Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Patent
1998-09-28
1999-11-30
Sikes, William L.
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
349123, G02F 11335
Patent
active
059951842
ABSTRACT:
The present invention relates to thin film retardation plates, such as cholesteric and A-plate compensators, for improving the viewing angle and contrast of liquid crystal displays. The A-plate is fabricated using a single substrate onto which a layer of polymerizable reactive mesogens (RMs) is solvent cast. Included in the RMs solution is an additive that migrates to the RM/air interface to lower the surface energy and generate an additive-rich surface layer, which in turn lowers the intrinsic tilt angle of the RMs at the air interface to between 25 degrees (25.degree.) and about zero degrees (0.degree.). The solvent is evaporated and the resulting film is polymerized in the liquid crystal phase to permanently orient the liquid crystal. The resulting film may be readily separated from the substrate and shaped into any desired pattern and combined to form novel compensators. In an alternative embodiment, a tilt may be provided by treating the substrate with an oblique alignment layer to form a compensator having a defined splay through the bulk of the thin film.
REFERENCES:
patent: 5155610 (1992-10-01), Hikmet et al.
patent: 5196953 (1993-03-01), Yeh et al.
patent: 5504603 (1996-04-01), Winker et al.
patent: 5557434 (1996-09-01), Winker et al.
patent: 5589963 (1996-12-01), Gunning, III et al.
patent: 5612801 (1997-03-01), Winker
patent: 5619352 (1997-04-01), Koch et al.
patent: 5638197 (1997-06-01), Gunning, III et al.
patent: 5667854 (1997-09-01), Yamada
Chung Young J.
Hanamoto Jane H.
Li Zili
Winker Bruce K.
Zhuang Zhiming
Dudek James
Rockwell Science Center LLC
Shinners Craig E.
Sikes William L.
LandOfFree
Thin film compensators having planar alignment of polymerized li does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Thin film compensators having planar alignment of polymerized li, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thin film compensators having planar alignment of polymerized li will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1679739