Patents Assigned to Kent State University
  • Patent number: 10928701
    Abstract: An optical beam deflection device includes a dual-twist Pancharatnam phase device (DTPPD) with first and second Pancharatnam layers each with an in-plane twist and a transverse twist that is at least 60° over the thickness of each Pancharatnam layer, and more preferably at least 75°, and still more preferably at least 90°, with the twist sense of the second Pancharatnam layer being opposite the twist sense of the first Pancharatnam layer. To provide switchable beam deflection, an electro-optic polarization element inputs a circularly polarized light beam to the DTPPD with left-handed circular polarization or right-handed circular polarization controlled by an electrical input.
    Type: Grant
    Filed: February 22, 2017
    Date of Patent: February 23, 2021
    Assignee: Kent State University
    Inventors: Hsien-Hui Cheng, Philip Bos, Achintya Bhowmik
  • Publication number: 20210011353
    Abstract: Optical phase control elements are based on the Pancharatnam phase. Tunable liquid crystal devices containing the optical phase control elements may include a liquid crystal cell between a pair of substrates, a first plurality of electrodes, and a second plurality of electrodes. Each individual phase control element is defined by one electrode from the first plurality and one electrode from the second plurality.
    Type: Application
    Filed: July 9, 2020
    Publication date: January 14, 2021
    Applicants: Kent State University, Government of the United States as Represented by the Secretary of the Air Force
    Inventors: Comrun Yousefzadeh, Philip Bos, Andre Van Rynbach
  • Patent number: 10886503
    Abstract: Novel microlens array architectures for enhanced light outcoupling from light emission are provided. Organic light emitting devices (OLEDs) that include an outcoupling layer including these novel microlens array architectures and method for fabricating such OLEDs are provided. These devices may be used to provide OLEDs with optimized light extraction.
    Type: Grant
    Filed: October 16, 2019
    Date of Patent: January 5, 2021
    Assignees: Universal Display Corporation, Kent State University
    Inventors: Yue Cui, Deng-ke Yang, Ruiqing Ma, Gregory McGraw, Julia J. Brown
  • Patent number: 10871694
    Abstract: A bistable cholesteric liquid crystal switchable window has two stable states in the absence of an applied voltage. A first stable state is a planar state which is transparent or reflective for visible light. A second stable state is a focal conic state which is opaque for visible light. The window can be switched from the first stable state to the second stable state via a first voltage pulse and from the second stable state to the first stable state via a second voltage pulse. The first voltage pulse and the second voltage pulse may have the same frequency.
    Type: Grant
    Filed: September 11, 2017
    Date of Patent: December 22, 2020
    Assignee: Kent State University
    Inventors: Deng-Ke Yang, Meina Yu
  • Patent number: 10838185
    Abstract: The invention relates to systems and methods for observing materials, such as living cells or organisms, wherein the systems and methods utilize a microscopy system having an illumination source and an objective lens. A specimen including a predetermined amount of a liquid medium and a predetermined amount of an extracellular strongly absorbing dye is positioned for observation using the microscopy system. The illumination of the specimen correlates to the spectral region around the peak of the dye absorbance for the dye used in the system, such that live cells and organisms appear in contrast over a dark background for observation.
    Type: Grant
    Filed: June 20, 2017
    Date of Patent: November 17, 2020
    Assignee: KENT STATE UNIVERSITY
    Inventors: Michael Model, Anatoly Khitrin
  • Patent number: 10803121
    Abstract: Systems and methods for generating real-time, personalized recommendations are disclosed. In one embodiment, a method operates upon an electronic data collection organized as a network of vertices and edge connections between the vertices. The method provides the recommendations includes iteratively traversing across edges that satisfy search criteria to a new set of vertices and filtering each new set of vertices to satisfy the search criteria. At the conclusion of the traversing and filtering, a final set of vertices represents the recommended entities. In some embodiments, a control vector describes a sequence of relationships between a requester and the items to be recommended. The method can assign scores to candidate recommendations and select the recommendations having the highest scores. Advantageously, the method provides flexibility and rapid execution of recommendation queries without the need to precompute intermediate results.
    Type: Grant
    Filed: May 28, 2016
    Date of Patent: October 13, 2020
    Assignees: GraphSQL, Inc., Kent State University
    Inventors: Ruoming Jin, Adam Anthony, Ming Lin, Nicholas Tietz
  • Patent number: 10788713
    Abstract: Ink-jet printable compositions including nanoparticles capped with a protective layer of hydrocarbon chains and a single solvent exhibiting a single evaporation rate and having a specifically defined viscosity and surface tension that result in uniform and printable alignment layers for liquid crystal materials. Patterned liquid crystal-containing cells are also disclosed including one or more layers including the same or different nanoparticles capped with a protective layer of hydrocarbon chains printed on a surface of a substrate or even another nanoparticle-containing layer. Methods for producing the cells are also disclosed, including the step of printing a pattern on one or more portions of a cell surface utilizing a composition comprising the capped nanoparticles. Devices including the cells are also disclosed.
    Type: Grant
    Filed: November 13, 2018
    Date of Patent: September 29, 2020
    Assignee: KENT STATE UNIVERSITY
    Inventors: Torsten Hegmann, Anshul Sharma, Dmytro Reznikov
  • Publication number: 20200278283
    Abstract: An apparatus for measuring normal and shear stress at a surface. The apparatus includes a substrate; and a plurality of sensing units on the substrate. Each sensing unit includes a mechanical transducer having a receiving surface and a sensing surface; and a plurality of normal force sensors between the sensing surface and the substrate.
    Type: Application
    Filed: September 25, 2018
    Publication date: September 3, 2020
    Applicant: Kent State University
    Inventors: Mykhailo Pevnyi, Tianyi Guo, Fred Minkowski, Vincent Hetherington, Hiroshi Yokoyama, Peter Palffy-Muhoray
  • Publication number: 20200233270
    Abstract: A photoalignment method includes photoaligning a first liquid crystal cell and using the photoaligned first liquid crystal cell as a mask in the photoalignment of a second liquid crystal cell. The method may increase spatial dynamic range or decrease pitch.
    Type: Application
    Filed: September 25, 2018
    Publication date: July 23, 2020
    Applicant: Kent State University
    Inventors: Hiroshi Yokoyama, Mengfei Wang
  • Patent number: 10709815
    Abstract: Star block copolymers having 3 to 8 arms are formed as a 3D foam scaffold having tailor-made pore sizes that mimic an actual cell size of a specific animal and/or human tissue and/or organs. The pore sizes are made within the elastomeric foams via a salt leaching process wherein a salt of a specific particle size is blended within the star block copolymers and crosslinked as by polyisocyanate compounds. Water or other suitable solvent are utilized to dissolve and leach out the salt leaving an open pore system. Animal and/or human cells are then injected into the 3D elastomeric foam scaffold that contains pendant liquid crystals on the star block copolymer whereby with the aid of nutrients, cells are formed within the pore system that are viable for at least three months. The size of the pore is predetermined to produce a desired cultured cell having a desired size.
    Type: Grant
    Filed: November 1, 2017
    Date of Patent: July 14, 2020
    Assignee: Kent State University
    Inventors: Elda Hegmann, Marianne E. Prévôt, Torsten Hegmann
  • Patent number: 10705368
    Abstract: A display panel and a manufacturing method thereof are provided. Each pixel of the display panel includes a transmission region and a reflection region, and the display panel includes a first polarizer, a first base substrate, a first alignment layer, a liquid crystal layer, a second alignment layer, a second base substrate, and a second polarizer. A reflection layer is provided between the second alignment layer and the second polarizer in the reflection region. The liquid crystal layer in the reflection region includes nematic liquid crystal and a polymer network. The liquid crystal layer in the transmission region includes a liquid crystal mixture including the nematic liquid crystal and polymerizable monomers. The polymer network in reflection region is formed by polymerizing the polymerizable monomers in the liquid crystal mixture.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: July 7, 2020
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., KENT STATE UNIVERSITY
    Inventors: Guangkui Qin, Dengke Yang, Xiaochen Zhou
  • Patent number: 10690685
    Abstract: A biosensing platform capable of high throughput mechanochemical biosensing comprising a DNA origami nanostructure having a plurality of slots into which recognition elements are strategically placed and apparatus that senses a change in the origami nanostructure in response to the introduction of a target where the apparatus includes a signal transduction unit and signal sensor which exploits mechanical signals in a recognition element which signal includes one or more mechanical tension or mechanochemical rearrangement event. The nanostructure is preferably a 2-dimensional or 3-dimensional arrangement of tiles linked by locking elements, such as aptamers that will open in response to an event such as exposure to a drug molecule, DNA, RNA or protein target.
    Type: Grant
    Filed: June 5, 2015
    Date of Patent: June 23, 2020
    Assignee: KENT STATE UNIVERSITY
    Inventors: Hanbin Mao, Deepak P. Koirala, Hiroshi Sugiyama, Masayuki Endo
  • Publication number: 20200174323
    Abstract: A method for producing a photostable reactive mesogen alignment layer includes infusing an anisotropic dye into a microcavity so as to coat the an surface of the microcavity with the anisotropic dye; illuminating the anisotropic dye with polarized light so as to form an anisotropic dye layer aligned with respect to the inner surface of the microcavity; infusing a reactive mesogen and the liquid crystal material into the microcavity; illuminating the reactive mesogen at a wavelength selected to cause polymerization of the layer of the reactive mesogen so as to form a polymerized reactive mesogen layer; aligning the liquid crystal material with respect to the anisotropic dye layer; and bleaching the anisotropic dye layer.
    Type: Application
    Filed: May 21, 2018
    Publication date: June 4, 2020
    Applicants: Kent State University, Massachusetts Institute of Technology
    Inventors: Colin McGinty, Philip J. Bos, Valerie A. Finnemeyer, Robert K. Reich, Harry R. Clark, Shaun R. Berry
  • Patent number: 10660571
    Abstract: A thermochromic fabric utilizing cholesteric liquid crystals includes a fabric material or garment formed therefrom. The liquid crystal material is patterned with a plurality of different liquid crystal formulations, whereby each formulation has high thermal sensitivity over a narrow temperature range. As a result, the aggregate pattern of liquid crystal material formed on the thermochromic fabric allows the thermochromic fabric to have high thermal sensitivity over a broad temperature range. As such, the fabric or garment may be worn on specific body parts of a patient, such as his or her feet, to assist in making a medical diagnosis.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: May 26, 2020
    Assignee: KENT STATE UNIVERSITY
    Inventors: John L. West, Yijing Chen, Peter Palffy-Muhoray, Lawrence Osher, Vincent J. Hetherington, Jill S. Kawalec
  • Patent number: 10634881
    Abstract: An optical magnification system comprises two Pancharatnam lenses, and provides a first magnification for left-hand circularly polarized light and a second magnification different from the first magnification for right-hand circularly polarized light. An optical magnification system comprises two lenses, each having different focal lengths for left-handed and right-handed circularly polarized light, respectively, and configured to provide a first magnification for left-handed circularly polarized light and a second magnification different from the first magnification for right-handed circularly polarized light.
    Type: Grant
    Filed: March 25, 2016
    Date of Patent: April 28, 2020
    Assignee: Kent State University
    Inventors: Kun Gao, Hsien-Hui Cheng, Philip Bos, Colin P. McGinty, Achintya Bhowmik
  • Publication number: 20200060736
    Abstract: The present invention provides a method of placing a plate fixation device in a foot comprising the steps of: plantarly placing a reverse locking plate on the foot; and utilizing a locking guide to dorsally place reverse locking screws into the foot to mate with the reverse locking plate.
    Type: Application
    Filed: August 21, 2019
    Publication date: February 27, 2020
    Applicant: Kent State University
    Inventors: James Connors, Craig Verdin, Allan M. Boike, Nilin Rao
  • Patent number: 10568986
    Abstract: A polymeric scaffold contains pendant liquid crystal side chains and has fully interconnected pores. Such a polymeric scaffold will preferably be 3D in nature and elastomeric, biocompatible and biodegradable. Such 3D liquid crystal elastomer (LCE) scaffolds can be used for various biomedical applications, including cell culture applications. A method for the production of such a polymeric scaffold containing liquid crystals and having interconnected pores is also disclosed that uses a metal foam sacrificial template as a scaffold to produce the polymeric smart response scaffold of the present invention. Consistent and controlled pore sizes result from etching the sacrificial metal foam template away from the polymeric scaffold, permitting the incorporation of growth factors, when needed, for enhancing cell viability and proliferation.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: February 25, 2020
    Assignee: KENT STATE UNIVERSITY
    Inventors: Elda Hegmann, Torsten Hegmann, Yunxiang Gao
  • Patent number: 10563012
    Abstract: Controlled biodegradable smart responsive scaffold (SRS) materials enhance attachment and viability of cells, i.e. actively guiding their expansion, proliferation and in some cases differentiation, while increasing their biomechanical functionality is an important key issue for tissue regeneration. Chemically build-in functionality in these biodegradable SRS materials is achieved by varying structural functionalization with biocompatible liquid crystal motifs and general polymer composition allowing for regulation and alteration of tensile strength, surface ordering, bioadhesion and biodegradability, bulk liquid crystal phase behavior, porosity, and cell response to external stimuli. Liquid crystal modification of such polymeric scaffolds is an ideal tool to induce macroscopic ordering events through external stimuli.
    Type: Grant
    Filed: November 7, 2017
    Date of Patent: February 18, 2020
    Assignee: KENT STATE UNIVERSITY
    Inventors: Elda Hegmann, Torsten Hegmann, Anshul Sharma, Abdollah Neshat
  • Patent number: 10563247
    Abstract: A single-molecule mechanoanalytical real-time sensing device (SMART) comprising a molecular trawl and a DNA stem-loop structure that serves as a molecular dipstick, said trawl and said DNA stem-loop structure anchored by handles to two optically-trapped bead templates; said molecular trawl comprising multiple analyte recognition elements that exist in each of two separate DNA (pair) strands that act as two pincers, said pincers each having a nucleobase capable of catching an analyte in a media; said DNA stem-loop structure comprising a plurality of nucleotides in said loop and multiple base pairs in said stem; and wherein said DNA stem-loop is located generally opposite to said molecular trawl that is capable of reporting an amount of bound analyte target via mechanochemical transient events.
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: February 18, 2020
    Assignee: KENT STATE UNIVERSITY
    Inventors: Hanbin Mao, Shankar Mandal
  • Patent number: 10545383
    Abstract: Ink-jet printable compositions including nanoparticles capped with a protective layer of hydrocarbon chains and a single solvent exhibiting a single evaporation rate and having a specifically defined viscosity and surface tension that result in uniform and printable alignment layers for liquid crystal materials. Patterned liquid crystal-containing cells are also disclosed including one or more layers including the same or different nanoparticles capped with a protective layer of hydrocarbon chains printed on a surface of a substrate or even another nanoparticle-containing layer. Methods for producing the cells are also disclosed, including the step of printing a pattern on one or more portions of a cell surface utilizing a composition comprising the capped nanoparticles. Devices including the cells are also disclosed.
    Type: Grant
    Filed: November 13, 2018
    Date of Patent: January 28, 2020
    Assignee: KENT STATE UNIVERSITY
    Inventors: Torsten Hegmann, Anshul Sharma, Dmytro Reznikov