Patents by Inventor Young-Gil Kim

Young-Gil Kim 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: 8730227
    Abstract: In a driving device, a liquid crystal display having the driving device, and a method of driving the liquid crystal display, the driving device includes a signal controller, a voltage selector, a gray-scale voltage generator, and a data driver. The signal controller outputs a power-down signal indicating an imminent power-off. The voltage selector outputs a common voltage in response to the signal. The gray-scale voltage generator receives the common voltage to generate common gray-scale voltages having a same voltage level as that of the common voltage. The data driver generates common data voltages based on the common gray-scale voltages. The driving device controls a display panel so that the display panel displays a white image in response to the signal. Thus, an after-image after the power-off is removed, therefore improving the display quality of the display panel.
    Type: Grant
    Filed: June 2, 2008
    Date of Patent: May 20, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Kyung-Hun Lee, Young-Gil Kim, Kyeong-Sik Cho, So-Yeon Yi
  • Publication number: 20140054564
    Abstract: Provided is an organic electroluminescent device that exhibits an efficient host-dopant energy transfer mechanism, and thus, expresses a certain high-efficiency electroluminescent performance, based on improved electron density distribution. The organic electroluminescent device also overcomes low initial efficiency and short operation life property, and secures high-performance electroluminescent performance with high efficiency and long life property for each color.
    Type: Application
    Filed: July 29, 2011
    Publication date: February 27, 2014
    Applicant: ROHM AND HAAS ELECTRONIC MATERIALS KOREA LTD.
    Inventors: Chi-Sik Kim, Soo-Young Lee, Young-Gil Kim, Hyo-Jung Lee, Su-Hyun Lee, Hyun Kim, Young-Jun Cho, Hyuck-Joo Kwon, Kyung-Joo Lee, Bong-Ok Kim, Sung-Min Kim
  • Patent number: 8464126
    Abstract: Two hybrid message decoders for low-density parity-check (LDPC) codes are proposed. One decoder uses a posteriori probability ratio (APPR) and a posteriori probability difference (APPD), and the other decoder uses a logarithm a posteriori probability ratio (LAPPR) and a logarithm a posteriori probability difference (LAPPD) as hybrid message. Since the variable node and check node processing can be readily done using APPR and APPD, respectively, the proposed decoders have lower complexity than the conventional decoder that uses LAPPR only as a message.
    Type: Grant
    Filed: August 19, 2008
    Date of Patent: June 11, 2013
    Assignee: The Governors of the University of Alberta
    Inventors: Young Gil Kim, Norman C. Beaulieu
  • Publication number: 20120206037
    Abstract: Provided are a novel organic electroluminescent compound and an organic electroluminescent device using the same. When used as a host material of an organic electroluminescent material of an OLED device, the organic electroluminescent compound disclosed herein exhibits good luminous efficiency and excellent life property as compared to the existing host material. Therefore, it may be used to manufacture OLEDs having very superior operation life.
    Type: Application
    Filed: July 19, 2010
    Publication date: August 16, 2012
    Applicant: Rohm and Haas Electronic Materials Korea Ltd
    Inventors: Soo Young Lee, Young Gil Kim, Youngg Jun Cho, Hyuck Joo Kwon, Bong Ok Kim, Sung Min Kim, Seung Soo Yoon
  • Publication number: 20120192651
    Abstract: Multi probe unit for an ultrasonic flaw detection apparatus, includes a plurality of probes contacting a surface of an object to be inspected; a plurality of connection members connecting two neighbor probes of the plurality of probes with each other; support members disposed on top portions of the plurality of probes so as to be spaced apart from the plurality of probes; and a pressing member connecting the plurality of probes with the support member and pressing the plurality of probes to the object to be inspected. According to the present invention, a plurality of probes smoothly contacts a flexural surface of an object to be inspected.
    Type: Application
    Filed: September 1, 2010
    Publication date: August 2, 2012
    Applicants: INDE SYSTEM CO., LTD., KOREA RESEARCH INSTITUTE OF STANDARDS AND SCIENCE
    Inventors: Seung Seok Lee, Ki Bok Kim, Young Gil Kim, Hyun Jae Shin, You Hyun Jang
  • Publication number: 20120091885
    Abstract: Disclosed are novel organic electroluminescent compounds and organic electroluminescent devices comprising the same. With good luminous efficiency and excellent life property, the disclosed organic electroluminescent compounds can be used to manufacture OLED devices having very good operation life.
    Type: Application
    Filed: March 29, 2010
    Publication date: April 19, 2012
    Applicant: Rohm and Haas Electronic Materials Korea Let.
    Inventors: Young Gil Kim, Young Jun Chop, Hyuck Joo Kwon, Bong Ok Kim, Sung Min Kim, Seung Soo Yoon
  • Patent number: 7928752
    Abstract: A display device testing system and a method for testing a display device using the same, which are capable of testing whether a display panel is defective or not according to a variation of the frame frequency and whether the driver module operates normally or not even at a voltage higher than a normal operation voltage. The display device testing system includes a display panel including a plurality of gate lines; a driver module including a gate driver unit for sequentially supplying a gate voltage to the plurality of gate lines in response to a test, vertical synchronization start signal; and a testing module for supplying a test vertical synchronization start signal to the driver module.
    Type: Grant
    Filed: March 1, 2007
    Date of Patent: April 19, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sang Jun Lee, Young Gil Kim
  • Publication number: 20110041032
    Abstract: Two hybrid message decoders for low-density parity-check (LDPC) codes are proposed. One decoder uses a posteriori probability ratio (APPR) and a posteriori probability difference (APPD), and the other decoder uses a logarithm a posteriori probability ratio (LAPPR) and a logarithm a posteriori probability difference (LAPPD) as hybrid message. Since the variable node and check node processing can be readily done using APPR and APPD, respectively, the proposed decoders have lower complexity than the conventional decoder that uses LAPPR only as a message.
    Type: Application
    Filed: August 19, 2008
    Publication date: February 17, 2011
    Applicant: THE GOVERNORS OF THE UNIVERSITY OF ALBERTA
    Inventors: Young Gil Kim, Norman C. Beaulieu
  • Publication number: 20100108997
    Abstract: Provided are novel organic electroluminescent compounds, and organic electroluminescent devices comprising the same as electroluminescent material. Specifically, the organic electroluminescent compounds according to the present invention are represented by Chemical Formula (1): wherein, at least one substituent(s) among Ar1, Ar2, R6, R7, R8, R9, R10, R11, R12, R13, R14 and R15 represent(s) The organic electroluminescent compounds according to the present invention exhibit high luminous efficiency and excellent life property of material, so that an OLED having very good operation life can be manufactured therefrom. Further, the organic electroluminescent compound according to the present invention, when it is contained in an electroluminescent layer or a hole transport layer, lowers the operation voltage to result in noticeable decrease in power consumption, with exhibiting at least comparable luminous efficiency as compared to conventional OLED's.
    Type: Application
    Filed: October 13, 2009
    Publication date: May 6, 2010
    Applicant: Gracel Display Inc.
    Inventors: Young Gil Kim, Young Jun Cho, Chi Sik Kim, Sung Jin Eum, Hyuck Joo Kwon, Bong Ok Kim, Sung Min Kim, Seung Soo Yoon
  • Patent number: 7705589
    Abstract: A sensor for detecting surface defects of a metal tube solves a problem of a conventional eddy current probe in that it is difficult to detect a crack in the circumferential direction of a metal tube. The sensor includes a plurality of coils wound at a predetermined inclined angle. The plurality of coils is inserted into the inside of a metal tube. Alternating current is applied to the coils to measure a change in impedance of the coils due to a change in an eddy current generated in the metal tube, thus detecting a surface defect of the metal tube.
    Type: Grant
    Filed: February 19, 2008
    Date of Patent: April 27, 2010
    Assignee: Korea Research Institute of Standards and Science
    Inventors: Young Joo Kim, Bong Young Ahn, Seung Seok Lee, Young Gil Kim, Dong Jin Yoon
  • Publication number: 20100072888
    Abstract: Provided are a novel organic electroluminescent compound and an organic electroluminescent device using the same as an electroluminescent material.
    Type: Application
    Filed: September 3, 2009
    Publication date: March 25, 2010
    Applicant: Gracel Display Inc.
    Inventors: Young Gil Kim, Young Jun Cho, Chi Sik Kim, Sung Jin Eum, Hyuck Joo Kwon, Bong Ok Kim, Sung Min Kim, Seung Soo Yoon
  • Publication number: 20090206830
    Abstract: Disclosed herein is a sensor for detecting surface defects of a metal tube, which can solve a problem of a conventional eddy current probe in that it is difficult to detect a crack in the circumferential direction of a metal tube. For this purpose, the present provides a sensor for detecting surface defects of a metal tube, the sensor including a plurality of coils wound at a predetermined inclined angle, wherein the plurality of coils is inserted into the inside of a metal tube and an alternating current is applied to the coils to measure a change in impedance of the coils due to a change in an eddy current generated in the metal tube, thus detecting a surface defect of the metal tube.
    Type: Application
    Filed: February 19, 2008
    Publication date: August 20, 2009
    Inventors: Young Joo KIM, Bong Young Ahn, Seung Seok Lee, Young Gil Kim, Dong Jin Yoon
  • Publication number: 20090079716
    Abstract: A display device includes a timing controller, a noise removing part, a data driving part and a gate driving part. The timing controller outputs image data and a data clock having a pair of differential signals. The noise removing part is connected to a pair of output terminals for outputting the pair of differential signals. The noise removing part removes common-mode noise included in the pair of differential signals. The data driving part generates an image data signal using the image data and the data clock, and outputs the image data signal to a data line on a display panel. The gate driving part generates a gate signal, and outputs the gate signal to a gate line on the display panel.
    Type: Application
    Filed: August 21, 2008
    Publication date: March 26, 2009
    Inventors: Jong-Tae Kim, Ki-Hyun Hong, Young-Gil Kim
  • Publication number: 20090040244
    Abstract: In a driving device, a liquid crystal display having the driving device, and a method of driving the liquid crystal display, the driving device includes a signal controller, a voltage selector, a gray-scale voltage generator, and a data driver. The signal controller outputs a power-down signal indicating an imminent power-off. The voltage selector outputs a common voltage in response to the signal. The gray-scale voltage generator receives the common voltage to generate common gray-scale voltages having a same voltage level as that of the common voltage. The data driver generates common data voltages based on the common gray-scale voltages. The driving device controls a display panel so that the display panel displays a white image in response to the signal. Thus, an after-image after the power-off is removed, therefore improving the display quality of the display panel.
    Type: Application
    Filed: June 2, 2008
    Publication date: February 12, 2009
    Inventors: Kyung-Hun Lee, Young-Gil Kim, Kyeong-Sik Cho, So-Yeon Yi
  • Publication number: 20080211792
    Abstract: A liquid crystal display includes a plurality of gate lines and a plurality of data lines crossing over the gate lines while being electrically insulated from the gate lines. Pixels are placed at the cross regions of the gate and the data lines arranged in a matrix form. Each pixel has a switching circuit connected to the gate and the data lines. Data voltages are fed to the pixels such that the polarity of the pixels is inverted per a pixel group of two or more pixel rows. Gate voltages are applied to the neighboring first and second pixel groups such that the gate voltage applied to the pixel row of the first pixel group close to the second pixel group differs from the gate voltage applied to the pixel row of the first pixel group distant to the second pixel group.
    Type: Application
    Filed: November 28, 2007
    Publication date: September 4, 2008
    Inventors: Hyun-Su Lee, Young-Gil Kim, Byoung-Jun Lee, Jun-Pyo Lee
  • Patent number: 7417612
    Abstract: A gamma voltage generator for a liquid crystal display (LCD) capable of removing residual images by compensating a gamma voltage is presented. The gamma voltage generation apparatus adjusts the common voltage by the kickback voltage for the intermediate gray level, and tunes the gamma voltages other than the intermediate gray level gamma voltage. The adjustment of the gamma voltages other than the intermediate gray level gamma voltage is achieved in such a manner that the difference between the intermediate gray level kickback voltage and the kickback voltage at one of the gray levels other than the intermediate gray level is equal to half of the difference between the sum of the two inverted gamma voltages representing the intermediate gray level gamma voltages and the sum of the two inverted gamma voltages corresponding to the selected gray level.
    Type: Grant
    Filed: February 27, 2007
    Date of Patent: August 26, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hyun-Su Lee, Byoung-Jun Lee, Jun-Pyo Lee, Young-Gil Kim, Hoi-Sik Moon
  • Publication number: 20080106666
    Abstract: A liquid crystal display capable of preventing a residual image phenomenon from occurring after power is cut off. The liquid crystal display includes: a voltage generating unit outputting a gate-on voltage to a first output node, outputting a gate-off voltage to a second output node, and pulling up the voltage level of the second output node to a level of a positive discharge voltage after a power supply voltage is cut off; a gate driving unit sequentially supplying the gate-on voltage and the gate-off voltage; a data driving unit supplying an image data voltage; and a liquid crystal panel including a plurality of pixels that are turned on or off according to the gate-on voltage or the gate-off voltage, so as to display an image corresponding to the image data voltage.
    Type: Application
    Filed: October 24, 2007
    Publication date: May 8, 2008
    Inventors: Yo-han Lee, Young-gil Kim, Seoung-bum Pyoun, Sung-hee Lee, Sang-iun Lee
  • Publication number: 20080036715
    Abstract: A display device testing system and a method for testing a display device using the same, which are capable of testing whether a display panel is defective or not according to a variation of the frame frequency and whether the driver module operates normally or not even at a voltage higher than a normal operation voltage. The display device testing system includes a display panel including a plurality of gate lines; a driver module including a gate driver unit for sequentially supplying a gate voltage to the plurality of gate lines in response to a test, vertical synchronization start signal; and a testing module for supplying a test vertical synchronization start signal to the driver module.
    Type: Application
    Filed: March 1, 2007
    Publication date: February 14, 2008
    Inventors: Sang Jun Lee, Young Gil Kim
  • Patent number: 7321352
    Abstract: A liquid crystal display includes a plurality of gate lines and a plurality of data lines crossing over the gate lines while being electrically insulated from the gate lines. Pixels are placed at the cross regions of the gate and the data lines arranged in a matrix form. Each pixel has a switching circuit connected to the gate and the data lines. Data voltages are fed to the pixels such that the polarity of the pixels is inverted per a pixel group of two or more pixel rows. Gate voltages are applied to the neighboring first and second pixel groups such that the gate voltage applied to the pixel row of the first pixel group close to the second pixel group differs from the gate voltage applied to the pixel row of the first pixel group distant to the second pixel group.
    Type: Grant
    Filed: May 3, 2002
    Date of Patent: January 22, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hyun-Su Lee, Young-Gil Kim, Byoung-Jun Lee, Jun-Pyo Lee
  • Publication number: 20070211006
    Abstract: A gamma voltage generator for a liquid crystal display (LCD) capable of removing residual images by compensating a gamma voltage is presented. The gamma voltage generation apparatus adjusts the common voltage by the kickback voltage for the intermediate gray level, and tunes the gamma voltages other than the intermediate gray level gamma voltage. The adjustment of the gamma voltages other than the intermediate gray level gamma voltage is achieved in such a manner that the difference between the intermediate gray level kickback voltage and the kickback voltage at one of the gray levels other than the intermediate gray level is equal to half of the difference between the sum of the two inverted gamma voltages representing the intermediate gray level gamma voltages and the sum of the two inverted gamma voltages corresponding to the selected gray level.
    Type: Application
    Filed: February 27, 2007
    Publication date: September 13, 2007
    Inventors: Hyun-Su Lee, Byoung-Jun Lee, Jun-Pyo Lee, Young-Gil Kim, Hoi-Sik Moon