Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Reexamination Certificate
2006-11-24
2009-06-23
Font, Frank G (Department: 2883)
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
C349S179000, C349S160000
Reexamination Certificate
active
07551252
ABSTRACT:
The invention provides a bistable twisted nematic liquid crystal display, comprising a first substrate having thereon a first conductive layer and a first alignment layer; a second substrate having thereon a second conductive layer and a second alignment layer; a liquid crystal layer in the first and second alignment layers; an alignment layer on each of the substrates, the alignment layer imparting a preferred direction for liquid crystal molecules near the alignment layer, and possessing different azimuthal and polar anchoring energies when used to align a liquid crystal layer: the alignment layers being rubbed in such a way to give a stable twist angle of the liquid crystal of φ where φ can be any value in between −45° to +45°; and wherein the d/p ratio of the liquid crystal layer is between the values of 0.15+0.5φ/π and 0.35+0.5φ/π.
REFERENCES:
patent: 4239345 (1980-12-01), Berreman et al.
patent: 4601544 (1986-07-01), Cheng et al.
patent: 5594464 (1997-01-01), Tanaka et al.
patent: 5796459 (1998-08-01), Bryan-Brown et al.
patent: 5995173 (1999-11-01), Barberi et al.
patent: 6038001 (2000-03-01), Ono et al.
patent: 6133975 (2000-10-01), Li et al.
patent: 6320571 (2001-11-01), Takahashi et al.
patent: 6469768 (2002-10-01), Lee
patent: 6573971 (2003-06-01), Yeung et al.
patent: 6707527 (2004-03-01), Kwok et al.
patent: 6784955 (2004-08-01), Kwok et al.
patent: 6847418 (2005-01-01), Park
patent: 2003/0147033 (2003-08-01), Stalder et al.
D.W. Berreman and W.R. Heffner;New Bistable Liquid-Crystal Twist Cell; J. Appl. Phys. 52 (4), (1981) 30032.
D.W. Berreman;Optics In Smoothly Varying Anisotropic Planar Structure: Application To Liquid-Crystal Twist Cell; J. Opt. Soc. Am. 63 (11), (1973) 1374.
H.S. Kwok;Parameter Space Representation of Liquid Crystal Display Operating Modes; J. Appl. Phys. 80 (7), (1996) 3687.
T.Z. Qian et al.;Dynamic Flow and Switching Bistability in Twisted Nematic Liquid Crystal Cells; Appl. Phys. Lett. 71 (5), (1997) 596.
Z. L. Xie and H.S. Kwok;Reflective Bistable Twisted Nematic Liquid Crystal Display; Jpn. J. Appl. Phys. 37 (1998) 2572.
Z.L. Xie and H.S. Kwok;New Bistable Twisted Nematic Liquid Cystal Displays; J. Appl. Phys. 84 (1), (1998) 77.
I. Dozov et al.;Fast Bistable Nematic Display Using Monostable Surface Switching; Appl. Phys. Lett. 70 (9), (1997).
Kwok Hoi-Sing
Li Yuet Wing
Yeung Fion Sze Yan
Cooper & Dunham LLP
Font Frank G
Katz Robert D.
Mooney Michael P
The Hong Kong University of Science and Technology
LandOfFree
Bistable twisted nematic liquid crystal display based on... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Bistable twisted nematic liquid crystal display based on..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bistable twisted nematic liquid crystal display based on... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4053688