Patents by Inventor Sung-Ho Chun

Sung-Ho Chun 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: 20210102021
    Abstract: A polymer capable of securing pattern uniformity in a photoresist pattern, the polymer containing a photoacid generator by including a structure unit represented by Chemical Formula 1a; and a structure unit represented by Chemical Formula 1b as shown in the specification.
    Type: Application
    Filed: October 31, 2019
    Publication date: April 8, 2021
    Applicant: LG CHEM, LTD.
    Inventors: Jihye KIM, Sung Ho CHUN, Minyoung LIM
  • Patent number: 10651401
    Abstract: The present invention relates to a method for preparing a perovskite compound usable as a light absorber of a solar cell, and provides a method for preparing a light absorber of a solar cell in which the crystallinity of a perovskite compound is increased, resulting in an increase in the stability and efficiency of the solar cell.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: May 12, 2020
    Assignee: LG CHEM, LTD.
    Inventors: Ji Hye Kim, Sung-Ho Chun, Jung Ha Park, Chan Yeup Chung, Tae Seob Lee
  • Patent number: 10527758
    Abstract: The present invention relates to a composition for forming a dye-type polarizer, which can be used to provide a dye-type polarizer showing excellent degree of polarization, heat resistance and dichroic ratio, and to a dye-type polarizer. The composition for forming a dye-type polarizer includes a curable anisotropic dye having a particular chemical structure; and an orientation auxiliary agent having a predetermined chemical structure.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: January 7, 2020
    Assignee: LG Chem, Ltd.
    Inventors: Dong Woo Yoo, Sung-Ho Chun, Kyung Chang Seo, Hyeong Bin Jang
  • Patent number: 10453420
    Abstract: This disclosure relates to a base film, a laminated structure including the same, and a display device. More specifically, this disclosure relates to a base film that includes a polymer having a cyclic olefin-based repeat unit containing exo-isomers above a specific content and a copolymer including a styrene-based repeat unit and a maleimide-based repeat unit, exhibits a high glass transition temperature and thus has excellent heat resistance, and has high light transmittance, a laminated structure including the same, and a display device.
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: October 22, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Jeong Wook Mun, Jung Woo Kim, Sung-Ho Chun, Dai Seung Choi
  • Patent number: 10047183
    Abstract: There are provided a photoreactive copolymer and an alignment layer comprising the same, and more particularly, to a photoreactive copolymer including a copolymer of two different kinds of monomers, and an alignment layer comprising the same. The photoreactive copolymer according to the present invention may have excellent liquid crystal alignment property and alignment speed, easily change an alignment direction depending on a polarization direction, and have excellent solubility to an organic solvent, such that the photoreactive copolymer may be used in various fields such as a liquid crystal device, and the like.
    Type: Grant
    Filed: September 26, 2014
    Date of Patent: August 14, 2018
    Assignee: LG Chem, Ltd.
    Inventors: Eun Seok Park, Sung-Ho Chun, Dai Seung Choi
  • Publication number: 20180226590
    Abstract: The present invention relates to a method for preparing a perovskite compound usable as a light absorber of a solar cell, and provides a method for preparing a light absorber of a solar cell in which the crystallinity of a perovskite compound is increased, resulting in an increase in the stability and efficiency of the solar cell.
    Type: Application
    Filed: October 27, 2016
    Publication date: August 9, 2018
    Applicant: LG CHEM, LTD.
    Inventors: Ji Hye KIM, Sung-Ho CHUN, Jung Ha PARK, Chan Yeup CHUNG, Tae Seob LEE
  • Patent number: 10042209
    Abstract: This invention relates to an optical anisotropic film wherein liquid crystals of a liquid crystal layer can be more effectively aligned using a photo-alignment layer, and superior stability of liquid crystal alignment and high interaction between the liquid crystal layer and the photo-alignment layer can be exhibited, and to an optical device including the optical anisotropic film. The optical anisotropic film includes a substrate having P (polarity) of 0.01 to 0.35 as defined by a predetermined equation; a photo-alignment layer formed on the substrate and including a photo-alignment polymer in which at least a portion of a photo-reactive group is optically aligned, with P (polarity) of 0.02 to 0.28; and a liquid crystal layer formed on the photo-alignment layer.
    Type: Grant
    Filed: August 21, 2013
    Date of Patent: August 7, 2018
    Assignee: LG CHEM, LTD.
    Inventors: Sung Kyoung Lee, Dong Woo Yoo, Sung-Ho Chun, Dai Seung Choi
  • Publication number: 20180204684
    Abstract: The present invention relates to an organic/inorganic hybrid perovskite having a novel structure which can be used as an absorber of a solar cell, a method for preparing the same, and a solar cell comprising the same. The compound according to the present invention has a perovskite structure into which deuterium is introduced, thereby exhibiting high humidity and light stability, and thus can be useful as an absorber of a solar cell.
    Type: Application
    Filed: December 2, 2016
    Publication date: July 19, 2018
    Applicant: LG Chem, Ltd.
    Inventors: Eun Seok PARK, Sung Kil HONG, Sung-Ho CHUN
  • Patent number: 10023800
    Abstract: The present invention relates to a composition for manufacturing optical elements with negative optical dispersion, and an optically anisotropic body prepared therefrom. According to the present invention, the optically anisotropic body showing stable reverse wavelength dispersion can be prepared more simply by using the composition for optical elements, and it is possible to apply the same to liquid crystal display devices as an optical film such as a thin-layer broadband ?/4 plate.
    Type: Grant
    Filed: September 19, 2014
    Date of Patent: July 17, 2018
    Assignee: LG CHEM, LTD.
    Inventors: Jung Hyun Kim, Sung-Ho Chun, Kyung Chang Seo, Min Hyung Lee, Jun Seong Ahn
  • Patent number: 9982071
    Abstract: There are provided a novel cyclic olefin compound having a photoreactive group and a photoreactive polymer. The cyclic olefin compound is applicable to various photoreactions, such as of liquid crystal alignment layers and can be preferably used as a precursor of various organic compounds or polymers.
    Type: Grant
    Filed: September 26, 2014
    Date of Patent: May 29, 2018
    Assignee: LG Chem, Ltd.
    Inventors: Eun Seok Park, Sung-Ho Chun, Dai Seung Choi
  • Patent number: 9963418
    Abstract: Provided is a purification method of a photoreactive compound, and a photoreactive compound. According to the purification method of the present invention, a light and heat-sensitive photoreactive compound may be purified in high purity, thereby polymerizing a photoreactive polymer having improved physical properties.
    Type: Grant
    Filed: August 1, 2014
    Date of Patent: May 8, 2018
    Assignee: LG CHEM, LTD.
    Inventors: Dai Seung Choi, Sung-Ho Chun
  • Patent number: 9952364
    Abstract: Disclosed therein are an optical film and a display device comprising the same, where the optical film comprises a first optically anisotropic layer including a liquid crystal compound and a second optically anisotropic layer including a photoreactive polymer, thereby securing improved photoreaction rate and excellent liquid crystal alignment.
    Type: Grant
    Filed: August 6, 2013
    Date of Patent: April 24, 2018
    Assignee: LG CHEM, LTD.
    Inventors: Kyung Chang Seo, Sung-Ho Chun, Dai Seung Choi, Mi Ra Hong, Dong Woo Yoo
  • Patent number: 9850196
    Abstract: The present invention relates to a reverse wavelength dispersion compound, a reverse wavelength dispersion composition including the same, and an optically anisotropic body including the same. The reverse wavelength dispersion composition according to the present invention can provide a stronger and more stable reverse wavelength dispersion property, and makes it possible to provide an optically anisotropic body having excellent optical properties.
    Type: Grant
    Filed: September 19, 2014
    Date of Patent: December 26, 2017
    Assignee: LG CHEM, LTD.
    Inventors: Min Hyung Lee, Sung-Ho Chun, Kyung Chang Seo, Jung Hyun Kim, Mi Ra Hong, Hyeong Bin Jang, Jeong Wook Mun
  • Patent number: 9791745
    Abstract: Disclosed therein are a photoalignment polyimide copolymer making it easier to form a liquid crystal alignment layer with excellences in alignment properties, thermal and structural stabilities, and adhesiveness to a substrate, and a liquid crystal alignment layer using the same. The photoalignment polyimide copolymer includes all the three types of repeating units each having a defined structure.
    Type: Grant
    Filed: August 26, 2013
    Date of Patent: October 17, 2017
    Assignee: LG CHEM, LTD.
    Inventors: Seung-Yeon Hwang, Sung-Ho Chun, Dong-Woo Yoo, Hyeong-Bin Jang
  • Patent number: 9720136
    Abstract: This invention relates to a photo-alignment copolymer which enables the formation of an optical anisotropic film that exhibits superior optical anisotropy, an optical anisotropic film using the photo-alignment copolymer and a method of manufacturing the optical anisotropic film. The photo-alignment copolymer includes both of a photo-alignment repeating unit having a photo-reactive functional group such as a cinnamate-based functional group, a chalcone-based functional group, an azo-based functional group or a coumarin-based functional group, and a repeating unit having a specific structure able to increase optical anisotropy.
    Type: Grant
    Filed: August 27, 2013
    Date of Patent: August 1, 2017
    Assignee: LG CHEM, LTD.
    Inventors: Dai Seung Choi, Dong Woo Yoo, Sung-Ho Chun, Hyeong Bin Jang, Mi Ra Hong
  • Publication number: 20170154735
    Abstract: In the organic-inorganic hybrid perovskite compounds according to the present invention, a zero point energy becomes lower, and thus the chemical stability of the perovskite compounds increases, thereby increasing the stability of the solar cells. Accordingly, the organic-inorganic hybrid perovskite compound according to the present invention can make the best use of a light-absorbing material of the solar cells.
    Type: Application
    Filed: October 19, 2015
    Publication date: June 1, 2017
    Applicant: LG CHEM, LTD
    Inventors: Eun Seok PARK, Sung Kil HONG, Sung-Ho CHUN, Dong Woo YOO
  • Patent number: 9505979
    Abstract: The present invention relates to a polymerizable liquid crystal compound, a liquid crystal composition including the same, and an optical film including the same. The polymerizable liquid crystal compound according to the present invention has at least two functional groups making intermolecular interaction possible in its molecule, and thus it is possible to form a liquid crystal layer having high orientation stability by coating the composition including the same. According to this, the optical film prepared by using the composition can be suitably used in anti-reflection films and so on for liquid crystal displays or OLED displays.
    Type: Grant
    Filed: September 19, 2014
    Date of Patent: November 29, 2016
    Assignee: LG CHEM, LTD.
    Inventors: Min Hyung Lee, Young Jee Song, Sung-Ho Chun, Kyung Chang Seo, Hyeong Bin Jang, Ji Young Choi
  • Publication number: 20160274274
    Abstract: The present invention relates to a composition for forming a dye-type polarizer, which can be used to provide a dye-type polarizer showing excellent degree of polarization, heat resistance and dichroic ratio, and to a dye-type polarizer. The composition for forming a dye-type polarizer includes a curable anisotropic dye having a particular chemical structure; and an orientation auxiliary agent having a predetermined chemical structure.
    Type: Application
    Filed: December 22, 2014
    Publication date: September 22, 2016
    Inventors: Dong Woo YOO, Sung-Ho CHUN, Kyung Chang SEO, Hyeong Bin JANG
  • Patent number: 9416317
    Abstract: The present description relates to a polymerizable liquid crystal compound, a polymerizable liquid crystal composition including the same, and an optically anisotropic body.
    Type: Grant
    Filed: August 7, 2015
    Date of Patent: August 16, 2016
    Assignee: LG Chem, Ltd.
    Inventors: Dai Seung Choi, Sung-Ho Chun, Dong-Woo Yoo, Mi Ra Hong, Kyung Chang Seo, Hyeong Bin Jang, Jung Hyun Kim, Min Hyung Lee, Eun Seok Park
  • Publication number: 20160222147
    Abstract: There are provided a photoreactive copolymer and an alignment layer comprising the same, and more particularly, to a photoreactive copolymer including a copolymer of two different kinds of monomers, and an alignment layer comprising the same. The photoreactive copolymer according to the present invention may have excellent liquid crystal alignment property and alignment speed, easily change an alignment direction depending on a polarization direction, and have excellent solubility to an organic solvent, such that the photoreactive copolymer may be used in various fields such as a liquid crystal device, and the like.
    Type: Application
    Filed: September 26, 2014
    Publication date: August 4, 2016
    Inventors: Eun Seok PARK, Sung-Ho CHUN, Dai Seung CHOI