Patents by Inventor Ji-Hyun Ka

Ji-Hyun Ka 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: 20170345367
    Abstract: A display device includes a first pixel region and a second pixel region having different widths. First pixels in the first pixel region each include a first transistor. Second pixels in the second pixel region each include a second transistor performing a same function as the first transistor. At least one of a channel width and a channel length of the first transistor of the first and second pixels is be different from one another.
    Type: Application
    Filed: March 10, 2017
    Publication date: November 30, 2017
    Inventors: Ji Hyun KA, Min Ku LEE, Tae Hoon KWON, Seung Kyu LEE, Jin Tae JEONG, Seung Ji CHA
  • Patent number: 9832839
    Abstract: A flexible display panel and a display apparatus including the flexible display panel are disclosed. The flexible display panel includes an encapsulated panel, a first protective film on one side of the encapsulated panel, and a second protective film on another side of the encapsulated panel. The encapsulated panel includes a flexible panel and a flexible encapsulation member on the flexible panel. The flexible panel includes a first region on a first plane and that includes a display region, and a second region on a second plane that is bent with respect to the first plane and that includes a non-display region. The flexible encapsulation member encapsulates the display region. The display apparatus also includes a support unit for maintaining a shape of the flexible panel.
    Type: Grant
    Filed: February 2, 2017
    Date of Patent: November 28, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Ji-Hyun Ka, Won-Kyu Kwak
  • Publication number: 20170317156
    Abstract: An organic light emitting display (OLED) device includes an organic light emitting diode having an anode and a cathode. The organic light emitting diode is configured to receive a reference voltage. A control transistor includes a first control electrode and a first semiconductor active layer. The control transistor is configured to receive a control signal. A driving transistor includes a second control electrode that is electrically connected to the control transistor, an input electrode that is configured to receive a power voltage, an output electrode that is electrically connected to the anode of the organic light emitting diode, and a second semiconductor active layer that includes a different material from that of the first semiconductor active layer. A shielding electrode is disposed on the second semiconductor active layer, overlapping the driving transistor, and configured to receive the power voltage.
    Type: Application
    Filed: May 1, 2017
    Publication date: November 2, 2017
    Inventors: DONGSOO KIM, Ji-Hyun Ka
  • Publication number: 20170301280
    Abstract: A display device includes a substrate including a first pixel area, a second pixel area, and a third pixel area, each of the second and third pixel areas having a smaller surface area than the first pixel area and being connected to the first pixel area, first to third pixels provided in the first to third pixel areas, respectively, first to third lines connected to the first to third pixels, respectively, a line connecting part connecting the second and third lines, and a dummy unit overlapping the line connecting part to compensate for a difference of a load value of the first line and a load value of the second line.
    Type: Application
    Filed: February 16, 2017
    Publication date: October 19, 2017
    Inventors: Ji Hyun KA, Sun Ja KWON, Tae Hoon KWON, Byung Sun KIM, Yang Wan KIM, Hyun Ae PARK, Su Jin LEE, Seung Kyu LEE, Jae Yong LEE, Jin Tae JEONG, Seung Ji CHA
  • Publication number: 20170294502
    Abstract: A display apparatus includes a substrate including a display area, a peripheral area surrounding the display area, a function-adding area, of which at least a portion is surrounded by the display area, and a detour area disposed between the display area and the function-adding area. The display apparatus includes a plurality of pixel circuits disposed in the display area. A plurality of driving lines are electrically connected to the pixel circuits and extend in a direction in the display area. A first detour line is disposed in the detour area and is electrically connected to a first driving line. A second detour line is disposed in the detour area. The second detour line is electrically connected to a second driving line and is disposed in a different layer from the first detour line.
    Type: Application
    Filed: January 12, 2017
    Publication date: October 12, 2017
    Inventors: JI-HYUN KA, SEUNG-KYU LEE, HWAN-SOO JANG, JIN-TAE JEONG
  • Publication number: 20170287937
    Abstract: A display device includes a display panel including a display area and a peripheral area, a plurality of data lines and a plurality of driving voltage lines provided in the display area, a plurality of data connection lines provided in the peripheral area and connected to the plurality of data lines, a first driving voltage transmission line provided in the peripheral area and overlapping the plurality of data connection lines, a second driving voltage transmission line provided in the peripheral area and disposed between the first driving voltage transmission line and the display area, and a plurality of driving voltage connection lines. The plurality of driving voltage connection lines are connected to the first driving voltage transmission line and the second driving voltage transmission line, and provided between the first driving voltage transmission line and the second driving voltage transmission line.
    Type: Application
    Filed: November 23, 2016
    Publication date: October 5, 2017
    Inventors: JI-HYUN KA, SEUNG-KYU LEE
  • Publication number: 20170249906
    Abstract: A display device according to example embodiments includes a display panel divided into a first area including a plurality of first area pixel rows and a second area including a plurality of second area pixel rows, the number of pixels of each of the second area pixel rows being less than the number of pixels of each of the first area pixel rows, a scan driver configured to provide a plurality of scan signals to the display panel based on a width of an active period of a clock signal, the scan signals being output having substantially the same width of active periods to each other, a data driver configured to provide a plurality of data signals to the display panel, and a timing controller configured to adjust the width of the active period of the clock signal within a frame period based on locations of the first area and the second area.
    Type: Application
    Filed: January 24, 2017
    Publication date: August 31, 2017
    Inventors: Jae-Du NOH, Sang-Won SEOK, Hwan-Soo JANG, Jin-Tae JEONG, Seung-Yeon CHO, Ji-Hyun KA
  • Patent number: 9747831
    Abstract: A flat panel display device formed in a pentile structure is provided, which includes a pixel portion and a lighting tester. The pixel portion includes a first pixel column, a second pixel column and a third pixel column. In the first pixel column, first pixels for displaying a first color and second pixels for displaying a second color are alternately arranged in a direction the data lines. In the second pixel column, first and second pixels arranged in reverse order of the first pixel column in a direction parallel to the data lines. In the third pixel column, third pixels for displaying a third color are arranged in a direction parallel to the data lines. The lighting tester applies a first voltage to the first pixel column and applies a second voltage to the second pixel column during a first time period. The lighting tester applies the second voltage to the first pixel column and applies the first voltage to the second pixel column during a second time period.
    Type: Grant
    Filed: July 20, 2015
    Date of Patent: August 29, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Ok-Kyung Park, Ji-Hyun Ka
  • Publication number: 20170150575
    Abstract: A flexible display panel and a display apparatus including the flexible display panel are disclosed. The flexible display panel includes an encapsulated panel, a first protective film on one side of the encapsulated panel, and a second protective film on another side of the encapsulated panel. The encapsulated panel includes a flexible panel and a flexible encapsulation member on the flexible panel. The flexible panel includes a first region on a first plane and that includes a display region, and a second region on a second plane that is bent with respect to the first plane and that includes a non-display region. The flexible encapsulation member encapsulates the display region. The display apparatus also includes a support unit for maintaining a shape of the flexible panel.
    Type: Application
    Filed: February 2, 2017
    Publication date: May 25, 2017
    Inventors: Ji-Hyun Ka, Won-Kyu Kwak
  • Publication number: 20170150574
    Abstract: A flexible display panel and a display apparatus including the flexible display panel are disclosed. The flexible display panel includes an encapsulated panel, a first protective film on one side of the encapsulated panel, and a second protective film on another side of the encapsulated panel. The encapsulated panel includes a flexible panel and a flexible encapsulation member on the flexible panel. The flexible panel includes a first region on a first plane and that includes a display region, and a second region on a second plane that is bent with respect to the first plane and that includes a non-display region. The flexible encapsulation member encapsulates the display region. The display apparatus also includes a support unit for maintaining a shape of the flexible panel.
    Type: Application
    Filed: February 2, 2017
    Publication date: May 25, 2017
    Inventors: Ji-Hyun Ka, Won-Kyu Kwak
  • Patent number: 9626902
    Abstract: A light emission driver for a display device is disclosed. In one aspect, the driver includes a first node to which first and second light emitting power source voltages are applied according to respective clock signals. The driver also includes a second node to which the first and third light emitting power source voltages are applied according to the respective clock signals. The driver further includes first and second transistors respectively turned on by the first and second nodes and respectively transmitting the second and first light emitting power source voltages to a light emitting signal output terminal, respectively.
    Type: Grant
    Filed: May 28, 2013
    Date of Patent: April 18, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Tae-Hoon Kwon, Ji-Hyun Ka
  • Publication number: 20170077143
    Abstract: Disclosed is a display device including: a substrate including a display area for displaying an image and a peripheral area neighboring the display area; a plurality of signal lines formed in the display area; a pad formed in the peripheral area; and a plurality of connection wires for connecting the signal lines and the pad, wherein a first connection wire and a second connection wire neighboring the first connection wire from among the plurality of connection wires are disposed on different layers, and the first connection wire and the second connection wire, which are formed to extend from the pad and are bent at least twice to have at least one being bent toward backward direction, are disposed in the peripheral area.
    Type: Application
    Filed: May 23, 2016
    Publication date: March 16, 2017
    Inventors: Seung-Kyu Lee, Tae Hoon Kwon, Ji-Hyun Ka
  • Patent number: 9565738
    Abstract: A flexible display panel and a display apparatus including the flexible display panel are disclosed. The flexible display panel includes an encapsulated panel, a first protective film on one side of the encapsulated panel, and a second protective film on another side of the encapsulated panel. The encapsulated panel includes a flexible panel and a flexible encapsulation member on the flexible panel. The flexible panel includes a first region on a first plane and that includes a display region, and a second region on a second plane that is bent with respect to the first plane and that includes a non-display region. The flexible encapsulation member encapsulates the display region. The display apparatus also includes a support unit for maintaining a shape of the flexible panel.
    Type: Grant
    Filed: July 6, 2016
    Date of Patent: February 7, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Ji-Hyun Ka, Won-Kyu Kwak
  • Publication number: 20160316541
    Abstract: A flexible display panel and a display apparatus including the flexible display panel are disclosed. The flexible display panel includes an encapsulated panel, a first protective film on one side of the encapsulated panel, and a second protective film on another side of the encapsulated panel. The encapsulated panel includes a flexible panel and a flexible encapsulation member on the flexible panel. The flexible panel includes a first region on a first plane and that includes a display region, and a second region on a second plane that is bent with respect to the first plane and that includes a non-display region. The flexible encapsulation member encapsulates the display region. The display apparatus also includes a support unit for maintaining a shape of the flexible panel.
    Type: Application
    Filed: July 6, 2016
    Publication date: October 27, 2016
    Inventors: Ji-Hyun Ka, Won-Kyu Kwak
  • Patent number: 9414463
    Abstract: A flexible display panel and a display apparatus including the flexible display panel are disclosed. The flexible display panel includes an encapsulated panel, a first protective film on one side of the encapsulated panel, and a second protective film on another side of the encapsulated panel. The encapsulated panel includes a flexible panel and a flexible encapsulation member on the flexible panel. The flexible panel includes a first region on a first plane and that includes a display region, and a second region on a second plane that is bent with respect to the first plane and that includes a non-display region. The flexible encapsulation member encapsulates the display region. The display apparatus also includes a support unit for maintaining a shape of the flexible panel.
    Type: Grant
    Filed: August 7, 2015
    Date of Patent: August 9, 2016
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Ji-Hyun Ka, Won-Kyu Kwak
  • Patent number: 9390644
    Abstract: Embodiments relate to a defect detecting method of a line and a demultiplexer, a defect detecting device, and a display panel including the defect detecting device. A demultiplexer may connect a plurality of data lines to a plurality of corresponding lines. The defect detecting device includes DC lines supplied with respective DC voltages, first switches connected to the DC lines and configured to transmit the respective DC voltages to the corresponding first data lines among a plurality of data lines according to a first gate signal, and second switches connected to the first to third DC lines and configured to transmit one of the respective DC voltages to corresponding second data lines among a plurality of data lines according to a second gate signal.
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: July 12, 2016
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Ji-Hyun Ka, Jin-Tae Jeong
  • Patent number: 9262952
    Abstract: Provided is an organic light emitting display panel. The organic light emitting display panel includes a pixel unit including a plurality of pixels I displaying mutually different colors, a plurality of data pads electrically connected to wirings extending from the data lines, each of the plurality of data pads being connected to corresponding data lines, respectively, and an array test unit applying an array test signal to the plurality of pixels of the pixel unit, and sensing a current outputted from the plurality of pixels. The array test unit includes an array test pad electrically connected to a plurality of data pads through a plurality of array test switches.
    Type: Grant
    Filed: September 12, 2013
    Date of Patent: February 16, 2016
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Ji-Hye Kim, Ji-Hyun Ka
  • Publication number: 20160037609
    Abstract: A flexible display panel and a display apparatus including the flexible display panel are disclosed. The flexible display panel includes an encapsulated panel, a first protective film on one side of the encapsulated panel, and a second protective film on another side of the encapsulated panel. The encapsulated panel includes a flexible panel and a flexible encapsulation member on the flexible panel. The flexible panel includes a first region on a first plane and that includes a display region, and a second region on a second plane that is bent with respect to the first plane and that includes a non-display region. The flexible encapsulation member encapsulates the display region. The display apparatus also includes a support unit for maintaining a shape of the flexible panel.
    Type: Application
    Filed: August 7, 2015
    Publication date: February 4, 2016
    Inventors: Ji-Hyun Ka, Won-Kyu Kwak
  • Patent number: 9189991
    Abstract: Disclosed herein is an organic light emitting display device capable of stably compensating for a threshold voltage of a driving transistor. The organic light emitting display device according the present invention includes pixels, each for storing a voltage of a data signal in a storage capacitor through a first threshold voltage different from a second threshold voltage of a driving transistor for driving the pixel; scan lines and light emitting control lines respectively coupled to the pixels; and data lines for supplying the data signal to the pixels.
    Type: Grant
    Filed: October 2, 2012
    Date of Patent: November 17, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Ji-Hyun Ka, Kwang-Min Kim
  • Publication number: 20150325160
    Abstract: A flat panel display device formed in a pentile structure is provided, which includes a pixel portion and a lighting tester. The pixel portion includes a first pixel column, a second pixel column and a third pixel column. In the first pixel column, first pixels for displaying a first color and second pixels for displaying a second color are alternately arranged in a direction the data lines. In the second pixel column, first and second pixels arranged in reverse order of the first pixel column in a direction parallel to the data lines. In the third pixel column, third pixels for displaying a third color are arranged in a direction parallel to the data lines. The lighting tester applies a first voltage to the first pixel column and applies a second voltage to the second pixel column during a first time period. The lighting tester applies the second voltage to the first pixel column and applies the first voltage to the second pixel column during a second time period.
    Type: Application
    Filed: July 20, 2015
    Publication date: November 12, 2015
    Inventors: Ok-Kyung Park, Ji-Hyun Ka