Patents by Inventor Chang-Hun Lee

Chang-Hun Lee 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: 20190119572
    Abstract: Disclosed is a liquid crystal composition including at least one compound selected from the group consisting of a liquid crystal compound expressed by Formula 1-1 and a liquid crystal compound expressed by Formula 1-2; at least one compound selected from the group consisting of a self-alignment compound expressed by Formula 2-1 and a self-alignment compound expressed by Formula 2-2; and at least one compound selected from the group consisting of a reactive mesogen expressed by Formula 3-1, a reactive mesogen expressed by Formula 3-2, a reactive mesogen expressed by Formula 3-3, a reactive mesogen expressed by Formula 3-4, and a reactive mesogen expressed by Formula 3-5. The liquid crystal composition also has negative dielectric anisotropy.
    Type: Application
    Filed: October 22, 2018
    Publication date: April 25, 2019
    Inventors: Sun Young Kwon, Min-Hee Kim, Ji Eun Jang, Il Joon Kang, Jong Ho Son, Keun Chan Oh, Chang-Hun Lee
  • Publication number: 20190117696
    Abstract: Provided herein are compositions and methods for healing cartilage tissue defects or injury by forming fibrochondrocyte cells or fibrochondrocyte-like cells from recruited progenitor cells, such as mesenchymal stem cells.
    Type: Application
    Filed: March 13, 2016
    Publication date: April 25, 2019
    Applicant: The Trustees of Columbia University in the City of New York
    Inventors: Jeremy J. Mao, Chang Hun Lee
  • Publication number: 20190085242
    Abstract: A liquid crystal composition includes: at least one liquid crystal compound selected from the group consisting of Chemical Formulas 1-1 to 1-8; at least one self-aligned compound selected from the group consisting of Chemical Formulas 2-1 and 2-2; and at least one reactive mesogen selected from the group consisting of Chemical Formulas 3-1 to 3-5. Compositions and devices constructed therewith are capable of ameliorating liquid crystal drip spots that typically occur in a manufacturing process. In addition, the display devices using the composition do not require an additional alignment layer, which simplifies manufacturing.
    Type: Application
    Filed: August 23, 2018
    Publication date: March 21, 2019
    Inventors: Ji Eun JANG, Sun Young KWON, Min-Hee KIM, Jong Ho SON, Keun Chan OH, Chang-Hun LEE
  • Publication number: 20190015386
    Abstract: Provided herein are compositions including oxotremorine (e.g., oxotremorine methiodide or Oxo-M) and 4-PPBP (e.g., 4-PPBP maleate). Also provided are methods of treating a connective tissue defect in a subject with oxotremorine and 4-PPBP. In addition, provided are scaffolds and methods of making same that include multiple fibers that include Oxo-M, 4-PPBP, and optionally icariin or kartogenin.
    Type: Application
    Filed: September 17, 2018
    Publication date: January 17, 2019
    Applicant: The Trustees of Columbia University in the City of New York
    Inventors: Chang Hun Lee, Solaiman Tarafder, Esther Chen
  • Patent number: 10126599
    Abstract: A liquid crystal device that includes two substrates that face each other, a liquid crystal cell interposed between the two substrates, and a liquid crystal alignment layer interposed between the liquid crystal cell and at least one of the two substrates, the liquid crystal alignment layer includes a plurality of spherical or spherical-like core particles having a diameter of 10 nm to 1 ?m.
    Type: Grant
    Filed: March 18, 2015
    Date of Patent: November 13, 2018
    Assignees: Samsung Display Co., Ltd., INDUSTRIAL COOPERATION FOUNDATION CHONBUK NATIONAL UNIVERSITY
    Inventors: Shin Woong Kang, Kwang Un Jeong, Byung Wook Ahn, Keun Chan Oh, Chang Hun Lee
  • Patent number: 10119074
    Abstract: A liquid crystal composition includes a compound having a structure represented by formula A-1: wherein RA1 is an alkyl group, an alkoxy group, a cyano group, a halogen atom, or a hydrogen atom, RA2 is an alkyl group, a cyano group, a halogen atom, or a hydrogen atom, ZA is *—O—*, *—COO—*, *—OCO—*, *—CF2O—*, *—OCF2—*, *—CH2O—*, *—OCH2—*, *—SCH2—*, *—CH2S—*, *—C2F4—*, *—CH2CF2—*, *—CF2CH2—*, *—(CH2)k—*, *—CH?CH—*, *—CF?CF—*, *—CH?CF—*, *—CF?CH—*, *—C?C—*, *—CH?CHCH2O—*, or a single bond, X is a halogen atom, each of l1 and l2 is independently an integer of 0 to 2, and when l1 is 2 and ZA in a repeating unit defined by l1 are the same or different, wherein k is an integer of 1 to 5 and “*” indicates a point of attachment.
    Type: Grant
    Filed: February 1, 2017
    Date of Patent: November 6, 2018
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Ji Eun Jang, Sun Young Kwon, Tae Hoon Kim, Jong Ho Son, Keun Chan Oh, Won Gap Yoon, Gak Seok Lee, Jin Hyeong Lee, Chang Hun Lee
  • Publication number: 20180259845
    Abstract: Disclosed are a pellicle for an extreme ultraviolet (EUV) lithography, which is excellent in transmittance of EUV exposure light and mechanical strength, and a method of fabricating the same. The pellicle includes a support layer pattern; a buried oxide layer pattern formed on the support layer pattern; and a pellicle layer provided being supported by the buried oxide layer pattern. The pellicle may further include a reinforcement layer for reinforcing the mechanical strength of the pellicle layer, an auxiliary layer for additionally supplementing the mechanical strength of the reinforcement layer, and a heat dissipation layer for dissipating heat of the pellicle layer.
    Type: Application
    Filed: March 8, 2018
    Publication date: September 13, 2018
    Inventors: Kee-Soo NAM, Chang-Hun LEE, Ju-Hee HONG, Chul-Kyun PARK
  • Patent number: 10073301
    Abstract: A liquid crystal display includes a first substrate, a gate line on the first substrate, a thin film transistor on the first substrate and connected to the gate line, a first electrode and a second electrode on the first substrate, an insulating layer between the first electrode and the second electrode, a second substrate facing the first substrate, and a liquid crystal layer between the first substrate and the second substrate and including a liquid crystal molecule. One of the first electrode and the second electrode includes a plurality of branch electrodes extending in an extension direction parallel to the gate line, and the other one of the first electrode and the second electrode has a planar shape. The liquid crystal molecule of the liquid crystal layer has negative dielectric anisotropy.
    Type: Grant
    Filed: July 31, 2015
    Date of Patent: September 11, 2018
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Bong Sung Seo, Chang-Hun Lee, Baek Kyun Jeon
  • Publication number: 20180208850
    Abstract: An LCD panel, comprises substrates facing each other, a liquid crystal layer disposed between the substrates and liquid crystal alignment layers, each sandwiched between the liquid crystal layer and a respective one of the substrates, wherein the liquid crystal alignment layers comprises hydrocarbon derivative having perfluorocarbon group.
    Type: Application
    Filed: March 20, 2018
    Publication date: July 26, 2018
    Inventors: Shin Woong KANG, Kundu SUDARSHAN, Byung Wook AHN, Keun Chan OH, Chang Hun LEE, Soon Joon RHO, Jae Jin LYU
  • Publication number: 20180171230
    Abstract: A liquid crystal display includes a first base substrate, a second base substrate facing the first base substrate, and an electrode unit disposed on at least one of the first base substrate and the second base substrate. A liquid crystal layer is positioned between the first base substrate and the second base substrate and includes a liquid crystal composition. The liquid crystal composition includes at least one of a liquid crystal compound represented by Chemical Formula 1, at least one of a liquid crystal compound represented by Chemical Formula 2-A, and at least one of a liquid crystal compound represented by Chemical Formula 2-B.
    Type: Application
    Filed: July 12, 2017
    Publication date: June 21, 2018
    Inventors: SUN YOUNG KWON, JI EUN JANG, JONG HO SON, KEUN CHAN OH, CHANG HUN LEE
  • Patent number: 9944856
    Abstract: An LCD panel, comprises substrates facing each other, a liquid crystal layer disposed between the substrates and liquid crystal alignment layers, each sandwiched between the liquid crystal layer and a respective one of the substrates, wherein the liquid crystal alignment layers comprises hydrocarbon derivative having perfluorocarbon group.
    Type: Grant
    Filed: June 19, 2015
    Date of Patent: April 17, 2018
    Assignees: Samsung Display Co., LTD., INDUSTRIAL COOPERATION FOUNDATION CHONBUK NATIONAL UNIVERSITY
    Inventors: Shin Woong Kang, Kundu Sudarshan, Byung Wook Ahn, Keun Chan Oh, Chang Hun Lee, Soon Joon Rho, Jae Jin Lyu
  • Publication number: 20180085493
    Abstract: Provided herein is a 3D printing system and related compositions, and method of using such, that can produce a polymeric microfiber having embedded microspheres encapsulating an active agent with micron precision and high spatial and temporal resolution. One aspect of the present disclosure provides a method of forming a biocompatible scaffold. Another aspect provides a method of forming a polymeric fiber having a microencapsulated agent distributed in the polymeric fiber. Another aspect provides a composition including a polymeric microfiber produced by 3D printing.
    Type: Application
    Filed: April 7, 2016
    Publication date: March 29, 2018
    Applicant: The Trustees of Columbia University in the City of New York
    Inventor: Chang Hun Lee
  • Publication number: 20180086981
    Abstract: A liquid crystal composition includes a compound having a structure represented by formula A-1: wherein RA1 is an alkyl group, an alkoxy group, a cyano group, a halogen atom, or a hydrogen atom, RA2 is an alkyl group, a cyano group, a halogen atom, or a hydrogen atom, ZA is *—O—*, *—COO—*, *—OCO—*, *—CF2O—*, *—OCF2—*, *—CH2O—*, *—OCH2—*, *—SCH2—*, *—CH2S—*, *—C2F4—*, *—CH2CF2—*, *—CF2CH2—*, *—(CH2)k—*, *—CH?CH—*, *—CF?CF—*, *—CH?CF—*, *—CF?CH—*, *—C?C—*, *—CH?CHCH2O—*, or a single bond, X is a halogen atom, each of l1 and l2 is independently an integer of 0 to 2, and when l1 is 2 and ZA in a repeating unit defined by l1 are the same or different, wherein k is an integer of 1 to 5 and “*” indicates a point of attachment.
    Type: Application
    Filed: February 1, 2017
    Publication date: March 29, 2018
    Inventors: Ji Eun JANG, Sun Young KWON, Tae Hoon KIM, Jong Ho SON, Keun Chan OH, Won Gap YOON, Gak Seok LEE, Jin Hyeong LEE, Chang Hun LEE
  • Publication number: 20180072950
    Abstract: A liquid crystal composition and a display device having the liquid crystal composition. The liquid crystal composition including at least one compound selected from the group consisting of Chemical Formula 1, Chemical Formula 2, Chemical Formula 3, and Chemical Formula 4. Chemical Formulas 1, 2, 3, and 4 are as follows: R denotes an alkyl group having 1 to 7 carbon atoms, an alkenyl group having 2 to 7 carbon atoms, or an alkoxy group having 1 to 7 carbon atoms, independently, in Chemical Formula 1, Chemical Formula 2, and Chemical Formula 4.
    Type: Application
    Filed: April 25, 2017
    Publication date: March 15, 2018
    Inventors: Tae Ho KIM, Min-Hee KIM, Kyung Ho PARK, So Youn PARK, Mi Hwa LEE, Chang-Hun LEE
  • Publication number: 20180066190
    Abstract: A liquid crystal display (LCD) panel includes a first substrate, a second substrate, and a liquid crystal layer disposed between the first substrate and the second substrate. The liquid crystal layer includes liquid crystals with negative dielectric anisotropy and a hindered amine light stabilizer (HALS).
    Type: Application
    Filed: August 29, 2017
    Publication date: March 8, 2018
    Inventors: SUNG HWAN HONG, MI SUK KIM, TAE HO KIM, KEUN CHAN OH, CHANG HUN LEE
  • Publication number: 20180057741
    Abstract: A liquid crystal display includes a first base substrate, a second base substrate, an electrode part, and a liquid crystal layer. The second base substrate is disposed opposite to the first base substrate. The electrode party is disposed on at least one of the first base substrate and the second base substrate. The liquid crystal layer is disposed between the first base substrate and the second base substrate. The liquid crystal layer includes a liquid crystal composition. The liquid crystal composition includes at least one kind of liquid crystal compounds including a cyclopentadienyl group.
    Type: Application
    Filed: June 1, 2017
    Publication date: March 1, 2018
    Inventors: MIN HEE KIM, So Youn Park, Tae Ho Kim, Mi Hwa Lee, Kyung Ho Park, Chang Hun Lee
  • Publication number: 20180046032
    Abstract: A liquid crystal display including a first substrate, a second substrate disposed opposite the first substrate, and a liquid crystal layer disposed between the first substrate and the second substrate. The liquid crystal layer includes a liquid crystal composition. The liquid crystal composition includes at least one of liquid crystal compounds including a cyclopentadienyl group.
    Type: Application
    Filed: April 14, 2017
    Publication date: February 15, 2018
    Inventors: SUN YOUNG KWON, Tae Hoon Kim, Ji Hong Bae, Jong Ho Son, Keun Chan Oh, Gak Seok Lee, Chang Hun Lee, Ji Eun Jang
  • Publication number: 20170357130
    Abstract: A liquid crystal display device comprises: a first substrate; an organic layer disposed on the first substrate; a pixel electrode disposed on the organic layer; a plurality of slits defined in the pixel electrode and configured to exposed a surface of the organic layer; a liquid crystal alignment film disposed on a surface of the pixel electrode and on the surface of the organic layer exposed by the plurality of slits; and a plurality of liquid crystal molecules disposed on the liquid crystal alignment film, wherein the liquid crystal alignment film includes a first region overlapping the plurality of slits and a second region overlapping the pixel electrode, wherein the second region has a surface energy different from a surface energy of the first region.
    Type: Application
    Filed: April 11, 2017
    Publication date: December 14, 2017
    Inventors: Jong Ho SON, Sun Young KWON, Tae Hoon KIM, Kyung Hae PARK, Joon Hyung PARK, Ji Hong BAE, Gak Seok LEE, Jin Hyeong LEE, Chang Hun LEE, Ji Eun JANG, Hye Lim JANG
  • Patent number: 9810949
    Abstract: An apparatus for manufacturing a display device includes: a stage on which a substrate to be processed is supported, the substrate to be processed including a first alignment layer of the display device; an optical system facing the substrate to be processed which is supported on the stage, the optical system including a light source which irradiates ultraviolet rays to the substrate to be processed; and a mask which is interposed between the light source and the substrate to be processed which includes the first alignment layer of the display device. The mask defines: a transmitting portion thereof through which the ultraviolet rays irradiated from the light source are transmitted to the first alignment layer of the substrate to be processed, and a blocking portion thereof which blocks transmission of the ultraviolet rays irradiated from the light source to the substrate to be processed.
    Type: Grant
    Filed: June 1, 2016
    Date of Patent: November 7, 2017
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Mi Hwa Lee, Min Hee Kim, Soo Jung Youn, Chang Hun Lee, Sung Hwan Hong
  • Patent number: 9773950
    Abstract: The present disclosure relates to a method for manufacturing a semiconductor device structure, comprising the steps of: securing the position of a semiconductor device on a plate; securing the positions of electrodes such that the electrodes face the plate; covering the semiconductor device with an encapsulating material; and separating, from the plate, the semiconductor device covered with the encapsulating material.
    Type: Grant
    Filed: April 5, 2013
    Date of Patent: September 26, 2017
    Assignee: CTLAB CO. LTD.
    Inventors: Chang Tae Kim, Jae Sung Ko, Seok Jung Kim, Chang Hun Lee