1 Kev Taw Qhia
Nrog kev tsim kho thev naus laus zis thiab kev txhim kho sai ntawm kev sib txuas lus thev naus laus zis, cov neeg siv tsheb xav tau ntau qhov kev xav tau thiab cov khoom siv niaj hnub no kom txaus siab rau kev xa xov sai, navigation thiab kev lom zem. Lub tsheb-mounted kua siv lead ua zaub yog ib qho kev daws teeb meem tseem ceeb tshaj plaws. Nrog nws cov yam ntxwv tshwj xeeb ntawm lightness, tsawg zog noj, thiab colorization, nws yog siv nyob rau hauv lub tsheb los hloov lub qub-fashioned mechanical qhia thiab paub txog cov zaub functions.
Cov kua siv lead ua kua muaj ntau yam kev siv hauv tsheb, feem ntau yog siv rau hauv cov twj paj nruag, kev taw qhia, kev lom zem multimedia, cua txias thiab lwm yam khoom siv, qhia cov neeg siv lub tsheb ceev, cav ceev, roj noj, mais, maps, DVD screens. , xov tooj cua channel, thiab CD lem. , Kub hauv lub tsheb, thiab lwm yam. Muaj qhov sib txawv loj ntawm lub tsheb LCD cov ntxaij vab tshaus thiab cov ntxaij vab tshaus hauv tsev zoo tib yam ntawm cov nqi thiab cov kev xav tau. Tsab ntawv xov xwm no nthuav tawm, tshuaj xyuas thiab nthuav tawm cov kev daws teeb meem uas muaj feem cuam tshuam ntawm STN LCD cov ntxaij vab tshaus uas nquag siv hauv tsheb.
2. Kev faib ua feem ntawm LCD
LCD tuaj yeem muab faib ua passive matrix LCD thiab active matrix LCD raws li kev tswj sib txawv. Passive matrix LCDs tau txwv ntau heev nyob rau hauv cov nqe lus ntawm brightness thiab saib lub kaum sab xis, thiab lawv cov lus teb ceev kuj qeeb. Vim muaj teeb meem ntawm daim duab zoo, cov khoom siv no tsis zoo rau kev tsim cov duab duab, tab sis vim yog cov nqi qis, lub tsheb-mounted kua siv lead ua kua feem ntau siv passive matrix LCD [4].
Passive matrix LCD tuaj yeem muab faib ua TN-LCD (Twisted Nematic-LCD, twisted nematic LCD), STN-LCD (Super TN-LCD, super twisted nematic LCD) thiab DSTN-LCD (ob txheej STN-LCD, ob txheej Super Twisted Nematic LCD) [1].
Cov kua siv lead ua kua yog cov zaub tsis muaj zog. Nws tsis tuaj yeem tawm lub teeb ntawm nws tus kheej thiab tsuas yog siv lub teeb ntawm ib puag ncig ib puag ncig. Lub ntsiab backlight qhov chaw yog LED, EL, thiab CCFL. Nws cov qauv dav dav tau pom hauv daim duab 1 [5]. Nws tuaj yeem pom tau tias lub hauv paus ntsiab lus ua haujlwm tseem ceeb ntawm cov kua siv lead ua kua yog hloov cov kev npaj lossis twist ntawm cov kua siv lead ua kua molecules los ntawm cov electrodes kom xa lub teeb kom ua tiav cov txiaj ntsig pom.
STN-LCD zaub xim muaj kev cuam tshuam zoo heev los ntawm nws lub xov tooj ntawm tes, thiab kev hloov me ntsis ntawm lub xov tooj ntawm tes yuav ua rau pom qhov sib txawv ntau dua. Kev cuam tshuam los ntawm qhov sib txawv ntawm qhov tuab ntawm cov khoom siv iav thiab qhov tsis ruaj khov ntawm cov txheej txheem ua kua siv lead ua flattening thaum lub sijhawm tsim khoom, cov pob ci ci yuav raug tsim tawm ntawm cov npoo. Nws yog ib qho nyuaj kom tsis txhob muaj teeb pom kev ntawm ntug ntawm TN-LCD. Txawm li cas los xij, nws muaj peev xwm tshem tawm cov kev xav tsis zoo los ntawm kev ua kom lub ntsej muag npog rau ntawm ntug ntawm LCD thaum tsim lub rooj sib txoos.
Cov txheej txheem luam ntawv ntawm cov txheej txheem sab hauv ntawm STN-LCD tsis ruaj khov, thiab qhov sib txawv ntawm txoj kab uas hla ntawm cov hlaws hlaws yuav ua rau cov qib sib txawv ntawm cov xim tsis sib xws. Ntawm lub teeb dawb-lub teeb ob lub npo LCD, muaj ntau qhov chaw dawb ntawm cov keeb kwm yav dhau dub, uas tshwj xeeb tshaj yog pom tseeb thaum pom nyob rau hauv kev coj rov qab mus rau lub kaum sab xis saib. Tam sim no, nws tau tswj hwm los ntawm kev teeb tsa cov qauv txwv rau kev tshuaj ntsuam zoo li qub.
Cov khoom siv hluav taws xob sib txawv hauv lub tsheb xws li ntsuas ntsuas, xov tooj cua, thiab cov tshuab cua txias yuav ua rau muaj qhov sib txawv ntawm cov teeb pom kev zoo vim lawv cov nqi sib txawv, qhov sib txawv ntawm lub vijtsam, thiab cov cuab yeej siv sib txawv. Piv txwv li, qhov sib piv ntawm lub vijtsam zaub ntawm lub tshuab cua txias siv EBTN (Ntxiv Dub Hauv Qab) thev naus laus zis ntau dua li cov neeg txais khoom siv STN LCD zoo tib yam. Txawm li cas los xij, yog tias lub LCD zoo dua xws li TFT siv hauv xov tooj cua thiab cov neeg uas ua ntawv, tus nqi ntawm lub xov tooj cua thiab cov neeg uas ua ntawv yuav raug muab faib ua ob npaug.
Tam sim no, tsis muaj kev daws teeb meem tshwj xeeb rau cov qauv batch, thiab peb tsuas tuaj yeem sim kho cov haujlwm tseem ceeb thiab kev sib tw ua haujlwm kom muaj qhov pom kev zoo, tab sis nws tuaj yeem siv los ua qhov tseem ceeb hauv kev tsim cov qauv tshiab. .
3. Hom LCD tsis xws luag thiab cov lus qhia rectification
Tam sim no, muaj plaub hom kev tsis xws luag raws li qhia hauv daim duab hauv qab no, thiab cov laj thawj ntawm qhov tsis xws luag yog tsim los ntawm peb yam hauv qab no: kev tsis zoo los ntawm kev xav tsis zoo nyob rau hauv cov qauv tsim, kev puas tsuaj los ntawm kev tsis sib haum xeeb hauv kev tsim khoom, thiab tsis xws luag los ntawm lwm yam. Raws li ntau hom, saib cov piv txwv hauv qab no tsom xam raws.
3.1 Zaub flicker tshwm sim los ntawm qhov kub thiab txias parameter teeb meem teeb meem
Cov lus piav qhia txog teeb meem: Lub xov tooj cua screen flickers ntawm qhov kub thiab txias.
Yog vim li cas tsom xam: Yuav kom ntseeg tau cov zaub nyhuv nyob rau hauv ib tug loj dua qhov kub thiab txias, lub LCD tsav nti ntawm lub xov tooj cua muaj ob hom kev ua hauj lwm, lub ntsiab lus tseem ceeb ntawm kev hloov yog txhais ntawm 10 degree; thaum lub xov tooj cua kuaj pom qhov kub thiab txias nyob rau hauv nws hom Thaum hloov qhov taw tes tseem ceeb ntab nce thiab nqis, hom kev ua haujlwm yuav hloov mus tas li; lub xov tooj cua thiab player program software tsis ua haujlwm zoo ntawm kev hloov pauv qhov tseem ceeb, thiab cov zaub yuav flicker rau lub sijhawm no.
Kev ntsuas kev txhim kho: hloov kho lub software ntawm lub xov tooj cua thiab receiver, ntxiv hysteresis tswj ntawm qhov tseem ceeb ntawm qhov kev hloov ntawm qhov kub thiab txias ntawm cov zaub ua haujlwm, thiab ua haujlwm zoo ntawm lub zog hluav taws xob ntawm cov zaub thaum hloov kom tsis txhob flickering ntawm cov zaub. Daim duab 3-1a yog qhov kub thiab txias qhov nkhaus ua ntej hloov kho, thiab 3-1b yog qhov kub thiab txias tom qab hloov kho.
3.2 Random ci qhov muag pom ntawm qhov kub thiab txias vim qhov tsis sib haum xeeb ntawm cov khoom siv tsav nti thiab cov software programming
Cov lus piav qhia txog cov teeb meem: LCD ua rau lub teeb ci ntsa iab hauv qhov kub thiab txias.
Yog vim li cas tsom xam: LCD tsav nti specifications muaj tej yam yuav tsum tau rau nws lub sij hawm thiab voltage, cov ntaub ntawv tuav lub sij hawm yog 450ns; cov ntaub ntawv tuav lub sij hawm nyob rau hauv lub software tsim tsuas yog ncav cuag 60ns, thiaj li yuav ua tau raws li qhov yuav tsum tau 450ns, qhov tam sim no tsim siv tsis kam Lub capacitance (kuj, capacitance) network yog ncua; nyob rau hauv qhov kub thiab txias ib puag ncig, tus nqi kuj yuav txo qis nrog qhov nce ntawm qhov kub thiab txias, uas ua rau cov ntaub ntawv tuav lub sij hawm sib lawv liag tsis raug, ua rau random ci me ntsis.
Kev ntsuas kev txhim kho: Qhov teeb meem ntawm qhov tsis pom kev ci ntsa iab raug tshem tawm tag nrho los ntawm kev hloov lub LCD tsav nti, tab sis kev ntsuam xyuas txaus yuav tsum tau ua.
Qhov tsis xws luag tshwm sim los ntawm qhov muaj cov khoom txawv teb chaws hauv LCD lossis kev sib cuag tsis zoo / luv luv los ntawm cov txheej txheem tsim khoom sib txawv nyob ntawm qhov chaw uas nws tau poob los yog tsis zoo sib txuas, thiab qhov tshwm sim tsis ua haujlwm kuj tseem yuav hloov raws li.
3.3 Kev puas tsuaj los ntawm cov khoom txawv teb chaws poob rau hauv LCD
Cov tswv yim tswj hwm: Nws yog ib qho tsim nyog yuav tsum tau ua kom ntxaws ntxaws ntawm cov khoom txawv teb chaws muaj pes tsawg leeg, nrhiav nws qhov tseeb tom qab paub meej tias nws muaj pes tsawg leeg, thiab tom qab ntawd kho cov txheej txheem los tiv thaiv tib yam txawv teb chaws los ntawm kev poob rau hauv nws dua.
3.4 Cov teeb meem tshwm sim los ntawm cov txheej txheem tsim khoom LCD tsis ruaj khov
Kev daws: Yog tias muaj lwm yam tshuaj nyob rau hauv txoj haujlwm puas, kev tshuaj xyuas muaj pes tsawg leeg yuav tsum tau ua. Txhim khu kev tswj kev huv ntawm cov kab ntau lawm kom tiv thaiv cov neeg ua haujlwm tawm hws los ntawm cov dej ntws mus rau cov khoom ib nrab tiav, nce cov khoom siv tswj kom txo tau txoj hauv kev ntawm tib neeg txhais tes ncaj qha kov cov khoom ib nrab, thiab siv cov cuab yeej los tiv thaiv kev ua haujlwm tsis raug.
Cov teeb meem saum toj no tuaj yeem tswj tau ib ntus los ntawm kev txhim kho kev tshuaj ntsuam xyuas, xws li kev tshuaj xyuas hluav taws xob high-voltage ntawm cov khoom tiav tiav, thiab kev tshuaj xyuas cov khoom tiav hauv qhov chaw kub thiab cov av noo. Nws tuaj yeem txhim kho qhov kev tshawb pom ntawm cov khoom tsis zoo thaum ntxov thiab txo qhov kev tawm ntawm cov khoom puas.
3.5 Kev puas tsuaj los ntawm kev puas tsuaj rau LCD tshwm sim los ntawm kev quab yuam sab nraud thaum sib dhos
Cov tswv yim tswj hwm: Thaum sib sau cov khoom siv hluav taws xob nrog LCD hauv lub rhiav, nws yog ib qho tsim nyog kom tsis txhob muaj kev sib cuag ncaj qha rau ntawm qhov chaw ntawm LCD kom ntau li ntau tau, ua rau lub siab ua rau cov zaub tsis zoo lossis cov iav puas.
3.6 Cov teeb meem tshwm sim los ntawm peripheral circuit tsis ua hauj lwm
Kev daws teeb meem: Cov khoom siv sib dhos yuav tsum tau ua kom muaj kev tswj hwm zoo hauv sab hauv, xws li kev huv ntawm cov kab ntau lawm, kev lees paub ntawm vuam nyhuv, thiab kev tshuaj xyuas cov khoom tuaj. Thiab los ntawm kev tsim nyog los ua ke Hoobkas tshuaj xyuas kom pom cov khoom zais thaum ntxov kom tsis txhob ntws mus rau hauv tes ntawm cov neeg siv khoom. Cov txheej txheem feem ntau yog: kev ua haujlwm kub, simulated kev thauj mus los ib puag ncig kev co, thiab lwm yam.
4. Cov lus xaus
Cov kua siv lead ua kua siv thev naus laus zis tau siv ntau dua hauv kev siv tsheb, thiab nws txoj kev txhim kho kev coj ua kuj tseem muaj qhov qub monochrome, tsis tshua muaj kev daws teeb meem, thiab pom lub kaum sab xis ntawm lub LCD qub maj mam hloov mus rau xim, siab txhais, thiab lub kaum sab xis pom dav. Nws yog qhov pom tau tias yav tom ntej, cov nyhuv ntawm lub tsheb LCD yuav zoo ib yam li cov khoos phis tawj hauv tsev thiab TV, thiab cov ntsiab lus pom yuav dhau los ua ntau dua, tsim kom muaj kev tsav tsheb zoo dua rau cov neeg siv. Los ntawm qhov zoo ntawm qhov pom, peb kuj yuav tsum ua kom nrawm nrog lub sijhawm, tsis tu ncua nkag siab txog kev lag luam muaj zog, thiab nqus cov kev paub tshiab los xyuas kom meej cov khoom ruaj khov. Muaj txoj kev mus ntev.
cov ntaub ntawv:
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