LCD yog dab tsi? Hauv luv thiab meej, qhov no yog kua siv lead ua kua. Cov khoom siv yooj yim uas muaj cov khoom siv no tuaj yeem ua haujlwm nrog cov duab dub thiab dawb, lossis nrog 2-5 xim. Tam sim no, cov ntxaij vab tshaus tau piav qhia yog siv los tso saib cov duab nraaj lossis cov ntawv nyeem. Lawv tau nruab rau hauv computers, laptops, TVs, xov tooj, koob yees duab, ntsiav tshuaj. Feem ntau cov khoom siv hluav taws xob tam sim no ua haujlwm nrog lub vijtsam nkaus xwb. Ib qho ntawm ntau hom kev siv thev naus laus zis no yog cov kua siv lead ua kua matrix.
History
Cov kua dej ua kua tau pom thawj zaug hauv xyoo 1888. Qhov no tau ua los ntawm Austrian Reinitzer. Nyob rau hauv 1927, Lavxias teb sab physicist Frederiks nrhiav pom tus hla, uas yog hu ua tom qab nws. Tam sim no, nws tau siv dav hauv kev tsim cov kua siv lead ua kua. Xyoo 1970, RCA tau tshaj tawm thawj lub vijtsam ntawm hom no. Nws tam sim ntawd pib siv rau hauv watches, lub laij lej thiab lwm yam khoom siv.
Me ntsis tom qab, cov duab matrix tau tsim ua haujlwm nrog cov duab dub thiab dawb. XimLCD npo tau tshwm sim hauv xyoo 1987. Nws tus creator yog Sharp. Lub diagonal ntawm cov cuab yeej no yog 3 ntiv tes. Cov lus teb ntawm hom LCD npo no tau zoo.
Device
Thaum saib cov ntxaij vab tshaus LCD, nws yuav tsum tau hais txog kev tsim cov thev naus laus zis.
Cov cuab yeej no muaj lub LCD matrix, lub teeb ci uas ncaj qha muab lub teeb rov qab rau nws tus kheej. Muaj cov ntaub ntawv yas uas ua los ntawm cov hlau thav duab. Nws yog tsim nyog los muab rigidity. Kuj tseem siv tau yog cov hlua tiv tauj, uas yog cov xov hlau.
LCD pixels muaj ob hom pob tshab electrodes. Ib txheej ntawm molecules muab tso rau nruab nrab ntawm lawv, thiab tseem muaj ob lub lim dej polarizing. Lawv cov dav hlau yog perpendicular. Ib tug nuance yuav tsum tau muab sau tseg. Nws nyob hauv qhov tseeb tias yog tias tsis muaj cov kua dej ntawm cov lim dej saum toj no, ces lub teeb dhau los ntawm ib qho ntawm lawv yuav raug thaiv tam sim los ntawm qhov thib ob.
Qhov saum npoo ntawm cov electrodes, uas yog nyob rau hauv kev sib cuag nrog kua muaju, yog them nrog ib tug tshwj xeeb sheath. Vim li no, cov molecules txav mus rau tib txoj kev. Raws li tau hais los saum no, lawv feem ntau yog perpendicular. Thaum tsis muaj qhov nro, tag nrho cov molecules muaj cov qauv helical. Vim li no, lub teeb yog refracted thiab dhau los ntawm lub lim thib ob yam tsis tau poob. Tam sim no leej twg yuav tsum nkag siab tias qhov no yog LCD raws li physics.
txiaj ntsig
Thaum piv nrog cov khoom siv hluav taws xob hluav taws xob, cescov kua siv lead ua kua yeej ntawm no. Nws yog qhov me me thiab qhov hnyav. Cov khoom siv LCD tsis flicker, lawv tsis muaj teeb meem nrog kev tsom, nrog rau kev sib txuam ntawm cov duab hluav taws xob, tsis muaj kev cuam tshuam uas tshwm sim los ntawm cov chaw sib nqus, tsis muaj teeb meem nrog cov duab geometry thiab nws qhov pom tseeb. Koj tuaj yeem txuas lub LCD zaub ntawm lub brackets rau ntawm phab ntsa. Nws yog qhov yooj yim heev los ua qhov no. Hauv qhov no, daim duab yuav tsis poob nws qhov zoo.
Ntau npaum li cas lub LCD saib siv nyob ntawm tag nrho ntawm cov duab teeb tsa, tus qauv ntawm lub cuab yeej nws tus kheej, nrog rau cov yam ntxwv ntawm lub teeb liab. Yog li ntawd, daim duab no tuaj yeem ua ke nrog kev noj cov khoom siv tib lub teeb thiab cov plasma cov ntxaij vab tshaus, lossis qis dua. Tam sim no, nws paub tias lub zog noj ntawm LCD saib yuav raug txiav txim siab los ntawm lub zog ntawm cov teeb pom kev zoo uas muab lub teeb rov qab.
Nws kuj yuav tsum tau hais txog qhov me me LCD zaub. Nws yog dab tsi, lawv txawv li cas? Feem ntau ntawm cov khoom siv no tsis muaj lub teeb rov qab. Cov ntxaij vab tshaus no siv rau hauv tshuab xam zauv, saib. Cov khoom siv zoo li no muaj kev siv hluav taws xob tsawg kawg nkaus, yog li lawv tuaj yeem ua haujlwm autonomously mus txog ob peb xyoos.
Flaws
Txawm li cas los xij, cov khoom siv no muaj qhov tsis zoo. Hmoov tsis zoo, ntau qhov tsis txaus yog qhov nyuaj los kho.
Thaum muab piv nrog lub tshuab hluav taws xob hluav taws xob, cov duab meej ntawm LCD tuaj yeem tau txais ntawm tus qauv daws teeb meem nkaus xwb. Yuav kom ua tiav tus cwj pwm zoo ntawm lwm cov duab, koj yuav tau siv kev sib cuam tshuam.
LCD saib muajnruab nrab qhov sib piv, nrog rau qhov tsis zoo ntawm qhov tob tob. Yog tias koj xav nce qhov ntsuas thawj zaug, tom qab ntawd koj yuav tsum tau nce qhov ci ntsa iab, uas tsis tas yuav muab kev pom zoo. Qhov teeb meem no pom muaj nyob hauv Sony LCD li.
Tus nqi ntawm LCDs qeeb dua piv rau Plasma lossis CRT. Tam sim no, Overdrive thev naus laus zis tau tsim, tab sis nws tsis daws qhov teeb meem ceev.
Tseem muaj qee qhov nuances nrog saib cov ces kaum. Lawv tag nrho nyob ntawm qhov sib txawv. Electron-beam technology tsis muaj teeb meem li ntawd. LCD saib tsis muaj kev tiv thaiv los ntawm kev puas tsuaj, lub matrix tsis npog nrog iav, yog li yog tias koj nias nyuaj, koj tuaj yeem deform lub crystals.
Backlight
Piav seb nws yog - LCD, nws yuav tsum tau hais txog tus yam ntxwv no. Cov crystals lawv tus kheej tsis ci. Yog li ntawd, txhawm rau kom cov duab pom, nws yog ib qho tsim nyog yuav tsum muaj lub teeb ci. Nws tuaj yeem yog sab nraud lossis sab hauv.
Lub hnub rays yuav tsum tau siv thawj zaug. Qhov kev xaiv thib ob siv qhov khoom siv dag zog.
Raws li txoj cai, cov teeb nrog teeb pom kev zoo tau teeb tsa tom qab txhua txheej ntawm cov kua siv lead ua kua, vim lawv ci dhau los. Kuj tseem muaj ib sab illumination, uas yog siv hauv watches. LCD TVs (uas yog cov lus teb saum toj no) tsis txhob siv hom qauv no.
Raws li qhov teeb pom kev nyob ib puag ncig muaj kev txhawj xeeb, raws li txoj cai, cov xim dub thiab dawb ntawm cov saib thiab cov xov tooj ntawm tes ua haujlwm nyob rau hauv lub xub ntiag ntawm qhov chaw. Qab txheej nrog pixels yog tshwj xeeb matte reflective nto. Nws tso cai rau koj tawm ntawm tshav ntuj lossis hluav taws xob los ntawm cov teeb. Ua tsaug rau qhov no, koj tuaj yeem siv cov khoom siv hauv qhov tsaus ntuj, raws li cov tuam txhab tsim teeb pom kev zoo sab.
xov xwm ntxiv
Muaj cov lus qhia uas muab cov khoom siv sab nraud thiab ntxiv cov teeb hauv. Yav dhau los, qee lub watches uas muaj monochrome hom LCD npo siv lub teeb me me tshwj xeeb. Txawm li cas los xij, vim qhov tseeb tias nws siv ntau lub zog, qhov kev daws teeb meem no tsis muaj txiaj ntsig. Cov khoom siv zoo li no tsis siv hauv TV, vim lawv ua kom muaj cua sov ntau. Vim li no, cov kua siv lead ua kua raug rhuav tshem thiab hlawv tawm.
Thaum pib xyoo 2010, LCD TVs tau nthuav dav (nws yog dab tsi, peb tau tham saum toj no), uas muaj LED backlighting. Cov duab zoo li no yuav tsum tsis txhob totaub nrog cov ntxaij vab tshaus LED tiag tiag, qhov twg txhua pixel glows ntawm nws tus kheej, yog LED.
