Patents by Inventor Changyong SUNG

Changyong SUNG 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).

  • Patent number: 9911391
    Abstract: An embodiment of the present invention provides a liquid crystal display including a liquid crystal panel having a display area and a non-display area; left and right common voltage lines connected to common voltage lines formed in the display area and located in the non-display area on the left and right sides of the display area; and a common voltage compensator that receives feedback common voltages from the left and right common voltage lines and outputs compensated common voltages based on the feedback common voltages, wherein the common voltage compensator divides the display area into a first display area and a second display area with respect to the center of the liquid crystal panel and performs different compensation to the first display area and the second display area.
    Type: Grant
    Filed: September 21, 2016
    Date of Patent: March 6, 2018
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Changyong Sung, Hyunmyoung Yoon, Sunwoo Park, Jonghee Park
  • Publication number: 20170011704
    Abstract: An embodiment of the present invention provides a liquid crystal display including a liquid crystal panel having a display area and a non-display area; left and right common voltage lines connected to common voltage lines formed in the display area and located in the non-display area on the left and right sides of the display area; and a common voltage compensator that receives feedback common voltages from the left and right common voltage lines and outputs compensated common voltages based on the feedback common voltages, wherein the common voltage compensator divides the display area into a first display area and a second display area with respect to the center of the liquid crystal panel and performs different compensation to the first display area and the second display area.
    Type: Application
    Filed: September 21, 2016
    Publication date: January 12, 2017
    Applicant: LG Display Co., Ltd.
    Inventors: Changyong SUNG, Hyunmyoung YOON, Sunwoo PARK, Jonghee PARK
  • Patent number: 9470944
    Abstract: An embodiment of the present invention provides a liquid crystal display including a liquid crystal panel having a display area and a non-display area; left and right common voltage lines connected to common voltage lines formed in the display area and located in the non-display area on the left and right sides of the display area; and a common voltage compensator that receives feedback common voltages from the left and right common voltage lines and outputs compensated common voltages based on the feedback common voltages, wherein the common voltage compensator divides the display area into a first display area and a second display area with respect to the center of the liquid crystal panel and performs different compensation to the first display area and the second display area.
    Type: Grant
    Filed: August 13, 2014
    Date of Patent: October 18, 2016
    Assignee: LG Display Co., Ltd.
    Inventors: Changyong Sung, Hyunmyoung Yoon, Sunwoo Park, Jonghee Park
  • Patent number: 8982115
    Abstract: A liquid crystal display device discharges residual charge within the liquid crystal display panel. The liquid crystal display device comprises pixels defined by gate lines and data lines intersecting with each other and switching elements for driving the plurality of pixels; a level shifter comprising a first transistor connected between a gate-on voltage terminal and an output terminal and a second transistor connected between a gate-off voltage terminal and the output terminal to selectively output either the gate-on voltage or gate-off voltage to the plurality of gate lines; and a discharge circuit forming a discharge path connecting the gate-off voltage terminal and the ground terminal. The second transistor is turned on during the power-on of the liquid crystal display panel to apply the gate-off voltage. The discharge circuit is turned on to discharge the residual charge of the liquid crystal display panel through the discharge path.
    Type: Grant
    Filed: December 12, 2012
    Date of Patent: March 17, 2015
    Assignee: LG Display Co., Ltd.
    Inventors: ChangYong Sung, SungJoon Moon, SeYeon Kim, SeongHun Choi
  • Publication number: 20150062471
    Abstract: An embodiment of the present invention provides a liquid crystal display including a liquid crystal panel having a display area and a non-display area; left and right common voltage lines connected to common voltage lines formed in the display area and located in the non-display area on the left and right sides of the display area; and a common voltage compensator that receives feedback common voltages from the left and right common voltage lines and outputs compensated common voltages based on the feedback common voltages, wherein the common voltage compensator divides the display area into a first display area and a second display area with respect to the center of the liquid crystal panel and performs different compensation to the first display area and the second display area.
    Type: Application
    Filed: August 13, 2014
    Publication date: March 5, 2015
    Inventors: Changyong SUNG, Hyunmyoung YOON, Sunwoo PARK, Jonghee PARK