Patents by Inventor Myeong Hak Lee

Myeong Hak Lee 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).

  • LED driving circuit, display panel, and pixel driving device
    Patent number: 11551606
    Abstract: Embodiments relate to display panel and pixel driving device techniques. A hybrid scheme is provided in that a PWM (pulse width modulation) scheme, in which a ramp voltage is supplied as a gate voltage of a transistor and an LED is turned off at a time point when the gate voltage becomes the same as a threshold voltage, and a PAM (pulse amplitude modulation) scheme, in which a start voltage of the ramp voltage is determined depending on a gray scale value of a pixel, are combined.
    Type: Grant
    Filed: December 8, 2021
    Date of Patent: January 10, 2023
    Assignee: LX Semicon Co., Ltd.
    Inventors: Kyoung Tae Kim, Myeong Hak Lee
  • LED Driving Circuit, Display Panel, and Pixel Driving Device
    Publication number: 20220199001
    Abstract: Embodiments relate to display panel and pixel driving device techniques. A hybrid scheme is provided in that a PWM (pulse width modulation) scheme, in which a ramp voltage is supplied as a gate voltage of a transistor and an LED is turned off at a time point when the gate voltage becomes the same as a threshold voltage, and a PAM (pulse amplitude modulation) scheme, in which a start voltage of the ramp voltage is determined depending on a gray scale value of a pixel, are combined.
    Type: Application
    Filed: December 8, 2021
    Publication date: June 23, 2022
    Inventors: Kyoung Tae Kim, Myeong Hak Lee