Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Reexamination Certificate
2006-03-07
2006-03-07
Pham, Long (Department: 2814)
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
C349S088000, C250S225000, C438S030000
Reexamination Certificate
active
07009666
ABSTRACT:
A reflective cholesteric display that may be viewed under a wide range of ambient lighting conditions, ranging from complete darkness to bright sunlight. The display includes a chiral nematic liquid crystal material located between first and second substrates, an ambidextrous or bi-directional circular polarizer, a partial mirror, also referred to as a transflector, and a light source. The liquid crystal material includes focal conic and planar textures that are stable in the absence of an electric field. The ambidextrous circular polarizer is located adjacent to one of the substrates that constrain the liquid crystal material. The chiral nematic liquid crystal display may be operated in both a transmissive mode and a reflective mode.
REFERENCES:
patent: 4097127 (1978-06-01), Haas et al.
patent: 4398805 (1983-08-01), Cole
patent: 5146355 (1992-09-01), Prince et al.
patent: 5251048 (1993-10-01), Doane et al.
patent: 5384067 (1995-01-01), Doane et al.
patent: 5437811 (1995-08-01), Doane et al.
patent: 5453863 (1995-09-01), West et al.
patent: 5608553 (1997-03-01), Kim
patent: 5644330 (1997-07-01), Catchpole et al.
patent: 5673128 (1997-09-01), Ohta et al.
patent: 5677746 (1997-10-01), Yano
patent: 5691795 (1997-11-01), Doane et al.
patent: 5695682 (1997-12-01), Doane et al.
patent: 5734457 (1998-03-01), Mitsui et al.
patent: 5748277 (1998-05-01), Huang et al.
patent: 5764322 (1998-06-01), Mamiya et al.
patent: 5796454 (1998-08-01), Ma
patent: 5844540 (1998-12-01), Terasaki
patent: 5847798 (1998-12-01), Yang et al.
patent: 5896119 (1999-04-01), Evanicky et al.
patent: 5920368 (1999-07-01), Hatano et al.
patent: 5929956 (1999-07-01), Neijzen et al.
patent: 5939840 (1999-08-01), Nakagawa et al.
patent: 5940150 (1999-08-01), Faris et al.
patent: 5956113 (1999-09-01), Crawford
patent: 5965874 (1999-10-01), Aso et al.
patent: 5986727 (1999-11-01), Fukui et al.
patent: 6023316 (2000-02-01), Yano
patent: 6027222 (2000-02-01), Oki et al.
patent: 6034752 (2000-03-01), Khan et al.
patent: 6034753 (2000-03-01), Li et al.
patent: 6064455 (2000-05-01), Kim
patent: 6104455 (2000-08-01), Kashima
patent: 6122024 (2000-09-01), Molsen et al.
patent: 6124971 (2000-09-01), Ouderkirk et al.
patent: 6147724 (2000-11-01), Yoshii et al.
patent: 6154262 (2000-11-01), Ogura
patent: 6164790 (2000-12-01), Lee
patent: 6266113 (2001-07-01), Yamazaki et al.
patent: 6285422 (2001-09-01), Maeda et al.
patent: 6377321 (2002-04-01), Khan et al.
patent: 6483563 (2002-11-01), Khan et al.
patent: 6532052 (2003-03-01), Khan et al.
A. Khan et al. , P-49:Characterization of the Helical-Axis Distribution in Reflective Cholesteric LCD's, Proc. of SID 96, 607 (1996).
B. Taheri et al,5.3:Optical Properties of Bistable Cholesteric Reflective Displays, Proc. of SID 96, 39 (1996).
X.-Y. Huang et al.,LP-1: Late-News Poster: Gray Scale of Bistable Reflective Cholesteric Displays, Proc. of SID 98, 810 (1998).
D.-K. Yang et al.,40.1:Invited Address: Cholesteric Liquid-Crystal/Polymer-Gel Dispersions: Reflective Display Applications, Proc. of SID 92, 759 (1992).
D.-K Yang et al.,Cholesteric Liquid Crystal/Polymer Gel Dispersion Bistable At Zero Field, IDRC 1991, 49 (1991).
M. Schadt et al.,Surface-Induced Parallel Alignment of Liquid Crystals by Linearly Polymerized Photopolymers, Jpn. J. Appl. Phys. vol. 3, pp. 2155-2164 (Jul. 1992).
L. Schlangen et al.,Electro-Optics of Reflective Bistable Chiral Nematic Liquid Crystal Displays: Temperature, Cellgap and Polymide Thickness Dependence, Proc. of Asia Display 98, 123 (1998).
J. Doane et al.,S3-6 Front-Lit Flat Panel Display from Polymer Stabilized C holesteric Textures, Japan Display '92, 73 (1992).
Makow, D.M. et al. “Additive colour properties and color gamut of cholesteric liquid crystals”, Nature 276, 48-50 (1978).
Liquid Crystals—Applications and Uses (vol. 3), pp. 21-63, World Scientific Publishing Co., Pte. Ltd. (1992).
Liquid Crystals—Applications and Uses (vol. 1), pp. 171-194, World Scientific Publishing Co., Pte. Ltd. (1990).
Liquid Crystals—Applications and Uses (vol. 1), pp. 437-491, World Scientific Publishing Co., Pte. Ltd. (1990).
Liquid Crystals—Applications and Uses (vol. 2), pp. 98-104, World Scientific Publishing Co.,, Pte. Ltd. (1991).
Catchpole Clive
Khan Asad A.
Stefanov Michael E.
Kent Displays Incorporated
Pearne & Gordon LLP
Pham Long
Rao Shrinivas H.
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