Patents by Inventor Donghak Pyo

Donghak Pyo 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: 20230350518
    Abstract: A display device includes a display panel and an input sensing unit on the display panel, the input sensing unit includes sensing pads, sensing electrodes overlapping the display area and arranged in rows and columns, and sensing wirings connecting the sensing pads and the sensing electrodes, the sensing wirings include first trace wirings and second trace wirings on different layers, the sensing electrodes include a first row sensing electrode and a second row sensing electrode, and a third row sensing electrode and a fourth row sensing electrode, the first trace wirings are connected to each of the first row sensing electrode and the second row sensing electrode, and the second trace wirings are connected to each of the third row sensing electrode and the fourth row sensing electrode.
    Type: Application
    Filed: March 22, 2023
    Publication date: November 2, 2023
    Inventors: DONGHAK PYO, JUNGKOOK PARK
  • Publication number: 20230326401
    Abstract: A display apparatus is disclosed. The display apparatus includes a display panel including first pixels and second pixels, and a display panel driver which drives the display panel. In a first mode, the display panel driver drives both the first pixels and the second pixels. In a second mode, the display panel driver drives the second pixels in a first part for one frame, and drives the first pixels in a second part for the one frame.
    Type: Application
    Filed: May 31, 2023
    Publication date: October 12, 2023
    Inventors: HYEONUK WON, DOHYUN KANG, JUNGKOOK PARK, DONGHAK PYO
  • Publication number: 20230316979
    Abstract: The gamma correction method for a display device measures a first driving current according to a first grayscale voltage corresponding to the low grayscale value, determines a predicted luminance based on a driving current-luminance calibration function and the first driving current, compares the predicted luminance and a first target luminance for the low grayscale value, determines a first offset value based on the first driving current and the first target luminance when the predicted luminance is different from the first target luminance, and corrects the first grayscale voltage based on the first offset value. That is, the gamma correction method may measure the driving current to perform gamma correction for the low grayscale value, and shorten a process time of the gamma correction compared to performing the gamma correction for the low grayscale value by measuring luminance.
    Type: Application
    Filed: January 19, 2023
    Publication date: October 5, 2023
    Inventors: MOONSANG HWANG, Donghak Pyo
  • Patent number: 11688335
    Abstract: A display apparatus is disclosed. The display apparatus includes a display panel including first pixels and second pixels, and a display panel driver which drives the display panel. In a first mode, the display panel driver drives both the first pixels and the second pixels. In a second mode, the display panel driver drives the second pixels in a first part for one frame, and drives the first pixels in a second part for the one frame.
    Type: Grant
    Filed: March 2, 2022
    Date of Patent: June 27, 2023
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hyeonuk Won, Dohyun Kang, Jungkook Park, Donghak Pyo
  • Patent number: 11538415
    Abstract: A clock and voltage generation circuit includes a voltage generator which generates a first gate high voltage, a first gate low voltage, a second gate high voltage, and a second gate low voltage, a first level shifter which generates a first gate clock signal which swings between the first gate high voltage and the first gate low voltage in synchronization with a gate pulse signal, and a second level shifter which generates a second gate clock signal which swings between the second gate high voltage and the second gate low voltage in synchronization with the gate pulse signal. The voltage generator lowers the second gate high voltage to a voltage level of a kickback reference voltage in response to a kickback signal, and the first gate low voltage and the second gate high voltage are gate-on voltages, and the first gate high voltage and the second gate low voltage are gate-off voltages.
    Type: Grant
    Filed: April 5, 2019
    Date of Patent: December 27, 2022
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Byunghyuk Shin, Soyoung Kim, Donghak Pyo
  • Publication number: 20220358875
    Abstract: A display apparatus is disclosed. The display apparatus includes a display panel including first pixels and second pixels, and a display panel driver which drives the display panel. In a first mode, the display panel driver drives both the first pixels and the second pixels. In a second mode, the display panel driver drives the second pixels in a first part for one frame, and drives the first pixels in a second part for the one frame.
    Type: Application
    Filed: March 2, 2022
    Publication date: November 10, 2022
    Inventors: HYEONUK WON, DOHYUN KANG, JUNGKOOK PARK, DONGHAK PYO
  • Publication number: 20210280136
    Abstract: A clock and voltage generation circuit includes a voltage generator which generates a first gate high voltage, a first gate low voltage, a second gate high voltage, and a second gate low voltage, a first level shifter which generates a first gate clock signal which swings between the first gate high voltage and the first gate low voltage in synchronization with a gate pulse signal, and a second level shifter which generates a second gate clock signal which swings between the second gate high voltage and the second gate low voltage in synchronization with the gate pulse signal. The voltage generator lowers the second gate high voltage to a voltage level of a kickback reference voltage in response to a kickback signal, and the first gate low voltage and the second gate high voltage are gate-on voltages, and the first gate high voltage and the second gate low voltage are gate-off voltages.
    Type: Application
    Filed: April 5, 2019
    Publication date: September 9, 2021
    Inventors: Byunghyuk SHIN, Soyoung KIM, Donghak PYO
  • Patent number: 8947470
    Abstract: In a display apparatus, a display panel is divided into dimming areas and a backlight device includes light source blocks providing light to the dimming areas. Average gray-scale values and maximum gray-scale values respectively corresponding to the dimming areas are generated based on image signals provided to the dimming areas. Whether the average gray-scale values and the maximum gray-scale values are respectively within first and second reference ranges are checked. One of at least two parameters is selected according to a checked result, and representative brightness values respectively corresponding to the dimming areas are determined using the selected parameter. Duty ratios of the light source blocks are controlled based on the representative brightness values. As a result, power consumption is reduced when applying a dimming device to the display apparatus.
    Type: Grant
    Filed: July 12, 2011
    Date of Patent: February 3, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Dae-Gwang Jang, Tae Kwon Jung, Donghak Pyo, Min Ha Keum, Hak-Mo Choi
  • Publication number: 20120162276
    Abstract: In a display apparatus, a display panel is divided into dimming areas and a backlight device includes light source blocks providing light to the dimming areas. Average gray-scale values and maximum gray-scale values respectively corresponding to the dimming areas are generated based on image signals provided to the dimming areas. Whether the average gray-scale values and the maximum gray-scale values are respectively within first and second reference ranges are checked. One of at least two parameters is selected according to a checked result, and representative brightness values respectively corresponding to the dimming areas are determined using the selected parameter. Duty ratios of the light source blocks are controlled based on the representative brightness values. As a result, power consumption is reduced when applying a dimming device to the display apparatus.
    Type: Application
    Filed: July 12, 2011
    Publication date: June 28, 2012
    Inventors: Dae-Gwang Jang, Tae Kwon Jung, Donghak Pyo, Min Ha Keum, Hak-Mo Choi