Patents by Inventor Chan Woo JOO

Chan Woo JOO 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: 20250221109
    Abstract: The present disclosure may provide a display device and a method of manufacturing the same. A display device includes a substrate, a pixel electrode and a common electrode above the substrate and spaced apart from each other, and a light-emitting element including a first contact electrode above the pixel electrode, a second contact electrode above the common electrode, semiconductor layer stacks, a first protective layer surrounding the semiconductor layer stacks in plan view, a reflective layer on the first insulating layer, surrounding the semiconductor layer stacks in plan view, and not contacting the first contact electrode or the second contact electrode, and a second protective layer on the reflective layer and the first insulating layer, and surrounding the semiconductor layer stacks in plan view.
    Type: Application
    Filed: August 13, 2024
    Publication date: July 3, 2025
    Inventor: Chan Woo JOO
  • Publication number: 20250208189
    Abstract: A light emitting element inspection method including: forming a plurality of light emitting element rods by etching a plurality of semiconductor material layers stacked on a growth substrate; forming a protective layer covering a portion of a top surface and a portion of side surfaces of the plurality of light emitting element rods and a contact electrode on the protective layer; forming a metal layer on the side surfaces of the plurality of light emitting element rods and on a portion of the growth substrate on which none of the plurality of light emitting elements rods is located; forming a contact pad connected to the metal layer on the growth substrate; and applying a test power to the contact electrode and the contact pad.
    Type: Application
    Filed: November 19, 2024
    Publication date: June 26, 2025
    Inventor: Chan Woo JOO
  • Publication number: 20250212584
    Abstract: A display device is provided. The display device includes a substrate having a pixel electrode, a light emitting element on the pixel electrode, and a connection electrode layer including a plurality of connection electrodes between the pixel electrode and the light emitting element, the plurality of connection electrodes being spaced from each other.
    Type: Application
    Filed: December 6, 2024
    Publication date: June 26, 2025
    Inventor: Chan Woo JOO
  • Patent number: 12315850
    Abstract: A light-emitting element ink, a display device, and a method of fabricating the display device are provided. The light-emitting element ink includes a light-emitting element solvent, light-emitting elements dispersed in the light-emitting element solvent, each of the light-emitting elements including a plurality of semiconductor layers and an insulating film that surrounds parts of outer surfaces of the semiconductor layers, and a surfactant dispersed in the light-emitting element solvent, the surfactant including a fluorine-based and/or a silicon-based surfactant.
    Type: Grant
    Filed: February 5, 2024
    Date of Patent: May 27, 2025
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jun Bo Sim, Duk Ki Kim, Yong Hwi Kim, Hyo Jin Ko, Chang Hee Lee, Chan Woo Joo, Jae Kook Ha, Na Mi Hong
  • Publication number: 20240178201
    Abstract: A light-emitting element ink, a display device, and a method of fabricating the display device are provided. The light-emitting element ink includes a light-emitting element solvent, light-emitting elements dispersed in the light-emitting element solvent, each of the light-emitting elements including a plurality of semiconductor layers and an insulating film that surrounds parts of outer surfaces of the semiconductor layers, and a surfactant dispersed in the light-emitting element solvent, the surfactant including a fluorine-based and/or a silicon-based surfactant.
    Type: Application
    Filed: February 5, 2024
    Publication date: May 30, 2024
    Inventors: Jun Bo SIM, Duk Ki KIM, Yong Hwi KIM, Hyo Jin KO, Chang Hee LEE, Chan Woo JOO, Jae Kook HA, Na Mi HONG
  • Patent number: 11935876
    Abstract: A light-emitting element ink, a display device, and a method of fabricating the display device are provided. The light-emitting element ink includes a light-emitting element solvent, light-emitting elements dispersed in the light-emitting element solvent, each of the light-emitting elements including a plurality of semiconductor layers and an insulating film that surrounds parts of outer surfaces of the semiconductor layers, and a surfactant dispersed in the light-emitting element solvent, the surfactant including a fluorine-based and/or a silicon-based surfactant.
    Type: Grant
    Filed: April 27, 2021
    Date of Patent: March 19, 2024
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jun Bo Sim, Duk Ki Kim, Yong Hwi Kim, Hyo Jin Ko, Chang Hee Lee, Chan Woo Joo, Jae Kook Ha, Na Mi Hong
  • Publication number: 20230395744
    Abstract: A light emitting element may include a first semiconductor layer, a second semiconductor layer including a first area, a second area, and a third area that have different doping concentrations, an active layer disposed between the first semiconductor layer and the second semiconductor layer, and a first intermediate layer and a second intermediate layer that are disposed between at least one of the first area, the second area, and the third area. The first intermediate layer and the second intermediate layer may include different materials.
    Type: Application
    Filed: February 17, 2023
    Publication date: December 7, 2023
    Applicant: Samsung Display Co., LTD.
    Inventors: Jong Won LEE, Bong Chun PARK, Kwan Jae LEE, So Young LEE, Jin Hyuk JANG, Chan Woo JOO, Seon Hong CHOI
  • Publication number: 20230215983
    Abstract: A method for fabricating a light emitting element includes preparing a substrate, and forming a first semiconductor material layer, a light emitting material layer, a second semiconductor material layer and an electrode material layer on the substrate, forming semiconductor rods spaced apart from each other by etching the first semiconductor material layer, the light emitting material layer, the second semiconductor material layer and the electrode material layer in a direction perpendicular to an upper surface of the substrate, forming an insulating layer surrounding sides of the semiconductor rods through a sol-gel process by immersing the substrate, including the semiconductor rods, in a solution containing a precursor material, and forming light emitting elements by separating the semiconductor rods, including the insulating layer, from the substrate, and the light emitting elements have an external quantum efficiency of 20.2±0.6%.
    Type: Application
    Filed: January 6, 2023
    Publication date: July 6, 2023
    Applicant: Samsung Display Co., LTD.
    Inventors: Mi Hyang SHEEN, Yun Hyuk KO, Dong Uk KIM, Na Ri AHN, Chang Hee LEE, Do Hyung KIM, Ran KIM, In Pyo KIM, Ki Young YEON, Je Won YOO, Joo Hee LEE, Sang Ho JEON, Jung Woon JUNG, Chan Woo JOO, Jin Young CHOI, Na Mi HONG, Jong Il KIM, Jin Ho BYUN, Sang Ho OH, Jae Kwang LEE, Yong Seok CHOI, Jong Hoon HA
  • Publication number: 20220199863
    Abstract: A method for manufacturing a light emitting element includes forming a first semiconductor layer on a substrate, the first semiconductor layer including a semiconductor of a first type; forming an active layer on the first semiconductor layer; forming a second semiconductor layer on the active layer, the second semiconductor layer including a semiconductor of a second type different from the first type; performing an etching process of removing at least a portion of each of the first semiconductor layer, the active layer, and the second semiconductor layer in a direction toward the first semiconductor layer from the second semiconductor layer; and forming a first insulating layer to surround an outer surface of the active layer. The first insulating layer is formed by a wet process.
    Type: Application
    Filed: October 28, 2021
    Publication date: June 23, 2022
    Applicant: Samsung Display Co., LTD.
    Inventors: Se Hun KIM, Chang Hee LEE, Yun Hyuk KO, Jun Bo SIM, Jae Kook HA, Dong Uk KIM, In Pyo KIM, Je Won YOO, Hyun Min CHO, Chan Woo JOO, Na Mi HONG
  • Publication number: 20220165786
    Abstract: A method of manufacturing a light emitting element includes: forming a plurality of light emitting patterns on a stack substrate; forming a polysilazane layer on the plurality of light emitting patterns; forming a first insulating film by curing the polysilazane layer; and forming a second insulating film on the first insulating film. The forming of the first insulating film includes photocuring the polysilazane layer by irradiating ultraviolet rays onto the polysilazane layer. The forming of the plurality of light emitting patterns includes: forming a light emitting stack structure on the stack substrate; and etching the light emitting stack structure.
    Type: Application
    Filed: November 10, 2021
    Publication date: May 26, 2022
    Inventors: Se Hun KIM, Chang Hee LEE, Jae Kook HA, In Pyo KIM, Jun Bo SIM, Hyo Jin KO, Chan Woo JOO, Na Mi HONG
  • Publication number: 20210391308
    Abstract: A light-emitting element ink, a display device, and a method of fabricating the display device are provided. The light-emitting element ink includes a light-emitting element solvent, light-emitting elements dispersed in the light-emitting element solvent, each of the light-emitting elements including a plurality of semiconductor layers and an insulating film that surrounds parts of outer surfaces of the semiconductor layers, and a surfactant dispersed in the light-emitting element solvent, the surfactant including a fluorine-based and/or a silicon-based surfactant.
    Type: Application
    Filed: April 27, 2021
    Publication date: December 16, 2021
    Inventors: Jun Bo SIM, Duk Ki KIM, Yong Hwi KIM, Hyo Jin KO, Chang Hee LEE, Chan Woo JOO, Jae Kook HA, Na Mi HONG