Liquid crystal cells – elements and systems – Nominal manufacturing methods or post manufacturing... – Changing liquid crystal phase
Patent
1997-12-02
2000-11-21
Sikes, William L.
Liquid crystal cells, elements and systems
Nominal manufacturing methods or post manufacturing...
Changing liquid crystal phase
349187, 349172, 349 85, G02F 113, G02F 11333, C09K 1902
Patent
active
061510963
ABSTRACT:
A mixture of a ferroelectric or anti-ferroelectric liquid crystal material and a monomer having a single photopolymeric functional group is injected in the space between two electrode substrates while heat is applied. After cooling of the mixture it is irradiated with ultraviolet light at a temperature at which the liquid crystal material remains in the smectic phase so as to polymerise the monomer. Areas of liquid crystal material requiring different threshold voltages for switching are thereby produced. Alternatively such areas can be produced by changing the conditions applied to a mixture of liquid crystal material with a suitable dopant so as to cause separation of the dopant out of the liquid crystal material in order to provide a polarity of nucleation points for controlling domain formation within the liquid crystal material. Such control of domain formation can be used to provide greyscale in a liquid crystal device.
REFERENCES:
patent: 4367924 (1983-01-01), Clark et al.
patent: 4712877 (1987-12-01), Okada et al.
patent: 4796980 (1989-01-01), Kaneko et al.
patent: 4904064 (1990-02-01), Lagerwall et al.
patent: 5434685 (1995-07-01), Pirs et al.
patent: 5646754 (1997-07-01), Takeda et al.
patent: 5812230 (1998-09-01), Sakaigawa et al.
patent: 5850272 (1998-12-01), Kabe et al.
patent: 5936690 (1999-08-01), Koden et al.
Kataoka et al., Texts of the 21.sup.st Liquid Debate, Sep. 10, 1995, "Liquid Crystalline Polymer Stabilized FLCDs".
Meyer et al., Le Journal De Physique, vol. 36, 1975, p. L-69, "Ferroelectric Liquid Crystals".
Jones et al., Ferroelectrics, 1991, vol. 121, pp. 91-102, The Importance of Dielectric Biaxiality for Ferroelectric Liquid Crystal Devices.
Jiu-Zhi et al., Liquid Crystals, 1987, vol. 2, No. 5, pp. 707-716, "Electrooptical Switching Properties of Uniform Layer Tilted Surface Stabiled Ferroelectric Liquid Crystal Devices".
Hikmet et al., Liquid Crystals, 1995, vol. 19, No. 1, pp. 65-76, "Ferroelectric Liquid Crystal Gels Network Stabilized Ferroelectric Displays".
Hughes et al., Liquid Crystals, 1993, vol. 13, No. 4, pp. 597-601, "A New Set of High Speed Matrix Addressing Schemes for Ferroelectric Liquid Crystal Displays".
Kanbe et al., Ferroelectrics, 1991, vol. 114, pp. 3-26, "High Resolution, Large Area FLC Display with High Graphic Performance".
Barberi et al., Appl. Phys. Lett. 58, 1991, pp. 2907-2909, "Electrochirally Controlled Bistable Surface Switching in Nematic Liquid Crystals".
Matsui et al.; Sony Corporation Research Center, "Two Types of Starlight Texture Produced Using a New Analog Gray-Scale Technique".
Bos et al., Mol. Cryst. Liq. Cryst., 1984, vol. 113, pp. 329-339, The pi-Cell: A Fast Liquid-Crystal Optical-Switching Device.
Gass Paul Antony
Jones John Clifford
Koden Mitsuhiro
McDonnell Damien Gerard
Miyazaki Aya
Chowdhury Tarifur R.
Sharp Kabushiki Kaisha
Sikes William L.
The Secretary of State for Defence in Her Britannic Majesty's Go
LandOfFree
Liquid crystal display including dopant phase-separated from liq does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Liquid crystal display including dopant phase-separated from liq, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquid crystal display including dopant phase-separated from liq will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1262968