Patents by Inventor Hyun-Wook Cho

Hyun-Wook Cho 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: 20250224840
    Abstract: A driving circuit includes: a display driver to generate a horizontal synchronization signal and a vertical synchronization signal according to a first clock signal of a first oscillator; a sensor driver to generate a touch signal according to a second clock signal of a second oscillator; and a determination circuit to detect a cycle of at least one of the horizontal synchronization signal or the vertical synchronization signal according to the second clock signal, and output a detection signal when the cycle is out of a range. The determination circuit is a part of the display driver or the sensor driver.
    Type: Application
    Filed: March 24, 2025
    Publication date: July 10, 2025
    Inventors: Jun Young KO, Tae Hyeon YANG, Han Su CHO, Tae Joon KIM, Hyun Wook CHO, Jae Woo CHOI
  • Patent number: 12340058
    Abstract: An electronic device includes a display unit including an active area configured to display an image, a peripheral area adjacent to the active area, and an input sensing unit disposed on the display unit within the active area. The input sensing unit includes a first sensing electrode disposed in the active area and a second sensing electrode spaced apart from the first sensing electrode and disposed in the active area.
    Type: Grant
    Filed: December 22, 2023
    Date of Patent: June 24, 2025
    Assignee: Samsung Display Co., Ltd.
    Inventors: Eunsol Seo, Hyun-Wook Cho, Jaewoo Choi, Taejoon Kim
  • Patent number: 12321553
    Abstract: An electronic device includes a first electrode, a second electrode, and a third electrode. The first electrode includes a first boundary side extending in a direction. The second electrode includes a second boundary side extending in the direction. The third electrode is disposed between and spaced apart from the first electrode and the second electrode. The third electrode includes a first side facing the first boundary side and a second side facing the second boundary. The first side and the second side have shapes that are asymmetric to each other with respect to a center axis extending in the direction.
    Type: Grant
    Filed: May 22, 2023
    Date of Patent: June 3, 2025
    Assignee: Samsung Display Co., Ltd.
    Inventors: Sanghyun Jun, Hwan-hee Jeong, Kicheol Kim, Jaehyun Lee, Hyun-wook Cho
  • Publication number: 20250165100
    Abstract: Provided is a display device comprising a display panel, an input sensor including a first sensing area having a first sub-area and a second sub-area, and a first sensor controller configured to drive the first sensing area. Here, the input sensor includes first sensing electrodes disposed in the first sub-area to receive a first transmission signal from the first sensor controller, second sensing electrodes disposed in the first sub-area and intersected with the first sensing electrodes, third sensing electrodes disposed in the second sub-area to receive a second transmission signal having a phase inverted from that of the first transmission signal from the first sensor controller, and fourth sensing electrodes disposed in the second sub-area and intersected with the third sensing electrodes.
    Type: Application
    Filed: January 2, 2025
    Publication date: May 22, 2025
    Inventors: HYUNGBAE KIM, HYUN-WOOK CHO, SANGKOOK KIM, TAEJOON KIM, JAEHYUN PARK, JIYEONG LEE
  • Publication number: 20250156012
    Abstract: A display device includes a first display panel, a second display panel disposed adjacent to the first display panel, a first touch array disposed on the first display panel, a second touch array disposed on the second display panel, a first touch driver that applies a first touch driving signal to the first touch array in response to a frame synchronization signal, a second touch driver that applies a second touch driving signal to the second touch array in response to the frame synchronization signal, and a common line commonly connected to the first and second touch drivers to transmit the frame synchronization signal, and pulses included in the first touch driving signal and pulses included in the second touch driving signal have phases opposite to each other.
    Type: Application
    Filed: May 30, 2024
    Publication date: May 15, 2025
    Inventors: Yu Jin SIN, Jae Hyun PARK, IL Ho LEE, Hyun Wook CHO
  • Publication number: 20250156013
    Abstract: The display device includes a first display panel, a second display panel disposed adjacent to the first display panel, a first touch array disposed on the first display panel, a second touch array disposed on the second display panel, a first touch driver that applies a first touch driving signal to the first touch array in response to a frame synchronization signal, a second touch driver that applies a second touch driving signal to the second touch array in response to the frame synchronization signal, and a common line commonly connected to the first and second touch drivers to transmit the frame synchronization signal, wherein a frequency of pulses included in the first touch driving signal is different from a frequency of pulses included in the second touch driving signal.
    Type: Application
    Filed: June 6, 2024
    Publication date: May 15, 2025
    Inventors: Yu Jin SIN, Hyun Wook CHO, Jae Woo CHOI
  • Patent number: 12299246
    Abstract: An electronic apparatus includes an electronic panel including a plurality of sensing groups spaced apart from each other, and an electronic module overlapping with the electronic panel in a plan view. Each of the sensing groups includes a first sensing electrode extending in a second direction, and second sensing electrodes spaced apart from each other in the second direction, located on the same layer as the first sensing electrode, and face the first sensing electrode in a first direction. An opening overlapping with the electronic module and penetrating a first sensing group of the sensing groups is defined in the electronic panel, and at least one selected from the first sensing electrode and the second sensing electrodes of the first sensing group extends along an edge of the opening.
    Type: Grant
    Filed: December 11, 2023
    Date of Patent: May 13, 2025
    Assignee: Samsung Display Co., Ltd.
    Inventors: Joo-Hyeon Jeong, Taejoon Kim, Hyun-Wook Cho, Jaewoo Choi
  • Publication number: 20250138070
    Abstract: In a method for testing an electronic device, the method includes: providing an electronic device including a display layer and a sensor layer on the display layer and configured to operate at a touch drive frequency, the sensor layer including a plurality of first electrodes and a plurality of second electrodes insulatively intersecting the plurality of first electrodes; providing a test signal having a test frequency higher than the touch drive frequency to the plurality of first electrodes; measuring mutual capacitance with the plurality of first electrodes through the plurality of second electrodes; and determining whether or not the sensor layer is defective, based on the mutual capacitance.
    Type: Application
    Filed: January 7, 2025
    Publication date: May 1, 2025
    Inventors: EUNSOL SEO, HYUN-WOOK CHO, SANGKOOK KIM, TAEJOON KIM, EUNGKWAN LEE, JAEWOO CHOI
  • Patent number: 12277298
    Abstract: A display device includes a display panel and an input sensing panel. The input sensing panel includes pluralities of first and second sensing electrodes and electrostatic induction patterns, each of which is connected to a sensing electrode from one of the pluralities of sensing electrodes and overlaps another sensing electrode from the other one of the pluralities of sensing electrodes. The input sensing panel includes a first area where deviations of mutual capacitances between the first and second sensing electrodes are small and a second area where the deviations are large. The electrostatic induction patterns include first electrostatic induction patterns disposed in the first area and second electrostatic induction patterns disposed in the second area, the second electrostatic induction patterns having a different area from the first electrostatic induction patterns, or the number of second electrostatic induction patterns being different from the number of first electrostatic induction patterns.
    Type: Grant
    Filed: September 29, 2023
    Date of Patent: April 15, 2025
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hyungbae Kim, Hyun-Wook Cho, Sangkook Kim, Taejoon Kim, Jaehyun Park, Jiyeong Lee
  • Patent number: 12260046
    Abstract: A driving circuit includes: a display driver to generate a horizontal synchronization signal and a vertical synchronization signal according to a first clock signal of a first oscillator; a sensor driver to generate a touch signal according to a second clock signal of a second oscillator; and a determination circuit to detect a cycle of at least one of the horizontal synchronization signal or the vertical synchronization signal according to the second clock signal, and output a detection signal when the cycle is out of a range. The determination circuit is a part of the display driver or the sensor driver.
    Type: Grant
    Filed: June 26, 2023
    Date of Patent: March 25, 2025
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jun Young Ko, Tae Hyeon Yang, Han Su Cho, Tae Joon Kim, Hyun Wook Cho, Jae Woo Choi
  • Publication number: 20250077034
    Abstract: A display device includes a plurality of touch cells, and a central area and an edge area. The plurality of touch cells is arranged in a first direction and a second direction crossing the first direction, and is located in the central area and the edge area. The edge area includes first to fourth sub-edge areas. Shapes of touch cells in the central area are different from shapes of touch cells in the edge area. Shapes of touch cells in the first and second sub-edge areas are different from shapes of touch cells in the third and fourth sub-edge areas.
    Type: Application
    Filed: April 17, 2024
    Publication date: March 6, 2025
    Inventors: Eung Kwan LEE, Tae Joon KIM, Ji Yeong LEE, Hyun Wook CHO, Jae Woo CHOI
  • Patent number: 12243457
    Abstract: Disclosed is an apparatus for inspecting a defect of a display panel. The apparatus for inspecting includes the display panel that displays an image, an input sensor that is disposed on the display panel and senses an input applied from outside, a sensor driving part that drives the input sensor, and an inspection part that is connected with the sensor driving part, sets a frequency of the input sensor to an inspection frequency, and detects the defect of the display panel based on a change in a jitter occurring when the input sensor is driven at the inspection frequency. The inspection frequency includes a harmonic frequency of a driving frequency of the display panel.
    Type: Grant
    Filed: January 6, 2023
    Date of Patent: March 4, 2025
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Min-Hong Kim, Taejoon Kim, Jungmok Park, Bogeun Yuk, Hyun-Wook Cho
  • Patent number: 12236048
    Abstract: A touch sensor includes first touch cells disposed in a first touch sensing area, the first touch cells each including a first touch pattern and a first dummy pattern, and second touch cells disposed in a second touch sensing area, the second touch cells each including a second touch pattern and a second dummy pattern. An area of a first dummy pattern area in which the first dummy pattern is disposed is greater than an area of a second dummy pattern area in which the second dummy pattern is disposed.
    Type: Grant
    Filed: January 2, 2024
    Date of Patent: February 25, 2025
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hyung Bae Kim, Min Hong Kim, Sang Kook Kim, Tae Joon Kim, Jae Hyun Park, Ji Yeong Lee, Hyun Wook Cho
  • Patent number: 12223140
    Abstract: Provided is a display device comprising a display panel, an input sensor including a first sensing area having a first sub-area and a second sub-area, and a first sensor controller configured to drive the first sensing area. Here, the input sensor includes first sensing electrodes disposed in the first sub-area to receive a first transmission signal from the first sensor controller, second sensing electrodes disposed in the first sub-area and intersected with the first sensing electrodes, third sensing electrodes disposed in the second sub-area to receive a second transmission signal having a phase inverted from that of the first transmission signal from the first sensor controller, and fourth sensing electrodes disposed in the second sub-area and intersected with the third sensing electrodes.
    Type: Grant
    Filed: January 11, 2023
    Date of Patent: February 11, 2025
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hyungbae Kim, Hyun-Wook Cho, Sangkook Kim, Taejoon Kim, Jaehyun Park, Jiyeong Lee
  • Patent number: 12223132
    Abstract: According to an embodiment of the disclosure, a display device includes a sensor driver receiving firmware from an host in which the firmware is stored, the sensor driver including a second memory storing the firmware supplied from the host and initialized when a reset signal is supplied from the host, and a sensing unit for supplying a recovery signal corresponding to an abnormal state of the sensor driver to the host while sensing at least one of an internal voltage and a clock signal of the sensor driver.
    Type: Grant
    Filed: June 19, 2023
    Date of Patent: February 11, 2025
    Assignee: Samsung Display Co., Ltd.
    Inventors: Min Hong Kim, Tae Joon Kim, Jung Mok Park, Jin Woo Park, Hyun Wook Cho
  • Publication number: 20250044907
    Abstract: An input sensing part includes a first sensing electrode, a second sensing electrode that is insulated from the first sensing electrode and crosses the first sensing electrode, a plurality of dummy electrodes that are disposed in dummy areas located between the first and second sensing electrodes, when viewed in a plan view, and a dummy connection pattern that is insulated from the first and second sensing electrodes. The dummy connection pattern crosses the first sensing electrode or the second sensing electrode, when viewed in a plan view, and connects the dummy electrodes.
    Type: Application
    Filed: October 22, 2024
    Publication date: February 6, 2025
    Inventors: HYUNGBAE KIM, HYUN-WOOK CHO, SANGKOOK KIM, TAEJOON KIM
  • Patent number: 12216144
    Abstract: In a method for testing an electronic device, the method includes: providing an electronic device including a display layer and a sensor layer on the display layer and configured to operate at a touch drive frequency, the sensor layer including a plurality of first electrodes and a plurality of second electrodes insulatively intersecting the plurality of first electrodes; providing a test signal having a test frequency higher than the touch drive frequency to the plurality of first electrodes; measuring mutual capacitance with the plurality of first electrodes through the plurality of second electrodes; and determining whether or not the sensor layer is defective, based on the mutual capacitance.
    Type: Grant
    Filed: June 23, 2023
    Date of Patent: February 4, 2025
    Assignee: Samsung Display Co., Ltd.
    Inventors: Eunsol Seo, Hyun-Wook Cho, Sangkook Kim, Taejoon Kim, Eungkwan Lee, Jaewoo Choi
  • Publication number: 20250013325
    Abstract: An electronic device including: a display layer; and a sensor layer that includes: first electrodes in a sensing area and having different lengths; second electrodes in the sensing area; first cross electrodes in the sensing area; second cross electrodes in the sensing area and having different lengths; pads in a peripheral area; first lines extended from the first electrodes at a first side of the sensing area towards the pads; second lines extended from the second electrodes at a second side of the sensing area towards the pads; first cross lines extending from the first cross electrodes towards the pads; and second cross lines extending from the second cross electrodes towards the pads, the first lines being different from the second lines in number, and the first cross lines being different from the second cross lines in number.
    Type: Application
    Filed: September 17, 2024
    Publication date: January 9, 2025
    Inventors: JUNGMOK PARK, TAE YONG EOM, HYUN-WOOK CHO, DONGJIN MOON, YERI JEONG
  • Patent number: 12164735
    Abstract: An input sensing part includes a first sensing electrode, a second sensing electrode that is insulated from the first sensing electrode and crosses the first sensing electrode, a plurality of dummy electrodes that are disposed in dummy areas located between the first and second sensing electrodes, when viewed in a plan view, and a dummy connection pattern that is insulated from the first and second sensing electrodes. The dummy connection pattern crosses the first sensing electrode or the second sensing electrode, when viewed in a plan view, and connects the dummy electrodes.
    Type: Grant
    Filed: January 19, 2023
    Date of Patent: December 10, 2024
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hyungbae Kim, Hyun-Wook Cho, Sangkook Kim, Taejoon Kim
  • Publication number: 20240393904
    Abstract: A display device includes a display panel, and an input sensing part disposed on the display panel and in which an active region and a non-active region around the active region are defined. The input sensing part includes a plurality of sensing electrodes dispose in the active region, a plurality of sensing lines electrically connected to the sensing electrodes and disposed in the non-active region, and a guard line, a ground line, and an electromagnetic attenuating line spaced apart from the sensing lines and disposed in the non-active region. The guard line, the ground line, and the electromagnetic attenuating line are disposed at an outside of the sensing lines.
    Type: Application
    Filed: August 5, 2024
    Publication date: November 28, 2024
    Inventors: HYUNGBAE KIM, HYUN-WOOK CHO, SANGKOOK KIM, TAEJOON KIM