Patents by Inventor Keun-Chan Oh

Keun-Chan Oh 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).

  • Patent number: 10007132
    Abstract: Provided are a display panel and a thin film transistor array substrate. According to one or more exemplary embodiments, a display panel includes: a first substrate including a pixel area and a non-pixel area; a second substrate that faces the first substrate; and a crack guide groove disposed on a surface of at least one of the first substrate and the second substrate.
    Type: Grant
    Filed: April 30, 2015
    Date of Patent: June 26, 2018
    Assignee: Samsung Display Co., Ltd.
    Inventors: Won Gap Yoon, Ji Eun Jang, Kyung Seon Tak, Keun Chan Oh
  • 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: 9988576
    Abstract: A liquid crystal display device comprises a display panel including a first base substrate, a switching element disposed on the first base substrate, a color filter layer disposed on the switching element, and a pixel electrode disposed on the color filter layer; a counter display panel including a second base substrate and a common electrode disposed on the second base substrate and facing the display panel; a liquid crystal layer disposed between the display panel and the counter display panel and having negative dielectric anisotropy, wherein the liquid crystal layer includes at least one compound represented by Formula 1 below, and the liquid crystal layer does not include a compound represented by Formula A below; and a light-blocking spacer disposed on the display panel and including an area overlapping the switching element, and maintaining the thickness of the liquid crystal layer.
    Type: Grant
    Filed: June 20, 2016
    Date of Patent: June 5, 2018
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Soon Joon Rho, Joon Hyung Park, Jong Ho Son, Beom Soo Shin, Kang Seob Jeong, Si Heun Kim, Kyung Hae Park, Keun Chan Oh, Hye Lim Jang
  • Publication number: 20180136522
    Abstract: A liquid crystal display (LCD) device and method of manufacturing the same are provided. The LCD comprises, a first substrate, a second substrate facing the first substrate, a liquid crystal layer interposed between the first substrate and the second substrate and includes liquid crystal molecules, an alignment film disposed between the liquid crystal layer and the first substrate, a pixel electrode disposed between the alignment film and the first substrate, a photo-curable layer between the liquid crystal layer and the alignment films, a common electrode disposed between the liquid crystal layer and the second substrate, and a vertical alignment inducing layer between the common electrode and the liquid crystal layer. The vertical alignment inducing layer includes a self-aligned vertical alignment inducer, and the vertical alignment inducer includes a hydrophilic group, and an affinity liquid crystal group having high affinity with the liquid crystal molecules.
    Type: Application
    Filed: January 15, 2018
    Publication date: May 17, 2018
    Inventor: Keun Chan Oh
  • 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: 20180088403
    Abstract: A display device includes a base portion including a pixel area including a light-transmitting area and a light-blocking area; a projection portion disposed on the light-blocking area of the base portion and including a first sub-color filter and a second sub-color filter overlapping over an overlap area; a light-blocking member disposed on the projection portion and overlapping the base portion; and a spacing member disposed on the light-blocking member, made of the same material as the light-blocking member and overlapping the projection portion.
    Type: Application
    Filed: June 30, 2017
    Publication date: March 29, 2018
    Inventors: Sun Kyu JOO, Su Jeong KIM, Jang Wi RYU, Yi Seop SHIM, Keun Chan OH, Jae Jin LYU, Jun Woo LEE, Chang Soon JANG, Young Bong CHO, Chul HUH
  • 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: 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
  • Patent number: 9910318
    Abstract: A liquid crystal display (LCD) device and method of manufacturing the same are provided. The LCD comprises, a first substrate, a second substrate facing the first substrate, a liquid crystal layer interposed between the first substrate and the second substrate and includes liquid crystal molecules, an alignment film disposed between the liquid crystal layer and the first substrate, a pixel electrode disposed between the alignment film and the first substrate, a photo-curable layer between the liquid crystal layer and the alignment films, a common electrode disposed between the liquid crystal layer and the second substrate, and a vertical alignment inducing layer between the common electrode and the liquid crystal layer. The vertical alignment inducing layer includes a self-aligned vertical alignment inducer, and the vertical alignment inducer includes a hydrophilic group, and an affinity liquid crystal group having high affinity with the liquid crystal molecules.
    Type: Grant
    Filed: January 20, 2016
    Date of Patent: March 6, 2018
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventor: Keun Chan Oh
  • Patent number: 9896427
    Abstract: A liquid crystal composition including at least one of the liquid crystal molecules represented by Chemical Formulas 1 to 3:
    Type: Grant
    Filed: February 19, 2016
    Date of Patent: February 20, 2018
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Ji Hong Bae, Keun Chan Oh
  • 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
  • Patent number: 9885915
    Abstract: A liquid crystal display includes a first substrate including a thin-film transistor (“TFT”) disposed in a unit pixel, a first electrode connected to the TFT, and a second electrode disposed on the same layer as that on which the first electrode is disposed, a second substrate facing the first substrate, and a liquid crystal layer between the first and second substrates, where the first and second electrodes include a first wiring electrode and a second wiring electrode, respectively disposed on sides of the unit pixel, first main electrodes and second main electrodes, respectively branched off from at least one of the first wiring electrode and the second wiring electrode in a first direction and are arranged in a staggered manner, and first slit electrodes and second slit electrodes, respectively, which are arranged in a second direction perpendicular to the first direction and are arranged in a staggered manner.
    Type: Grant
    Filed: November 3, 2016
    Date of Patent: February 6, 2018
    Assignee: SAMSUNG DISPLAY CO. LTD.
    Inventors: Fusayuki Takeshita, Jae Jin Lyu, Keun Chan Oh, Jin Hyeong Lee
  • Publication number: 20180010045
    Abstract: A liquid crystal composition includes at least one of liquid crystal molecules represented by Chemical Formulas A and B: where in Chemical Formulas A and B, L1 to L4 are each independently —H, —F, —Cl, —OCF3, —CF3, —CH2F, or —CHF2, R1 to R4 are each independently hydrogen, a halogen, a cyano group, a C1-C12 alkyl group, or a C1-C12 alkoxy group, and Z1 to Z4 are each independently a single bond, —O—, —COO—, —OCO—, —CF2O—, —OCF2—, —CH2O—, —OCH2—, —SCH2—, —CH2S—, —CH2CH2—, —C2F4—, —CH2CF2—, —CF2CH2—, —CH2n—, where n is a natural number of 1 to 12, —CH?CH—, —CF?CF—, —CH?CF—, —CF?CH—, —C?C—, or —CH?CHCH2O.
    Type: Application
    Filed: March 13, 2017
    Publication date: January 11, 2018
    Inventors: Ji Hong BAE, Sung-Hwan HONG, Keun Chan OH
  • Patent number: 9862886
    Abstract: An exemplary embodiment of the present invention provides a compound represented by Chemical Formula 1: wherein, in Chemical Formula 1, n is 0, 1, or 2, and a substituent represented by X is F, Cl, CF3, CF2CF3 CHF2, CH2F, OCF3, CN, NCS, or a C1 to C5 alkyl including 1 to 3 fluoro substituents and a CH2 group independently substituted with one or more oxygen atoms; (R1) is hydrogen or a C1 to C15 alkyl, at least one CH2 group being independently replaced with —C?C—, —CF2O—, —CH?CH—, —O—, —CO—O—, —O—CO—, or —O—CO—O— in a way that oxygen atoms are directly connected to each other, and 1 to 3 hydrogen atoms of the C1 to C15 alkyl being replaced with halogen; (F) indicates that a fluoro is optionally substituted in place of a hydrogen, and each of is independently
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: January 9, 2018
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hye Lim Jang, Beom-Soo Shin, Si Heun Kim, Keun Chan Oh, Bong Hee Kim, Sun Hee Lee
  • Publication number: 20170292074
    Abstract: A liquid crystal composition, comprising, at least one compound represented by Formula 1-A: wherein, in the Formula 1-A, R—*, R1—*, Q—*, *—Z1-*, *—Z2-*, n1, n2, n3, n4, L1-*, L2-*, L3-*, L4-*, L5-*, L6-*, L7-*, and L8-* are the same as defined in the specification, and * is defined as a bonding site to a neighboring atom.
    Type: Application
    Filed: January 6, 2017
    Publication date: October 12, 2017
    Inventors: Ji Hong BAE, Keun Chan OH, Seul Gee LEE
  • Patent number: 9783735
    Abstract: A liquid crystal display device comprises a first substrate, a second substrate which faces the first substrate, an electrode part which is provided on at least one of the first substrate and the second substrate, and a liquid crystal layer which comprises a liquid crystal composition and is provided between the first substrate and the second substrate. The liquid crystal composition includes a liquid crystal compound of Formula 1. wherein R1, R2, A11, A12, A13, A21, A22, Z11, Z12, Z13, Z21, Z22, a, b, c, d, and e are as described herein.
    Type: Grant
    Filed: March 3, 2016
    Date of Patent: October 10, 2017
    Assignees: SAMSUNG DISPLAY CO., LTD., DONGJIN SEMICHEM CO., LTD.
    Inventors: Si Heun Kim, Beom Soo Shin, Keun Chan Oh, Bong Hee Kim, Young Ho Seo
  • Publication number: 20170260452
    Abstract: A liquid crystal display including a first substrate, a second substrate overlapping with the first substrate, and a liquid crystal layer provided between the first substrate and the second substrate, wherein the liquid crystal layer includes a liquid crystal compound represented by Formula 1 and a liquid crystal stabilizing agent: wherein A, B, n1, n2, R, R?, Z1, and Z2 are the same as described in the specification.
    Type: Application
    Filed: October 18, 2016
    Publication date: September 14, 2017
    Inventors: Sun Young KWON, Ji Hong BAE, Keun Chan OH, Seul Gee LEE, Jin Hyeong LEE
  • Patent number: 9723769
    Abstract: An alignment film includes a first pre-tilt functional group, a second pre-tilt functional group and a first vertical alignment functional group, which are linked to polysiloxane on a substrate. The first vertical alignment functional group includes a cyclic compound and is aligned substantially perpendicularly to the substrate. The first pre-tilt functional group is cross-linked to the second pre-tilt functional group and tilted with respect to the substrate.
    Type: Grant
    Filed: February 20, 2015
    Date of Patent: August 1, 2017
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Taek-Joon Lee, Keun-Chan Oh, Jun-Hyup Lee, Sang-Gyun Kim, Jang-Hyun Kim, Tae-Hoon Kim
  • Publication number: 20170204330
    Abstract: A liquid crystal composition includes: at least one of compounds represented by Formula 1: in the Formula 1, R—* and R?—* are each independently any one of *—H, *—F, *—Cl, *—I, *—Br, a C1-12 alkyl group, a C1-12 alkoxy group, and a cyano group; *—Z1—* and *—Z2—* are each independently any one of *—COO—*, *—OCO—*, *—CF2O—*, *—OCF2—*, *—CH2O—*, *—OCH2—* *—SCH2—*, *—CH2S—*, *—C2F4—*, *—CH2CF2—*, *—CF2CH2—*, *—(CH2)m—*, *—CH?CH—*, *—CF?CF—*, *—CH?CF—*, *—CF?CH—*, *—C?C—*, *—CH?CHCH2O—*, or a single bond; and are each independently any one of n1 and n2 are each independently 0 to 3; m is 2 to 5; and L1-*, L2-*, L3-*, L4-*, L5-*, L6-*, L7-*, and L8-* are each independently any one of *—H, *—F, *—Cl, *—OCF3, *—CF3, *—CH2F, or *—CHF2, where “*” indicates a point of attachment.
    Type: Application
    Filed: July 21, 2016
    Publication date: July 20, 2017
    Inventors: Seul Gee LEE, Ji Hong BAE, Keun Chan OH
  • Publication number: 20170174990
    Abstract: A liquid crystal display device comprises a display panel including a first base substrate, a switching element disposed on the first base substrate, a color filter layer disposed on the switching element, and a pixel electrode disposed on the color filter layer; a counter display panel including a second base substrate and a common electrode disposed on the second base substrate and facing the display panel; a liquid crystal layer disposed between the display panel and the counter display panel and having negative dielectric anisotropy, wherein the liquid crystal layer includes at least one compound represented by Formula 1 below, and the liquid crystal layer does not include a compound represented by Formula A below; and a light-blocking spacer disposed on the display panel and including an area overlapping the switching element, and maintaining the thickness of the liquid crystal layer.
    Type: Application
    Filed: June 20, 2016
    Publication date: June 22, 2017
    Inventors: Soon Joon RHO, Joon Hyung PARK, Jong Ho SON, Beom Soo SHIN, Kang Seob JEONG, Si Heun KIM, Kyung Hae PARK, Keun Chan OH, Hye Lim JANG