Patents by Inventor HongRak Choi

HongRak Choi 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: 20240188331
    Abstract: A display panel includes a substrate, a first storage capacitor electrode disposed on the substrate, a buffer layer disposed on the first storage capacitor electrode, an active layer disposed on the buffer layer and including a first area, a second area, and a channel area disposed between the first area and the second area, a gate insulation film disposed on the active layer, a gate electrode disposed on the gate insulation film and overlapping with the channel area, an inter-layer insulation film disposed on the gate electrode, and a metal layer disposed on the inter-layer insulation film, wherein the first area and the second area of the active layer are conductive areas, and wherein a conductive auxiliary layer overlapping with at least a portion of each of the first area and the second area and not overlapping with the channel area is included on the substrate, thereby mitigating the step in the area where the storage capacitor electrodes are disposed to prevent a short circuit.
    Type: Application
    Filed: October 4, 2023
    Publication date: June 6, 2024
    Applicant: LG Display Co., Ltd.
    Inventors: HongRak CHOI, JuHeyuck BAECK, Dohyung LEE, Younghyun KO, ChanYong JEONG
  • Publication number: 20240162239
    Abstract: Discussed are a display panel and a display device including thin film transistors having high reliability and a high current producing characteristic. In one example, the display panel includes a first active layer disposed on a substrate and including a first channel region, a second active layer overlapping a portion of the first active layer and including a second channel region not overlapping the first channel region of the first active layer, first and second electrodes disposed in respective portions of the first and second active layers, respectively, and spaced apart from each other, a gate insulating layer disposed in respective portions of upper surfaces of the first and second active layers, and a third electrode disposed on the gate insulating layer.
    Type: Application
    Filed: October 18, 2023
    Publication date: May 16, 2024
    Applicant: LG Display Co., Ltd.
    Inventors: Dohyung LEE, ChanYong JEONG, JuHeyuck BAECK, Younghyun KO, HongRak CHOI
  • Publication number: 20240099063
    Abstract: A display panel and a display device both include a first active layer disposed on a substrate and including a channel area, a first area positioned on a first side of the channel area, and a second area positioned on a second side of the channel area, a first conductor on the first area, a second conductor on the second area, and a first auxiliary electrode on the first conductor, wherein an area where the first auxiliary electrode is disposed includes a repair area, thereby facilitating to repair a subpixel while mitigating or minimizing instantaneous ghosting on panel.
    Type: Application
    Filed: September 1, 2023
    Publication date: March 21, 2024
    Applicant: LG DISPLAY CO., LTD.
    Inventors: Dohyung LEE, JuHeyuck BAECK, Jiyong NOH, HongRak CHOI, ChanYong JEONG
  • Patent number: 11705460
    Abstract: A panel comprises a substrate; a transistor disposed on the substrate and including: a source electrode, a drain electrode, a gate electrode, a gate insulation layer, an active layer, an auxiliary source electrode configured to electrically connect one end of the active layer to the source electrode, and an auxiliary drain electrode configured to electrically connect an other end of the active layer to the drain electrode; and a capacitor disposed on the substrate and including a first plate and a second plate. The first plate of the capacitor is made of a same material as the auxiliary source electrode and the auxiliary drain electrode.
    Type: Grant
    Filed: February 14, 2022
    Date of Patent: July 18, 2023
    Assignee: LG Display Co., Ltd.
    Inventors: Kwanghwan Ji, HongRak Choi, Jeyong Jeon, Jaeyoon Park
  • Patent number: 11676970
    Abstract: A panel comprises a substrate; a transistor disposed on the substrate and including: a source electrode, a drain electrode, a gate electrode, a gate insulation layer, an active layer, an auxiliary source electrode configured to electrically connect one end of the active layer to the source electrode, and an auxiliary drain electrode configured to electrically connect an other end of the active layer to the drain electrode; and a capacitor disposed on the substrate and including a first plate and a second plate. The first plate of the capacitor is made of a same material as the auxiliary source electrode and the auxiliary drain electrode.
    Type: Grant
    Filed: February 14, 2022
    Date of Patent: June 13, 2023
    Assignee: LG Display Co., Ltd.
    Inventors: Kwanghwan Ji, HongRak Choi, Jeyong Jeon, Jaeyoon Park
  • Publication number: 20230146562
    Abstract: A thin film transistor and a display device comprising the same are provided. The thin film transistor comprises a first gate electrode and a second gate electrode, which are spaced apart from each other to overlap each other, and an active layer disposed between the first gate electrode and the second gate electrode, including a first active layer and a second active layer, wherein the active layer includes a channel portion, a first connection portion that is in contact with one side of the channel portion, and a second connection portion that is in contact with the other side of the channel portion. The channel portion includes a first channel portion and a second channel portion, which are disposed in parallel.
    Type: Application
    Filed: October 31, 2022
    Publication date: May 11, 2023
    Inventors: Dohyung Lee, HongRak Choi, ChanYong Jeong
  • Publication number: 20230145843
    Abstract: A display device includes a main active layer positioned on a substrate includes a channel area, a first conductorized area positioned on a first side of the channel area, and a second conductorized area positioned on a second side of the channel area, a sacrificial active layer is positioned on the main active layer, a gate insulating film is positioned on the sacrificial active layer, a first electrode is positioned on the sacrificial active layer, a portion of the first electrode overlaps the first conductorized area of the main active layer, a second electrode is positioned on the sacrificial active layer, a portion of the second electrode overlaps the second conductorized area of the main active layer, and a third electrode positioned on the gate insulating film overlaps the channel area of the main active layer.
    Type: Application
    Filed: July 28, 2022
    Publication date: May 11, 2023
    Applicant: LG DISPLAY CO., LTD.
    Inventors: HongRak CHOI, Dohyung LEE, ChanYong JEONG, KyungChul OK
  • Publication number: 20230127842
    Abstract: A thin film transistor substrate and a display device including the same are provided. The thin film transistor substrate includes a first thin film transistor and a second thin film transistor on a base substrate, wherein the first thin film transistor includes a first active layer on the base substrate, a first conductive material layer on the first active layer, and a first gate electrode spaced apart from the first active layer and at least partially overlapped with the first active layer, and the second thin film transistor includes a second active layer on the base substrate, a second conductive material layer on the second active layer, and a second gate electrode spaced apart from the second active layer and at least partially overlapped with the second active layer.
    Type: Application
    Filed: October 21, 2022
    Publication date: April 27, 2023
    Applicant: LG Display Co., Ltd.
    Inventors: Min-Gu KANG, Younghyun KO, HongRak CHOI
  • Publication number: 20230110764
    Abstract: A thin film transistor, a fabricating method of the thin film transistor and a display device including the thin film transistor are provided, in which the thin film transistor includes a reducing pattern on a substrate, an active layer that is in contact with the reducing pattern, and a gate electrode at least partially overlapped with the active layer, wherein the active layer includes a channel portion, a first conductorization portion connected to one side of the channel portion, and a second conductorization portion connected to the other side of the channel portion, and the channel portion overlaps the gate electrode and does not overlap the reducing pattern.
    Type: Application
    Filed: October 10, 2022
    Publication date: April 13, 2023
    Applicant: LG Display Co., Ltd.
    Inventors: ChanYong JEONG, KyungChul OK, Dohyung LEE, HongRak CHOI
  • Publication number: 20220173130
    Abstract: A panel comprises a substrate; a transistor disposed on the substrate and including: a source electrode, a drain electrode, a gate electrode, a gate insulation layer, an active layer, an auxiliary source electrode configured to electrically connect one end of the active layer to the source electrode, and an auxiliary drain electrode configured to electrically connect an other end of the active layer to the drain electrode; and a capacitor disposed on the substrate and including a first plate and a second plate. The first plate of the capacitor is made of a same material as the auxiliary source electrode and the auxiliary drain electrode.
    Type: Application
    Filed: February 14, 2022
    Publication date: June 2, 2022
    Applicant: LG Display Co., Ltd.
    Inventors: Kwanghwan JI, HongRak CHOI, Jeyong JEON, Jaeyoon PARK
  • Patent number: 11276710
    Abstract: A panel comprises a substrate; a transistor disposed on the substrate and including: a source electrode, a drain electrode, a gate electrode, a gate insulation layer, an active layer, an auxiliary source electrode configured to electrically connect one end of the active layer to the source electrode, and an auxiliary drain electrode configured to electrically connect an other end of the active layer to the drain electrode; and a capacitor disposed on the substrate and including a first plate and a second plate. The first plate of the capacitor is made of a same material as the auxiliary source electrode and the auxiliary drain electrode.
    Type: Grant
    Filed: October 21, 2019
    Date of Patent: March 15, 2022
    Assignee: LG Display Co., Ltd.
    Inventors: Kwanghwan Ji, HongRak Choi, Jeyong Jeon, Jaeyoon Park
  • Patent number: 10741126
    Abstract: Disclosed are a transistor assembly, an organic light emitting display panel including the same, and an organic light emitting display device including the organic light emitting display panel, in which a first electrode of a switching transistor is used as a gate of a driving transistor.
    Type: Grant
    Filed: November 30, 2017
    Date of Patent: August 11, 2020
    Assignee: LG DISPLAY CO., LTD.
    Inventors: HongRak Choi, SeHee Park, PilSang Yun, HyungJoon Koo, Kwanghwan Ji, Jaeyoon Park
  • Publication number: 20200144304
    Abstract: A panel comprises a substrate; a transistor disposed on the substrate and including: a source electrode, a drain electrode, a gate electrode, a gate insulation layer, an active layer, an auxiliary source electrode configured to electrically connect one end of the active layer to the source electrode, and an auxiliary drain electrode configured to electrically connect an other end of the active layer to the drain electrode; and a capacitor disposed on the substrate and including a first plate and a second plate. The first plate of the capacitor is made of a same material as the auxiliary source electrode and the auxiliary drain electrode.
    Type: Application
    Filed: October 21, 2019
    Publication date: May 7, 2020
    Applicant: LG Display Co., Ltd.
    Inventors: Kwanghwan JI, HongRak CHOI, Jeyong JEON, Jaeyoon PARK
  • Patent number: 10290658
    Abstract: Disclosed is a thin film transistor substrate which facilitates to realize a bottom gate structure where a gate electrode is disposed below an active layer, and to increase an area for a storage capacitor, and a display device including the same, wherein the thin film transistor substrate may include a light shielding layer, a buffer layer for covering the light shielding layer, and a driving transistor prepared on the buffer layer while being overlapped with the light shielding layer, and provided to supply a driving current to an organic light emitting device.
    Type: Grant
    Filed: November 30, 2017
    Date of Patent: May 14, 2019
    Assignee: LG Display Co., Ltd.
    Inventors: HyungJoon Koo, SeHee Park, Kwanghwan Ji, PilSang Yun, Jaeyoon Park, HongRak Choi
  • Patent number: 10236310
    Abstract: Disclosed are a transistor substrate, an organic light emitting display panel including the same, a method of manufacturing the transistor substrate, and an organic light emitting display device including the organic light emitting display panel, in which a driving transistor and a switching transistor are provided and each include an oxide semiconductor of which both ends are covered by an insulation layer, and a gate of the driving transistor and a gate of the switching transistor are provided on different layers.
    Type: Grant
    Filed: November 28, 2017
    Date of Patent: March 19, 2019
    Assignee: LG Display Co., Ltd.
    Inventors: SeHee Park, HongRak Choi, PilSang Yun, HyungJoon Koo, Kwanghwan Ji, Jaeyoon Park
  • Publication number: 20180175077
    Abstract: Disclosed is a thin film transistor substrate which facilitates to realize a bottom gate structure where a gate electrode is disposed below an active layer, and to increase an area for a storage capacitor, and a display device including the same, wherein the thin film transistor substrate may include a light shielding layer, a buffer layer for covering the light shielding layer, and a driving transistor prepared on the buffer layer while being overlapped with the light shielding layer, and provided to supply a driving current to an organic light emitting device.
    Type: Application
    Filed: November 30, 2017
    Publication date: June 21, 2018
    Inventors: HyungJoon Koo, SeHee Park, Kwanghwan Ji, PilSang Yun, Jaeyoon Park, HongRak Choi
  • Publication number: 20180151114
    Abstract: Disclosed are a transistor assembly, an organic light emitting display panel including the same, and an organic light emitting display device including the organic light emitting display panel, in which a first electrode of a switching transistor is used as a gate of a driving transistor.
    Type: Application
    Filed: November 30, 2017
    Publication date: May 31, 2018
    Inventors: HongRak Choi, SeHee Park, PilSang Yun, HyungJoon Koo, Kwanghwan Ji, Jaeyoon Park
  • Publication number: 20180151606
    Abstract: Disclosed are a transistor substrate, an organic light emitting display panel including the same, a method of manufacturing the transistor substrate, and an organic light emitting display device including the organic light emitting display panel, in which a driving transistor and a switching transistor are provided and each include an oxide semiconductor of which both ends are covered by an insulation layer, and a gate of the driving transistor and a gate of the switching transistor are provided on different layers.
    Type: Application
    Filed: November 28, 2017
    Publication date: May 31, 2018
    Applicant: LG Display Co., Ltd.
    Inventors: SeHee PARK, HongRak CHOI, PilSang YUN, HyungJoon KOO, Kwanghwan JI, Jaeyoon PARK