Patents by Inventor Ji-Hwang LEE

Ji-Hwang LEE 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: 20240105963
    Abstract: A method for manufacturing a gas diffusion layer for a fuel cell wherein carbon nanotubes are impregnated into Korean paper, thereby enhancing electroconductivity, and a gas diffusion layer manufactured thereby. The method for manufacturing a gas diffusion layer for a fuel cell which is to manufacture a gas diffusion layer as a constituent member of a unit cell in a fuel cell, includes a support preparation step of preparing a support with Korean paper; a dispersion preparation step of dispersing a carbon substance in a solvent to form a dispersion, a coating step of coating the support with the dispersion, and a thermal treatment step of thermally treating the dispersion-coated support to fix the carbon substance to the support.
    Type: Application
    Filed: March 6, 2023
    Publication date: March 28, 2024
    Inventors: Seung Tak Noh, Ji Han Lee, In Seok Lee, Jae Man Park, Won Jong Choi, Choong Hee Kim, Seong Hwang Kim, Jong Hoon Lee, Soo Jin Park, Seul Yi Lee
  • Patent number: 11943994
    Abstract: A display device and a method of manufacturing the same are provided. The display device, comprises a first base substrate, a first barrier layer disposed on the first base substrate, a second base substrate disposed on the first barrier layer, at least one transistor disposed on the second base substrate, and an organic light emitting diode disposed on the at least one transistor, wherein the first barrier layer includes a silicon oxide, and has an adhesion force of 200 gf/inch or more to the second base substrate.
    Type: Grant
    Filed: August 17, 2021
    Date of Patent: March 26, 2024
    Assignee: Samsung Display Co., Ltd.
    Inventors: Chul Min Bae, Eun Jin Kwak, Jin Suk Lee, Jung Yun Jo, Ji Hye Han, Young In Hwang
  • Publication number: 20220376211
    Abstract: An electronic device includes a light emitting element. An encapsulation layer is disposed on the light emitting element. The encapsulation layer includes a polymer having a molecular anisotropy greater than or equal to about 1.4. A sensor layer is disposed on the encapsulation layer. The molecular anisotropy is a ratio of a first absorbance of an infrared spectrum in an infrared spectroscopy when first polarized light that is polarized in a first direction perpendicular to a second direction is incident to the polymer to a second absorbance of an infrared spectrum in an infrared spectroscopy when second polarized light that is polarized in the second direction is incident to the polymer.
    Type: Application
    Filed: February 25, 2022
    Publication date: November 24, 2022
    Inventors: KIHYUN KIM, Ji Hwang Lee, Manjae Park, Younggil Park, Goeun Yun
  • Patent number: 11372496
    Abstract: A display device includes a display panel, an input sensor disposed on the display panel, and an upper layer structure disposed on the input sensor. The upper layer structure includes a dielectric constant control layer which controls a sensing sensitivity of the input sensor.
    Type: Grant
    Filed: December 31, 2020
    Date of Patent: June 28, 2022
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jiwon Jung, Changmok Kim, Ji Hwang Lee, Young Seo Choi
  • Patent number: 11244989
    Abstract: A display device includes a base layer, a circuit layer, a light emitting element layer, and a thin film encapsulation layer. The base layer includes a display area and a non-display area. The circuit layer includes a plurality of insulating layers, at least one of which has an opening. The light emitting element layer includes a light emitting area overlapping the display area, a valley area overlapping the opening and having a concave shape, and a peak area overlapping the non-display area and being on the circuit layer. The thin film encapsulation layer includes an organic encapsulation layer that covers the light emitting area, the valley area, and at least a portion of the peak area.
    Type: Grant
    Filed: July 14, 2020
    Date of Patent: February 8, 2022
    Assignee: Samsung Display Co., Ltd.
    Inventors: Seungwoo Seo, Seungjae Lee, Ji Hwang Lee, Sohra Han
  • Publication number: 20210294451
    Abstract: A display device includes a display panel, an input sensor disposed on the display panel, and an upper layer structure disposed on the input sensor. The upper layer structure includes a dielectric constant control layer which controls a sensing sensitivity of the input sensor.
    Type: Application
    Filed: December 31, 2020
    Publication date: September 23, 2021
    Inventors: JIWON JUNG, CHANGMOK KIM, JI HWANG LEE, YOUNG SEO CHOI
  • Publication number: 20210126057
    Abstract: A display device includes a base layer, a circuit layer, a light emitting element layer, and a thin film encapsulation layer. The base layer includes a display area and a non-display area. The circuit layer includes a plurality of insulating layers, at least one of which has an opening. The light emitting element layer includes a light emitting area overlapping the display area, a valley area overlapping the opening and having a concave shape, and a peak area overlapping the non-display area and being on the circuit layer. The thin film encapsulation layer includes an organic encapsulation layer that covers the light emitting area, the valley area, and at least a portion of the peak area.
    Type: Application
    Filed: July 14, 2020
    Publication date: April 29, 2021
    Inventors: Seungwoo SEO, Seungjae LEE, Ji Hwang LEE, Sohra HAN
  • Patent number: 9246120
    Abstract: An organic light-emitting diode includes a first electrode, an intermediate layer on the first electrode, and a second electrode on the intermediate layer. The intermediate layer includes an emission layer including an organic material, and a functional layer between the second electrode and the emission layer and including at least one of a metal compound and a semiconductor compound including at least one of an oxygen atom and a sulfur atom. An oxygen concentration in the functional layer increases toward the second electrode, and a sulfur concentration in the functional layer increases toward the emission layer.
    Type: Grant
    Filed: November 13, 2013
    Date of Patent: January 26, 2016
    Assignee: Samsung Display Co., Ltd.
    Inventors: Ji-Hwang Lee, Eui-Gyu Kim, A-Rong Lee, Yool-Guk Kim, Seok-Soon Back
  • Publication number: 20150021558
    Abstract: An organic light-emitting diode includes a first electrode, an intermediate layer on the first electrode, and a second electrode on the intermediate layer. The intermediate layer includes an emission layer including an organic material, and a functional layer between the second electrode and the emission layer and including at least one of a metal compound and a semiconductor compound including at least one of an oxygen atom and a sulfur atom. An oxygen concentration in the functional layer increases toward the second electrode, and a sulfur concentration in the functional layer increases toward the emission layer.
    Type: Application
    Filed: November 13, 2013
    Publication date: January 22, 2015
    Applicant: SAMSUNG DISPLAY CO., LTD.
    Inventors: Ji-Hwang Lee, Eui-Gyu Kim, A-Rong Lee, Yool-Guk Kim, Seok-Soon Back
  • Patent number: 8455373
    Abstract: The present invention provides ink-jet printing ink for organic semiconductors, and, more particularly, provides ink-jet printing ink for organic semiconductors, which can be used to form a uniform crystalline thin film. The ink-jet printing ink of the present invention includes a mixed solvent composed of a first solvent and a second solvent having a higher boiling point and lower surface tension than the first solvent, thus forming a uniform crystalline thin film in a volatilization process. Further, the present invention provides a circular organic thin film transistor having a high field-effect mobility of about 0.12 cm2V1S?1.
    Type: Grant
    Filed: July 3, 2008
    Date of Patent: June 4, 2013
    Assignee: Postech Academy-Industry Foundation
    Inventors: Kil Won Cho, Hwa Sung Lee, Ji Hwang Lee, Wi Hyoung Lee, Jung Ah Lim, Yeong Don Park
  • Publication number: 20110297216
    Abstract: An organic solar cell includes an anode and a cathode facing each other, a photoactive layer disposed between the anode and the cathode and including an electron donor and an electron acceptor, and a transparent auxiliary layer disposed between the anode and the cathode and in contact with the photoactive layer. The transparent auxiliary layer includes inorganic nanoparticles and a polymer.
    Type: Application
    Filed: November 9, 2010
    Publication date: December 8, 2011
    Applicants: POSTECH ACADEMY-INDUSTRY FOUNDATION, SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Soo-Ghang IHN, Kil-Won CHO, Ji-Hwang LEE, Sae-Byeok JO