Patents by Inventor Jae Gwang Um

Jae Gwang Um 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: 20250248176
    Abstract: A light emitting element includes a bonding electrode, and a light emitting stack including a first semiconductor layer, an active layer, and a second semiconductor layer sequentially disposed each other on the bonding electrode. At least one protrusion structure is defined on an upper surface of the light emitting stack, and the protrusion structure includes a first protrusion protruding in a direction away from the bonding electrode and defining a groove concave in a direction facing the bonding electrode, and a second protrusion protruding in a direction away from the bonding electrode in the groove of the first protrusion.
    Type: Application
    Filed: August 14, 2024
    Publication date: July 31, 2025
    Applicant: Samsung Display Co., LTD.
    Inventors: Tae Hee LEE, Byoung Yong KIM, Jae Gwang UM, Moon Won CHANG
  • Publication number: 20250218848
    Abstract: In a method of manufacturing a display device, the method includes aligning a metal layer of a transfer substrate and a display substrate to face each other, attaching a light emitting element including a metal protrusion portion bonded to the metal layer to an overcoat layer of the display substrate by moving the transfer substrate relative to the display substrate, and separating the metal protrusion portion from the light emitting element by moving the transfer substrate relative to the display substrate.
    Type: Application
    Filed: July 1, 2024
    Publication date: July 3, 2025
    Applicant: Samsung Display Co., LTD.
    Inventors: Jae Gwang UM, Tae Hee LEE, Moon Won CHANG
  • Publication number: 20250209955
    Abstract: A display device includes a display panel including a pixel, a data driver providing a data voltage to the pixel, a gate driver providing a gate signal to the pixel, and a controller controlling the data driver and the gate driver. The pixel includes a first sub-pixel including a first light emitting element, and a second sub-pixel including multiple second light emitting elements.
    Type: Application
    Filed: July 18, 2024
    Publication date: June 26, 2025
    Applicant: Samsung Display Co., LTD.
    Inventor: Jae Gwang UM
  • Publication number: 20250210584
    Abstract: In a method of manufacturing a display device, the method includes forming a first electrode on a substrate, forming an insulating layer over the first electrode, aligning a first light emitting element on the insulating layer, light-exposing the insulating layer, exposing at least a portion of the first electrode by developing the insulating layer, and bonding the first light emitting element to the at least a portion of the first electrode.
    Type: Application
    Filed: October 22, 2024
    Publication date: June 26, 2025
    Applicant: Samsung Display Co., LTD.
    Inventors: Jae Gwang UM, Byoung Yong KIM, Tae Hee LEE, Moon Won CHANG
  • Publication number: 20240120230
    Abstract: An apparatus for fabricating a display panel and a fabricating method of a display panel are provided. An apparatus for fabricating a display panel includes a loading module of a large-area fabricating substrate fabricated and separated into a plurality of display panels, a solvent application module configured to apply a metal bonding solvent onto the large-area fabricating substrate, and an element transfer module configured to transfer a plurality of light emitting elements or at least one integrated circuit onto the large-area fabricating substrate on which the metal bonding solvent is applied, and the loading module includes a groove type discharge path through which the metal bonding solvent applied by the solvent application module flows and is discharged.
    Type: Application
    Filed: July 24, 2023
    Publication date: April 11, 2024
    Inventors: Tae Hee LEE, Min Woo KIM, Sung Kook PARK, Jae Gwang UM
  • Publication number: 20240120323
    Abstract: The present disclosure relates to an apparatus for fabricating a display panel including: an attachment member having a fixing portion in a pressurization direction to which a pressurization header is fixed, an attachment driving member configured to move the attachment member and the pressurization header in the pressurization direction or a detachment direction through a fixing frame of the attachment member, a first pressure sensing module between the pressurization header and the attachment member and configured to generate first pressure detection signals according to pressure applied to the pressurization header, a gradient setting module configured to set a gradient of the pressurization header based on magnitudes of the first pressure detection signals, and a gradient control module configured to adjust gradients of the pressurization header, the attachment member, and the fixing frame according to control of the gradient setting module.
    Type: Application
    Filed: September 6, 2023
    Publication date: April 11, 2024
    Inventors: Tae Hee LEE, Sung Kook PARK, Kyung Ho KIM, Young Seok SEO, Jae Gwang UM, Sang Hyun LEE, Hyung Suk HWANG
  • Publication number: 20230411577
    Abstract: The display device includes a substrate, a thin-film transistor on the substrate and including a first electrode, a second electrode and a semiconductor layer, a first insulating layer on the thin-film transistor, an organic layer on the first insulating layer, at least one light-emitting element on the organic layer, a pixel electrode on the organic layer and in contact with a side surface of the at least one light-emitting element, a planarization layer on the side surface of the at least one light-emitting element and a common electrode on the at least one light-emitting element and the planarization layer.
    Type: Application
    Filed: February 24, 2023
    Publication date: December 21, 2023
    Inventors: Ju Won YOON, Jung Hun NOH, Ki Seong SEO, Jae Gwang UM, So Yeon YOON, Sang Hyun LEE, Hyung Il JEON
  • Patent number: 10804337
    Abstract: Disclosed is an in-cell type organic electroluminescent device. The in-cell type organic electroluminescent device according to an embodiment of the present disclosure includes at least one OLED-driving Thin-Film Transistor (OLED driving TFT) that is formed on a substrate and drives an organic light emitting device (OLED); the OLED connected to the at least one OLED driving TFT through a first contact hole; at least one touch-sensing thin-film transistor (though sensing TFT) that is simultaneously formed with the at least one OLED driving TFT on the substrate and senses touch; and an touch electrode that is connected to the at least one touch sensing TFT through a second contact hole and does not overlap with the OLED, wherein the at least one OLED driving TFT and the at least one touch sensing TFT share a gate line.
    Type: Grant
    Filed: November 21, 2017
    Date of Patent: October 13, 2020
    Assignee: UNIVERSITY-INDUSTRY COOPERATION GROUP OF KYUNG HEE UNIVERSITY
    Inventors: Jin Jang, Yuanfeng Chen, Jae Gwang Um
  • Patent number: 10396110
    Abstract: A digital radiographic detector uses an IGZO active layer in the switching element for each imaging pixel in a two-dimensional array of imaging pixels. Each imaging pixel has a photo-sensitive element and the switching element. Read-out circuits electrically connected to the two-dimensional array generate a radiographic image by reading out image data by switching on and off the switching elements. The IGZO active layer may be formed having a thickness less than about 7 nm.
    Type: Grant
    Filed: October 10, 2018
    Date of Patent: August 27, 2019
    Assignees: Carestream Health, Inc., Kyung Hee University
    Inventors: Ravi K. Mruthyunjaya, Timothy J. Tredwell, Jin Jang, Mallory Mativenga, Jae Gwang Um, Mohammad Masum Billah
  • Patent number: 10305051
    Abstract: Provided are a flexible display device and a method of manufacturing the same. More particularly, the method of manufacturing the flexible display device according to the present invention includes a step of forming a first polyimide-based layer by coating a polyimide-based solution on a carrier substrate; a step of forming an oxide thin film transistor array on the first polyimide-based layer; a step of forming a second polyimide-based layer by coating a polyimide-based solution on the oxide thin film transistor array; a step of forming an organic light emitting diode on the second polyimide-based layer; and a step of removing the carrier substrate, wherein, in the step of forming the oxide thin film transistor array, the oxide thin film transistor array is disposed between the first polyimide-based layer and the second polyimide-based layer.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: May 28, 2019
    Assignee: UNIVERSITY-INDUSTRY COOPERATION GROUP OF KYUNG HEE UNIVERSITY
    Inventors: Jin Jang, Jae Gwang Um
  • Publication number: 20190074308
    Abstract: A digital radiographic detector uses an IGZO active layer in the switching element for each imaging pixel in a two-dimensional array of imaging pixels. Each imaging pixel has a photo-sensitive element and the switching element. Read-out circuits electrically connected to the two-dimensional array generate a radiographic image by reading out image data by switching on and off the switching elements. The IGZO active layer may be formed having a thickness less than about 7 nm.
    Type: Application
    Filed: October 10, 2018
    Publication date: March 7, 2019
    Inventors: Ravi K. MRUTHYUNJAYA, Timothy J. TREDWELL, Jin JANG, Mallory MATIVENGA, Jae Gwang UM, Mohammad Masum BILLAH
  • Publication number: 20190043927
    Abstract: Disclosed is an in-cell type organic electroluminescent device. The in-cell type organic electroluminescent device according to an embodiment of the present disclosure includes at least one OLED-driving Thin-Film Transistor (OLED driving TFT) that is formed on a substrate and drives an organic light emitting device (OLED); the OLED connected to the at least one OLED driving TFT through a first contact hole; at least one touch-sensing thin-film transistor (though sensing TFT) that is simultaneously formed with the at least one OLED driving TFT on the substrate and senses touch; and an touch electrode that is connected to the at least one touch sensing TFT through a second contact hole and does not overlap with the OLED, wherein the at least one OLED driving TFT and the at least one touch sensing TFT share a gate line.
    Type: Application
    Filed: November 21, 2017
    Publication date: February 7, 2019
    Applicant: UNIVERSITY-INDUSTRY COOPERATION GROUP OF KYUNG HEE UNIVERSITY
    Inventors: Jin JANG, Yuanfeng CHEN, Jae Gwang UM
  • Publication number: 20180375042
    Abstract: Provided are a flexible display device and a method of manufacturing the same. More particularly, the method of manufacturing the flexible display device according to the present invention includes a step of forming a first polyimide-based layer by coating a polyimide-based solution on a carrier substrate; a step of forming an oxide thin film transistor array on the first polyimide-based layer; a step of forming a second polyimide-based layer by coating a polyimide-based solution on the oxide thin film transistor array; a step of forming an organic light emitting diode on the second polyimide-based layer; and a step of removing the carrier substrate, wherein, in the step of forming the oxide thin film transistor array, the oxide thin film transistor array is disposed between the first polyimide-based layer and the second polyimide-based layer.
    Type: Application
    Filed: November 29, 2016
    Publication date: December 27, 2018
    Applicant: UNIVERSITY-INDUSTRY COOPERATION GROUP OF KYUNG HEE UNIVERSITY
    Inventors: Jin JANG, Jae Gwang UM
  • Patent number: 10147749
    Abstract: A digital radiographic detector uses an IGZO active layer in the switching element for each imaging pixel in a two-dimensional array of imaging pixels. Each imaging pixel has a photo-sensitive element and the switching element. Read-out circuits electrically connected to the two-dimensional array generate a radiographic image by reading out image data by switching on and off the switching elements. The IGZO active layer may be formed having a thickness less than about 7 nm.
    Type: Grant
    Filed: April 12, 2016
    Date of Patent: December 4, 2018
    Inventors: Ravi K. Mruthyunjaya, Timothy J. Tredwell, Jin Jang, Mallory Mativenga, Jae Gwang Um, Mohammad Masum Billah
  • Publication number: 20180138219
    Abstract: A digital radiographic detector uses an IGZO active layer in the switching element for each imaging pixel in a two-dimensional array of imaging pixels. Each imaging pixel has a photo-sensitive element and the switching element. Read-out circuits electrically connected to the two-dimensional array generate a radiographic image by reading out image data by switching on and off the switching elements. The IGZO active layer may be formed having a thickness less than about 7 nm.
    Type: Application
    Filed: April 12, 2016
    Publication date: May 17, 2018
    Inventors: Ravi K. Mruthyunjaya, Timothy J. Tredwell, Jin Jang, Mallory Mativenga, Jae Gwang Um, Mohammad Masum Billah
  • Patent number: 9825058
    Abstract: An oxide semiconductor transistor used in a pixel element of a display device and a method of manufacturing the same are disclosed. The oxide semiconductor transistor used in a pixel element of a display device comprises a substrate, a first gate electrode located on the substrate, a source electrode and a drain electrode located on the first gate electrode and a second gate electrode located on the source electrode and the drain electrode. Here, the first gate electrode is electrically connected to the second gate electrode, the same voltage is applied to the first gate electrode and the second gate electrode, and a width of the second gate electrode is shorter than a length between the source electrode and the drain electrode.
    Type: Grant
    Filed: December 10, 2015
    Date of Patent: November 21, 2017
    Assignee: University-Industry Cooperation Group of Kyung Hee University
    Inventors: Jin Jang, Man Ju Seok, Jae Gwang Um, Su Hui Lee
  • Publication number: 20160093643
    Abstract: An oxide semiconductor transistor used in a pixel element of a display device and a method of manufacturing the same are disclosed. The oxide semiconductor transistor used in a pixel element of a display device comprises a substrate, a first gate electrode located on the substrate, a source electrode and a drain electrode located on the first gate electrode and a second gate electrode located on the source electrode and the drain electrode. Here, the first gate electrode is electrically connected to the second gate electrode, the same voltage is applied to the first gate electrode and the second gate electrode, and a width of the second gate electrode is shorter than a length between the source electrode and the drain electrode.
    Type: Application
    Filed: December 10, 2015
    Publication date: March 31, 2016
    Inventors: Jin Jang, Man Ju Seok, Jae Gwang Um, Su Hui Lee