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: 20210158764
    Abstract: A display device includes first and second pixel areas spaced apart from each other so that corresponding scan lines are separate from each other, a first non-pixel area at a periphery of the first pixel area, a second non-pixel area at a periphery of the second pixel area and opposite to the first non-pixel area with at least one pixel area interposed therebetween, first scan lines in the first pixel area, second scan lines in the second pixel area, a first scan driver in the first non-pixel area and connected to the first scan lines, a second scan driver in the second non-pixel area and connected to the second scan lines, first wires in the first non-pixel area and connected to the first scan driver, second wires in the second non-pixel area and connected to the second scan driver; and connecting wires connecting the first wires and second wires.
    Type: Application
    Filed: February 1, 2021
    Publication date: May 27, 2021
    Inventors: Jin Tae JEONG, Ji Hyun KA, Tae Hoon KWON, Min Ku LEE, Seung Ji CHA
  • Publication number: 20210143241
    Abstract: A display device includes a substrate, data lines arranged on the substrate, the data lines to which data voltages are applied, scan lines arranged on the substrate, the scan lines to which scan signals are applied, and a pixel connected to one of the data lines and at least one of the scan lines. The pixel includes a light emitting element, a driving transistor which supplies a driving current flowing between a first electrode and a second electrode to the light emitting element in accordance with the data voltage of the data line applied to a gate electrode, a first transistor between the gate electrode and second electrode of the driving transistor, a shielding electrode overlapping at least a part of the first transistor in a thickness direction of the substrate. The shielding electrode does not overlap the data lines in the thickness direction of the substrate.
    Type: Application
    Filed: July 2, 2020
    Publication date: May 13, 2021
    Inventors: Jae Won KIM, Seung Woo SUNG, Ji Hyun KA, Na Yun KWAK, Dae Suk KIM, Ah Young KIM, Jun Young MIN, Jun Won CHOI, Su Jin Lee
  • Publication number: 20210118368
    Abstract: A display panel of an organic light emitting diode (OLED) display device having a display region includes a plurality of first pixels located at an upper half of the display region, a plurality of second pixels located at a lower half of the display region, a plurality of first data lines extending in a first direction, and coupled to the plurality of first pixels, a plurality of second data lines extending in the first direction, disposed alternately with the plurality of first data lines along a second direction crossing the first direction, and coupled to the plurality of second pixels, and a demultiplexing circuit configured to selectively couple a plurality of data channels of a data driver of the OLED display device to the plurality of first data lines or the plurality of second data lines.
    Type: Application
    Filed: September 15, 2020
    Publication date: April 22, 2021
    Inventors: Hai-Jung IN, Ji-Hyun KA, Won Kyu KWAK, Ki Myeong EOM, Kyonghwan OH
  • Patent number: 10985230
    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: June 11, 2020
    Date of Patent: April 20, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Dongsoo Kim, Ji-Hyun Ka
  • Patent number: 10957255
    Abstract: A display device includes: a first pixel including a first organic light emitting diode; an initialization voltage generator for generating a first initialization voltage to be supplied to an anode of the first organic light emitting diode; and a timing controller including a first lookup table in which a plurality of first initialization voltage values corresponding to a plurality of maximum luminances are recorded, the timing controller being configured to determine a value of the first initialization voltage, based on reception information on a target maximum luminance and the first lookup table.
    Type: Grant
    Filed: June 13, 2018
    Date of Patent: March 23, 2021
    Assignee: Samsung Display Co., Ltd.
    Inventors: Ji Hyun Ka, Seung Ji Cha, Mi Hae Kim, Ki Myeong Eom
  • Publication number: 20210057505
    Abstract: An electronic panel including: a base substrate including a first area and a second area, wherein the first area includes a module area and a display area adjacent to the module area; a display element layer including a plurality of display elements, wherein the plurality of display elements overlaps the first area; an encapsulation layer configured to cover the display elements; sensing patterns overlapping the first area and disposed on the encapsulation layer; a crack sensing pattern overlapping the module area and disposed on the encapsulation layer; an auxiliary pattern overlapping the module area and disposed on the encapsulation layer, wherein the auxiliary pattern has a shape that extends along an edge of the crack sensing pattern and extends between the sensing patterns and the crack sensing pattern; and a signal line disposed on the encapsulation layer to electrically connect the crack sensing pattern to the auxiliary pattern.
    Type: Application
    Filed: June 23, 2020
    Publication date: February 25, 2021
    Inventors: Kwangsae Lee, Ji-Hyun Ka, Kimyeong Eom
  • Publication number: 20210057515
    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 tine 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: November 5, 2020
    Publication date: February 25, 2021
    Inventors: JI-HYUN KA, SEUNG-KYU LEE, HWAN-SOO JANG, JIN-TAE JEONG
  • Patent number: 10930724
    Abstract: A pixel includes a pixel circuit and an organic light emitting diode. The pixel circuit has first, second, third, and fourth transistors. The first transistor controls an amount of current flowing from a first driving power supply coupled to a first node to a second driving power supply through the organic light emitting diode. The turns on when a scan signal is supplied to a first scan line. The third transistor turns on when a scan signal is supplied to a second scan line. The fourth transistor turns on when a scan signal is supplied to a third scan line. The first transistor is a p-type Low Temperature Poly-Silicon thin film transistor and the third transistor and the fourth transistor are n-type oxide semiconductor thin film transistors.
    Type: Grant
    Filed: August 12, 2019
    Date of Patent: February 23, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Ji Hyun Ka, Han Sung Bae, Won Kyu Kwak
  • Patent number: 10916191
    Abstract: A display device including a first pixel area including first pixels, a second pixel area including second pixels, a third pixel area including third pixels, and a display driver configured to control image display operations of the first pixel area, the second pixel area, and the third pixel area according to a first mode or a second mode, wherein the first pixel area includes a first sub-pixel area, and a second sub-pixel area between the first sub-pixel area and the second pixel area, and wherein the first sub-pixel area is configured to display a black image in the first mode, and the second sub-pixel area is configured to display a dummy image.
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: February 9, 2021
    Assignee: Samsung Display Co., Ltd.
    Inventors: Tae Hoon Kwon, Ji Hyun Ka, Min Ku Lee, Seung Ji Cha, Hyun Uk Oh, Jin Tae Jeong
  • Patent number: 10909909
    Abstract: A display device includes: a display panel including a gate line, an emission signal line, a data line, and a pixel coupled to the gate line, the emission signal line, and the data line; a gate driver configured to provide a gate signal to the gate line; an emission driver configured to provide an emission signal to the emission signal line; a data driver configured to provide a data signal to the data line; and a power supplier configured to provide the display panel with a power voltage for driving the pixel, wherein the emission driver is configured to start operating at a first time point in response to an emission enable signal provided from the data driver, and the gate driver is configured to start operating at a second time point in response to a gate enable signal provided from the data driver.
    Type: Grant
    Filed: June 13, 2019
    Date of Patent: February 2, 2021
    Assignee: Samsung Display Co., Ltd.
    Inventors: Dong Eup Lee, Ki Myeong Eom, Ji Hyun Ka
  • Patent number: 10909934
    Abstract: A display device includes first and second pixel areas spaced apart from each other so that corresponding scan lines are separate from each other, a first non-pixel area at a periphery of the first pixel area, a second non-pixel area at a periphery of the second pixel area and opposite to the first non-pixel area with at least one pixel area interposed therebetween, first scan lines in the first pixel area, second scan lines in the second pixel area, a first scan driver in the first non-pixel area and connected to the first scan lines, a second scan driver in the second non-pixel area and connected to the second scan lines, first wires in the first non-pixel area and connected to the first scan driver, second wires in the second non-pixel area and connected to the second scan driver; and connecting wires connecting the first wires and second wires.
    Type: Grant
    Filed: November 18, 2019
    Date of Patent: February 2, 2021
    Inventors: Jin Tae Jeong, Ji Hyun Ka, Tae Hoon Kwon, Min Ku Lee, Seung Ji Cha
  • Patent number: 10879333
    Abstract: An organic light emitting display device includes a display unit including a first pixel column and a first data line connected to the first pixel column, a first pad unit including first and second signal pads, a test unit including a first switching element which is connected between the first data line and the first signal pad, and includes a control electrode connected to the second signal pad, a first conductive pattern provided in a different layer from that of the first signal pad and connected to the first signal pad, and a second conductive pattern provided in a different layer from that of the second signal pad and connected to the second signal pad, where the first and second conductive patterns are spaced apart from each other in the same layer, and a width of the first conductive pattern is greater than that of the second conductive pattern.
    Type: Grant
    Filed: February 7, 2018
    Date of Patent: December 29, 2020
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Ji Hyun Ka, Tae Hoon Kwon, Yang Wan Kim, Min Ku Lee, Jae Yong Lee, Jin Tae Jeong, Seung Ji Cha
  • Publication number: 20200402460
    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: Application
    Filed: September 4, 2020
    Publication date: December 24, 2020
    Inventors: JI-HYUN KA, TAEHOON KWON, KIMYEONG EOM
  • Publication number: 20200403058
    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: Application
    Filed: September 4, 2020
    Publication date: December 24, 2020
    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
  • Publication number: 20200402454
    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: Application
    Filed: September 6, 2020
    Publication date: December 24, 2020
    Inventors: Ji Hyun KA, Tae Hoon KWON, Ki Myeong EOM, Chung YI, Se Byung CHAE, Deok Jun CHOI, Moon Sang HWANG
  • Publication number: 20200394950
    Abstract: A display device includes pixels coupled to first scan lines, second scan lines, emission control lines, and data lines; a first scan driver to supply a scan signal to each of the first scan lines at a first frequency to drive the display device at a first driving frequency, and to supply the scan signal to each of the first scan lines at a second frequency to drive the display device at a second driving frequency lower than the first driving frequency; a second scan driver to supply a scan signal to each of the second scan lines at the first frequency to drive the display device at the first driving frequency, and to supply the scan signal to each of the second scan lines at the second frequency to drive the display device at the second driving frequency; an emission driver to supply an emission control signal to each of the emission control lines at the first frequency; and a data driver to supply a data signal to each of the data lines in response to the scan signal supplied to each of the first scan lines
    Type: Application
    Filed: June 2, 2020
    Publication date: December 17, 2020
    Inventors: Kyong Hwan OH, Ji Hyun Ka, Ki Myeong Eom, Hai Jung In, Jin Jeon, Won Kyu Kwak, Hyun Lee, Hwan Soo Jang, Jin Tae Jeong
  • Publication number: 20200381503
    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: June 11, 2020
    Publication date: December 3, 2020
    Inventors: Dongsoo Kim, Ji-Hyun Ka
  • Patent number: 10854705
    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: June 16, 2020
    Date of Patent: December 1, 2020
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Ji-Hyun Ka, Seung-Kyu Lee, Hwan-Soo Jang, Jin-Tae Jeong
  • 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