Patents by Inventor Hyuk JI

Hyuk JI 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).

  • Patent number: 12342624
    Abstract: A display apparatus includes an oxide semiconductor pattern disposed on a device substrate and including a channel region disposed between a source region and a drain region, a gate electrode overlapping the channel region of the oxide semiconductor pattern and having a structure in which a first hydrogen barrier layer and a gate conductive layer are stacked, and a gate insulating film disposed between the oxide semiconductor pattern and the gate electrode to expose the source region and the drain region of the oxide semiconductor pattern. The gate electrode exposes a portion of the gate insulating film that is adjacent to the source region and a portion of the gate insulating film that is adjacent to the drain region.
    Type: Grant
    Filed: February 27, 2023
    Date of Patent: June 24, 2025
    Assignee: LG Display Co., Ltd.
    Inventors: So-Young Noh, Ki-Tae Kim, Kyeong-Ju Moon, Hyuk Ji, Jin-Kyu Roh, Jung-Doo Jin, Kye-Chul Choi, Dong-Yup Kim, Chan-Ho Kim
  • Patent number: 12324239
    Abstract: A display apparatus can include a buffer layer on a flexible substrate; a first thin film transistor on the buffer layer including a first semiconductor pattern, a first gate electrode, a first source electrode and a first drain electrode, a second thin film transistor including a second semiconductor pattern, a second gate electrode, a second source electrode and a second drain electrode, and a passivation layer on the first and the second thin film transistors. Also, the display apparatus includes a planarization layer, a light-emitting device including a first electrode, a light-emitting layer and a second electrode on the planarization layer, and an encapsulating element on the light-emitting device. Also, the light-emitting device is electrically connected to the first thin film transistor, the first semiconductor pattern includes silicon, and the second semiconductor pattern includes an oxide semiconductor pattern, and the second gate electrode includes lower and upper electrodes.
    Type: Grant
    Filed: December 26, 2023
    Date of Patent: June 3, 2025
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Ki-Tae Kim, So-Young Noh, Ui-Jin Chung, Kyeong-Ju Moon, Hyuk Ji
  • Publication number: 20250160081
    Abstract: An embodiment discloses a display device including an insulating layer disposed on a substrate, first electrodes and contact electrodes disposed on the insulating layer, a plurality of light emitting devices disposed on the first electrodes, a second electrode disposed on the light emitting devices; and a passivation layer covering the first electrode, and a first opening hole exposing a portion of the upper surface of the first electrode.
    Type: Application
    Filed: September 10, 2024
    Publication date: May 15, 2025
    Inventors: Hyuk JI, Sang Gil KIM
  • Publication number: 20250022960
    Abstract: Provided are a display device and a method for manufacturing the same. The display device includes: a connection source electrode and a connection drain electrode connected to a first source electrode a the first drain electrode, respectively by penetrating an isolation insulating layer and a second interlayer dielectric layer to enhance a characteristic of an element and reliability of the display device.
    Type: Application
    Filed: September 26, 2024
    Publication date: January 16, 2025
    Inventors: SoYoung Noh, YoungJang Lee, HyoJin Kim, Hyuk Ji
  • Publication number: 20250015190
    Abstract: Provided are a display device and a method for manufacturing the same. The display device includes: a connection source electrode and a connection drain electrode connected to a first source electrode a the first drain electrode, respectively by penetrating an isolation insulating layer and a second interlayer dielectric layer to enhance a characteristic of an element and reliability of the display device.
    Type: Application
    Filed: September 26, 2024
    Publication date: January 9, 2025
    Inventors: SoYoung Noh, YoungJang Lee, HyoJin Kim, Hyuk Ji
  • Publication number: 20240381705
    Abstract: A display apparatus includes a first TFT in a display area including a first semiconductor pattern including a polysilicon, a first gate electrode overlapping with the first semiconductor pattern under conditions that a first gate insulating layer is interposed, and first source and drain electrodes connected to the first semiconductor pattern, a second TFT in the display area including a second semiconductor pattern including a first oxide semiconductor, a second gate electrode overlapping with the second semiconductor pattern under conditions that second and third gate insulating layers are interposed, second source and drain electrodes connected to the second semiconductor pattern, and a third TFT in a non-display area including a third semiconductor pattern including a second oxide semiconductor, a third gate electrode overlapping with the third semiconductor pattern under conditions that the third gate insulating layer is interposed, and third source and drain electrodes connected to the third semiconduc
    Type: Application
    Filed: July 22, 2024
    Publication date: November 14, 2024
    Inventors: Kyeong-Ju Moon, So-Young Noh, Ki-Tae Kim, Hyuk Ji
  • Patent number: 12132114
    Abstract: Provided are a display device and a method for manufacturing the same. The display device includes: a connection source electrode and a connection drain electrode connected to a first source electrode a the first drain electrode, respectively by penetrating an isolation insulating layer and a second interlayer dielectric layer to enhance a characteristic of an element and reliability of the display device.
    Type: Grant
    Filed: March 8, 2022
    Date of Patent: October 29, 2024
    Assignee: LG Display Co., Ltd.
    Inventors: SoYoung Noh, YoungJang Lee, HyoJin Kim, Hyuk Ji
  • Patent number: 12094978
    Abstract: An oxide semiconductor thin film transistor and a method of forming the oxide semiconductor thin film transistor are provided. The oxide semiconductor thin film transistor can include a semiconductor layer including a channel region, a source region and a drain region; a first gate insulating layer on the semiconductor layer; a gate electrode on the first gate insulating layer; a second gate insulating layer on the gate electrode; an auxiliary electrode on the second gate insulating layer; an interlayer insulating layer on the auxiliary electrode; and a source electrode and a drain electrode on the interlayer insulating layer, wherein the source region and the drain region being disposed at both sides of the channel region, wherein the gate electrode overlapping with the channel region, and the auxiliary electrode overlapping with the gate electrode.
    Type: Grant
    Filed: April 1, 2021
    Date of Patent: September 17, 2024
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Hyuk Ji, Jin Chae Jeon, Jae Hyun Kim, Sun Young Choi, Mi Jin Jeong
  • Publication number: 20240298490
    Abstract: Discussed is display apparatus including a substrate including a display area and a non-display area adjacent to the display area, a first thin film transistor disposed on the display area, a first semiconductor pattern of the first thin film transistor including an oxide semiconductor, a second thin film transistor disposed on the display area, a second semiconductor pattern of the second thin film transistor including a material different from the first semiconductor pattern, and a first conductive line disposed on the non-display area, a first portion of the first conductive line having a round shape.
    Type: Application
    Filed: May 14, 2024
    Publication date: September 5, 2024
    Applicant: LG Display Co., Ltd.
    Inventors: Kyeong-Ju MOON, So-Young NOH, Ki-Tae KIM, Hyuk JI
  • Patent number: 12075661
    Abstract: A display apparatus includes a first TFT in a display area including a first semiconductor pattern including a polysilicon, a first gate electrode overlapping with the first semiconductor pattern under conditions that a first gate insulating layer is interposed, and first source and drain electrodes connected to the first semiconductor pattern, a second TFT in the display area including a second semiconductor pattern including a first oxide semiconductor, a second gate electrode overlapping with the second semiconductor pattern under conditions that second and third gate insulating layers are interposed, second source and drain electrodes connected to the second semiconductor pattern, and a third TFT in a non-display area including a third semiconductor pattern including a second oxide semiconductor, a third gate electrode overlapping with the third semiconductor pattern under conditions that the third gate insulating layer is interposed, and third source and drain electrodes connected to the third semiconduc
    Type: Grant
    Filed: January 18, 2023
    Date of Patent: August 27, 2024
    Assignee: LG Display Co., Ltd.
    Inventors: Kyeong-Ju Moon, So-Young Noh, Ki-Tae Kim, Hyuk Ji
  • Patent number: 12022704
    Abstract: A display apparatus can include a substrate including a display area and a non-display area adjacent to the display area, a first thin film transistor in the display area, and a second thin film transistor in the display area. The first thin film transistor can include a first semiconductor pattern on the substrate, a first gate electrode overlapping the first semiconductor pattern, and a first source electrode and a first drain electrode both connected to the first semiconductor pattern. The second thin film transistor can include a second semiconductor pattern, a second gate electrode overlapping the second semiconductor pattern, a second source electrode connected to the second semiconductor pattern, and a second drain electrode connected to the second semiconductor pattern. The display apparatus can further include a conductive pattern between the display area and the second semiconductor pattern.
    Type: Grant
    Filed: February 3, 2023
    Date of Patent: June 25, 2024
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Kyeong-Ju Moon, So-Young Noh, Ki-Tae Kim, Hyuk Ji
  • Publication number: 20240128270
    Abstract: A display apparatus can include a buffer layer on a flexible substrate; a first thin film transistor on the buffer layer including a first semiconductor pattern, a first gate electrode, a first source electrode and a first drain electrode, a second thin film transistor including a second semiconductor pattern, a second gate electrode, a second source electrode and a second drain electrode, and a passivation layer on the first and the second thin film transistors. Also, the display apparatus includes a planarization layer, a light-emitting device including a first electrode, a light-emitting layer and a second electrode on the planarization layer, and an encapsulating element on the light-emitting device. Also, the light-emitting device is electrically connected to the first thin film transistor, the first semiconductor pattern includes silicon, and the second semiconductor pattern includes an oxide semiconductor pattern, and the second gate electrode includes lower and upper electrodes.
    Type: Application
    Filed: December 26, 2023
    Publication date: April 18, 2024
    Applicant: LG Display Co., Ltd.
    Inventors: Ki-Tae KIM, So-Young NOH, Ui-Jin CHUNG, Kyeong-Ju MOON, Hyuk JI
  • Publication number: 20240128423
    Abstract: A display apparatus can include a flexible substrate including a penetrating hole, a first thin film transistor including a first semiconductor layer, a second thin film transistor including a second semiconductor layer, and a first planarization layer on the first and second thin film transistors. The display apparatus can include a connection electrode on the first planarization layer electrically connected to the first or second thin film transistor, a second planarization layer on the first planarization layer, a first electrode on the second planarization layer electrically connected to the connection electrode, and a bank layer on the second planarization layer exposing a portion of the first electrode. The display apparatus includes a light-emitting layer on the portion of the first electrode exposed by the bank layer, the light-emitting layer including an emission material layer between first and second organic layers, and a second electrode on the light-emitting layer.
    Type: Application
    Filed: December 22, 2023
    Publication date: April 18, 2024
    Applicant: LG Display Co., Ltd.
    Inventors: So-Young NOH, So-Yeon JE, Ki-Tae KIM, Kyeong-Ju MOON, Hyuk JI
  • Patent number: 11894504
    Abstract: A display apparatus is provided. The display apparatus can include a substrate hole penetrating a device substrate, light-emitting devices spaced away from the substrate hole, and at least one separating device between the substrate hole and the light-emitting devices. Each of the light-emitting devices can include a light-emitting layer between a first electrode and a second electrode. The separating device can surround the substrate hole. The separating device can include at least one under-cut structure. The under-cut structure can include a depth and a length, which are larger than a thickness of the light-emitting layer. Thus, in the display apparatus, the damage of the light-emitting devices due to external moisture permeating through the substrate hole can be prevented.
    Type: Grant
    Filed: July 30, 2020
    Date of Patent: February 6, 2024
    Assignee: LG DISPLAY CO., LTD.
    Inventors: So-Young Noh, So-Yeon Je, Ki-Tae Kim, Kyeong-Ju Moon, Hyuk Ji
  • Patent number: 11894384
    Abstract: A display apparatus can include a driving circuit on a device substrate, the driving circuit including a first thin film transistor and a second thin film transistor, a first insulating layer on the first thin film transistor and the second thin film transistor of the driving circuit, a second insulating layer on the first insulating layer, and a light-emitting device on the second insulating layer, the light-emitting device being electrically connected to the second thin film transistor of the driving circuit. Each of the first thin film transistor and the second thin film transistor includes an oxide semiconductor pattern and a gate electrode overlapping a portion of the oxide semiconductor pattern. The gate electrode has a stacked structure of a first hydrogen barrier layer and a low-resistance electrode.
    Type: Grant
    Filed: July 28, 2022
    Date of Patent: February 6, 2024
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Ki-Tae Kim, So-Young Noh, Ui-Jin Chung, Kyeong-Ju Moon, Hyuk Ji
  • Patent number: 11837627
    Abstract: The present disclosure provides a display apparatus, a display panel and a method for manufacturing the same. The display panel includes a substrate including a display area including a plurality of sub-pixels, and a gate driving area including a gate driving circuit, a first buffer layer contacting the substrate in the gate driving area, a second thin film transistor disposed in the gate driving area while including a second semiconductor layer made of a second semiconductor, a second buffer layer disposed at a first opening exposing the substrate in the display area while contacting the substrate, and a first thin film transistor disposed at the first opening in the display area while including a first semiconductor layer made of a first semiconductor different from the second semiconductor.
    Type: Grant
    Filed: December 21, 2020
    Date of Patent: December 5, 2023
    Assignee: LG Display Co., Ltd.
    Inventors: Ki-Tae Kim, So-Young Noh, Kyeong-Ju Moon, Hyuk Ji
  • Publication number: 20230207570
    Abstract: A display apparatus includes an oxide semiconductor pattern disposed on a device substrate and including a channel region disposed between a source region and a drain region, a gate electrode overlapping the channel region of the oxide semiconductor pattern and having a structure in which a first hydrogen barrier layer and a gate conductive layer are stacked, and a gate insulating film disposed between the oxide semiconductor pattern and the gate electrode to expose the source region and the drain region of the oxide semiconductor pattern. The gate electrode exposes a portion of the gate insulating film that is adjacent to the source region and a portion of the gate insulating film that is adjacent to the drain region.
    Type: Application
    Filed: February 27, 2023
    Publication date: June 29, 2023
    Inventors: So-Young Noh, Ki-Tae Kim, Kyeong-Ju Moon, Hyuk Ji, Jin-Kyu Roh, Jung-Doo Jin, Kye-Chul Choi, Dong-Yup Kim, Chan-Ho Kim
  • Publication number: 20230189591
    Abstract: A display apparatus can include a substrate including a display area and a non-display area adjacent to the display area, a first thin film transistor in the display area, and a second thin film transistor in the display area. The first thin film transistor can include a first semiconductor pattern on the substrate, a first gate electrode overlapping the first semiconductor pattern, and a first source electrode and a first drain electrode both connected to the first semiconductor pattern. The second thin film transistor can include a second semiconductor pattern, a second gate electrode overlapping the second semiconductor pattern, a second source electrode connected to the second semiconductor pattern, and a second drain electrode connected to the second semiconductor pattern. The display apparatus can further include a conductive pattern between the display area and the second semiconductor pattern.
    Type: Application
    Filed: February 3, 2023
    Publication date: June 15, 2023
    Applicant: LG Display Co., Ltd.
    Inventors: Kyeong-Ju MOON, So-Young NOH, Ki-Tae KIM, Hyuk JI
  • Publication number: 20230157089
    Abstract: A display apparatus includes a first TFT in a display area including a first semiconductor pattern including a polysilicon, a first gate electrode overlapping with the first semiconductor pattern under conditions that a first gate insulating layer is interposed, and first source and drain electrodes connected to the first semiconductor pattern, a second TFT in the display area including a second semiconductor pattern including a first oxide semiconductor, a second gate electrode overlapping with the second semiconductor pattern under conditions that second and third gate insulating layers are interposed, second source and drain electrodes connected to the second semiconductor pattern, and a third TFT in a non-display area including a third semiconductor pattern including a second oxide semiconductor, a third gate electrode overlapping with the third semiconductor pattern under conditions that the third gate insulating layer is interposed, and third source and drain electrodes connected to the third semiconduc
    Type: Application
    Filed: January 18, 2023
    Publication date: May 18, 2023
    Inventors: Kyeong-Ju Moon, So-Young Noh, Ki-Tae Kim, Hyuk Ji
  • Patent number: 11616082
    Abstract: A display apparatus includes an oxide semiconductor pattern disposed on a device substrate and including a channel region disposed between a source region and a drain region, a gate electrode overlapping the channel region of the oxide semiconductor pattern and having a structure in which a first hydrogen barrier layer and a gate conductive layer are stacked, and a gate insulating film disposed between the oxide semiconductor pattern and the gate electrode to expose the source region and the drain region of the oxide semiconductor pattern. The gate electrode exposes a portion of the gate insulating film that is adjacent to the source region and a portion of the gate insulating film that is adjacent to the drain region.
    Type: Grant
    Filed: July 3, 2020
    Date of Patent: March 28, 2023
    Assignee: LG Display Co., Ltd.
    Inventors: So-Young Noh, Ki-Tae Kim, Kyeong-Ju Moon, Hyuk Ji, Jin-Kyu Roh, Jung-Doo Jin, Kye-Chul Choi, Dong-Yup Kim, Chan-Ho Kim