Patents by Inventor Sang-Hak Yi

Sang-Hak Yi 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).

  • Apparatuses for generating analog driving voltages and common electrode voltages and methods of controlling the analog driving voltages and the common electrode voltages
    Patent number: 7821512
    Abstract: In apparatus for generating an analog driving voltage, a ripple amplitude determining unit compares the analog driving voltage with a reference voltage to determine a ripple level of the analog driving voltage and an analog driving voltage generating unit adjusts an analog driving voltage level based on the determined ripple level. In an apparatus for generating a common electrode voltage, a common electrode voltage ripple detecting unit compares ripple amplitude of the common electrode voltage with a ripple reference voltage to generate a common electrode voltage control signal and a common electrode voltage generating unit controls the common electrode voltage level based on the common electrode voltage control signal. Therefore, the analog driving voltage and the common electrode voltage are adjusted to appropriate voltage levels for reducing current consumption and flicker.
    Type: Grant
    Filed: June 23, 2005
    Date of Patent: October 26, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Sang-Hak Yi
  • DATA DRIVER INTEGRATED CIRCUIT DEVICE, LIQUID CRYSTAL DISPLAY INCLUDING THE SAME AND METHOD OF DATA-DRIVING LIQUID CRYSTAL DISPLAY
    Publication number: 20070120805
    Abstract: A data driver integrated circuit device includes a gamma decoding unit that receives differential gamma data transmitted by a timing controller and decodes the received differential gamma data, a digital-to-analog conversion (DAC) unit that converts the decoded differential gamma data into analog voltage values, land a buffer unit that amplifies the analog voltage values and outputs the amplified values.
    Type: Application
    Filed: November 15, 2006
    Publication date: May 31, 2007
    Inventor: Sang-hak Yi
  • Apparatuses for generating analog driving voltages and common electrode voltages and methods of controlling the analog driving voltages and the common electrode voltages
    Publication number: 20060050042
    Abstract: In apparatus for generating an analog driving voltage, a ripple amplitude determining unit compares the analog driving voltage with a reference voltage to determine a ripple level of the analog driving voltage and an analog driving voltage generating unit adjusts an analog driving voltage level based on the determined ripple level. In an apparatus for generating a common electrode voltage, a common electrode voltage ripple detecting unit compares ripple amplitude of the common electrode voltage with a ripple reference voltage to generate a common electrode voltage control signal and a common electrode voltage generating unit controls the common electrode voltage level based on the common electrode voltage control signal. Therefore, the analog driving voltage and the common electrode voltage are adjusted to appropriate voltage levels for reducing current consumption and flicker.
    Type: Application
    Filed: June 23, 2005
    Publication date: March 9, 2006
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Sang-Hak Yi