Normally white twisted nematic LCD with positive uniaxial and ne

Details Normally white twisted nematic LCD with positive uniaxial and ne Normally white twisted nematic LCD with positive uniaxial and ne

1998-05-20

1999-01-12

Sikes, William L.

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

349118, G02F 11335

Patent

active

058596810

ABSTRACT:
A normally white twisted nematic liquid crystal display is provided for outputting improved viewing characteristics which are defined by high contrast ratios and reduced inversion. The display includes both positive and negative retardation films, the negative films being biaxial and defined by n.sub.x >n.sub.y >n.sub.z in certain embodiments where the "z" direction is substantially perpendicular to the film plane and the "x" and "y" directions are substantially parallel to the film plane. By providing the positive and biaxial negative retarders with specific retardation values and/or ratios, improved viewing characteristics are provided. According to other embodiments, a positive and a negative (uniaxial or biaxial) retarder may be provided on only one side of the liquid crystal layer.

REFERENCES:
patent: 4889412 (1989-12-01), Clerc et al.
patent: 5071997 (1991-12-01), Harris
patent: 5138474 (1992-08-01), Arakawa
patent: 5184236 (1993-02-01), Miyashita et al.
patent: 5189538 (1993-02-01), Arakawa
patent: 5213582 (1993-05-01), Arakawa et al.
patent: 5227903 (1993-07-01), Miyazawa et al.
patent: 5291323 (1994-03-01), Ohnishi et al.
patent: 5344916 (1994-09-01), Harris et al.
patent: 5406396 (1995-04-01), Akatsuka et al.
patent: 5430565 (1995-07-01), Yamanouchi et al.
patent: 5430566 (1995-07-01), Sakaya et al.
patent: 5504603 (1996-04-01), Winker et al.
patent: 5557434 (1996-09-01), Winker et al.
patent: 5570214 (1996-10-01), Abileah et al.
patent: 5576861 (1996-11-01), Abileah et al.
patent: 5594568 (1997-01-01), Abileah et al.
patent: 5612801 (1997-03-01), Winker
patent: 5638197 (1997-06-01), Gunning, III et al.
Patent Abstracts of Japan, 07253573, Mar. 10, 1995.

Affiliated with

Also associated with

Rating

Normally white twisted nematic LCD with positive uniaxial and ne does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Normally white twisted nematic LCD with positive uniaxial and ne, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Normally white twisted nematic LCD with positive uniaxial and ne will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1520946