Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Patent
1994-09-30
1998-02-10
Sikes, William L.
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
349117, G02F 11333
Patent
active
057174741
ABSTRACT:
A multi-domain halftone gray scale active matrix liquid crystal display utilizing a mono-gap configuration for achieving a very wide viewing angle at a low-cost. The substrate of the display has areas having a rub or an alignment of different directions from the direction of the rub or alignment in other adjacent areas. Each pixel of the gray scale matrix has a plurality of subpixels such that each subpixel turns on at a different voltage than that of the other subpixels. The areas involving different rubs or alignments on the substrates may be areas of pixels or subpixels. At least one compensating retardation layer is formed on the display. The technique of enabling the combining of multiple domains and compensation with halftone grayscale pixels results in a display having significantly wider viewing angles than either a multi-domain display or a halftone grayscale display, whether compensated for or not.
REFERENCES:
patent: 4632514 (1986-12-01), Ogawa et al.
patent: 5126865 (1992-06-01), Sarma
patent: 5204659 (1993-04-01), Sarma
patent: 5410422 (1995-04-01), Bos
patent: 5473455 (1995-12-01), Koike et al.
Abstract "Liq crystal display with cryolite layers-contg, magnesium fluoride at interface with atmos., impoves signal visibility", 22 Jun. 1982, JP57100411 A (Suwa Seikosha KK) from WPI Database, Derwent Pubs.
H. Ong, "S7-4 New Normally White Negative Birefringence Film Compensated Twisted Nematic LCD's with Largest Viewing Angle Performance," Japan Display 92, pp. 247-250.
K. Takatori et al., "S15-6 A Complementary TN LCD with Wide-Viewing-Angle Grayscale," Japan Display 92, pp. 591-594.
K. Sarma et al., "Active Matrix LCDs Using Gray Scale in Halftone Methods,", Proceedings of the SID, vol. 31/1, 1990, pp. 7-11.
Y. Koike et al, "41.5: Late-News Paper: A Full Color TFT-LCD with a Domain Divided Twisted-Nematic Structure," SID92 Digest (ISSN0097-0966X/92/0000-798) pp. 798-801.
M. Schadt et al., "Surface-Induced Parallel Alignment of Liquid Crystals by Linearly Polymerized Photopolymers," Jpn. J. Appl. Phys. vol. 33 (1992) pt. 1, No. 7, pp. 2155-2164.
C. Gooch et al., "The optical properties of twisted nematic liquid crystal structures with twist angles .ltorsim.90.degree.,"J. Phys. D: Appl. Phys., vol. 8, 1975, Great Britain, pp. 1575-1584.
Carlson Brett
Dudek James A.
Honeywell Inc.
Shudy Jr. John G.
Sikes William L.
LandOfFree
Wide-viewing angle multi-domain halftone active matrix liquid cr does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Wide-viewing angle multi-domain halftone active matrix liquid cr, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wide-viewing angle multi-domain halftone active matrix liquid cr will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2081140