Patents by Inventor Kyohyuck Choo

Kyohyuck Choo 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: 8842138
    Abstract: Disclosed are a liquid crystal display and a method of the liquid crystal display. The liquid crystal display includes a liquid crystal panel, a backlight unit that supplies light to the liquid crystal panel and has a plurality of light sources, and an image calibration unit that calculates a global dimming resultant value and a local dimming resultant value for an image data signal inputted to the liquid crystal panel, analyzes an average picture level for each block with respect to the image data signal, and determines a convex combination parameter based on the global dimming resultant value, the local dimming resultant value, and the average picture level to generate a calibration dimming value for the backlight unit and an image calibration value for the image data signal.
    Type: Grant
    Filed: July 2, 2010
    Date of Patent: September 23, 2014
    Assignee: LG Display Co., Ltd.
    Inventors: Junghwan Lee, Euiyeol Oh, Kyungjoon Kwon, Kyohyuck Choo, Changkyun Park
  • Patent number: 8432370
    Abstract: A liquid crystal display is disclosed. The liquid crystal display includes a liquid crystal display panel including a pixel array and touch sensors, a transparent conductive layer on one substrate of the liquid crystal display panel transmitting display light, a polarizing plate on the transparent conductive layer, a driving voltage supply circuit, and a signal transmitting unit electrically connecting the transparent conductive layer to the driving voltage supply circuit. A portion of the transparent conductive layer is connected to a ground level voltage source. The driving voltage supply circuit generates a driving voltage required to perform light sensing operations of the touch sensors during a touch period based on changes in an amount of surface charge of the transparent conductive layer depending on whether or not the polarizing plate is touched.
    Type: Grant
    Filed: April 20, 2012
    Date of Patent: April 30, 2013
    Assignee: LG Display Co., Ltd.
    Inventors: Changkeun Park, Suhwan Moon, Minkyung Lee, Deuksu Lee, Taehwan Kim, Miyoung Do, Kyohyuck Choo, Ilho Kim, Shinkwon Park
  • Patent number: 8427448
    Abstract: A liquid crystal display is disclosed. The liquid crystal display includes a liquid crystal display panel including a pixel array and touch sensors, a transparent conductive layer on one substrate of the liquid crystal display panel transmitting display light, a polarizing plate on the transparent conductive layer, a driving voltage supply circuit, and a signal transmitting unit electrically connecting the transparent conductive layer to the driving voltage supply circuit. A portion of the transparent conductive layer is connected to a ground level voltage source. The driving voltage supply circuit generates a driving voltage required to perform light sensing operations of the touch sensors during a touch period based on changes in an amount of surface charge of the transparent conductive layer depending on whether or not the polarizing plate is touched.
    Type: Grant
    Filed: April 20, 2012
    Date of Patent: April 23, 2013
    Assignee: LG Display Co., Ltd.
    Inventors: Changkeun Park, Suhwan Moon, Minkyung Lee, Deuksu Lee, Taehwan Kim, Miyoung Do, Kyohyuck Choo, Ilho Kim, Shinkwon Park
  • Patent number: 8355006
    Abstract: A liquid crystal display is disclosed. The liquid crystal display includes a liquid crystal display panel including a pixel array and touch sensors, a transparent conductive layer on one substrate of the liquid crystal display panel transmitting display light, a polarizing plate on the transparent conductive layer, a driving voltage supply circuit, and a signal transmitting unit electrically connecting the transparent conductive layer to the driving voltage supply circuit. A portion of the transparent conductive layer is connected to a ground level voltage source. The driving voltage supply circuit generates a driving voltage required to perform light sensing operations of the touch sensors during a touch period based on changes in an amount of surface charge of the transparent conductive layer depending on whether or not the polarizing plate is touched.
    Type: Grant
    Filed: December 29, 2008
    Date of Patent: January 15, 2013
    Assignee: LG Display Co., Ltd.
    Inventors: Changkeun Park, Suhwan Moon, Minkyung Lee, Deuksu Lee, Taehwan Kim, Miyoung Do, Kyohyuck Choo, Ilho Kim, Shinkwon Park
  • Publication number: 20120206411
    Abstract: A liquid crystal display is disclosed. The liquid crystal display includes a liquid crystal display panel including a pixel array and touch sensors, a transparent conductive layer on one substrate of the liquid crystal display panel transmitting display light, a polarizing plate on the transparent conductive layer, a driving voltage supply circuit, and a signal transmitting unit electrically connecting the transparent conductive layer to the driving voltage supply circuit. A portion of the transparent conductive layer is connected to a ground level voltage source. The driving voltage supply circuit generates a driving voltage required to perform light sensing operations of the touch sensors during a touch period based on changes in an amount of surface charge of the transparent conductive layer depending on whether or not the polarizing plate is touched.
    Type: Application
    Filed: April 20, 2012
    Publication date: August 16, 2012
    Inventors: Changkeun Park, Suhwan Moon, Minkyung Lee, Deuksu Lee, Taehwan Kim, Miyoung Do, Kyohyuck Choo, Ilho Kim, Shinkwon Park
  • Publication number: 20120206412
    Abstract: A liquid crystal display is disclosed. The liquid crystal display includes a liquid crystal display panel including a pixel array and touch sensors, a transparent conductive layer on one substrate of the liquid crystal display panel transmitting display light, a polarizing plate on the transparent conductive layer, a driving voltage supply circuit, and a signal transmitting unit electrically connecting the transparent conductive layer to the driving voltage supply circuit. A portion of the transparent conductive layer is connected to a ground level voltage source. The driving voltage supply circuit generates a driving voltage required to perform light sensing operations of the touch sensors during a touch period based on changes in an amount of surface charge of the transparent conductive layer depending on whether or not the polarizing plate is touched.
    Type: Application
    Filed: April 20, 2012
    Publication date: August 16, 2012
    Inventors: Changkeun Park, Suhwan Moon, Minkyung Lee, Deuksu Lee, Taehwan Kim, Miyoung Do, Kyohyuck Choo, Ilho Kim, Shinkwon Park
  • Publication number: 20110122168
    Abstract: Disclosed are a liquid crystal display and a method of the liquid crystal display. The liquid crystal display includes a liquid crystal panel, a backlight unit that supplies light to the liquid crystal panel and has a plurality of light sources, and an image calibration unit that calculates a global dimming resultant value and a local dimming resultant value for an image data signal inputted to the liquid crystal panel, analyzes an average picture level for each block with respect to the image data signal, and determines a convex combination parameter based on the global dimming resultant value, the local dimming resultant value, and the average picture level to generate a calibration dimming value for the backlight unit and an image calibration value for the image data signal.
    Type: Application
    Filed: July 2, 2010
    Publication date: May 26, 2011
    Inventors: Junghwan LEE, Euiyeol OH, Kyungjoon KWON, Kyohyuck CHOO, Changkyun PARK
  • Publication number: 20090315840
    Abstract: A liquid crystal display is disclosed. The liquid crystal display includes a liquid crystal display panel including a pixel array and touch sensors, a transparent conductive layer on one substrate of the liquid crystal display panel transmitting display light, a polarizing plate on the transparent conductive layer, a driving voltage supply circuit, and a signal transmitting unit electrically connecting the transparent conductive layer to the driving voltage supply circuit. A portion of the transparent conductive layer is connected to a ground level voltage source. The driving voltage supply circuit generates a driving voltage required to perform light sensing operations of the touch sensors during a touch period based on changes in an amount of surface charge of the transparent conductive layer depending on whether or not the polarizing plate is touched.
    Type: Application
    Filed: December 29, 2008
    Publication date: December 24, 2009
    Inventors: Changkeun Park, Suhwan Moon, Minkyung Lee, Deuksu Lee, Taehwan Kim, Miyoung Do, Kyohyuck Choo, Ilho Kim, Shinkwon Park