Patents by Inventor Oh Hyun Lee

Oh Hyun 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).

  • Patent number: 8638323
    Abstract: Disclosed is a system and method for correcting a gamma for shortening a gamma correction time period and improving gamma correction efficiency and reliability thereof, and simplifying a gamma correction device for reducing a production cost of image display devices.
    Type: Grant
    Filed: December 30, 2008
    Date of Patent: January 28, 2014
    Assignee: LG Display Co., Ltd.
    Inventors: Joo Hong Lee, Hong Sung Song, Oh Hyun Lee, Woong Ki Min
  • Patent number: 8605023
    Abstract: An apparatus and method for driving an LCD device is disclosed, in which an inversion method of an LCD panel is changed depending on a specific pattern of image data so as to improve picture quality of images displayed on the LCD panel. The apparatus for driving an LCD device includes an LCD panel displaying images, a polarity control signal generator comparing image data with pattern data previously stored for the unit of frame and generating a polarity control signal in accordance with the compared result, a data driver converting an inversion method in accordance with the polarity control signal and supplying the received image data to the LCD panel, a gate driver supplying scan pulses to the LCD panel, and a timing controller controlling the data driver and the gate driver.
    Type: Grant
    Filed: December 28, 2006
    Date of Patent: December 10, 2013
    Assignee: LG Display Co., Ltd.
    Inventors: Hong Sung Song, Oh Hyun Lee, Woong Ki Min, Hyuk Jin Kim
  • Publication number: 20110084956
    Abstract: Disclosed is a LCD device that includes a liquid crystal panel; a driving circuit including data and gate drivers, a timing controller to control the data and gate drivers, and a first power supplier to apply a first driving voltage to the data and gate drivers and the timing controller; a backlight unit disposed at the rear of the liquid crystal panel and including an LED array provided with a plurality of LEDs, an LED driver to apply driving signals to the LED array, and a second power supplier to apply a second driving voltage to the LED driver; and a printed circuit board connected to one edge of the liquid crystal panel and defined into first and second domains which are combined with each other.
    Type: Application
    Filed: September 14, 2010
    Publication date: April 14, 2011
    Inventors: Byung Jin CHOI, Oh Hyun LEE
  • Publication number: 20100073339
    Abstract: Disclosed is a system and method for correcting a gamma for shortening a gamma correction time period and improving gamma correction efficiency and reliability thereof, and simplifying a gamma correction device for reducing a production cost of image display devices.
    Type: Application
    Filed: December 30, 2008
    Publication date: March 25, 2010
    Inventors: Joo Hong Lee, Hong Sung Song, Oh Hyun Lee, Woong Ki Min
  • Patent number: 7586475
    Abstract: A circuit that drives a liquid crystal display device, includes an EEPROM having control data that over-drives and provides adaptive brightness intensification, the control data in the EEPROM is protected so as to secure reliability of the EEPROM. The circuit includes a master for over-driving and adaptive brightness intensification, a slave for providing control data to the master, a connector for connecting external writing equipment with terminals on the slave to write the control data into the slave, and an internal power supply of a liquid crystal module that applies an internal supply voltage to the slave. A write control terminal on the slave is grounded in a write mode, and connected to the internal power supply of the liquid crystal module in a liquid crystal module drive mode.
    Type: Grant
    Filed: June 30, 2005
    Date of Patent: September 8, 2009
    Assignee: LG. Display Co., Ltd.
    Inventors: Oh Hyun Lee, Sun Woo Kwag, Deuk Woo Lee
  • Patent number: 7446749
    Abstract: The method and apparatus for measuring response time of liquid crystal includes controlling temperature of a liquid crystal display panel, generating a liquid crystal driving signal having a variable voltage level that is changed according to a response property of the liquid crystal display panel and a target voltage level, and supplying the liquid crystal driving signal to the liquid crystal display panel, detecting the response property corresponding to the liquid crystal driving signal, and adjusting the variable voltage level until the response property reaches a desired level and setting a modulated data substantially equal to the variable voltage level when the response property reaches the desired level, the modulated data based on temperatures being determined by changing the temperature of the liquid crystal display panel. Also, method and apparatus for driving a LCD device using the above-described method.
    Type: Grant
    Filed: June 24, 2004
    Date of Patent: November 4, 2008
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Oh Hyun Lee, Don Gyou Lee, Jung Ho Kil
  • Publication number: 20080001890
    Abstract: An apparatus and method for driving an LCD device is disclosed, in which an inversion method of an LCD panel is changed depending on a specific pattern of image data so as to improve picture quality of images displayed on the LCD panel. The apparatus for driving an LCD device includes an LCD panel displaying images, a polarity control signal generator comparing image data with pattern data previously stored for the unit of frame and generating a polarity control signal in accordance with the compared result, a data driver converting an inversion method in accordance with the polarity control signal and supplying the received image data to the LCD panel, a gate driver supplying scan pulses to the LCD panel, and a timing controller controlling the data driver and the gate driver.
    Type: Application
    Filed: December 28, 2006
    Publication date: January 3, 2008
    Inventors: Hong Sung Song, Oh Hyun Lee, Woong Ki Min, Hyuk Jin Kim
  • Publication number: 20040263450
    Abstract: The method and apparatus for measuring response time of liquid crystal includes controlling temperature of a liquid crystal display panel, generating a liquid crystal driving signal having a variable voltage level that is changed according to a response property of the liquid crystal display panel and a target voltage level, and supplying the liquid crystal driving signal to the liquid crystal display panel, detecting the response property corresponding to the liquid crystal driving signal, and adjusting the variable voltage level until the response property reaches a desired level and setting a modulated data substantially equal to the variable voltage level when the response property reaches the desired level, the modulated data based on temperatures being determined by changing the temperature of the liquid crystal display panel. Also, method and apparatus for driving a LCD device using the above-described method.
    Type: Application
    Filed: June 24, 2004
    Publication date: December 30, 2004
    Applicant: LG Philips LCD Co., Ltd.
    Inventors: Oh Hyun Lee, Don Gyou Lee, Jung Ho Kil