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: 20200327848
    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: May 11, 2020
    Publication date: October 15, 2020
    Applicant: Samsung Display Co., Ltd.
    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: 20200312944
    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: June 16, 2020
    Publication date: October 1, 2020
    Inventors: JI-HYUN KA, SEUNG-KYU LEE, HWAN-SOO JANG, JIN-TAE JEONG
  • Publication number: 20200303489
    Abstract: An organic light-emitting display device includes: a substrate on which a display area and a non-display area surrounding the display area are defined, the display area includes a main area and at least one protruding area, and a plurality of pixels is in the display area; a first signal line on the substrate in the main area to provide signals to the plurality of pixels; a second signal line on the substrate in the protruding area to provide signals to the plurality of pixels; a compensation line on the substrate in the non-display area and electrically connected to the second signal line; and a bridge pattern over the second signal line and the compensation line in the non-display area and electrically connecting the second signal line with the compensation line, the bridge pattern including a double-bridge structure.
    Type: Application
    Filed: June 8, 2020
    Publication date: September 24, 2020
    Inventors: Ji Hyun Ka, Seung Ji Cha, Tae Hoon Kwon
  • Publication number: 20200302866
    Abstract: There are provided a display device and a driving method of the display device. The display device includes a display panel including a plurality of pixels, and a controller configured to determine an off ratio corresponding to an initialization driving power voltage of the display panel, and configured to control emission of the plurality of pixels corresponding to the determined off ratio, wherein different initialization driving power voltages are determined based on luminances and chromaticities of a plurality of display panels.
    Type: Application
    Filed: November 11, 2019
    Publication date: September 24, 2020
    Inventors: Eun Ju KIM, Ji Hyun KA
  • Publication number: 20200302850
    Abstract: A display device is provided. The display device comprises a display panel including a plurality of signal pads and one or more dummy pads, and at least one flexible wiring board providing signals to the signal pads, wherein a maximum bias period of signals provided to a pair of adjacent signal pads with at least one dummy pad interposed therebetween is longer than a maximum bias period of signals provided to a pair of adjacent signal pads with no dummy pad disposed therebetween.
    Type: Application
    Filed: June 10, 2020
    Publication date: September 24, 2020
    Inventors: TAE HOON KWON, Ji Hyun Ka, Byung Sun Kim, Yang Wan Kim, Hyung Jun Park, Su Jin Lee, Jae Tong Lee, Jin Tae Jeong, Seung Ji Cha
  • Publication number: 20200294434
    Abstract: A display device includes a peripheral area around a display area, a plurality of pixels in the display area, and a plurality of signal lines connected to the pixels. The signal lines include a plurality of data lines connected to the pixels, a crack detection line connected to first data lines among the data lines through a first transistor, and a control line connected to a gate of the first transistor. The crack detection line is in the peripheral area.
    Type: Application
    Filed: May 28, 2020
    Publication date: September 17, 2020
    Inventors: Seung-Kyu LEE, Tae Hoon KWON, Ji-Hyun KA, Won Kyu KWAK, Dong Soo KIM, Han-Sung BAE, Hey Jin SHIN, Seung Ji CHA
  • Publication number: 20200286418
    Abstract: A display device includes a display unit including first color subpixels, second color subpixels, and third color subpixels, a scan driver for applying scan signals to scan lines connected to the first color subpixels, the second color subpixels, and the third color subpixels, a switch circuit for selecting first data lines connected to the first color subpixels and the second color subpixels for a first section, and selecting second data lines connected to the third color subpixels for a second section after the first section, and a data driver for applying data signals corresponding to the third color subpixels to the switch circuit for a third section between the first section and the second section, and applying data signals corresponding to the first color subpixels and the second color subpixels to the switch circuit for a fourth section after the second section.
    Type: Application
    Filed: March 3, 2020
    Publication date: September 10, 2020
    Inventors: DONG-EUP LEE, JI-HYUN KA, KI MYEONG EOM
  • Patent number: 10769991
    Abstract: A display device includes: a display region including a first pixel region, a second pixel region, and a third pixel region; a dummy region including a first dummy region disposed between the second pixel region and the third pixel region; first, second, and third pixels respectively arranged in the first pixel region, the second pixel region, and the third pixel region in a matrix of vertical lines and horizontal lines; a data converter configured to: receive first image data including effective data corresponding to the display region and dummy data corresponding to the dummy region; and generate second image data by converting a gray scale value of dummy data corresponding to at least one region of the first dummy region in the first image data into a predetermined first gray scale value, the first gray scale value being between a lowest gray scale value and a highest gray scale value.
    Type: Grant
    Filed: November 1, 2018
    Date of Patent: September 8, 2020
    Assignee: Samsung Display Co., Ltd.
    Inventors: Ji Hyun Ka, Tae Hoon Kwon, Ki Myeong Eom, Chung Yi, Se Byung Chae, Deok Jun Choi, Moon Sang Hwang
  • Patent number: 10769994
    Abstract: A display apparatus includes a substrate which includes a first pixel area and a second pixel area. A third pixel area is spaced apart from the second pixel area. A notch peripheral area is adjacent to the first, second and third pixel areas. A plurality of pixels are provided in the first, second and third pixel areas. A first scan line is disposed on the substrate. The first scan line includes a first portion disposed in the second pixel area, a second portion disposed in the third pixel area, and a third portion which connects the first portion to the second portion. The third portion is disposed in the notch peripheral area. A second scan line is disposed on the substrate in the first pixel area. A surface area of the first scan line is from about 90% to about 110% of a surface area of the second scan line.
    Type: Grant
    Filed: January 29, 2019
    Date of Patent: September 8, 2020
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Ji-Hyun Ka, Taehoon Kwon, Kimyeong Eom
  • Patent number: 10770535
    Abstract: A display device includes a substrate having a display area and a non-display area, a plurality of pixels in the display area, scan lines for supplying a scan signal to the pixels, the scan lines extending in a first direction, data lines for supplying a data signal to the pixels, the data lines extending in a second direction crossing the first direction, and a first dummy part in the non-display area, adjacent to an outermost pixel, connected to an outermost data line of the display area, forming a parasitic capacitor with the outermost pixel, and including a first dummy data line and a first dummy power pattern extending in parallel to the data lines.
    Type: Grant
    Filed: December 13, 2019
    Date of Patent: September 8, 2020
    Assignee: Samsung Display Co., Ltd.
    Inventors: Yang Wan Kim, Ji Hyun Ka, Tae Hoon Kwon, Byung Sun Kim, Hyung Jun Park, Su Jin Lee, Jae Yong Lee, Jin Tae Jeong, Seung Ji Cha
  • Patent number: 10769987
    Abstract: A display device includes first pixels in a first pixel region and connected to first scan lines and second pixels in a second pixel region connected to second scan lines. The second pixel has a width less than the first pixel region. The display device also includes a first scan driver to supply first scan signals to the first scan lines, a second scan driver to supply second scan signals to the second scan lines, a first signal line to supply a first driving signal to the first scan driver and the second scan driver, and a signal delay circuit connected to the first signal line to delay the first driving signal.
    Type: Grant
    Filed: February 22, 2017
    Date of Patent: September 8, 2020
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Seung Kyu Lee, Tae Hoon Kwon, Min Ku Lee, Ji Hyun Ka, Jin Tae Jeong, Seung Ji Cha
  • Patent number: 10762851
    Abstract: A display device includes: a display panel including a plurality of pixels; a scan driver configured to supply a scan signal to the plurality of pixels through a plurality of scan lines based on a scan start signal; an emission driver configured to supply an emission control signal to the plurality of pixels through a plurality of emission control lines based on an emission control start signal; and a timing controller configure to control an interval between a plurality of gate-on periods of the scan start signal within a gate-off period of the emission control start signal based on a dimming level.
    Type: Grant
    Filed: August 22, 2018
    Date of Patent: September 1, 2020
    Assignee: Samsung Display Co., Ltd.
    Inventors: Tae Hoon Kwon, Ji Hyun Ka, Jae Sic Lee, Seung Ji Cha
  • Publication number: 20200258973
    Abstract: A display device is disclosed, and the display device includes a substrate including first to third display regions, the second and the third display regions being spaced from each other, each of the second and third display regions having an area smaller than that of the first display region and being continuous to the first display region, first to third pixels in the first to third display regions, first to third lines connected to the first to third pixels, and a dummy part configured to compensate for a difference between a load value of the first lines and load values of the second and third lines, wherein the second display region includes a first sub-region adjacent to the first display region and a second sub-region spaced from the first display region, and the third display region includes a third sub-region adjacent to the first display region and a fourth sub-region spaced from the first display region.
    Type: Application
    Filed: April 27, 2020
    Publication date: August 13, 2020
    Inventors: Hyung Jun PARK, Yang Wan KIM, Byung Sun KIM, Su Jin LEE, Jae Yong LEE, Ji Hyun KA, Tae Hoon KWON, Jin Tae JEONG, Seung Ji CHA
  • Publication number: 20200234642
    Abstract: The present disclosure relates to a pixel displaying an image. A pixel includes an organic light emitting diode, a first transistor controlling an amount of current flowing from a first driving power supply to a second driving power supply via the organic light emitting diode in response to a voltage of a first node; a storage capacitor connected between the first node and the first driving power supply; a second transistor connected between a data line and the first node and turned on when a scan signal is supplied to a first scan line, and an auxiliary transistor connected between the second transistor and the data line and turned on when a scan signal is supplied to a second scan line. The second transistor and the auxiliary transistor have an overlapping turn-on period, and the second transistor is turned off before the auxiliary transistor is turned off.
    Type: Application
    Filed: April 6, 2020
    Publication date: July 23, 2020
    Inventors: Tae Hoon KIM, Ji Hyun KA, Seung Kyu LEE
  • Patent number: 10714508
    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: Grant
    Filed: July 31, 2019
    Date of Patent: July 14, 2020
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Seung-Kyu Lee, Tae Hoon Kwon, Ji-Hyun Ka
  • Patent number: 10713988
    Abstract: A display device is provided. The display device comprises a display panel including a plurality of signal pads and one or more dummy pads, and at least one flexible wiring board providing signals to the signal pads, wherein a maximum bias period of signals provided to a pair of adjacent signal pads with at least one dummy pad interposed therebetween is longer than a maximum bias period of signals provided to a pair of adjacent signal pads with no dummy pad disposed therebetween.
    Type: Grant
    Filed: July 19, 2018
    Date of Patent: July 14, 2020
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Tae Hoon Kwon, Ji Hyun Ka, Byung Sun Kim, Yang Wan Kim, Hyung Jun Park, Su Jin Lee, Jae Yong Lee, Jin Tae Jeong, Seung Ji Cha
  • Patent number: 10707287
    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: Grant
    Filed: March 12, 2019
    Date of Patent: July 7, 2020
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Dongsoo Kim, Ji-Hyun Ka
  • Patent number: 10700155
    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: Grant
    Filed: April 22, 2019
    Date of Patent: June 30, 2020
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Ji-Hyun Ka, Seung-Kyu Lee, Hwan-Soo Jang, Jin-Tae Jeong
  • Publication number: 20200205251
    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 27, 2020
    Publication date: June 25, 2020
    Inventors: Ji-Hyun Ka, Won-Kyu Kwak
  • Patent number: 10692412
    Abstract: A display device includes a peripheral area around a display area, a plurality of pixels in the display area, and a plurality of signal lines connected to the pixels. The signal lines include a plurality of data lines connected to the pixels, a crack detection line connected to first data lines among the data lines through a first transistor, and a control line connected to a gate of the first transistor. The crack detection line is in the peripheral area.
    Type: Grant
    Filed: February 19, 2019
    Date of Patent: June 23, 2020
    Assignee: Samsung Display Co., Ltd.
    Inventors: Seung-Kyu Lee, Tae Hoon Kwon, Ji-Hyun Ka, Won Kyu Kwak, Dong Soo Kim, Han-Sung Bae, Hey Jin Shin, Seung Ji Cha