruaj ntseg
△ Kev tswj tus qauv yooj yim thiab kev tsim kom tsim nyog
Screen installation txoj kev
△ Duab mounted: cov duab tso rau ntawm phab ntsa thiab tsau rau phab ntsa. Txoj kev no yog ib txoj kev coj thiab yog ib qho yooj yim rau kev siv.
△ zaum vertical: cov lus sawv ntawm lub platform. Txoj kev no yog qhov yooj yim rau kev siv, thiab hom installation yuav tsum tau najnpawb thaum muaj kev tso cai.
△ mosaic: cov duab yog nyob hauv ib phab ntsa. Qhov no yog qhov tsawg. Yog hais tias lub phab ntsa tsis txaus, nws yuav tsum raug xam tias yog muaj kev ruaj ntseg.
△ Sab ntsa: Qhov ntawd yog, ob sab ntawm cov zaub yog nyuab siab, thiab sab yog dai ntawm ob lub tsev los sis kab. Hom no feem ntau siv rau kev tso tawm kev tso tawm ntawm qhov chaw qhib, thiab ob kab yog ua raws li qhov yuav tsum tau ua raws li txoj cai ntawm kev tshuaj ntsuam.
Zaub tswj qhov system
Dacheng zaub tswj kev tswj muaj ob ntu: kev tshaaj / kis subsystem thiab kev txais / grey processing subsystem. Lub hauv ntej kawg yog lub VGA feature output interface ntawm lub computer lossis daim multimedia card nrog cov zis tawm cov zis. Tus kis tau tus mob yog tsib hom kab uas sib tw twv. Twb paub lawm, tom qab kawg yog lub tshuab hluav taws xob. Tus tshaaj / kis xaav subsystem pum tau 24 Cov khoom tseeb xim xim ntawm ib theem ntawm tsis pub tsawg dua 60 ntas ib paab, hab khu sau puab rua huv lub teeb txawb nyob huv lub cim xeeb ua lwm yaam tseem ceeb, nyob huv theem kws ua. Nyob rau hauv kev tswj, qhov nyhav conversion ntawm gray nplai tiav, thiab qhov txawv yog LVDS rau super tsib hom twisted pair channel. Tus super tsib twisted khub realizes qhov kev txuas ntawm kev tshaaj / kis subsystem thiab lub txais / grey processing subsystem kom tiav cov teeb liab kis. Nyob rau hauv cov ntaub ntawv ntawm tsis muaj relay, ntev tshaj plaws kis tau tus mob yuav ncav cuag 300 meters.
Grayscale kev piav qhia
Dacheng Txais / Cov Haujlwm Sib Txawv / Kev Txiav Txim Sib Thoob (Submission) tau txais 24 qhov tseeb cov xim tawm ntawm Super Class 5 sib tw, nrog rau qhov taw hnyav ntawm 20, 21, 22, 23, 24, 25, 26, 27, thiab yim rau txhua tus thawj xim. Qhov hnyav tivthaiv yog tswj los ntawm CPLD kom paub cov teebmeem 256-theem nplai gray. Nyob rau hauv kev yees duab uas tau txais kev pom zoo, qhov chaw cia khoom siv, kev ceev nrawm, thiab cov kev tswj saib kev tshuaj ntsuam, kev cuam tshuam kev cuam tshuam, thiab qhov tso tawm zaus ntawm 150 Hz yog ua kom muaj zog, muaj zog heev, thiab 24-ntsis tiag tiag yog guaranteed. Muaj tseeb cov nyhuv xim.
Cov xim uas tsim los ntawm ntau yam kev sib txuas ntawm 256 grey theem ntawm peb lub ntsiab xim ntawm liab, ntsuab thiab xiav: 256 × 256 × 256 = 16777216 xim (piv txwv li 16M xim)
Nonlinear gamma kho lus
Cov teebmeem video yog tsim los ua kom tau raws li cov teeb pom kev zoo thiab cov hluav taws xob ntawm cov khoom siv hauv TV thiab tuaj yeem ua si ntawm lub xov tooj los yog ntawm cov khoom. Yog hais tias lub teeb liab TV tsis kho, muaj xim loj heev tuaj yeem tshwm sim. Yog li, peb yuav tsum ua cov lus kho tsis thwj rau nonthearear ntawm lub ntsiab ntawm lub tswv yim video, thiab qhov chaw kho chromaticity yuav raug tsim kho. Sib cuag rau LED loj vijtsam, qhov kev ci ci ntsa iab yog ncaj qha mus rau ntawm tus nqi grey. Yog tias nws tsis kho, nws pom tseeb tsis tuaj yeem ua raws li cov kev cai ntawm kev luam xim. Qhov kev txig ntawm cov duab yog: cov qib grey qib jumps zoo heev, thiab cov grey siab tshaj yog tsis meej. . Raws li peb txhua tus paub, tib neeg lub qhov muag pom kev ntawm qhov kev siv lub teeb yog non-linear. Thaum lub teeb tsis muaj zog, lub teeb pom kev yog ob npaug, thiab tib neeg lub qhov muag zoo tshaj ntau tshaj ob npaug. Thaum lub teeb muaj zog, lub teeb pom kev yog ob npaug, thiab tib neeg lub qhov muag xav tias lub zog. Nws yog tsawg dua ob npaug, yog li ntawd nws yog ib qhov tsim nyog yuav ua rau grey scale nonlinear transformation, yog li lub sij hawm luv yog me me thaum grey nplai tsawg, thiab lub sij hawm luv yog siab thaum ntsuas grey siab. Yog li ntawd, thiaj li ua kom tiav qhov kev kho tiav ntawm LED cov xim loj loj, kev hloov kho los ntawm gamma yuav tsum tau ua. Tom qab kho, nws cov yam ntxwv zoo ib yam li cov CRT. Peb tuaj yeem pom tseeb tias cov duab grayscale-corrected yuav tshwm sim kom pom tseeb kev ntxhib los mos, muaj zog nrawm, muag ci, thiab txoj kev hloov ntawm lub teeb thiab tsaus.
Kev pov thawj ntawm kev tshuav dawb, xim txawv thiab xim xim ntawm cov xim muaj tseeb tiag
Dawb tshuav txhais tau hais tias thaum txhua tus xim loj tuaj txog theem siab tshaj plaws, qhov xim dawb uas pom tau zoo ntawm sab nraud ntawm 6500K, uas txhais tau tias qhov ci teeb ntawm LED teeb-emitting tube, tshwj xeeb tshaj yog lub teeb liab-emitting tube , hloov nrog kub. ib qho phenomenon. Lub voj voos ntawm cov xim muaj qhov qhia tias qhov kev ntsuas tshav dawb ntawm lub ntsuas kub yuav poob poob siab vim kev hloov hauv kev kub hauj lwm, los yog tag nrho cov zaub yuav ua si tom qab lub sij hawm ntawm vim tsis sib npaug ntawm qhov ntsuas hauv qhov screen. "Lub ntsej muag paj" tshwm sim. Lub tuam txhab muaj kev daws teeb meem rau cov teeb meem tshwm sim los ntawm cov xim sib txawv ntawm qhov tseeb xim zaub, uas tuaj yeem ua kom cov xim nplua nuj thiab zoo ib yam ntawm cov xim tseeb.
Ntsuas saib xyuas thiab tiv thaiv system
Lub tswv yim soj ntsuam xyuas yog tsim los ntawm ntau yam kev ntsuas, xyuas systems thiab tswj computers. Nws yog siv los saib xyuas qhov chaw ua haujlwm tsis zoo ntawm lub npo saib, tswj qhov kev tiv thaiv zoo rau hauv lub sijhawm, xyuas kom ua haujlwm ntawm lub vijtsev duab, thiab kev ua haujlwm tsis hloov. Kev tiv thaiv muaj xws li: qhov system hluav taws xob, qhov system tsis muaj dej, thiab lub zog tiv thaiv hluav taws xob rau kev faib khoom.
tswj software
Qhov kev lag luam ntawm lub cev yuav tsum muaj kev txhawb nqa ntawm cov software uas muaj feem xyuam. Peb software designers tau tsim ib qho yooj yim thiab yooj yim-rau-siv software configuration system los ntawm kev ceev faj thiab kev ua ke. Nyob rau hauv lub software system, raws li qhov sib txawv ntawm cov software, peb faib lawv mus rau ob pawg: ib qho yog qhov software tswj software, uas yog ua tiav cov lus qhib thiab kev tswj cov ntawv nyeem, cov duab animation thiab video, uas yog cov hauj lwm yooj yim ntawm cov lus. Software; lwm hom ntawm cov txheej txheem editing software yog siv rau kev tawm tswv yim ntau thiab kev nraaj, uas tuaj yeem ua cov ntsiab lus ntawm cov zaub tas li hloov tshiab thiab hloov.
LCD muab faib ua STN TFT TFD, thiab lwm yam.
1. STN yog dabtsi?
STN (SuperTwistedNematic) yog ib qho hluav taws xob uas hloov cov txheej txheem ntawm cov tshuaj siv lead ua kua (liquid crystal molecules) uas yog keeb kwm ntau tshaj 180 degrees los hloov qhov kev hloov ua teb chaws. Tus qauv fais fab siv hloov hluav taws xob los ntawm kev sojntsuam. Thaum cov txheej txheem hloov ntawm qhov hluav taws xob ntawm qhov hluav taws xob, qhov rov qab los ntawm txhua tus taw tes yog rov ua dua. Nws yog qeeb qeeb thiab yog li ua tom qab tiav. Qhov ob qhov loj tshaj ntawm STN thiab TFT yog tias TFT qhov kev ua tau zoo dua STN, tiam sis STN txuag zog piv rau TFT.
2. TFT yog dab tsi?
TFT (ThinFilmTransistor) yog hais txog tus yeeb yaj kiab nyias, tus txhais tau tias txhua cov kua siv lead ua kua pixel yog tsav los ntawm ib zaj duab xis transistor hauv qab lub pixel, yog li ntawd high-speed, high-brightness, high-contrast display screen yuav ua tau tiav. Yog ib lub LCD xim tso saib, uas yog ze rau ntawm CRT cov duab, yog cov khoom tso rau hauv laptops thiab desktops. Txhua pixel ntawm qhov TFT yog tswj los ntawm ib qho TFT rau nws tus kheej, uas yog ib qho pixel. Yog li ntawd, tsis tas tsuas yog qhov ua tau zoo heev, tab sis qhov sib txawv thiab ci ntsa iab kuj zoo heev, thiab qhov kev daws teebmeem tseem nyob theem siab.
3. TFD yog dab tsi?
Cov xov tooj ntawm cov xov tooj ntawm tes tseem mus. Nyob rau hauv cov ntaub ntawv no, tib neeg muaj kev cai siab dua rau kev ua haujlwm LCD. Cov nram qab no yog cov yam ntxwv tseem ceeb ntawm cov xov tooj tom ntej ntawm lub xov tooj txawb LCD: (1) high quality image; 2) tsawg zog siv; (3) Muaj peev xwm ua tus txheej txheem tsiv; 4) Cov qauv cog lus; Epson Co., Ltd. muaj kev lag luam ua ke nrog kev ua haujlwm ntawm DD-TFD (digital diode nyias diode) thiab tau dhau los ua cov qauv digital koob yees duab. ib tug. Ib qho tseem ceeb tshaj plaws yog tias tsis muaj zog txaus (cov yam ntxwv ntawm D-TFD) thiab cov duab siab / qhov siab siab tshaj (cov yam ntxwv ntawm cov dot matrix LCD) ua tau raws li cov koob yees duab digital. Los ntawm thov kev yees tshiab nrog cov duab siab zoo, tsis muaj hwj chim ntau dua thiab cov qauv kev tsim dua tshiab rau D-TFD, peb tau ua tiav cov lus plaub saum toj no rau cov cim ntxiv ntawm cov xov tooj ntawm tes nyob rau theem siab. Hom LCD no hu ua "MD-TFD".
4. Qhov txawv ntawm TFT, STN thiab TFD LCD yog dab tsi?
Cov zaub screen siv los ntawm lub xov tooj txawb muaj peb hom: STN hom, TFD hom, thiab TFT hom. Ntawm lawv, qhov zoo tshaj plaws cov duab zoo yog TFT, thiab feem ntau ntawm cov kev siv siv hauv cov computers computers yog hom hom no. Txawm li cas los, txawm hais tias TFT zoo nkauj rau hauv qhov tsos thiab noj ntau ntau zog, nws muaj qhov tsis zoo tias lub roj teeb tsis ruaj khov rau lub xov tooj txawb. Txawm hais tias txoj kev STN yog qhov phem tshaj plaws ntawm cov duab zoo, nws muaj qhov ua tau zoo ntawm qis zog thiab tsawg tus nqi. Lub TFD yog qhov chaw nyob hauv nruab nrab ntawm TFT thiab STN. Txawm hais tias cov duab zoo zoo nkauj me ntsis mus rau TFT, nws consumes zog dua TFT.
