Patents by Inventor HYUNGRAE NAM

HYUNGRAE NAM 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).

  • Reference voltage generator, display device including the same, and method of driving display device
    Patent number: 11741868
    Abstract: Provided is a display device which comprises a display panel including a plurality of pixels displaying an image based on a driving voltage, a reference voltage generator converting a sensing driving voltage generated by measuring the driving voltage into a sensing driving current, converting a preset reference driving voltage into a reference driving current, comparing the sensing driving current and the reference driving current, and generating a first reference voltage and a second reference voltage based on a difference between the sensing driving current and the reference driving current, a gamma voltage generator generating a plurality of gamma voltages by dividing the first reference voltage and the second reference voltage, and a data driver converting image data into a data voltage based on the gamma voltages and providing the data voltage to each of the pixels.
    Type: Grant
    Filed: October 11, 2022
    Date of Patent: August 29, 2023
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hyungrae Nam, Jin-Taek Hong
  • REFERENCE VOLTAGE GENERATOR, DISPLAY DEVICE INCLUDING THE SAME, AND METHOD OF DRIVING DISPLAY DEVICE
    Publication number: 20230230514
    Abstract: Provided is a display device which comprises a display panel including a plurality of pixels displaying an image based on a driving voltage, a reference voltage generator converting a sensing driving voltage generated by measuring the driving voltage into a sensing driving current, converting a preset reference driving voltage into a reference driving current, comparing the sensing driving current and the reference driving current, and generating a first reference voltage and a second reference voltage based on a difference between the sensing driving current and the reference driving current, a gamma voltage generator generating a plurality of gamma voltages by dividing the first reference voltage and the second reference voltage, and a data driver converting image data into a data voltage based on the gamma voltages and providing the data voltage to each of the pixels.
    Type: Application
    Filed: October 11, 2022
    Publication date: July 20, 2023
    Inventors: HYUNGRAE NAM, JIN-TAEK HONG
  • Power voltage generator including charge pump, display apparatus including the same and method of generating power voltage using the same
    Patent number: 11694632
    Abstract: A power voltage generator includes a charge pump and a regulator. The charge pump generates a charge pumping voltage. The charge pumping voltage has a headroom margin which is automatically set. The charge pumping voltage is varied based on a target voltage. The regulator generates a power voltage based on the charge pumping voltage.
    Type: Grant
    Filed: February 11, 2021
    Date of Patent: July 4, 2023
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Yanguk Nam, Hyungrae Nam
  • POWER VOLTAGE GENERATOR, DISPLAY APPARATUS INCLUDING THE SAME AND METHOD OF GENERATING POWER VOLTAGE USING THE SAME
    Publication number: 20210335281
    Abstract: A power voltage generator includes a charge pump and a regulator. The charge pump generates a charge pumping voltage. The charge pumping voltage has a headroom margin which is automatically set. The charge pumping voltage is varied based on a target voltage. The regulator generates a power voltage based on the charge pumping voltage.
    Type: Application
    Filed: February 11, 2021
    Publication date: October 28, 2021
    Inventors: YANGUK NAM, HYUNGRAE NAM