Mfundo Zoyambira pa LCD Operation?

Zoyambira za LCD Operation

news1_1Liquid crystal displays (LCDs) ndi teknoloji yowonetsera chabe.Izi zikutanthauza kuti samatulutsa kuwala;m'malo, amagwiritsa ntchito kuwala kozungulira m'chilengedwe.Pogwiritsa ntchito kuwala kumeneku, amawonetsa zithunzi pogwiritsa ntchito mphamvu zochepa kwambiri.Izi zapangitsa LCD kukhala ukadaulo womwe umakonda nthawi zonse kugwiritsa ntchito mphamvu zochepa komanso kukula kocheperako kuli kofunikira.

Liquid crystal (LC) ndi chinthu cha organic chomwe chili ndi mawonekedwe amadzimadzi komanso mawonekedwe a crystal molecular.Mu madziwa, mamolekyu ooneka ngati ndodo nthawi zambiri amakhala ofanana, ndipo gawo lamagetsi lingagwiritsidwe ntchito kuwongolera mamolekyu.Ma LCD ambiri masiku ano amagwiritsa ntchito mtundu wa kristalo wamadzimadzi wotchedwa Twisted Nematic (TN).Onani chithunzi pansipa kuti muwone momwe mamolekyu amayendera.

Liquid Crystal Display (LCD) imakhala ndi magawo awiri omwe amapanga "botolo lathyathyathya" lomwe lili ndi madzi osakaniza a crystal.Mbali zamkati za botolo kapena selo zimakutidwa ndi polima yomwe imayikidwa kuti igwirizane ndi mamolekyu amadzimadzi amadzimadzi.Mamolekyu amadzimadzi a kristalo amalumikizana pamwamba pomwe akuwongolera.Pazida zopotoka za Nematic, malo awiriwa amakhomeredwa m'malo amodzi, ndikupanga kupindika kwa madigiri 90 kuchokera pamwamba kupita kwina, onani chithunzi pansipa.

Kapangidwe ka helical kameneka kamatha kuwongolera kuwala.Polarizer imayikidwa kutsogolo ndipo chowunikira / chowunikira chimayikidwa kumbuyo kwa selo.Pamene polarized kuwala polarized kudutsa kutsogolo polarizer amakhala linearly polarized.Kenako imadutsa galasi lakutsogolo ndikuzunguliridwa ndi mamolekyu amadzimadzi amadzimadzi ndikudutsa mugalasi lakumbuyo.Ngati chowunikiracho chikuzunguliridwa ndi madigiri 90 kupita ku polarizer, kuwalako kumadutsa mu analyzer ndikuwonekeranso mu selo.Woyang'anira adzawona maziko a chiwonetserocho, chomwe pankhaniyi ndi imvi yasiliva ya chowunikira.

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Galasi la LCD lili ndi ma conductor amagetsi owoneka bwino omwe amayikidwa mbali zonse za galasilo pokhudzana ndi madzimadzi amadzimadzi ndipo amagwiritsidwa ntchito ngati maelekitirodi.Ma electrode awa amapangidwa ndi Indium-Tin Oxide (ITO).Pamene chizindikiro choyenera cha galimoto chikugwiritsidwa ntchito pa ma electrode a selo, gawo lamagetsi limayikidwa pa selo.Mamolekyu amadzimadzi amadzimadzi amazungulira polowera kumunda wamagetsi.Kuwala kolowera kokhala ndi polarized kumadutsa mu selo osakhudzidwa ndipo kumatengedwa ndi analyzer yakumbuyo.Woyang'anitsitsa amawona khalidwe lakuda pamtundu wa imvi wonyezimira, onani chithunzi 2. Pamene magetsi atsekedwa, mamolekyu amamasuka kubwerera ku mapangidwe awo a 90 digiri.Izi zimatchedwa chithunzi chabwino, mawonekedwe owonera.Kupititsa patsogolo ukadaulo wofunikirawu, LCD yokhala ndi maelekitirodi angapo osasankhidwa ndikusankha voteji pamaelekitirodi, mitundu ingapo imatha kupezeka.

Zotukuka zambiri mu TN LCD zapangidwa.Super Twisted Nematic (STN) Liquid Crystal zakuthupi zimapereka ngodya yopindika yapamwamba (>=200° vs. 90°) yomwe imapereka kusiyanitsa kwapamwamba komanso kowonera bwino.Komabe, choyipa chimodzi ndi mawonekedwe a birefringence, omwe amasintha mtundu wakumbuyo kukhala wachikasu-wobiriwira ndi mtundu wamunthu kukhala wabuluu.Mtundu wakumbuyo uwu ukhoza kusinthidwa kukhala imvi pogwiritsa ntchito fyuluta yapadera.

Kutsogola kwaposachedwa kwakhala koyambitsa Mafilimu omwe amalipidwa ndi Super Twisted Nematic (FSTN).Izi zimawonjezera filimu yochedwetsa ku chiwonetsero cha STN chomwe chimalipira mtundu wowonjezeredwa ndi birefringence effect.Izi zimalola kuti chiwonetsero chakuda ndi choyera chipangidwe.


Nthawi yotumiza: Jan-19-2022

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