Patents by Inventor Boo-Kyung Kim

Boo-Kyung Kim 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: 11681154
    Abstract: A wearable device which is lighter, relatively safer at the time of breakage, and smaller than a wearable device having a lens substrate that is a glass substrate.
    Type: Grant
    Filed: December 11, 2018
    Date of Patent: June 20, 2023
    Assignee: LG CHEM, LTD.
    Inventors: Hye Min Kim, Yong Suk Kim, Boo Kyung Kim, Yeong Rae Chang, Bu Gon Shin, So Young Choo
  • Patent number: 11680172
    Abstract: The present invention relates to a photocurable coating composition for forming a low refractive layer, a method for preparing an antireflection film using the photocurable coating composition, and an anti-reflective film prepared by using the photocurable coating composition. According to the present invention, a low refractive layer is formed of a photocurable coating composition containing two or more types of photo-polymerizable compounds, a photoinitiator, surface-treated hollow inorganic nanoparticles, and surface-treated solid inorganic nanoparticles.
    Type: Grant
    Filed: February 14, 2017
    Date of Patent: June 20, 2023
    Assignee: LG Chem, Ltd.
    Inventors: Jin Seok Byun, Jae Young Kim, Boo Kyung Kim, Seok Hoon Jang, Yeong Rae Chang
  • Patent number: 11648710
    Abstract: A method for manufacturing a plastic substrate having excellent thickness uniformity, and a plastic substrate having excellent thickness uniformity manufactured thereby.
    Type: Grant
    Filed: November 2, 2018
    Date of Patent: May 16, 2023
    Assignee: LG CHEM, LTD.
    Inventors: Yong Suk Kim, Hye Min Kim, Boo Kyung Kim, Yeong Rae Chang, Young Tae Kim, Ji Young Kim
  • Patent number: 11614567
    Abstract: The present invention relates to a low refractive layer and an anti-reflective film comprising the same. The low refractive layer can exhibit excellent optical properties such as a low reflectance and a high light transmittance, and excellent mechanical properties such as high wear resistance and scratch resistance at the same time, without adversely affecting the color of the polymer resin forming the low refractive layer. In particular, due to the excellent alkali resistance, the low refractive layer can maintain excellent physical properties even after alkali treatment. Therefore, when introducing a low refractive layer to the display device, it is expected that the production process can be simplified and further the production rate and the productivity can significantly increase.
    Type: Grant
    Filed: July 6, 2020
    Date of Patent: March 28, 2023
    Assignee: LG CHEM, LTD.
    Inventors: Boo Kyung Kim, Yeong Rae Chang, Seok Hoon Jang, Eun Kyu Her, Jin Seok Byun
  • Patent number: 11555947
    Abstract: The present invention relates to a low refractive layer and an anti-reflective film comprising the same. The low refractive layer can exhibit excellent optical properties such as a low reflectance and a high light transmittance, and excellent mechanical properties such as high wear resistance and scratch resistance at the same time. In particular, due to the excellent alkali resistance, the low refractive layer can maintain excellent physical properties even after alkali treatment. Therefore, when introducing a low refractive layer to the display device, it is expected that the production process can be simplified and further the production rate and the productivity can significantly increase.
    Type: Grant
    Filed: January 3, 2020
    Date of Patent: January 17, 2023
    Assignee: LG Chem, Ltd.
    Inventors: Boo Kyung Kim, Yeong Rae Chang, Seok Hoon Jang, Jin Seok Byun
  • Patent number: 11548992
    Abstract: The present invention relates to an antireflection film. The antireflection film includes a low refractive index layer having excellent alkali resistance and exhibiting remarkably improved mechanical properties such as scratch resistance and impact resistance as well as reduction of a glare phenomenon, and a base film exhibiting excellent mechanical strength and water resistance in spite of a thin thickness and having no fear of interference fringes occurring. Therefore, such antireflection film can be used as a protective film of a polarizing plate or used as any other component so as to provide a thin display device, and furthermore, can effectively prevent the glare phenomenon of the display device, and can more improve the durability and lifespan thereof.
    Type: Grant
    Filed: March 18, 2021
    Date of Patent: January 10, 2023
    Assignee: LG CHEM, LTD.
    Inventors: Boo Kyung Kim, Yeong Rae Chang, Seok Hoon Jang, Jin Seok Byun
  • Patent number: 11415726
    Abstract: Described herein is an anti-reflective film including: a hard coating layer; and a low-refractive layer containing a binder resin and hollow inorganic nanoparticles and solid inorganic nanoparticles dispersed in the binder resin. The hollow and solid inorganic particles are dispersed in the low-refractive layer such that the amount of the solid inorganic nanoparticles positioned close to an interface between the hard coating layer and the low-refractive layer is larger than that of the hollow inorganic nanoparticles. Also described is a manufacturing method of the anti-reflective film including: applying a resin composition containing a photopolymerizable compound or a (co)polymer thereof, a fluorine-containing compound including a photoreactive functional group, a photoinitiator, hollow inorganic nanoparticles, and solid inorganic nanoparticles on a hard coating layer, and drying the applied resin composition at a temperature of 35° C. to 100° C.; and photocuring the dried resin composition.
    Type: Grant
    Filed: March 16, 2020
    Date of Patent: August 16, 2022
    Assignee: LG CHEM, LTD.
    Inventors: Jin Seok Byun, Heon Kim, Boo Kyung Kim, Seok Hoon Jang, Yeong Rae Chang
  • Patent number: 11312874
    Abstract: The present invention relates to an antireflection film including a low refractive index layer and a hard coating layer, the low refractive index layer including: a binder resin containing a crosslinked polymer of a photopolymerizable compound and a polysilsesquioxane substituted with one or more reactive functional groups; and inorganic fine particles dispersed in the binder resin, wherein a 10-point average roughness (Rz) of the shape of irregularities on the surface of the low refractive index layer is 0.05 ?m to 0.2 ?m.
    Type: Grant
    Filed: March 9, 2017
    Date of Patent: April 26, 2022
    Assignee: LG CHEM, LTD.
    Inventors: Boo Kyung Kim, Yeong Rae Chang, Jae Hoon Shim, Jin Young Park, Jae Pil Koo
  • Patent number: 11292888
    Abstract: A photopolymerizable composition including: a polymer matrix or a precursor thereof containing a reaction product of an acrylate-based polyol and a compound containing at least one isocyanate group; a photoreactive monomer; and a non-reactive fluoro compound and a photoinitiator; a hologram recording medium produced from the composition; an optical element including the hologram recording medium; and a method of recording a hologram using the photopolymerizable composition.
    Type: Grant
    Filed: October 16, 2018
    Date of Patent: April 5, 2022
    Assignee: LG CHEM, LTD.
    Inventors: Seok Hoon Jang, Heon Kim, Boo Kyung Kim, Yeong Rae Chang, Yongjoon Heo, Se Hyun Kwon
  • Patent number: 11275199
    Abstract: The present invention relates to an anti-reflective film exhibiting one or more peaks (qmax) at a scattering vector of 0.0758 to 0.1256 nm?1, in a graph showing a log value of scattering intensity to a scattering vector defined in small-angle X-ray scattering.
    Type: Grant
    Filed: March 11, 2020
    Date of Patent: March 15, 2022
    Assignee: LG CHEM, LTD.
    Inventors: Jin Seok Byun, Jeong Kyu Lee, Boo Kyung Kim, Seok Hoon Jang, Yeong Rae Chang
  • Patent number: 11262481
    Abstract: The present invention relates to an anti-reflective film exhibiting one or more peaks (qmax) at a scattering vector of 0.0758 to 0.1256 nm?1, in a graph showing a log value of scattering intensity to a scattering vector defined in small-angle X-ray scattering.
    Type: Grant
    Filed: March 11, 2020
    Date of Patent: March 1, 2022
    Assignee: LG CHEM, LTD.
    Inventors: Jin Seok Byun, Jeong Kyu Lee, Boo Kyung Kim, Seok Hoon Jang, Yeong Rae Chang
  • Patent number: 11126081
    Abstract: The present disclosure relates to a photopolymer composition including: a polymer matrix or a precursor thereof; a photoreactive monomer including a polyfunctional (meth)acrylate monomer having a refractive index of 1.5 or less and a viscosity at 25° C. of 100 cps or less, and a monofunctional (meth)acrylate monomer having a refractive index of 1.5 or more; and a photoinitiator, wherein a content of the monofunctional (meth)acrylate monomer having a refractive index of 1.5 or more in the photoreactive monomer is 60 wt % or more. The present disclosure also relates to a hologram recording medium produced from the photopolymer composition, an optical element including the hologram recording medium, and a holographic recording method using the photopolymer composition.
    Type: Grant
    Filed: March 14, 2018
    Date of Patent: September 21, 2021
    Assignee: LG CHEM, LTD.
    Inventors: Boo Kyung Kim, Heon Kim, Seok Hoon Jang, Yeong Rae Chang
  • Patent number: 11117981
    Abstract: The present invention relates to a photopolymer composition comprising: a polymer matrix or a precursor thereof including a reaction product of a polyol including a polyrotaxane compound and a compound containing at least one isocyanate group; a photoreactive monomer; and a photoinitiator. The present invention also relates to a hologram recording medium produced from the photopolymer composition, an optical element comprising the hologram recording medium, and a holographic recording method using the photopolymer composition.
    Type: Grant
    Filed: July 2, 2018
    Date of Patent: September 14, 2021
    Assignee: LG CHEM, LTD.
    Inventors: Heon Kim, Boo Kyung Kim, Seok Hoon Jang, Yeong Rae Chang
  • Patent number: 11112599
    Abstract: The present invention relates to an antireflection film which includes a hard coating layer and a low refractive index layer formed on the hard coating layer, wherein a roughness skewness (Rsk) of the concavo-convex shape of the surface is greater than 0.5 and less than 5, and a slope angle of the concavo-convex shape of the surface is greater than 0.01 degree and less than 0.2 degree, and a display device comprising the antireflection film.
    Type: Grant
    Filed: February 10, 2017
    Date of Patent: September 7, 2021
    Assignee: LG Chem, Ltd.
    Inventors: Jung Hyun Seo, Yeong Rae Chang, Jae Hoon Shim, Jin Young Park, Jae Pil Koo, Boo Kyung Kim
  • Publication number: 20210206936
    Abstract: The present invention relates to an antireflection film. The antireflection film includes a low refractive index layer having excellent alkali resistance and exhibiting remarkably improved mechanical properties such as scratch resistance and impact resistance as well as reduction of a glare phenomenon, and a base film exhibiting excellent mechanical strength and water resistance in spite of a thin thickness and having no fear of interference fringes occurring. Therefore, such antireflection film can be used as a protective film of a polarizing plate or used as any other component so as to provide a thin display device, and furthermore, can effectively prevent the glare phenomenon of the display device, and can more improve the durability and lifespan thereof.
    Type: Application
    Filed: March 18, 2021
    Publication date: July 8, 2021
    Applicant: LG CHEM, LTD.
    Inventors: Boo Kyung KIM, Yeong Rae CHANG, Seok Hoon JANG, Jin Seok BYUN
  • Patent number: 10983252
    Abstract: Disclosed herein is an anti-reflective film including: a hard coating layer; and a low-refractive layer containing a binder resin, and hollow inorganic nanoparticles and solid inorganic nanoparticles which are dispersed in the binder resin, wherein the low-refractive layer includes a first layer containing at least 70 vol % of the entire solid inorganic nanoparticles and a second layer containing at least 70 vol % of the entire hollow inorganic nanoparticles, and at the time of fitting polarization ellipticity measured by ellipsometry for the first layer or/and the second layer included in the low-refractive layer using a Cauchy model represented by the following General Equation 1, the second layer satisfies a predetermined condition.
    Type: Grant
    Filed: January 3, 2019
    Date of Patent: April 20, 2021
    Assignee: LG CHEM, LTD.
    Inventors: In Young Song, Jin Seok Byun, Boo Kyung Kim, Seok Hoon Jang, Yeong Rae Chang, Sung Joon Oh
  • Patent number: 10895667
    Abstract: The present invention relates to an antireflection film which exhibits one extremum at a thickness of 35 nm to 55 nm from the surface and exhibiting one extremum at a thickness of 85 nm to 105 nm from the surface in a graph showing the result of Fourier transform analysis for the result of X-ray reflectivity measurement using Cu—K-alpha rays.
    Type: Grant
    Filed: March 9, 2017
    Date of Patent: January 19, 2021
    Assignee: LG CHEM, LTD.
    Inventors: Jin Seok Byun, Ja Pil Koo, Boo Kyung Kim, Seok Hoon Jang, Yeong Rae Chang
  • Publication number: 20200355932
    Abstract: A wearable device which is lighter, relatively safer at the time of breakage, and smaller than a wearable device having a lens substrate that is a glass substrate.
    Type: Application
    Filed: December 11, 2018
    Publication date: November 12, 2020
    Inventors: Hye Min Kim, Yong Suk KIM, Boo Kyung KIM, Yeong Rae CHANG, Bu Gon SHIN, So Young CHOO
  • Publication number: 20200338792
    Abstract: A method for manufacturing a plastic substrate having excellent thickness uniformity, and a plastic substrate having excellent thickness uniformity manufactured thereby.
    Type: Application
    Filed: November 2, 2018
    Publication date: October 29, 2020
    Inventors: Yong Suk KIM, Hye Min KIM, Boo Kyung KIM, Yeong Rae CHANG, Young Tae KIM, Ji Young KIM
  • Publication number: 20200333509
    Abstract: The present invention relates to a low refractive layer and an anti-reflective film comprising the same. The low refractive layer can exhibit excellent optical properties such as a low reflectance and a high light transmittance, and excellent mechanical properties such as high wear resistance and scratch resistance at the same time, without adversely affecting the color of the polymer resin forming the low refractive layer. In particular, due to the excellent alkali resistance, the low refractive layer can maintain excellent physical properties even after alkali treatment. Therefore, when introducing a low refractive layer to the display device, it is expected that the production process can be simplified and further the production rate and the productivity can significantly increase.
    Type: Application
    Filed: July 6, 2020
    Publication date: October 22, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Boo Kyung KIM, Yeong Rae CHANG, Seok Hoon JANG, Eun Kyu HER, Jin Seok BYUN