Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Patent
1997-06-24
2000-11-07
Malinowski, Walter
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
349128, 349136, G02F 11337, G02F 1141
Patent
active
061444332
ABSTRACT:
A twisted liquid crystal device includes a liquid crystal layer and first and second alignment layers disposed in opposite sides of the liquid crystal layer. The first and second alignment layers have respective alignment directions which are mutually inclined. A first linear polarizer is disposed on the opposite side of the first alignment layer to the liquid crystal layer. Electrodes apply a variable voltage across the liquid crystal layer which has a twisted liquid crystal structure. The liquid crystal layer is arranged for operation in surface switching mode with first and second regions of the liquid crystal layer adjacent the alignment layers being mutually optically de-coupled so as to define, within the liquid crystal layer when in use, a pair of separate, active optical retarders having mutually inclined optic axes.
REFERENCES:
patent: 4097128 (1978-06-01), Matsumoto et al.
patent: 4231639 (1980-11-01), Banda
patent: 4241339 (1980-12-01), Ushiyama
patent: 4378955 (1983-04-01), Bleha, Jr. et al.
patent: 4385806 (1983-05-01), Fergason
patent: 4566758 (1986-01-01), Bos
patent: 4688900 (1987-08-01), Doanne
patent: 4767190 (1988-08-01), Dir et al.
patent: 4842379 (1989-06-01), Oishi et al.
patent: 4952029 (1990-08-01), Hayashi et al.
patent: 5090794 (1992-02-01), Hatano et al.
patent: 5124824 (1992-06-01), Kozaki et al.
patent: 5126868 (1992-06-01), Kizaki et al.
patent: 5145546 (1992-09-01), Yuasa et al.
patent: 5221978 (1993-06-01), Heynderickx et al.
patent: 5231521 (1993-07-01), Johnson et al.
patent: 5243455 (1993-09-01), Johnson et al.
patent: 5303075 (1994-04-01), Wada et al.
patent: 5343313 (1994-08-01), Fergason
patent: 5414541 (1995-05-01), Patel et al.
patent: 5440413 (1995-08-01), Kikuchi et al.
patent: 5496498 (1996-03-01), Toyooka et al.
patent: 5570211 (1996-10-01), Hanaoka et al.
patent: 5680184 (1997-10-01), Nishino
patent: 5745206 (1998-04-01), Koike et al.
patent: 5764325 (1998-06-01), Bryan-Brown et al.
patent: 5781262 (1998-07-01), Suzuki et al.
patent: 5796459 (1998-08-01), Bryan-Brown et al.
patent: 5808716 (1998-09-01), Gass et al.
"Method to Suppress Reverse Twist State for Ultraviolet Two-Domain Liquid Crystal Display and Other Splay Type Two-Domain Liquid Crystal Displays", IBM Technical Disclosure Bulletin, vol. 40, No. 5, May 1997, pp. 77-78.
European Search Report for European Patent Application Ser. No. 97304483.7 dated Nov. 17, 1998.
Search Report for Application No. 97304496.9; Dated Apr. 16, 1998.
S. Palmer; Applied Optics, May 1, 1996, vol. 35, No. 3, "Optical Angular Properties of Twisted-Nematic Liquid-Crystal Cells with Twist Angles of Less Than 90.degree.".
U.S. Patent Application Ser. No. 08/880,456; Filed Jun. 24, 1997.
European Search Report related to European Patent Application No. 97304496.9 dated Aug. 18, 1998.
Itoh Y. et al.; "A Double-Layer Electrically Controlled Birefringence Liquid-Crystal Display with a Wide-Viewing-Angle Cone" Japanese Journal of Applied Physics, Part 2 (Letters), Jul. 15, 1991, Japan, vol. 30, No. 7B, pp. L1296-L1299.
Saito, S.: "Viewing Angle Characteristics of ECB Type Multi-Colored LCD with Non-Twist", Molecular Crystals and Liquid Crystals, 1986, UK, vol. 138, No. 1-4, pp. 187-210.
Takahashi T. et al.: "Improvement of Multiplexiability of Double-Layered Homogeneously Oriented Nematic LCD by Simultaneously Driving Method" Electronics and Communications in Japan, Part 2 (Electronics), Dec. 1991, USA, vol. 74, No. 12, pp. 49-58.
Kuo C--L et al.: "Wide-Viewing-Angle Reflective LCD Using A Film-Compensated HAN Cell with Single Polarizer" Proceedings of Fifteenth International Display Research Conference, Asia Display '95, Proceedings of 15.sup.th International Display Research Conference, Hamamatsu, Japan, Oct. 16-18, 1995, pp. 135-138.
Search Report for Application No. GB 9613364.0; Dated Sep. 26, 1996.
S. Pancharatnam, Proc. Ind. Acad Sci., vol. 41a, pp. 130-136, 1955, "Achromatic Combinations of Birefringent Plates, Part I".
S. Pancharatnam, Proc. Ind. Acad Sci., vol. 41a, pp. 137-144, 1955, "Achromatic combinations of Birefringent Plates, Part II".
P. D. Berezin et al., Sov. J. Quant. Electron., vol. 3, No. 1, pp. 78-79, 1973, "Electroopic Switching in Oriented Liquid-Crystal Films".
P.J. Bos et al., Mol. Cryst. Liq. Cryst., vol. 113, pp. 329-339, 1984, "The pi-Cell: A Fast Liquid-Crystal Optical-Switching Device".
A. Sato, Display Devices, pp. 18-21, 1994, Reflection Formats for Color LCDs Solve Power-Consumption Problems.
G.D. Sharp et al., SID 93 Digest, pp. 665-668, 1993, "P-60: Color Switching Using Ferroelectric Liquid Crystals".
U.S. Application Ser. No. 08/880,456, filed Jun. 23, 1997 in the name of Tillin et al.
Tillin Martin David
Towler Michael John
Malinowski Walter
Sharp Kabushiki Kaisha
LandOfFree
LCD in which two regions of liquid crystal layer act as two opti does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with LCD in which two regions of liquid crystal layer act as two opti, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and LCD in which two regions of liquid crystal layer act as two opti will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1646744