Patents by Inventor Oleg Lavrentovich
Oleg Lavrentovich has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Publication number: 20180231846Abstract: A method for aligning molecular orientations of liquid crystals and/or polymeric materials into spatially variant patterns uses metamasks. When non-polarized or circularly polarized light is transmitted through or reflected by the metamasks, spatially varied polarization direction and intensity patterns of light can be generated. By projecting the optical patterns of the metamasks onto substrates coated with photoalignment materials, spatially variant molecular orientations encoded in the polarization and intensity patterns are induced in the photoalignment materials, and transfer into the liquid crystals. Possible designs for the metamask use nanostructures of metallic materials.Type: ApplicationFiled: August 8, 2016Publication date: August 16, 2018Applicant: Kent State UniversityInventors: Qi-Huo WEI, Yubing GUO, Miao JIANG, Oleg LAVRENTOVICH, Chenhui PENG, Kai SUN
-
Patent number: 8404318Abstract: The present invention comprises a device and method for ordering molecules of lyotropic chromonic liquid crystals to aligned structure of a dried film. An example of an aligned film may be transparent to visible light but not transparent to polarized light in the ultraviolet and/or infrared portions of the electromagnetic spectrum. A shearing device having a shearing tool and a repelling pad may repel the solvent and provide a shear force to shear the LCLC dissolved in the solvent as a film on the surface of a substrate. A method of making an aligned lyotropic chromonic liquid crystal-based film comprises providing a mixture of a lyotropic chromonic liquid crystal material in a solvent for the liquid crystal material, applying the mixture to a substrate, shearing the lyotropic chromonic liquid crystal with a shearing device and removing the solvent to produce an aligned lyotropic chromonic liquid crystal-based film.Type: GrantFiled: June 16, 2010Date of Patent: March 26, 2013Assignee: Kent State UniversityInventors: Andrii B. Golovin, Oleg Lavrentovich
-
Publication number: 20110085229Abstract: Electrically reconfigurable metamaterial with spatially varied refractive index is proposed for applications such as optical cloaks and lenses. The apparatus and method comprises a metamaterial in which the refractive indices are modified in space and time by applying one or more electric fields. The metamaterials are electrically controllable and reconfigurable, and consist of metal (gold, silver, etc.) particles of different shapes, such as rods, with dimension much smaller than the wavelength of light, dispersed in a dielectric medium, for example, fluids such as water, toluene, oil, glycerine, thermotropic liquid crystal, lyotropic liquid crystal, polymer, elastomer, and other suitable materials placed in a non-uniform electric field.Type: ApplicationFiled: October 13, 2009Publication date: April 14, 2011Applicant: KENT STATE UNIVERSITYInventors: Oleg Lavrentovich, Andrii B. Golovin
-
Patent number: 7777850Abstract: Methods for treating aligning substrates produces uniform alignment of liquid crystals in at least two modes. The method is based on the treatment of liquid crystal aligning substrates with a collimated or partially collimated plasma beam. In one embodiment, the method comprises a step of bombarding an aligning substrate with at least one plasma beam from a plasma beam source at a designated incident angle to align the atomic/molecular structure or the surface profile of the aligning substrate in at least one aligned direction.Type: GrantFiled: September 4, 2008Date of Patent: August 17, 2010Assignee: Kent State UniversityInventors: Liang-Chy Chien, Andriy Dobrovolskyy, Oleg Yaroshchuk, Oleg Lavrentovich
-
Patent number: 7714965Abstract: Methods for treating aligning substrates produces uniform alignment of liquid crystals in at least two modes. The method is based on the treatment of liquid crystal aligning substrates with a collimated or partially collimated plasma beam. In one embodiment, the method comprises a step of bombarding an aligning substrate with at least one plasma beam from a plasma beam source at a designated incident angle to align the atomic/molecular structure or the surface profile of the aligning substrate in at least one aligned direction.Type: GrantFiled: May 17, 2004Date of Patent: May 11, 2010Assignee: Kent State UniversityInventors: Liang-Chy Chien, Andriy Dobrovolskyy, Oleg Yaroshchuk, Oleg Lavrentovich
-
Publication number: 20090040453Abstract: Methods for treating aligning substrates produces uniform alignment of liquid crystals in at least two modes. The method is based on the treatment of liquid crystal aligning substrates with a collimated or partially collimated plasma beam. In one embodiment, the method comprises a step of bombarding an aligning substrate with at least one plasma beam from a plasma beam source at a designated incident angle to align the atomic/molecular structure or the surface profile of the aligning substrate in at least one aligned direction.Type: ApplicationFiled: September 4, 2008Publication date: February 12, 2009Applicant: Kent State UniversityInventors: Liang-Chy Chien, Andriy Dobrovolskyy, Oleg Yaroshchuk, Oleg Lavrentovich
-
Patent number: 7463228Abstract: A method for fast switching a dual frequency (FIG. 3) liquid crystal cell is disclosed. The liquid crystal cell has opposed substrates (12) with a dual frequency liquid crystal material (18) disposed therebetween. Each substrate has an electrode that is connected to a power supply (20) that is able to apply different voltage magnitudes at different frequencies. And each substrate (12) has an alignment layer that imparts a high pretilt angle to the liquid crystal material, wherein no application of voltage results in the material exhibiting an initial state. A transition driving pulse (104) of a first magnitude is applied to the material at a first frequency to accelerate a transition into a first state from the initial state. A holding pulse (102) of a second magnitude is applied to the material at the first frequency to maintain the first state, wherein the second magnitude is less than the first magnitude.Type: GrantFiled: January 16, 2003Date of Patent: December 9, 2008Assignee: Kent State UniversityInventors: Andrii Golovin, Sergij Shiyanovskii, Oleg Lavrentovich
-
Patent number: 7294370Abstract: An aligned film comprises a dried mixture of a lyotropic chromonic liquid crystal material and a dopant selected from the group consisting of dyes having a molecular weight within one order of magnitude of the liquid crystal material and block co-polymers. An example of an aligned film may be transparent to visible light but not transparent to polarized light in the ultraviolet and/or infra-red portions of the electromagnetic spectrum. A method of making an aligned lyotropic chromonic liquid crystal-based film comprises providing a mixture of a lyotropic chromonic liquid crystal material and a dopant in a solvent for the liquid crystal material, applying the mixture to a substrate, and removing the solvent to produce an aligned lyotropic chromonic liquid crystal-based film.Type: GrantFiled: August 17, 2004Date of Patent: November 13, 2007Assignee: Kent State UniversityInventors: Oleg Lavrentovich, Tod Schneider, Andrii Golovin, Jong-Chan Lee
-
Publication number: 20070139586Abstract: A liquid crystalline optical medium includes polymer stabilized liquid crystal material. The polymer stabilized liquid crystal material includes a short pitch cholesteric liquid crystal material stabilized by a polymer material. The effective phase retardation of the polarization independent liquid crystal optical medium can be controlled by external (for example, electric and magnetic) fields.Type: ApplicationFiled: December 19, 2006Publication date: June 21, 2007Inventors: Mingxia Gu, Liubov Kreminska, Andrii Golovin, Oleg Lavrentovich
-
Publication number: 20070059780Abstract: A system for the detection of ligands comprising at least one receptor and an amplification mechanism coupled to the receptor wherein an amplified signal is produced as a result of receptor binding a ligand. Examples of suitable amplification mechanisms include antibody-embedded liquid crystalline materials; use of alpha-2-macroglobulin to encage an enzyme, whereby the enzyme is separated from its substrate by an receptor; and a receptor engineered to inhibit the active of site of an enzyme only in the absence of a ligand. Also provided are methods for the automatic detection of ligands.Type: ApplicationFiled: April 26, 2002Publication date: March 15, 2007Applicant: Kent State UniversityInventors: Christopher Woolverton, Gary Niehaus, Kathleen Doane, Oleg Lavrentovich, Steven Schmidt, Steven Signs
-
Publication number: 20060209241Abstract: Methods for treating aligning substrates produces uniform alignment of liquid crystals in at least two modes. The method is based on the treatment of liquid crystal aligning substrates with a collimated or partially collimated plasma beam. In one embodiment, the method comprises a step of bombarding an aligning substrate with at least one plasma beam from a plasma beam source at a designated incident angle to align the atomic/molecular structure or the surface profile of the aligning substrate in at least one aligned direction.Type: ApplicationFiled: May 17, 2004Publication date: September 21, 2006Inventors: Liang-Chy Chien, Andriy Dobrovolskyy, Oleg Yaroschuk, Oleg Lavrentovich
-
Publication number: 20040150598Abstract: A method for fast switching a dual frequency (FIG. 3) liquid crystal cell is disclosed. The liquid crystal cell has opposed substrates (12) with a dual frequency liquid crystal material (18) disposed therebetween. Each substrate has an electrode that is connected to a power supply (20) that is able to apply different voltage magnitudes at different frequencies. And each substrate (12) has an alignment layer that imparts a high pretilt angle to the liquid crystal material, wherein no application of voltage results in the material exhibiting an initial state.Type: ApplicationFiled: March 25, 2004Publication date: August 5, 2004Inventors: Andrii Golovin, Sergij Shiyanovskii, Oleg Lavrentovich
-
Patent number: 6171802Abstract: A system for the detection of ligands comprising at least one receptor and an amplification mechanism coupled to the receptor wherein an amplified signal is produced as a result of receptor binding a ligand. Examples of suitable amplification mechanisms include antibody-embedded liquid crystalline materials; use of alpha-2-macroglobulin to encage an enzyme, whereby the enzyme is separated from its substrate by an receptor; and a receptor engineered to inhibit the active of site of an enzyme only in the absence of a ligand. Also provided are methods for the automatic detection of ligands.Type: GrantFiled: June 10, 1998Date of Patent: January 9, 2001Assignee: Kent State UniversityInventors: Christopher J. Woolverton, Gary D. Niehaus, Kathleen J. Doane, Oleg Lavrentovich, Steven P. Schmidt, Steven A. Signs