Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Patent
1996-12-12
1998-05-12
Sikes, William L.
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
349118, 349159, 349 64, G06F 11335, G06F 11333
Patent
active
057513902
ABSTRACT:
A transmissive, backlit color twisted-nematic or super-twisted-nematic liquid crystal display employing a front fiber-optic faceplate or optical equivalent as a front retaining element of a liquid crystal cell that increases viewing angle between the display and a viewer while minimizing or eliminating undesirable variations in luminance, contrast ratio and chromaticity is described. The fiber-optic faceplate or optical equivalent includes cylindrical optical features and interstitial cladding material of greater optical index than the cylindrical optical features. The interstitial cladding material may include an opaque mask blocking layer to prevent the interstitial apertures from diffracting off-axis light into an observer's viewing cone. In particular the liquid crystal display includes dual negative retarders, and a light shaping element such as a brightness enhancing film on the illumination source that increase the effective viewing angle between the display and a viewer while minimizing undesirable variations in display chromaticity, luminance, and contrast ratio. The front fiber-optic faceplate or optical equivalent works in conjunction with the dual negative retarders and the light shaping element to provide an improved contrast ratio with a perfectly symmetric viewing angle and to eliminate grey scale inversions.
REFERENCES:
patent: 5175638 (1992-12-01), Kanemoto et al.
patent: 5179458 (1993-01-01), Fukui
patent: 5227903 (1993-07-01), Miyazawa et al.
patent: 5249071 (1993-09-01), Yoshimizu et al.
patent: 5440413 (1995-08-01), Kikuchi et al.
patent: 5442467 (1995-08-01), Silverstein et al.
patent: 5528400 (1996-06-01), Arakawa
patent: 5638200 (1997-06-01), Xu
Crawford Gregory P.
Fiske Thomas G.
Silverstein Louis D.
McBain Nola Mae
Sikes William L.
Small Jonathan A.
Ton Toan
Xerox Corporation
LandOfFree
Enhanced off-axis viewing performance of liquid crystal display does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Enhanced off-axis viewing performance of liquid crystal display , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Enhanced off-axis viewing performance of liquid crystal display will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-986806