Patents by Inventor Hang-Ah Park

Hang-Ah Park 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: 11142697
    Abstract: The present invention relates to a liquid crystal aligning agent composition capable of securing a high imidization rate under relatively mild curing conditions, minimizing side reactions and thus having excellent stability, a method for producing a liquid crystal alignment film using the same, and a liquid crystal alignment film and a liquid crystal display device using the same.
    Type: Grant
    Filed: June 26, 2018
    Date of Patent: October 12, 2021
    Assignee: LG CHEM, LTD.
    Inventors: Jung Ho Jo, Hee Han, Sung Joon Min, Hang Ah Park, Sang Mi Lee, Soon Ho Kwon, Jun Young Yoon, Hyeong Seuk Yun, Seongku Kim
  • Patent number: 11136506
    Abstract: A polymer having excellent liquid crystal alignment and electrical properties and thus is suitable for use as a liquid crystal alignment agent, a liquid crystal alignment agent including the same, a liquid crystal alignment film formed from the liquid crystal alignment agent, and a liquid crystal display device including the liquid crystal alignment film are provided.
    Type: Grant
    Filed: September 20, 2018
    Date of Patent: October 5, 2021
    Assignee: LG CHEM, LTD.
    Inventors: Soon Ho Kwon, Jung Ho Jo, Sung Joon Min, Hang Ah Park, Jun Young Yoon
  • Patent number: 11073728
    Abstract: The present invention provides a liquid crystal alignment film not only having an excellent alignment property and stability, but also having high film strength, and thus exhibiting excellent durability and a high residual image property, a method for preparing the same, and a liquid crystal display device using the same.
    Type: Grant
    Filed: October 18, 2018
    Date of Patent: July 27, 2021
    Assignee: LG CHEM, LTD.
    Inventors: Hyeong Seuk Yun, Jung Ho Jo, Sung Joon Min, Hee Han, Hang Ah Park, Sang Mi Lee, Soon Ho Kwon, Jun Young Yoon
  • Patent number: 11036089
    Abstract: The present invention provides a liquid crystal alignment film not only having an excellent alignment property and stability, but also having high film strength, and thus exhibiting excellent durability and a high residual image property, a method for preparing the same, and a liquid crystal display device using the same.
    Type: Grant
    Filed: October 18, 2018
    Date of Patent: June 15, 2021
    Assignee: LG CHEM, LTD.
    Inventors: Hyeong Seuk Yun, Jung Ho Jo, Sung Joon Min, Hee Han, Hang Ah Park, Sang Mi Lee, Soon Ho Kwon, Jun Young Yoon
  • Publication number: 20210155853
    Abstract: A liquid crystal aligning agent composition for forming a liquid crystal alignment film having improved electrical characteristics and high reliability while exhibiting excellent alignment properties and durability, a method for preparing a liquid crystal alignment film using the same, and a liquid crystal alignment film and a liquid crystal display device using the liquid crystal alignment film.
    Type: Application
    Filed: November 1, 2018
    Publication date: May 27, 2021
    Applicant: LG CHEM, LTD.
    Inventors: Hang Ah PARK, Jung Ho JO, Jun Young YOON, Hyeong Seuk YUN
  • Patent number: 11008537
    Abstract: The present invention relates to a cleaning composition for a liquid crystal alignment layer, a manufacturing method of a liquid crystal alignment layer using the same, and a liquid crystal display device including the liquid crystal alignment layer manufactured by the manufacturing method. More specifically, the present invention relates to a cleaning composition for a liquid crystal alignment layer that is capable of solving a non-uniformity problem of the liquid crystal alignment layer and effectively removing an ionic byproduct on a polymer surface to increase anisotropy of the liquid crystal alignment layer, by using a cleaning composition including a specific solvent in a cleaning process after a UV alignment process, and a manufacturing method of a liquid crystal alignment layer.
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: May 18, 2021
    Assignee: LG CHEM, LTD.
    Inventors: Hee Han, Jun Young Yoon, Jung Ho Jo, Hang Ah Park, Soon Ho Kwon, Hyeong Seuk Yun
  • Publication number: 20210130695
    Abstract: A liquid crystal alignment agent composition for producing a liquid crystal alignment film having enhanced alignment property and stability and a high voltage holding ratio, a method of producing a liquid crystal alignment film using the same, and a liquid crystal alignment film and a liquid crystal display device using the same, are provided.
    Type: Application
    Filed: October 10, 2018
    Publication date: May 6, 2021
    Applicant: LG CHEM, LTD.
    Inventors: Soon Ho KWON, Sung Joon MIN, Hang Ah PARK, Hoonseo PARK, Hyeong Seuk YUN, Jung Ho JO
  • Publication number: 20200208055
    Abstract: A polymer having excellent liquid crystal alignment and electrical properties and thus is suitable for use as a liquid crystal alignment agent, a liquid crystal alignment agent including the same, a liquid crystal alignment film formed from the liquid crystal alignment agent, and a liquid crystal display device including the liquid crystal alignment film are provided.
    Type: Application
    Filed: September 20, 2018
    Publication date: July 2, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Soon Ho KWON, Seongku KIM, Sung Joon MIN, Hang Ah PARK, Jun Young YOON, Jung Ho JO
  • Patent number: 10696901
    Abstract: Provided are a method of manufacturing a liquid crystal alignment layer, a liquid crystal alignment layer manufactured by using the same, and a liquid crystal display device including the liquid crystal alignment layer. More specifically, provided are the method of manufacturing the liquid crystal alignment layer with enhanced alignment property and stability, in which a liquid crystal aligning agent is applied onto a substrate, and after drying, alignment treatment is immediately performed by light irradiation while omitting a high-temperature heat treatment process, and then the alignment-treated coating film is cured by heat treatment, thereby reducing light irradiation energy required in the process and simplifying the process by omitting the high-temperature heat treatment process before light irradiation, the liquid crystal alignment layer, and the liquid crystal display device including the same.
    Type: Grant
    Filed: November 2, 2016
    Date of Patent: June 30, 2020
    Assignee: LG CHEM, LTD.
    Inventors: Jung Ho Jo, Hang Ah Park, Soon Ho Kwon, Hee Han, Jun Young Yoon, Hyeong Seuk Yun
  • Publication number: 20200181495
    Abstract: The present invention relates to a liquid crystal aligning agent composition for producing a liquid crystal alignment film having improved film strength together with liquid crystal alignment properties, a method for producing a liquid crystal alignment film using the same, and a liquid crystal alignment film and a liquid crystal display device using the same.
    Type: Application
    Filed: June 26, 2018
    Publication date: June 11, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Sang Mi LEE, Hee HAN, Jung Ho JO, Sung Joon MIN, Hang Ah PARK, Soon Ho KWON, Jun Young YOON, Hyeong Seuk YUN, Seongku KIM, Hoonseo PARK
  • Publication number: 20200165521
    Abstract: A polymer having excellent liquid crystal alignment and electrical properties and thus is suitable for use as a liquid crystal alignment agent, a liquid crystal alignment agent including the same, a liquid crystal alignment film formed from the liquid crystal alignment agent, and a liquid crystal display device including the liquid crystal alignment film are provided.
    Type: Application
    Filed: September 20, 2018
    Publication date: May 28, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Soon Ho KWON, Jung Ho JO, Sung Joon MIN, Hang Ah PARK, Jun Young YOON
  • Publication number: 20200148953
    Abstract: A liquid crystal aligning agent composition for preparing a liquid crystal alignment film having enhanced stability and exhibiting excellent electrical characteristics, a method for preparing a liquid crystal alignment film using the same, and a liquid crystal alignment film and a liquid crystal display device using the liquid crystal alignment film.
    Type: Application
    Filed: October 22, 2018
    Publication date: May 14, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Soon Ho KWON, Jung Ho JO, Hang Ah PARK, Jun Young YOON, Hyeong Seuk YUN
  • Patent number: 10606128
    Abstract: The present invention relates to a method for preparing a photo-alignment layer. The photo-alignment layer prepared by the preparation method exhibits a high imidization ratio as well as an excellent aligning stability of liquid crystal, chemical resistance and strength, and has an excellent afterimage suppressing effect by an AC driving of a liquid crystal display element.
    Type: Grant
    Filed: September 6, 2016
    Date of Patent: March 31, 2020
    Assignee: LG CHEM, LTD.
    Inventors: Soon Ho Kwon, Hee Han, Jung Ho Jo, Hang Ah Park, Jun Young Yoon, Hyeong Seuk Yun
  • Publication number: 20200063035
    Abstract: A liquid crystal aligning agent composition for preparing a liquid crystal alignment film having enhanced stability and exhibiting excellent electrical characteristics, a method for preparing a liquid crystal alignment film using the same, and a liquid crystal alignment film and a liquid crystal display device using the liquid crystal alignment film.
    Type: Application
    Filed: October 22, 2018
    Publication date: February 27, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Soon Ho KWON, Hang Ah PARK, Jun Young YOON, Hyeong Seuk YUN, Jung Ho JO
  • Patent number: 10526540
    Abstract: The present invention relates to a liquid crystal aligning agent for use as an alignment layer for liquid crystal display. More specifically, the present invention relates to a liquid crystal aligning agent capable of improving an imidization rate and thus exhibiting an excellent alignment state, a liquid crystal alignment layer comprising the same, a preparation method thereof and a liquid crystal display comprising the liquid crystal alignment layer.
    Type: Grant
    Filed: March 28, 2017
    Date of Patent: January 7, 2020
    Assignee: LG CHEM, LTD.
    Inventors: Soon Ho Kwon, Jung Ho Jo, Hang Ah Park, Hyeong Seuk Yun, Hee Han, Jun Young Yoon
  • Publication number: 20200002614
    Abstract: The present invention provides a liquid crystal aligning agent composition that has excellent storage stability, can secure a high imidization rate, and can produce a liquid crystal alignment film having improved film strength together with liquid crystal alignment properties, a method for producing a liquid crystal alignment film using the same, and a liquid crystal alignment film and a liquid crystal display device using the same.
    Type: Application
    Filed: June 26, 2018
    Publication date: January 2, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Sang Mi LEE, Jung Ho JO, Hang Ah PARK, Hyeong Seuk YUN, Jun Young YOON
  • Publication number: 20190390116
    Abstract: The present invention relates to a liquid crystal aligning agent composition capable of securing a high imidization rate under relatively mild curing conditions, minimizing side reactions and thus having excellent stability, a method for producing a liquid crystal alignment film using the same, and a liquid crystal alignment film and a liquid crystal display device using the same.
    Type: Application
    Filed: June 26, 2018
    Publication date: December 26, 2019
    Applicant: LG CHEM, LTD.
    Inventors: Jung Ho JO, Hee HAN, Sung Joon MIN, Hang Ah PARK, Sang Mi LEE, Soon Ho KWON, Jun Young YOON, Hyeong Seuk YUN, Seongku KIM
  • Publication number: 20190106628
    Abstract: The present invention provides a method for preparing a liquid crystal alignment layer having excellent alignment properties and stability as well as enhanced electrical characteristics such as voltage holding ratio. The present invention also provides a liquid crystal alignment layer prepared by the preparation method above and a liquid crystal display device comprising the liquid crystal alignment layer thus prepared.
    Type: Application
    Filed: April 25, 2017
    Publication date: April 11, 2019
    Applicant: LG CHEM, LTD.
    Inventors: Hyeong Seuk YUN, Soon Ho KWON, Hee HAN, Jung Ho JO, Hang Ah PARK, Jun Young YOON
  • Publication number: 20190049798
    Abstract: The present invention provides a liquid crystal alignment film not only having an excellent alignment property and stability, but also having high film strength, and thus exhibiting excellent durability and a high residual image property, a method for preparing the same, and a liquid crystal display device using the same.
    Type: Application
    Filed: October 18, 2018
    Publication date: February 14, 2019
    Applicant: LG CHEM, LTD.
    Inventors: Hyeong Seuk YUN, Jung Ho JO, Sung Joon MIN, Hee HAN, Hang Ah PARK, Sang Mi LEE, Soon Ho KWON, Jun Young YOON
  • Publication number: 20190016998
    Abstract: The present invention relates to a cleaning composition for a liquid crystal alignment layer, a manufacturing method of a liquid crystal alignment layer using the same, and a liquid crystal display device including the liquid crystal alignment layer manufactured by the manufacturing method. More specifically, the present invention relates to a cleaning composition for a liquid crystal alignment layer that is capable of solving a non-uniformity problem of the liquid crystal alignment layer and effectively removing an ionic byproduct on a polymer surface to increase anisotropy of the liquid crystal alignment layer, by using a cleaning composition including a specific solvent in a cleaning process after a UV alignment process, and a manufacturing method of a liquid crystal alignment layer.
    Type: Application
    Filed: January 26, 2017
    Publication date: January 17, 2019
    Applicant: LG CHEM, LTD.
    Inventors: Hee HAN, Jun Young YOON, Jung Ho JO, Hang Ah PARK, Soon Ho KWON, Hyeong Seuk YUN