Patents by Inventor Hyun-Joong Chung

Hyun-Joong Chung 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: 20240133835
    Abstract: A sensor for measuring the degradation of a fabric property is disclosed. The sensor includes a conductive track and a sacrificial material coupled to the conductive track, such that degradation of the sacrificial material results in reduction or loss of electrical conductivity of the conductive track. A method of measuring the performance degradation of a fabric, using a sensor is also provided. The method includes the step of measuring the electrical resistance of the sensor, and comparing the result to a known or empirically measured value to estimate the remaining useful life of the fabric performance.
    Type: Application
    Filed: March 3, 2022
    Publication date: April 25, 2024
    Inventors: Patricia DOLEZ, Hyun-Joong CHUNG, Chungyeon CHO
  • Patent number: 11849540
    Abstract: The development of stretchable, mechanically and electrically robust interconnects by printing an elastic, silver-based composite ink onto stretchable fabric. Such interconnects can have conductivity of 3000-4000 S/cm and are durable under cyclic stretching. In serpentine shape, the fabric-based conductor is enhanced in electrical durability. Resistance increases only ˜5 times when cyclically stretched over a thousand times from zero to 30% strain at a rate of 4% strain per second due to the ink permeating the textile structure. The textile fibers are ‘wetted’ with composite ink to form a conductive, stretchable cladding of the silver particles. The e-textile can realize a fully printed, double-sided electronic system of sensor-textile-interconnect integration. The double-sided e-textile can be used for a surface electromyography (sEMG) system to monitor muscles activities, an electroencephalography (EEG) system to record brain waves, and the like.
    Type: Grant
    Filed: April 25, 2022
    Date of Patent: December 19, 2023
    Assignee: THE GOVERNORS OF THE UNIVERSITY OF ALBERTA
    Inventors: Hyun-Joong Chung, Jana Rieger, Thanh-Giang La, Shide Qiu, Dylan Scott
  • Publication number: 20220256693
    Abstract: The development of stretchable, mechanically and electrically robust interconnects by printing an elastic, silver-based composite ink onto stretchable fabric. Such interconnects can have conductivity of 3000-4000 S/cm and are durable under cyclic stretching. In serpentine shape, the fabric-based conductor is enhanced in electrical durability. Resistance increases only ˜5 times when cyclically stretched over a thousand times from zero to 30% strain at a rate of 4% strain per second due to the ink permeating the textile structure. The textile fibers are ‘wetted’ with composite ink to form a conductive, stretchable cladding of the silver particles. The e-textile can realize a fully printed, double-sided electronic system of sensor-textile-interconnect integration. The double-sided e-textile can be used for a surface electromyography (sEMG) system to monitor muscles activities, an electroencephalography (EEG) system to record brain waves, and the like.
    Type: Application
    Filed: April 25, 2022
    Publication date: August 11, 2022
    Inventors: Hyun-Joong CHUNG, Jana RIEGER, Thanh-Giang LA, Shide QIU, Dylan SCOTT
  • Patent number: 11343910
    Abstract: The development of stretchable, mechanically and electrically robust interconnects by printing an elastic, silver-based composite ink onto stretchable fabric. Such interconnects can have conductivity of 3000-4000 S/cm and are durable under cyclic stretching. In serpentine shape, the fabric-based conductor is enhanced in electrical durability. Resistance increases only ˜5 times when cyclically stretched over a thousand times from zero to 30% strain at a rate of 4% strain per second due to the ink permeating the textile structure. The textile fibers are wetted with composite ink to form a conductive, stretchable cladding of the silver particles. The e-textile can realize a fully printed, double-sided electronic system of sensor-textile-interconnect integration. The double-sided e-textile can be used for a surface electromyography (sEMG) system to monitor muscles activities, an electroencephalography (EEG) system to record brain waves, and the like.
    Type: Grant
    Filed: June 7, 2019
    Date of Patent: May 24, 2022
    Assignee: THE GOVERNORS OF THE UNIVERSITY OF ALBERTA
    Inventors: Hyun-Joong Chung, Jana Rieger, Thanh-Giang La, Shide Qiu, Dylan Scott
  • Publication number: 20210144848
    Abstract: The development of stretchable, mechanically and electrically robust interconnects by printing an elastic, silver-based composite ink onto stretchable fabric. Such interconnects can have conductivity of 3000-4000 S/cm and are durable under cyclic stretching. In serpentine shape, the fabric-based conductor is enhanced in electrical durability. Resistance increases only ˜5 times when cyclically stretched over a thousand times from zero to 30% strain at a rate of 4% strain per second due to the ink permeating the textile structure. The textile fibers are wetted with composite ink to form a conductive, stretchable cladding of the silver particles. The e-textile can realize a fully printed, double-sided electronic system of sensor-textile-interconnect integration. The double-sided e-textile can be used for a surface electromyography (sEMG) system to monitor muscles activities, an electroencephalography (EEG) system to record brain waves, and the like.
    Type: Application
    Filed: June 7, 2019
    Publication date: May 13, 2021
    Inventors: Hyun-Joong CHUNG, Jana RIEGER, Thanh-Giang LA, Shide QIU, Dylan SCOTT
  • Patent number: 9373669
    Abstract: An organic light-emitting display device, which may be configured to prevent moisture or oxygen from penetrating the organic light-emitting display device from the outside is disclosed. An organic light-emitting display device, which is easily applied to a large display device and/or may be easily mass produced is further disclosed. Additionally disclosed is a method of manufacturing an organic light-emitting display device. An organic light-emitting display device may include, for example, a thin-film transistor (TFT) including a gate electrode, an active layer insulated from the gate electrode, source and drain electrodes insulated from the gate electrode and contacting the active layer and an insulating layer disposed between the source and drain electrodes and the active layer; and an organic light-emitting diode electrically connected to the TFT.
    Type: Grant
    Filed: July 31, 2015
    Date of Patent: June 21, 2016
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hyun-Joong Chung, Jin-Seong Park, Jong-Han Jeong, Jae-Kyeong Jeong, Yeon-Gon Mo, Min-Kyu Kim, Tae-Kyung Ahn, Hui-Won Yang, Kwang-Suk Kim, Eun-Hyun Kim, Jae-Wook Kang, Jang-Soon Im
  • Publication number: 20150340417
    Abstract: An organic light-emitting display device, which may be configured to prevent moisture or oxygen from penetrating the organic light-emitting display device from the outside is disclosed. An organic light-emitting display device, which is easily applied to a large display device and/or may be easily mass produced is further disclosed. Additionally disclosed is a method of manufacturing an organic light-emitting display device. An organic light-emitting display device may include, for example, a thin-film transistor (TFT) including a gate electrode, an active layer insulated from the gate electrode, source and drain electrodes insulated from the gate electrode and contacting the active layer and an insulating layer disposed between the source and drain electrodes and the active layer; and an organic light-emitting diode electrically connected to the TFT.
    Type: Application
    Filed: July 31, 2015
    Publication date: November 26, 2015
    Inventors: Hyun-Joong CHUNG, Jin-Seong PARK, Jong-Han JEONG, Jae-Kyeong JEONG, Yeon-Gon MO, Min-Kyu KIM, Tae-Kyung AHN, Hui-Won YANG, Kwang-Suk KIM, Eun-Hyun KIM, Jae-Wook KANG, Jang-Soon IM
  • Patent number: 9105862
    Abstract: An organic light-emitting display device, which may be configured to prevent moisture or oxygen from penetrating the organic light-emitting display device from the outside is disclosed. An organic light-emitting display device, which is easily applied to a large display device and/or may be easily mass produced is further disclosed. An organic light-emitting display device may include, for example, a thin-film transistor (TFT) including a gate electrode, an active layer insulated from the gate electrode, source and drain electrodes insulated from the gate electrode and contacting the active layer and an insulating layer disposed between the source and drain electrodes and the active layer; and an organic light-emitting diode electrically connected to the TFT. The insulating layer may include, for example, a first insulating layer contacting the active layer; and a second insulating layer formed of a metal oxide and disposed on the first insulating layer.
    Type: Grant
    Filed: August 26, 2013
    Date of Patent: August 11, 2015
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hyun-Joong Chung, Jin-Seong Park, Jong-Han Jeong, Jae-Kyeong Jeong, Yeong-Gon Mo, Min-Kyu Kim, Tae-Kyung Ahn, Hui-Won Yang, Kwang-Suk Kim, Eun-Hyun Kim, Jae-Wook Kang, Jang-Soon Im
  • Patent number: 8728862
    Abstract: A thin film transistor, a method of manufacturing the thin film transistor, and a flat panel display device including the thin film transistor. The thin film transistor includes: a gate electrode formed on a substrate; a gate insulating film formed on the gate electrode; an activation layer formed on the gate insulating film; a passivation layer including a compound semiconductor oxide, formed on the activation layer; and source and drain electrodes that contact the activation layer.
    Type: Grant
    Filed: May 2, 2012
    Date of Patent: May 20, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jae-Heung Ha, Young-Woo Song, Jong-Hyuk Lee, Jong-Han Jeong, Min-Kyu Kim, Yeon-Gon Mo, Jae-Kyeong Jeong, Hyun-Joong Chung, Kwang-Suk Kim, Hui-Won Yang, Chaun-Gi Choi
  • Patent number: 8659016
    Abstract: A thin film transistor (TFT) using an oxide semiconductor as an active layer, a method of manufacturing the TFT, and a flat panel display device having the TFT include source and drain electrodes formed on a substrate; an active layer formed of an oxide semiconductor disposed on the source and drain electrodes; a gate electrode; and an interfacial stability layer formed on at least one of top and bottom surfaces of the active layer. In the TFT, the interfacial stability layer is formed of an oxide having a band gap of 3.0 to 8.0 eV. Since the interfacial stability layer has the same characteristics as a gate insulating layer and a passivation layer, chemically high interface stability is maintained. Since the interfacial stability layer has a band gap equal to or greater than that of the active layer, charge trapping is physically prevented.
    Type: Grant
    Filed: May 8, 2013
    Date of Patent: February 25, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Min-Kyu Kim, Jong-Han Jeong, Tae-Kyung Ahn, Jae-Kyeong Jeong, Yeon-Gon Mo, Jin-Seong Park, Hyun-Joong Chung, Kwang-Suk Kim, Hui-Won Yang
  • Publication number: 20130341614
    Abstract: An organic light-emitting display device, which may be configured to prevent moisture or oxygen from penetrating the organic light-emitting display device from the outside is disclosed. An organic light-emitting display device, which is easily applied to a large display device and/or may be easily mass produced is further disclosed. Additionally disclosed is a method of manufacturing an organic light-emitting display device. An organic light-emitting display device may include, for example, a thin-film transistor (TFT) including a gate electrode, an active layer insulated from the gate electrode, source and drain electrodes insulated from the gate electrode and contacting the active layer and an insulating layer disposed between the source and drain electrodes and the active layer; and an organic light-emitting diode electrically connected to the TFT.
    Type: Application
    Filed: August 26, 2013
    Publication date: December 26, 2013
    Inventors: Hyun-Joong CHUNG, Jin-Seong PARK, Jong-Han JEONG, Jae-Kyeong JEONG, Yeon-Gon MO, Min-Kyu KIM, Tae-Kyung AHN, Hui-Won YANG, Kwang-Suk KIM, Eun-Hyun KIM, Jae-Wook KANG, Jae-Soon IM
  • Publication number: 20130277660
    Abstract: An oxide semiconductor thin film transistor and a flat panel display device incorporating the same oxide semiconductor thin film transistor. The thin film transistor includes a gate electrode formed on the substrate, a gate insulating layer formed on the substrate and covering the gate electrode, an oxide semiconductor layer formed on the gate insulating layer and covering the gate electrode, a titanium layer formed in a source region and a drain region of the oxide semiconductor layer, and source and drain electrodes respectively coupled to the source region and the drain region through the titanium layer and made of copper. The titanium layer reduces the contact resistance between the source and drain electrodes made of copper and the oxide semiconductor layer, forms a stable interface junction therebetween, and blocks a diffusion of copper.
    Type: Application
    Filed: June 20, 2013
    Publication date: October 24, 2013
    Inventors: Jin-Seong Park, Yeon-Gon Mo, Jae-Kyeong Jeong, Min-Kyu Kim, Hyun-Joong Chung, Tae-Kyung Ahn, Eun-Hyun Kim
  • Patent number: 8546175
    Abstract: Disclosed is a method of manufacturing an organic light-emitting display device. An organic light-emitting display device may include, for example, a thin-film transistor (TFT) including a gate electrode, an active layer insulated from the gate electrode, source and drain electrodes insulated from the gate electrode and contacting the active layer and an insulating layer disposed between the source and drain electrodes and the active layer; and an organic light-emitting diode electrically connected to the TFT. The insulating layer may include, for example, a first insulating layer contacting the active layer; and a second insulating layer formed of a metal oxide and disposed on the first insulating layer.
    Type: Grant
    Filed: November 15, 2012
    Date of Patent: October 1, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hyun-Joong Chung, Jin-Seong Park, Jong-Han Jeong, Jae-Kyeong Jeong, Yeon-Gon Mo, Min-Kyu Kim, Tae-Kyung Ahn, Hui-Won Yang, Kwang-Suk Kim, Eun-Hyun Kim, Jae-Wook Kang, Jae-Soon Im
  • Patent number: 8541258
    Abstract: A thin film transistor (TFT) using an oxide semiconductor as an active layer, a method of manufacturing the TFT, and a flat panel display device having the TFT include source and drain electrodes formed on a substrate; an active layer formed of an oxide semiconductor disposed on the source and drain electrodes; a gate electrode; and an interfacial stability layer formed on at least one of top and bottom surfaces of the active layer. In the TFT, the interfacial stability layer is formed of an oxide having a band gap of 3.0 to 8.0 eV. Since the interfacial stability layer has the same characteristics as a gate insulating layer and a passivation layer, chemically high interface stability is maintained. Since the interfacial stability layer has a band gap equal to or greater than that of the active layer, charge trapping is physically prevented.
    Type: Grant
    Filed: April 21, 2011
    Date of Patent: September 24, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Min-Kyu Kim, Jong-Han Jeong, Tae-Kyung Ahn, Jae-Kyeong Jeong, Yeon-Gon Mo, Jin-Seong Park, Hyun-Joong Chung, Kwang-Suk Kim, Hui-Won Yang
  • Publication number: 20130240879
    Abstract: A thin film transistor (TFT) using an oxide semiconductor as an active layer, a method of manufacturing the TFT, and a flat panel display device having the TFT include source and drain electrodes formed on a substrate; an active layer formed of an oxide semiconductor disposed on the source and drain electrodes; a gate electrode; and an interfacial stability layer formed on at least one of top and bottom surfaces of the active layer. In the TFT, the interfacial stability layer is formed of an oxide having a band gap of 3.0 to 8.0 eV. Since the interfacial stability layer has the same characteristics as a gate insulating layer and a passivation layer, chemically high interface stability is maintained. Since the interfacial stability layer has a band gap equal to or greater than that of the active layer, charge trapping is physically prevented.
    Type: Application
    Filed: May 8, 2013
    Publication date: September 19, 2013
    Applicant: Samsung Display Co., Ltd.
    Inventors: Min-Kyu KIM, Jong-Han JEONG, Tae-kyung AHN, Jae-Kyeong JEONG, Yeon-Gon MO, Jin-Seong PARK, Hyun-Joong CHUNG, Kwang-Suk KIM, Hui-Won YANG
  • Patent number: 8491955
    Abstract: A method of manufacturing an electronic apparatus including a plastic substrate, which can facilitate in separating the electronic apparatus including the plastic substrate from a stage, an electronic apparatus manufactured using the method, and an apparatus including the stage for use in the method. The method includes: preparing a stage on which a plurality of island-shaped separation lubricators are arranged; disposing the plastic substrate on the stage; forming a device on the plastic substrate; and separating the plastic substrate from the stage.
    Type: Grant
    Filed: November 17, 2009
    Date of Patent: July 23, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Tae-Woong Kim, Dong-Un Jin, Hyun-Joong Chung, Jae-Seob Lee, Yeon-Gon Mo
  • Patent number: 8466462
    Abstract: A thin film transistor (TFT) including a gate electrode, an active layer, and source and drain electrodes. The active layer includes contact regions that contact the source and drain electrodes, which are thinner than a remaining region of the active layer. The contact regions reduce the contact resistance between the active material layer and the source and drain electrodes.
    Type: Grant
    Filed: February 11, 2009
    Date of Patent: June 18, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hyun-Joong Chung, Min-Kyu Kim, Jong-Han Jeong, Yeon-Gon Mo
  • Patent number: 8436342
    Abstract: Disclosed is an organic light emitting display device and a method of manufacturing the same. The organic light emitting display device includes the thin film transistor of the drive unit that has the activation layer formed in a structure where the first oxide semiconductor layer and the second oxide semiconductor layer are stacked, the thin film transistor of the pixel unit that has the activation layer formed of the second oxide semiconductor layer, and the organic light emitting diode coupled to the thin film transistor of the pixel unit. The thin film transistor of the drive unit has channel formed on the first oxide semiconductor layer having a higher carrier concentration than the second oxide semiconductor layer, having a high charge mobility, and the thin film transistor of the pixel unit has a channel formed on the second oxide semiconductor layer, having a stable and uniform functional property.
    Type: Grant
    Filed: January 8, 2010
    Date of Patent: May 7, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jin-Seong Park, Yeon-Gon Mo, Jae-Kyeong Jeong, Min-Kyu Kim, Hyun-Joong Chung, Tae-Kyung Ahn
  • Patent number: 8330150
    Abstract: An organic light-emitting display device, which may be configured to prevent moisture or oxygen from penetrating the organic light-emitting display device from the outside is disclosed. An organic light-emitting display device, which is easily applied to a large display device and/or may be easily mass produced is further disclosed. Additionally disclosed is a method of manufacturing an organic light-emitting display device. An organic light-emitting display device may include, for example, a thin-film transistor (TFT) including a gate electrode, an active layer insulated from the gate electrode, source and drain electrodes insulated from the gate electrode and contacting the active layer and an insulating layer disposed between the source and drain electrodes and the active layer; and an organic light-emitting diode electrically connected to the TFT.
    Type: Grant
    Filed: July 1, 2010
    Date of Patent: December 11, 2012
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hyun-Joong Chung, Jin-Seong Park, Jong-Han Jeong, Jae-Kyeong Jeong, Yeong-Gon Mo, Min-Kyu Kim, Tae-Kyung Ahn, Hui-Won Yang, Kwang-Suk Kim, Eun-Hyun Kim, Jae-Wook Kang, Jae-Soon Im
  • Patent number: 8288768
    Abstract: A thin film transistor using an oxide semiconductor as an active layer, and its method of manufacture. The thin film transistor includes: a substrate; an active layer formed of an oxide semiconductor; a gate insulating layer formed of a dielectric on the active layer, the dielectric having an etching selectivity of 20 to 100:1 with respect to the oxide semiconductor; a gate electrode formed on the gate insulating layer; an insulating layer formed on the substrate including the gate electrode and having contact holes to expose the active layer; and source and drain electrodes connected to the active layer through the contact holes. Since the source and drain electrodes are not overlapped with the gate electrode, parasitic capacitance between the source and drain electrodes and the gate electrode is minimized. Since the gate insulating layer is formed of dielectric having a high etching selectivity with respect to oxide semiconductor, the active layer is not deteriorated.
    Type: Grant
    Filed: January 20, 2010
    Date of Patent: October 16, 2012
    Assignee: Samsung Display Co., Ltd.
    Inventors: Min-Kyu Kim, Jin-Seong Park, Tae-Kyung Ahn, Hyun-Joong Chung