Patents by Inventor Hynwoo Nho

Hynwoo Nho 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).

  • Systems and methods for driving an electronic display using a ramp DAC
    Patent number: 10715168
    Abstract: A display device may include rows of pixels that displays image data on a display, data lines coupled to the rows of pixels, and a digital-to-analog converter (DAC) that outputs a ramp voltage signal including a data voltage to be depicted on a first pixel of the rows of pixels. The display device may also include a capacitor that receives the ramp voltage signal via the DAC and a circuit that sends a control signal to a circuit component that causes the DAC to couple to the capacitor via one of the data lines for a duration of time that comprises a first time when the ramp voltage signal is below the data voltage and a second time when the ramp voltage signal is approximately equal to the data voltage. The capacitor is coupled to the DAC when the ramp voltage signal is greater than zero.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: July 14, 2020
    Assignee: Apple Inc.
    Inventors: Adam Adjiwibawa, David W. Lum, Wonjae Choi, Hynwoo Nho, Hopil Bae, Injae Hwang, Bryce T. Bradford, Jie Won Ryu, Hung Sheng Lin
  • SYSTEMS AND METHODS FOR DRIVING AN ELECTRONIC DISPLAY USING A RAMP DAC
    Publication number: 20180337687
    Abstract: A display device may include rows of pixels that displays image data on a display, data lines coupled to the rows of pixels, and a digital-to-analog converter (DAC) that outputs a ramp voltage signal including a data voltage to be depicted on a first pixel of the rows of pixels. The display device may also include a capacitor that receives the ramp voltage signal via the DAC and a circuit that sends a control signal to a circuit component that causes the DAC to couple to the capacitor via one of the data lines for a duration of time that comprises a first time when the ramp voltage signal is below the data voltage and a second time when the ramp voltage signal is approximately equal to the data voltage. The capacitor is coupled to the DAC when the ramp voltage signal is greater than zero.
    Type: Application
    Filed: May 19, 2017
    Publication date: November 22, 2018
    Inventors: Adam Adjiwibawa, David W. Lum, Wonjae Choi, Hynwoo Nho, Hopil Bae, Injae Hwang, Bryce T. Bradford, Jie Won Ryu, Hung Sheng Lin