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Cov haujlwm ua haujlwm thiab cov qauv ntawm kev tshuaj ntsuam thiab nws cov kev faib tawm, ntau pawg thiab kev tsis

Cov haujlwm ua haujlwm thiab cov qauv ntawm kev tshuaj ntsuam thiab nws cov kev faib tawm, ntau pawg thiab kev tsis

Aug 11, 2017

Cov saib (cov duab) yog feem ntau hu ua cov saib xyuas. Cov duab yog ib qho I / O ntaus ntawv uas yog khoom siv mus rau lub koos phis, uas yog, tus tawm tswv yim tawm. Nws yog ib lub tshuab ntaus ntawv uas hloov cov ntaub ntawv hauv hluav taws xob mus rau qhov kev tshuaj ntsuam los ntawm ib qho kev sib kis thiab tom qab ntawd qhia rau tib neeg qhov muag. Raws li kev tsim cov khoom sib txawv, muab faib ua: cathode ray tshav zaub (CRT), plasma zaub, PDP, LCD, LCD, thiab ntxiv rau.

Cov dej siv lead ua kua, kua siv lead ua kua yog ib yam khoom tshwj xeeb heev. Nws ntws zoo li cov kua thiab muaj qee cov khoom siv kho qhov muag ntawm cov nplais. Cov kua ua kua dej tau pom nyob rau xyoo 1888 los ntawm Austria scholar Reinitzer plant, yog kev sib tw ntawm cov khoom ua kua thiab cov kua, cov organic sib xyaw nrog cov kev tu ncua ntawm kev hloov, ib qho kev txiav txim siab ntawm cov kua ua kua dej ua kua, thiab cov kev hloov hauv lwm cov kev mob, kub, electromagnetic rhiab heev kaum. Nyob rau hauv lub zog ntawm cov hluav taws xob, qhov kev hloov ntawm kua siv lead ua molecules yuav hloov, yog li cuam tshuam nws cov khoom kho qhov muag. Qhov tshwm sim no yog hu ua electro-optic effect.

Feem ntau nyob rau hauv ob lub iav substrate muab tso rau hauv cov xim sib dhos, xim siv los ua kom sib haum raws li cov nplhaib, iav substrate nrog cov nplaim hauv cov kua tshuaj pleev xim molecules ntawm 900, xws li nyob rau hauv tib lub dav hlau li cov qhov chaw nkaum ua ib tus zoo, thiab molecular nematic los ntawm ib theem mus rau lwm txoj kev hloov yuav maj mam tig mus txog 900, uas yog ob txheej leb tawm txheej txheem ntawm 900 feem pua. Hom nematic kua siv lead ua (NEM atic ntau hom kua siv ua kua dej), molecular shape yog rhawv pas duab, ntev thiab qhov dav ntawm 1-10nm (1nm = 10Am), nyob rau hauv txawv teb tam sim no, cov kua siv lead ua kua molecules ua txoj cai 90 degree kev sib hloov, tsim qhov sib txawv ntawm qhov sib txawv, xws li lub hwj huam rau thiab tawm hauv kev ntxoov ntxoo hluav taws xob, kev tswj txoj cai ntawm txhua tus pixel yuav tshwm sim tawm ib yam duab. LCD cov duab, uas yog, kua siv lead ua kua, cov txiaj ntsig ntawm nyias lub cev, me me hneev taw, me me tawg, muab cov duab zoo. Tab sis lub LCD screen tsis tas tiv thaiv lub qhov muag. Nws nyob ntawm seb tib neeg siv lub computer. LED zaub (LED vaj huam sib luag): LED yog lub teeb, emitting, diode, lub teeb-emitting diode hauv lus Askiv abbreviation, hu ua LED. Kev siv hluav taws xob muaj feem xyuam nrog ib qho screen rau kev tso duab, graphics, duab, animation, cov nqi, video, video teeb liab thiab lwm cov ntaub ntawv los ntawm kev tswj cov kev coj ntawm ib qho kev coj ua semiconductor.

LED cov kev tsim kho tshiab yog tus neeg tsav tsheb tshaj plaws ntawm kev ua lag luam thiab cov ntawv thov. Pib, LED yog li micro teeb lub teeb, siv hauv computer, audio thiab video recorders thiab lwm yam cuab yeej siv high-end, nrog rau kev loj hlob ntawm loj teev hauv kev siv hluav taws xob thiab tshuab computer, LED zaub nce qis thiab maj maj mus rau Tshuag Tshuag Tshuag tshuab, digital koob yees duab, PDA, xov tooj txawb xov tooj. Video amplifier Circuit Court: tau muab faib ua ntej kev hloov ua ntej thiab cov zis video ob sab. Saib ua ntej tso tawm tau txais los ntawm cov teeb liab interface xa tuaj. Qhov R, G thiab B peb qhov kev yees duab thawj xim video tau ua kom nrov tau lub sijhawm tso tawm video. Nws yog qhov hluav taws xob amplifier tso tawm rau theem: theem, lub teeb liab video raug xa mus rau qhov kev tso tawm ua ntej tso tawm kom muaj zog txaus tsav lub cathode raj, modulated cathode electron emission

Tom qab cov hluav taws xob hauv electron yog bombarded nrog lub fauxphor screen, qhov kev ua haujlwm ntawm qhov hluav taws xob lub teeb hloov tiav lawm, thiab daim duab tau muab tso tawm nrog lub luam. Lub hauv paus ntsiab lus ntawm LCD tshuab muab tso ntawm lub teeb ua kua dej ua kua monochrome LCD mus rau ob kab nrog qhov qhib. Lub grooves ntawm ob lub dav hlau yog perpendicular rau txhua tus (tshuam 90 degrees). Qhov ntawd yog, yog tias cov lwg me me nyob rau sab qaum teb thiab sab qab teb, cov txheej txheem ntawm lwm lub dav hlau tau npaj rau hauv cov kev taw qhia sab hnub tuaj-sab hnub poob, thiab cov qauv ntawm ob lub dav hlau raug yuam mus rau hauv lub xeev ntawm 90 degree torsion. Raws li lub teeb tsiv raws li cov kev taw qhia ntawm cov molecules, lub teeb kis tau los ntawm cov kua siv lead ua kua thiab muab 90 degrees. Tab sis thaum muaj qhov voltage ntxiv rau cov kua siv lead ua kua, cov molecules yog teem kom vertically thiaj li hais tias lub teeb yuav mus ncaj tawm tsis muaj twisting. Tus LCD yog nyob ntawm cov ntxaij lim dej (polices) thiab lub teeb nws tus kheej. Lub teeb ci mus rau hauv txhua qhov kev qhia. Polarization lim tau ua tau ib kab ntawm txoj kab sib dhos. Cov kab no ua ib lub ntsej muag uas thaiv tag nrho cov rays tsis sib luag rau cov kab no. Tus kabmob (polarized filter line) tsuas yog thawj zaug rau thawj tug, yog li nws tuaj yeem cuam tshuam lub teeb ntsuab. Tsuas yog cov kab ntawm cov ntxaij lim dej ob qho tib si nkaus xwb, los yog lub teeb nws tus kheej tau muab piv rau cov ntxaij lim dej thib ob, thiab lub teeb tau mus rau. Lub teeb nkag mus rau lub teeb LCD ua los ntawm cov ntxim nyiam ntxig li ob qho tib si, yog li nyob rau hauv ib txwm muaj tshwm sim, tag nrho cov kev nkag mus rau hauv lub teeb yuav tsum raug thaiv. Txawm li cas los xij, txij li ob qho ntxaij lim dej uas muaj cov kua nplaum ua kua, cov teeb pom kev yog 90 degrees tom qab lub teeb dhau ntawm thawj lim, thiab thaum kawg tshem tawm ntawm qhov lim thib ob. Ntawm qhov tod tes, yog tias qhov voltage ntxiv rau cov kua siv lead ua kua, cov molecules yuav rearrange thiab ua kom tiav mus kom tas lub teeb tsis rov qab, yog li ntawd cov ntxaij lim dej thib ob thaiv. Hauv ntej, lub hwj chim cuam tshuam los ntawm lub teeb, thiab tsis muaj hluav taws xob, lub teeb tau tshwm sim mus rau hauv lub teeb kom thaiv daim duab. Txawm li cas los xij, kev kho ntawm cov kua nplaum nyob hauv LCD yuav raug hloov kom lub teeb tau tawm ntawm lub hwj chim thiab cuam tshuam tsis muaj hluav taws xob. Tab sis vim hais tias lub computer screen yog yuav luag txhua zaus lit, nws tsuas yog "hwj chim li" uas blocks lub teeb "

Lub tswv yim muaj peev xwm ua tiav lub zog tshaj tawm dag zog. Los ntawm qhov pom ntawm cov qauv siv lead ua kua, txawm nws yog lub computer lossis desktop, lub LCD zaub yog tsim los ntawm ntau qhov chaw ntawm cov txheej txheem fawm kib. LCD muaj ob iav daim hlau, kwv yees li 1 hli tuab, nrom nrug ntawm 5 m LC uas muaj cov khoom siv ua kua ua kua. Vim tias cov khoom siv lead ua kua tsis yog lub teeb, ces qhov screen rau ob tog nrog lub teeb ua lub teeb ci, thiab lub teeb pom kev hauv cov kua dej ua kua (lossis lub tsho zoo) thiab cov yeeb yaj kiab, tshuaj muaj peev xwm tawm tau lub teeb, nws lub ntsiab tseem ceeb yog muab rau cov teeb tom qab teeb. Lub teeb tawm ntawm lub teeb ci ntsa iab nkag mus rau hauv cov kua qaub taub hau uas muaj plaub txhiab ntawm cov tshuaj siv lead ua tom qab dhau los ntawm thawj txheej ntawm polarization filtering txheej. Cov tshuaj siv lead ua nyob rau hauv cov kua siv lead ua kua yog nyob hauv tus nplua cell qauv, los yog ntau lub hlwb ua tus pixel ntawm qhov screen. Ntawm lub iav phaj thiab cov khoom siv ua kua ua kua yog lub pob tshab electrode, cov electrode tau faib ua cov kab thiab cov kab, kab thiab kem ntawm qhov cross point, thiab kev hloov ntawm cov kua qaub cab siv qhov muag los ntawm hloov qhov voltage, cov kua siv lead ua kua rau ib lub teeb me me. Lub periphery ntawm cov khoom siv lead ua kua yog ib qho kev tswj hluav taws xob ib feem thiab ib qho kev tsav hluav taws xob. Thaum cov electrode hauv LCD ua hluav taws xob, lub kua siv lead ua kua molecule distortion, li no dhau lub teeb uas dhau ntawm nws hauv kev tsis tu ncua, thiab tom qab ntawd lim nws ntawm qhov kev tshuaj ntsuam los ntawm cov khoom ntawm cov txheej thib ob ntawm cov lim.