Vertical aligned liquid crystal display and method using dry deposited alignment layer films

A liquid crystal display device includes a first substrate, a dry alignment film deposited over the substrate, a second substrate coupled to the first substrate with the dry alignment film deposited over the second substrate therebetween and forming a cell gap, and a liquid crystal material formed i...

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Bibliographische Detailangaben
Hauptverfasser: GALLIGAN EILEEN ANN, LIEN SHUIIH ALAN, LACEY JAMES ANDREW, DOYLE JAMES PATRICK, ANDRY PAUL STEPHEN, CHAN KEVIN KOK, CAI CHEN, JOHN RICHARD ALLEN, CHAUDHARI PRAVEEN
Format: Patent
Sprache:eng
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Zusammenfassung:A liquid crystal display device includes a first substrate, a dry alignment film deposited over the substrate, a second substrate coupled to the first substrate with the dry alignment film deposited over the second substrate therebetween and forming a cell gap, and a liquid crystal material formed in the cell gap. The dry alignment film allows for a truly vertical alignment of molecules of the liquid crystal material such that the molecules form an angle of substantially 90° relative to the substrate. The dry alignment film can be an oxide layer, a nitride layer, an oxynitride layer or a silicon layer. This dry alignment layer can be treated to form a tilted homeotropic alignment, such that the liquid crystal molecules have a pretilt angle of 0.5 to 10 degrees from a substrate normal direction. The truly vertical alignment process can be incorporated with a ridge and fringe field process method to form a multidomain Vertical Alignment (VA) Liquid Crystal Display's (LCDs) which have wide viewing angles.