Invention Grant
- Patent Title: Vertical aligned liquid crystal display and method using dry deposited alignment layer films
- Patent Title (中): 垂直取向液晶显示器和使用干沉积取向膜的方法
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Application No.: US09536016Application Date: 2000-03-27
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Publication No.: US06724449B1Publication Date: 2004-04-20
- Inventor: Paul Stephen Andry , Chen Cai , Kevin Kok Chan , Praveen Chaudhari , James Patrick Doyle , Eileen Ann Galligan , Richard Allen John , James Andrew Lacey , Shui-Chih Alan Lien
- Applicant: Paul Stephen Andry , Chen Cai , Kevin Kok Chan , Praveen Chaudhari , James Patrick Doyle , Eileen Ann Galligan , Richard Allen John , James Andrew Lacey , Shui-Chih Alan Lien
- Main IPC: G02F11337
- IPC: G02F11337

Abstract:
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.
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