Yiziphi Izisekelo Zokusebenza kwe-LCD?

Izisekelo Zokusebenza kwe-LCD

news1_1Izibonisi ze-Liquid crystal (LCDs) ziwubuchwepheshe bokubonisa okwenziwayo.Lokhu kusho ukuthi azikhiphi ukukhanya;kunalokho, basebenzisa ukukhanya okuzungezile endaweni ezungezile.Ngokukhohlisa lokhu kukhanya, babonisa izithombe zisebenzisa amandla amancane kakhulu.Lokhu kwenze ama-LCD kwaba ubuchwepheshe obukhethwayo noma nini lapho ukusetshenziswa kwamandla okuphansi kanye nosayizi ohlangene kubalulekile.

I-Liquid crystal (LC) iwuketshezi oluphilayo olunakho kokubili uketshezi kanye nesakhiwo se-crystal molecular.Kulolu ketshezi, ama-athomu amise okwenduku ajwayele ukuhleleka ngokulandelana, futhi insimu kagesi ingasetshenziswa ukulawula ama-molecule.Ama-LCD amaningi namuhla asebenzisa uhlobo lwekristalu oluwuketshezi olubizwa nge-Twisted Nematic (TN).Bheka umfanekiso ngezansi ukuze ubone okubonakalayo kokuhambisana kwe-molecule.

I-Liquid Crystal Display (LCD) iqukethe ama-substrates amabili akha "ibhodlela eliyisicaba" eliqukethe ingxube yekristalu ewuketshezi.Izingxenye zangaphakathi zebhodlela noma iseli zimbozwe nge-polymer eboshiwe ukuze iqondanise ama-molecule e-liquid crystal.Ama-molecule e-crystal ewuketshezi aqondana endaweni lapho kubhafa khona.Kumadivayisi e-Twisted Nematic, lezi zindawo ezimbili ziboshwe nge-orthogonal enye kwenye, kwakheka i-twist engu-90 degree ukusuka kwenye indawo kuye kwenye, bheka umfanekiso ongezansi.

Lesi sakhiwo se-helical sinamandla okulawula ukukhanya.I-polarizer isetshenziswa ngaphambili futhi i-analyzer/reflector isetshenziswa ngemuva kweseli.Uma ukukhanya okwenziwa nge-polarized kudlula ku-polarizer yangaphambili iba yi-polarized ngomugqa.Ibe isidlula engilazini yangaphambili futhi ijikeleziswa ama-molecule e-crystal ewuketshezi futhi idlule engilazini yangemuva.Uma i-analyzer izungeziswe ngamadigri angu-90 ku-polarizer, ukukhanya kuzodlula ku-analyzer futhi kuboniswe emuva ngeseli.Umbukeli uzobona ingemuva lesibonisi, kulokhu okumpunga okusiliva kwesibonisi.

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Ingilazi ye-LCD inamakhondatha kagesi akhanyayo abekwe ohlangothini ngalunye lwengilazi axhume uketshezi lwekristalu oluwuketshezi futhi asetshenziswa njengama-electrode.Lawa ma-electrode enziwe nge-Indium-Tin Oxide (ITO).Uma isignali yokushayela efanelekile isetshenziswa kuma-electrode eseli, inkambu kagesi iyasethwa kulo lonke iseli.Ama-molecule e-crystal ewuketshezi azojikeleza aqonde endaweni kagesi.Ukukhanya kwe-polarized okungenayo kudlula kuseli kungathinteki futhi kudonswa i-analyzer yangemuva.Isibukeli sibona uhlamvu olumnyama kungemuva elimpunga, bheka umfanekiso 2. Uma inkambu kagesi ivaliwe, ama-molecule akhululeka abuyele esakhiweni sawo sokusonteka okungama-90 degree.Lokhu kubizwa ngokuthi isithombe esihle, imodi yokubuka ekhanyayo.Ukuqhubekisela phambili lobu buchwepheshe obuyisisekelo, i-LCD enama-electrode amaningi angakhethwa futhi ngokukhetha ifaka i-voltage kuma-electrode, amaphethini ahlukahlukene angafinyelelwa.

Intuthuko eminingi kuma-TN LCDs yenziwe.I-Super Twisted Nematic (STN) Liquid Crystal material inikeza i-engeli yokusonta ephezulu (>=200° vs. 90°) ehlinzeka ngokugqama okuphezulu kanye ne-engeli yokubuka engcono.Nokho, isici esisodwa esingesihle umphumela we-birefringence, oshintsha umbala wangemuva ube ophuzi-luhlaza kanye nombala wezinhlamvu ube luhlaza okwesibhakabhaka.Lo mbala wangemuva ungashintshwa ube mpunga ngokusebenzisa isihlungi esikhethekile.

Ukuthuthukiswa kwakamuva kube ukwethulwa kwezibonisi zeFilimu ezinxeshezelwe nge-Super Twisted Nematic (FSTN).Lokhu kungeza ifilimu yokubuyisela emuva kusibonisi se-STN esinxephezela umbala owengezwe umthelela we-birefringence.Lokhu kuvumela isibonisi esimnyama nesimhlophe ukuthi sikhiqizwe.


Isikhathi sokuthumela: Jan-19-2022

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