Patents by Inventor Changwoo Chun

Changwoo 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: 20240032231
    Abstract: Embodiments of the disclosure relate to a cover window and a display device including the cover window. Specifically, there may be provided a cover window having enhanced flexibility by efficiently dispersing the stress applied during elongation by including a hard coating layer having a plurality of hexagonal patterns and a display device including the cover window.
    Type: Application
    Filed: July 18, 2023
    Publication date: January 25, 2024
    Inventor: Changwoo Chun
  • Publication number: 20230335020
    Abstract: Provided is a cover window. The cover window includes a substrate layer. The cover window further includes a hard-coating layer on the substrate layer. The cover window further includes a protective film disposed on the hard-coating layer and including a base film and a plurality of protrusions protruding from the base film. The cover window further includes an adhesive layer disposed on surfaces of the plurality of protrusions and bonding the hard-coating layer and the protective film. The protective film includes a first area and second areas disposed on both sides of the first area. The plurality of protrusions are disposed in the first area. The plurality of protrusions have a shape in which the protrusions disposed on one side and the protrusions disposed on the other side are symmetrical to each other with respect to a central line of the first area.
    Type: Application
    Filed: June 21, 2023
    Publication date: October 19, 2023
    Applicant: LG DISPLAY CO., LTD.
    Inventors: Changwoo CHUN, Jungmin LEE, Sejin JANG, Youngjoo PARK
  • Patent number: 11721244
    Abstract: Provided is a cover window. The cover window includes a substrate layer. The cover window further includes a hard-coating layer on the substrate layer. The cover window further includes a protective film disposed on the hard-coating layer and including a base film and a plurality of protrusions protruding from the base film. The cover window further includes an adhesive layer disposed on surfaces of the plurality of protrusions and bonding the hard-coating layer and the protective film. The protective film includes a first area and second areas disposed on both sides of the first area. The plurality of protrusions are disposed in the first area. The plurality of protrusions have a shape in which the protrusions disposed on one side and the protrusions disposed on the other side are symmetrical to each other with respect to a central line of the first area.
    Type: Grant
    Filed: December 22, 2020
    Date of Patent: August 8, 2023
    Assignee: LG Display Co., Ltd.
    Inventors: Changwoo Chun, Jungmin Lee, Sejin Jang, Youngjoo Park
  • Publication number: 20230200204
    Abstract: The present disclosure relates to a flexible display device, and according to an aspect of the present disclosure, a flexible display device includes a display panel including a folding area and a non-folding area; a back plate which is disposed below the display panel and supports the display panel; and a bottom plate which is disposed below the back plate and includes a plurality of grooves so as to correspond to the folding area, and a plurality of nano helix structures disposed so as to correspond to the plurality of grooves. Therefore, the flexible display device forms a groove pattern in the bottom plate, and includes a nano helix structure in each of the plurality of grooves, to effectively relieve the folding stress and reduce the visibility of the pattern, finally an appearance quality may be improved.
    Type: Application
    Filed: November 10, 2022
    Publication date: June 22, 2023
    Applicant: LG Display Co., Ltd.
    Inventors: MinHo LEE, Eun ROH, Changwoo CHUN, Giyoun KIM, Sejin JANG, Minwan KIM, Yeonjae JEONG
  • Publication number: 20230199983
    Abstract: A foldable display apparatus includes a display panel having a light-emitting element disposed thereon, a cover window disposed on top of the display panel, a bottom plate disposed beneath the display panel, a bellows for supporting at least a portion of the bottom plate, a first support coupled with one end of the bellows, and an edge coupled with the other end of the bellows.
    Type: Application
    Filed: November 16, 2022
    Publication date: June 22, 2023
    Inventors: Jieun Lee, Changwoo Chun, Nohjin Myung, Sanghoon Oh, Seungkyu Lee, Eun Roh
  • Publication number: 20230017835
    Abstract: The present disclosure relates to a flexible display device, and more particularly, a flexible display device includes a display panel, and a cover member which is disposed on the display panel and includes a thin glass and an adhesive member disposed so as to enclose the thin glass, at this time, the adhesive member includes a first adhesive member disposed so as to enclose an upper surface and a side surface of the thin glass and a second adhesive member disposed on a lower surface of the thin glass. According to the present disclosure, the flexible display device disposes a protective film above the cover member to provide a scattering suppressing effect and improve a surface hardness, a compression characteristic, the impact resistance and folding characteristic.
    Type: Application
    Filed: July 6, 2022
    Publication date: January 19, 2023
    Applicant: LG Display Co., Ltd.
    Inventors: Wansoo LEE, Youngjoo PARK, ByoungHar HWANG, Taehyoung KWAK, Changwoo CHUN
  • Publication number: 20220020298
    Abstract: The present disclosure relates to a cover window and a flexible display device including the same. The cover window according to an exemplary embodiment of the present disclosure includes a first layer having a first modulus, a second layer disposed on the first layer and having a second modulus smaller than the first modulus, and a third layer disposed on the second layer and having a third modulus equal to or larger than the first modulus, and in which the third layer includes a nanoparticle-polyurethane complex in which polyurethane is bonded with nanoparticles by a covalent bond. Therefore, the cover window of the present disclosure provides effects that the folding and rolling are possible with excellent surface characteristic and the restorability against the pressing and excellent optical property.
    Type: Application
    Filed: July 8, 2021
    Publication date: January 20, 2022
    Inventors: Changwoo Chun, Sejin Jang, JooHye Park, Wansoo Lee
  • Publication number: 20210201712
    Abstract: Provided is a cover window. The cover window includes a substrate layer. The cover window further includes a hard-coating layer on the substrate layer. The cover window further includes a protective film disposed on the hard-coating layer and including a base film and a plurality of protrusions protruding from the base film. The cover window further includes an adhesive layer disposed on surfaces of the plurality of protrusions and bonding the hard-coating layer and the protective film. The protective film includes a first area and second areas disposed on both sides of the first area. The plurality of protrusions are disposed in the first area. The plurality of protrusions have a shape in which the protrusions disposed on one side and the protrusions disposed on the other side are symmetrical to each other with respect to a central line of the first area.
    Type: Application
    Filed: December 22, 2020
    Publication date: July 1, 2021
    Applicant: LG DISPLAY CO., LTD.
    Inventors: Changwoo CHUN, Jungmin LEE, Sejin JANG, Youngjoo PARK
  • Patent number: 10288943
    Abstract: A black sealant composition includes magnetic nanoparticles including a core and a shell surrounding the core, conductive black particles having a black color, and a resin including the magnetic nanoparticles and the conductive black particles dispersed therein.
    Type: Grant
    Filed: November 22, 2013
    Date of Patent: May 14, 2019
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Changwoo Chun, Jinwuk Kim, Byunggeol Kim, Sungwoo Kim, Kyungyeol Ryu
  • Patent number: 9241411
    Abstract: A substrate having a transparent electrode for a flexible display which has flexibility and transparency and is resistant to stress of bending, and a method of fabricating the same are provided. By forming a transparent electrode of nanowires resistant to stress of bending on a substrate formed of a shape memory polymer (SMP) material, an increase in resistance due to bending can be prevented and the original form can be recovered. The method for fabricating a substrate having a transparent electrode for a flexible display includes: applying a nanowire dispersion solution of methanol to a glass substrate to form a nanowire electrode; coating the glass substrate with the nanowire electrode formed thereon, with an acrylic shape memory polymer (SMP) to form an SMP thin film; curing the SMP thin film through UV irradiation to form an SMP substrate; and removing the glass substrate from the SMP substrate.
    Type: Grant
    Filed: December 11, 2013
    Date of Patent: January 19, 2016
    Assignee: LG DISPLAY CO., LTD.
    Inventors: KyungYeol Ryu, JinWuk Kim, ByungGeol Kim, SungWoo Kim, ChangWoo Chun
  • Publication number: 20140158411
    Abstract: A substrate having a transparent electrode for a flexible display which has flexibility and transparency and is resistant to stress of bending, and a method of fabricating the same are provided. By forming a transparent electrode of nanowires resistant to stress of bending on a substrate formed of a shape memory polymer (SMP) material, an increase in resistance due to bending can be prevented and the original form can be recovered. The method for fabricating a substrate having a transparent electrode for a flexible display includes: applying a nanowire dispersion solution of methanol to a glass substrate to form a nanowire electrode; coating the glass substrate with the nanowire electrode formed thereon, with an acrylic shape memory polymer (SMP) to form an SMP thin film; curing the SMP thin film through UV irradiation to form an SMP substrate; and removing the glass substrate from the SMP substrate.
    Type: Application
    Filed: December 11, 2013
    Publication date: June 12, 2014
    Applicant: LG DISPALY CO., LTD.
    Inventors: Kyung Yeol Ryu, JinWuk Kim, ByungGeol Kim, SungWoo Kim, ChangWoo Chun
  • Publication number: 20140147659
    Abstract: A black sealant composition includes magnetic nanoparticles including a core and a shell surrounding the core, conductive black particles having a black color, and a resin including the magnetic nanoparticles and the conductive black particles dispersed therein.
    Type: Application
    Filed: November 22, 2013
    Publication date: May 29, 2014
    Applicant: LG DISPLAY CO., LTD.
    Inventors: Changwoo Chun, Jinwuk Kim, Byunggeol Kim, Sungwoo Kim, Kyungyeol Ryu