Patents by Inventor Myounggeun Cha

Myounggeun Cha 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: 20240334740
    Abstract: Provided are a display panel and an electronic apparatus including the display panel. The display panel includes a substrate including a polymer resin; first and second pixel circuits each including a thin-film transistor, a first light-emitting diode connected to the first pixel circuit and located in a first display area; a second light-emitting diode connected to the second pixel circuit and located in a sub-display area of a second display area, a bottom metal layer in the second display area and between the substrate and the second pixel circuit; and a protective layer between the substrate and the bottom metal layer and corresponding to the first and second display areas, wherein the bottom metal layer includes a first opening in a transmissive area, and the protective layer includes a second opening in the transmissive area and overlapping the first opening of the bottom metal layer.
    Type: Application
    Filed: June 11, 2024
    Publication date: October 3, 2024
    Inventors: Myounggeun Cha, Sanggun Choi, Jiyeong Shin, Kiseok Choi
  • Publication number: 20240324349
    Abstract: A display apparatus includes a first transistor including a first semiconductor layer including a silicon semiconductor and a first gate electrode below the first semiconductor layer, where the first transistor controls a magnitude of a driving current flowing to a display element, a data line which transmits a data voltage, a second transistor including a second semiconductor layer including an oxide semiconductor, where the second transistor connects the data line to the first transistor in response to a scan signal, and a first capacitor including a first electrode and a second electrode, where the first electrode is disposed on the first semiconductor layer, and the second electrode at least partially overlaps the first electrode.
    Type: Application
    Filed: December 8, 2023
    Publication date: September 26, 2024
    Inventors: Myounggeun CHA, Sanggun CHOI, Keunwoo KIM
  • Publication number: 20240284705
    Abstract: A display apparatus includes: a first substrate including a polymer resin; a first barrier layer on the first substrate and including a portion doped with ions, wherein the portion includes an upper surface of the first barrier layer; a second substrate on the upper surface of the first barrier layer and including a polymer resin; a buffer layer on the second substrate; a first thin-film transistor on the buffer layer; and a light-emitting diode electrically connected to the first thin-film transistor.
    Type: Application
    Filed: October 13, 2023
    Publication date: August 22, 2024
    Inventors: Kiseok Choi, Myounggeun Cha, Jongjun Baek, Heekyun Shin, Yonghoon Yang
  • Patent number: 12048196
    Abstract: Provided are a display panel and an electronic apparatus including the display panel. The display panel includes a substrate including a polymer resin; first and second pixel circuits each including a thin-film transistor, a first light-emitting diode connected to the first pixel circuit and located in a first display area; a second light-emitting diode connected to the second pixel circuit and located in a sub-display area of a second display area, a bottom metal layer in the second display area and between the substrate and the second pixel circuit; and a protective layer between the substrate and the bottom metal layer and corresponding to the first and second display areas, wherein the bottom metal layer includes a first opening in a transmissive area, and the protective layer includes a second opening in the transmissive area and overlapping the first opening of the bottom metal layer.
    Type: Grant
    Filed: December 29, 2021
    Date of Patent: July 23, 2024
    Assignee: Samsung Display Co., Ltd.
    Inventors: Myounggeun Cha, Sanggun Choi, Jiyeong Shin, Kiseok Choi
  • Publication number: 20240162404
    Abstract: A display device is disclosed that includes a substrate, a display portion, a conductive layer, an inorganic layer, and an amorphous silicon layer. The substrate includes a first area including a transmission area and a non-transmission area adjacent to the transmission area, and a second area adjacent to the first area. The display portion is disposed in the non-transmission area and the second area on the substrate. The conductive layer is disposed between the substrate and the display portion, and overlaps the non-transmission area and the second area. The inorganic layer is disposed on the substrate under the conductive layer, in contact with the conductive layer, and overlaps the conductive layer. The amorphous silicon layer is disposed on the substrate, under the inorganic layer, in contact with the inorganic layer, overlaps the conductive layer in the first area, and entirely overlaps the substrate in the second area.
    Type: Application
    Filed: September 11, 2023
    Publication date: May 16, 2024
    Inventors: MYOUNGGEUN CHA, KISEOK CHOI, DONGKYUN SEO, HEEKYUN SHIN, YONG-HOON YANG
  • Publication number: 20240081100
    Abstract: A display device includes a substrate, a butter layer and light emitting diodes. The substrate defines a first display area including a first pixel area and a transmission area and a second display area including a second pixel area and surrounding at least a portion of the first display area, and the substrate includes an adhesive layer through which a first opening overlapping the transmission area is defined. The buffer layer is disposed on the substrate, and a second opening overlapping the transmission area is defined through the buffer layer. The light emitting diodes are disposed on the buffer layer and overlap the first and second pixel areas.
    Type: Application
    Filed: May 11, 2023
    Publication date: March 7, 2024
    Inventors: KISEOK CHOI, HEEKYUN SHIN, YONG-HOON YANG, MYOUNGGEUN CHA
  • Patent number: 11864411
    Abstract: A display apparatus includes a first substrate, a main pixel circuit located on the first substrate and including a first semiconductor layer, an auxiliary pixel circuit located on the first substrate and including a second semiconductor layer, a buffer layer located between the first substrate and the first semiconductor layer and between the first substrate and the second semiconductor layer, and a barrier layer located between the first substrate and the buffer layer, including one material from among silicon nitride (SiNx), aluminum oxide (Al2O3), and zirconium oxide (Zr2O3), and having a density ranging from about 2 g/cm3 to about 6 g/cm3.
    Type: Grant
    Filed: November 9, 2020
    Date of Patent: January 2, 2024
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Yungbin Chung, Sanggun Choi, Yeoungkeol Woo, Myounggeun Cha, Eunjin Kwak
  • Patent number: 11705063
    Abstract: A display device includes a first transistor including a first channel region, a first gate electrode overlapping the first channel region, and a first electrode connected to a node receiving a driving voltage, a second transistor electrically connected to the first electrode of the first transistor, the second transistor including a second channel region and a second gate electrode overlapping the first channel region and receiving a scan signal, a light emitting element electrically connected to a second electrode of the first transistor, a first conductive line overlapping the first gate electrode with the first channel region in between and receiving a variable voltage different from the driving voltage, and a second conductive line overlapping the second gate electrode with the second channel region in between and receiving the scan signal.
    Type: Grant
    Filed: June 10, 2020
    Date of Patent: July 18, 2023
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Myounggeun Cha, Sanggun Choi, Hyena Kwak, Jiyeong Shin, Yongsu Lee, Kiseok Choi
  • Publication number: 20230090817
    Abstract: A display apparatus for displaying a high-resolution image and having a low occurrence rate of defects caused by a voltage drop. The display apparatus includes a substrate, a first conductive layer arranged on the substrate and including an auxiliary data line extending in a first direction, a first semiconductor layer arranged on the first conductive layer, a first gate layer arranged on the first semiconductor layer, a first connection electrode layer arranged on the first gate layer and including a first connection electrode electrically connected to the first semiconductor layer and the auxiliary data line, and a second connection electrode layer arranged on the first connection electrode layer and including a data line electrically connected to the first connection electrode.
    Type: Application
    Filed: May 12, 2022
    Publication date: March 23, 2023
    Inventors: Myounggeun Cha, Joohee Jeon, Sanggun Choi
  • Publication number: 20230023524
    Abstract: A display device includes: a substrate including a display area including a first pixel area, a component area adjacent to the display area, and a non-display area adjacent to the display area, where the component area includes a second pixel area and a transmission area, and the non-display area includes a bending area; a first inorganic layer continuously arranged in the transmission area on the substrate, where a lower opening overlapping the bending area is defined through the first inorganic layer; a blocking layer on the first inorganic layer, a blocking layer opening overlapping the transmission area and an intermediate opening overlapping the lower opening are defined through the blocking layer; and a display element layer on the blocking layer, where the display element layer includes a first display element overlapping the first pixel area and a second display element overlapping the second pixel area.
    Type: Application
    Filed: March 9, 2022
    Publication date: January 26, 2023
    Inventors: Subin Bae, Dawoon Jung, Yugwang Jeong, Sungwon Cho, Myounggeun Cha, Sanggun Choi
  • Publication number: 20220406877
    Abstract: A display device includes a first pixel and a second pixel. A light emitting element and a pixel circuit of the second pixel are in a second area. The first pixel includes a silicon transistor and an oxide transistor in the second area. The first pixel includes a connection line that electrically connects one of the silicon transistor and the oxide transistor to a light emitting element in a first area. The connection line is on the same layer as the oxide semiconductor pattern and includes a transparent conductive oxide.
    Type: Application
    Filed: May 26, 2022
    Publication date: December 22, 2022
    Inventors: MYOUNGGEUN CHA, SOYOUNG KOO, DONGHWAN SHIM, SANGGUN CHOI
  • Publication number: 20220399407
    Abstract: Provided are a display panel and an electronic apparatus including the display panel. The display panel includes a substrate including a polymer resin; first and second pixel circuits each including a thin-film transistor, a first light-emitting diode connected to the first pixel circuit and located in a first display area; a second light-emitting diode connected to the second pixel circuit and located in a sub-display area of a second display area, a bottom metal layer in the second display area and between the substrate and the second pixel circuit; and a protective layer between the substrate and the bottom metal layer and corresponding to the first and second display areas, wherein the bottom metal layer includes a first opening in a transmissive area, and the protective layer includes a second opening in the transmissive area and overlapping the first opening of the bottom metal layer.
    Type: Application
    Filed: December 29, 2021
    Publication date: December 15, 2022
    Inventors: Myounggeun Cha, Sanggun Choi, Jiyeong Shin, Kiseok Choi
  • Patent number: 11455955
    Abstract: A display device may include a substrate, an organic light emitting element on the substrate, a pixel circuit between the substrate and the organic light emitting element, electrically connected to the organic light emitting element, and including a first transistor and a second transistor, a first metal layer between the substrate and the pixel circuit, overlapping the first transistor, and configured to receive a first voltage, and a second metal layer between the substrate and the pixel circuit, overlapping the second transistor, and configured to receive a second voltage different from the first voltage.
    Type: Grant
    Filed: March 29, 2019
    Date of Patent: September 27, 2022
    Assignee: Samsung Display Co., Ltd.
    Inventors: Myounggeun Cha, Sanggun Choi, Jiyeong Shin, Yongsu Lee
  • Patent number: 11423839
    Abstract: A display device may include a substrate, an organic light emitting element on the substrate, a pixel circuit between the substrate and the organic light emitting element, electrically connected to the organic light emitting element, and including a first transistor and a second transistor, a first metal layer between the substrate and the pixel circuit, overlapping the first transistor, and configured to receive a first voltage, and a second metal layer between the substrate and the pixel circuit, overlapping the second transistor, and configured to receive a second voltage different from the first voltage.
    Type: Grant
    Filed: March 29, 2019
    Date of Patent: August 23, 2022
    Assignee: Samsung Display Co., Ltd.
    Inventors: Myounggeun Cha, Sanggun Choi, Jiyeong Shin, Yongsu Lee
  • Patent number: 11183650
    Abstract: A display substrate includes a first conductive layer on a base substrate, a first insulation layer on the first conductive layer, a second conductive layer on the first insulation layer, a second insulation layer on the second conductive layer, and a third conductive layer on the second insulation layer. The third conductive layer is connected to the first conductive layer and the second conductive layer through a contact hole passing through the first insulation layer, the second conductive layer, and the second insulation layer. A sidewall of the contact hole has a stepped shape.
    Type: Grant
    Filed: November 28, 2018
    Date of Patent: November 23, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Myounggeun Cha, Sanggun Choi, Meejae Kang, Sanggab Kim, Joon woo Bae, Thanh Tien Nguyen, Kyoungwon Lee, Yongsu Lee
  • Publication number: 20210320278
    Abstract: A display apparatus includes a first substrate, a main pixel circuit located on the first substrate and including a first semiconductor layer, an auxiliary pixel circuit located on the first substrate and including a second semiconductor layer, a buffer layer located between the first substrate and the first semiconductor layer and between the first substrate and the second semiconductor layer, and a barrier layer located between the first substrate and the buffer layer, including one material from among silicon nitride (SiNx), aluminum oxide (Al2O3), and zirconium oxide (Zr2O3), and having a density ranging from about 2 g/cm3 to about 6 g/cm3.
    Type: Application
    Filed: November 9, 2020
    Publication date: October 14, 2021
    Inventors: Yungbin Chung, Sanggun Choi, Yeoungkeol Woo, Myounggeun Cha, Eunjin Kwak
  • Publication number: 20210312865
    Abstract: A display device may include a substrate, an organic light emitting element on the substrate, a pixel circuit between the substrate and the organic light emitting element, electrically connected to the organic light emitting element, and including a first transistor and a second transistor, a first metal layer between the substrate and the pixel circuit, overlapping the first transistor, and configured to receive a first voltage, and a second metal layer between the substrate and the pixel circuit, overlapping the second transistor, and configured to receive a second voltage different from the first voltage.
    Type: Application
    Filed: March 29, 2019
    Publication date: October 7, 2021
    Inventors: Myounggeun CHA, Sanggun CHOI, Jiyeong SHIN, Yongsu LEE
  • Publication number: 20210296407
    Abstract: An organic light emitting diode display device includes a substrate, a buffer layer, a first circuit structure, a sub-pixel structure, and a first signal wire. The substrate includes a display region including a plurality of sub-pixel regions and a peripheral region surrounding the display region. The buffer layer is disposed in the display region and peripheral region on the substrate. The first circuit structure is disposed in the peripheral region on the buffer layer. The sub-pixel structure is disposed in each of the sub-pixel regions on the first circuit structure. The first signal wire is disposed in the peripheral region between the substrate and the buffer layer, and overlaps the first circuit structure when viewed from a plan view in a thickness direction of the substrate.
    Type: Application
    Filed: June 3, 2021
    Publication date: September 23, 2021
    Inventors: Heena KIM, Myounggeun CHA, Sang Jin PARK, Young Seok BAEK
  • Patent number: 11063093
    Abstract: An organic light emitting diode display device includes a substrate, a buffer layer, a first circuit structure, a sub-pixel structure, and a first signal wire. The substrate includes a display region including a plurality of sub-pixel regions and a peripheral region surrounding the display region. The buffer layer is disposed in the display region and peripheral region on the substrate. The first circuit structure is disposed in the peripheral region on the buffer layer. The sub-pixel structure is disposed in each of the sub-pixel regions on the first circuit structure. The first signal wire is disposed in the peripheral region between the substrate and the buffer layer, and overlaps the first circuit structure when viewed from a plan view in a thickness direction of the substrate.
    Type: Grant
    Filed: December 10, 2019
    Date of Patent: July 13, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Heena Kim, Myounggeun Cha, Sang Jin Park, Young Seok Baek
  • Patent number: 11024696
    Abstract: A display apparatus has a display area and a non-display area around the display area, the display apparatus includes, in the non-display area, a first power line, a driving circuit on a layer over the first power line, and a second power line electrically connected to the first power line and on a same layer on which one electrode of the driving circuit is arranged.
    Type: Grant
    Filed: July 12, 2019
    Date of Patent: June 1, 2021
    Assignee: Samsung Display Co., Ltd.
    Inventors: Myounggeun Cha, Yongsu Lee, Sanggun Choi, Jiyeong Shin