Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1991-11-26
1994-04-19
Sikes, William L.
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359 51, 359 70, 359 73, 359101, G02F 1133
Patent
active
053051262
ABSTRACT:
A polymer dispersed liquid crystal material (PDLC) device is fabricated by sealing a composite layer mixture of components comprising a polymer and liquid crystal material while both are in their liquid phase in a gap portion formed between two substrates of the device. A predetermined directional alignment is transmitted to the polymer via the liquid crystal material by means, for example, of formed directional alignment on surfaces in contact with the composite layer, such as, by deposited alignment films on a surface of at least one of the substrates. The predetermined directional alignment of the polymer is thereafter fixed by means of a polymer hardening method, such as, for example, by polymerization of a polymer precursor, so that the predetermined directional alignment of the polymer is permanently retain within the liquid crystal material, i.e., the polymer is in a solid phase and the liquid crystal material remains in its liquid phase. For better results, a chiral component and/or a light absorbing component may be added to the liquid crystal material.
REFERENCES:
patent: 3600060 (1991-08-01), Kettering
patent: 3872050 (1975-03-01), Benton et al.
patent: 4613207 (1986-09-01), Fergason
patent: 4685771 (1987-08-01), West et al.
patent: 4688900 (1987-08-01), Doane et al.
patent: 4944576 (1990-07-01), Lackep et al.
patent: 4949204 (1991-02-01), Doane et al.
patent: 5093735 (1992-03-01), Doane et al.
patent: 5188760 (1993-02-01), Hikmet et al.
Makromol. Chem. 189, "In-situ photopolymerization of an oriented liquid-crystalline acrylate", D. Broer et al., 1988, pp. 185-194.
Makromol. Chem. 190, "In-situ photopolymierzation of an oriented liquid-crystalline acrylate, 3.sup.a ", D. Broer et al., 1989, pp. 2255-2268.
Makromol. Chem. 190, "In-situ photopolymerization of an oriented liquid-crystalline acrylate, 4.sup.a) ", D. Broer et al., 1989, pp. 3201-3215.
Liquid Crystals, "Anisotropic gels and plasticized networks formed by liquid crystal molecules", R. A. M. Hikmet, Philips Research Laboratories, vol. 9, No. 2, 1991, pp. 405-416.
Mol. Crys. Liq. Cryst., "From Liquid Crystalline Molecules to Anisotropic Gels", R. A. M. Hikmet, Philips Research Laboratories, vol. 198, 1991, pp. 357-370.
Mol. Crys. Liq. Cryst., "Cholexteric Networks Containing Free Molecules", R. A. M. Hikmet et al., Philips Research Laboratories, vol. 200, 1991, pp. 197-204.
Pure & Appl. Chem., "Synthesis, structure and properties of liquid crystalline polymers", by M. Engel et al., vol. 57, No. 7, pp. 1009-1015, 1985.
Polymer Liquid Crystals, "Synthesis, Structure, and Properties of Liquid Crystalline Side Chain Polymers", by H. Finkelmann, 1982, pp. 35-63.
Paul S. Drzaic et al., "High-Brightness Reflective Displays Using Nematic Droplet/Polymer Films", SID 90 Digest, No. 12, pp. 210-213, May 1, 1990.
Kobayashi Hidekazu
Samizu Kiyohiro
Wu Jin-Jei
Carothers, Jr. W. Douglas
Mai Huy
Seiko Epson Corporation
Sikes William L.
LandOfFree
Polymer-dispersed liquid crystal material with in-situ polymeriz does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Polymer-dispersed liquid crystal material with in-situ polymeriz, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polymer-dispersed liquid crystal material with in-situ polymeriz will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-24440