Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Reexamination Certificate
2007-04-10
2007-04-10
Schechter, Andrew (Department: 2871)
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
C349S115000, C349S175000, C349S176000
Reexamination Certificate
active
10606286
ABSTRACT:
Provided herein is a retardation optical element10that produces no bright and dark fringes on a displayed image even when placed between a liquid crystal cell104and a polarizer102B and thus can effectively prevent lowering of display quality. The retardation optical element10includes a retardation layer12having a cholesteric-regular molecular structure with liquid crystalline molecules in planar orientation. The helical pitch in the molecular structure of the retardation layer12is so adjusted that the retardation layer12can, owing to its molecular structure, selectively reflect light whose wavelength falls in a range different from the wave range of light incident on the retardation layer12(the selective reflection wave range of the retardation layer is either shorter or longer than the wave range of the incident light). Further, the retardation layer12has two opposite main surfaces (larger surfaces)12A and12B that are perpendicular to each other in the direction of thickness, where the directions of the directors Da of the liquid crystalline molecules on the entire area of the one surface12A are substantially the same, and those of the directors Db of the liquid crystalline molecules on the entire area of the other surface12B are also substantially the same.
REFERENCES:
patent: 4385806 (1983-05-01), Fergason
patent: 5241408 (1993-08-01), Ishikawa et al.
patent: 5619352 (1997-04-01), Koch et al.
patent: 5688566 (1997-11-01), Broer et al.
patent: 5863457 (1999-01-01), Hasebe et al.
patent: 5876837 (1999-03-01), Sailer et al.
patent: 6674505 (2004-01-01), Van De Witte et al.
patent: 6795139 (2004-09-01), Kameyama et al.
patent: 6800220 (2004-10-01), Yumoto et al.
patent: 57-165480 (1982-10-01), None
patent: 3-67219 (1991-03-01), None
patent: 4-322223 (1992-11-01), None
patent: 7-258638 (1995-10-01), None
patent: 9-133810 (1997-05-01), None
patent: 10-508882 (1998-09-01), None
patent: 11-160539 (1999-06-01), None
patent: 11-293252 (1999-10-01), None
patent: 2000-387682 (2000-12-01), None
Dai Nippon Printing Co. Ltd.
Oliff & Berridg,e PLC
Schechter Andrew
Vu Phu
LandOfFree
Cholesteric reflective retardation optical element with... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Cholesteric reflective retardation optical element with..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cholesteric reflective retardation optical element with... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3748140