Patents by Inventor Yong-Woo Choi

Yong-Woo Choi 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: 8597973
    Abstract: Discussed are an ink containing nanoparticles for formation of thin film of a solar cell and its preparation method, CIGS thin film solar cell having at least one light absorption layer formed by coating or printing the above ink containing nanoparticles on a rear electrode, and a process for manufacturing the same. More particularly, the above absorption layer includes Cu, In, Ga and Se elements as constitutional ingredients thereof and such elements exist in the light absorption layer by coating or printing an ink that contains Cu2Se nanoparticles and (In,Ga)2Se3 nanoparticles on the rear electrode, and heating the treated electrode with the ink. Since Cu(In,Ga)Se2 (CIGS) thin film is formed using the ink containing nanoparticles, a simple process is used without requirement of vacuum processing or complex equipment and particle size of the thin film, Ga doping concentration, etc., can be easily regulated.
    Type: Grant
    Filed: December 27, 2011
    Date of Patent: December 3, 2013
    Assignee: LG Electronics Inc.
    Inventors: Young-Ho Choe, Young-Hee Lee, Yong-Woo Choi, Hyung-Seok Kim, Ho-Gyoung Kim
  • Publication number: 20130141479
    Abstract: Disclosed are method and circuit for synchronizing input and output synchronization signals, which can synchronize an output synchronization signal based on frequency change of an input synchronization signal and limit input and output periods, thereby preventing flickering, a backlight driver of a liquid crystal display device using the same, and a method for driving the backlight driver. The method for synchronizing input and output synchronization signals, includes generating an output synchronization signal whose output period is set based on a comparison result between an input period of an input synchronization signal and a previous output period of the output synchronization signal, and limiting the output period of the output synchronization signal within a predefined limit range from the previous output period.
    Type: Application
    Filed: August 13, 2012
    Publication date: June 6, 2013
    Inventor: Yong-Woo Choi
  • Patent number: 8319929
    Abstract: A liquid crystal display with two insulating substrates. A first insulating substrate has crossing signal lines, a pixel electrode, and a drain electrode electrically connected to the pixel electrode through a contact hole. A spacer is formed on the first signal line of the first insulating substrate, and is wider at a first portion close to the first insulating substrate than at a second portion close to the second insulating substrate, and the drain electrode comprises a first portion and a second portion extending in a different direction with respect to the first portion.
    Type: Grant
    Filed: August 2, 2011
    Date of Patent: November 27, 2012
    Assignee: Samsung Display Co., Ltd.
    Inventors: Joong-Hyun Mun, Jang-Kun Song, Yong-Woo Choi, Bo-Sung Kim, Kwan-Wook Jung, Jung-Ho Lee, Hyo-Rak Nam
  • Publication number: 20120273784
    Abstract: A transfer layer includes a transparent substrate. A buffer layer is formed on the transparent substrate that comprises PbO, GaN, PbTiO3, La0.5Sr0.5CoO3 (LSCO), or LaxPb1-xCoO3 (LPCO) so that separation between the buffer layer and the transparent substrate occurs at substantially high temperatures.
    Type: Application
    Filed: June 27, 2012
    Publication date: November 1, 2012
    Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY
    Inventors: Il-Doo Kim, Harry L. Tuller, Yong Woo Choi, Akintunde I. Akinwande
  • Patent number: 8253895
    Abstract: A thin film transistor array substrate is provided with a gate line assembly, a data line assembly, and thin film transistors. The data line assembly crosses over the gate line assembly while defining pixel regions. A pixel electrode is formed at each pixel region. A color filter substrate is provided with a black matrix, and color filters of red, green and blue are formed at the black matrix at the pixel regions. An overcoat layer covers the color filters, and a common electrode is formed on the overcoat layer with an opening pattern. The thin film transistor array substrate, and the color filter substrates face each other, and a liquid crystal material is injected between the thin film transistor array substrate, and the color filter substrate. The blue color filter has a thickness smaller than the red color filter or the green color filter such that the liquid crystal cell gap at the blue color filter is larger than the liquid crystal cell gap at the red or green color filter.
    Type: Grant
    Filed: July 31, 2009
    Date of Patent: August 28, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jang-Kun Song, Kyeong-Hyeon Kim, Jae-Jin Lyu, Seung-Hee Lee, Seung-Beom Park, Yong-Woo Choi
  • Patent number: 8232182
    Abstract: A transfer layer includes a transparent substrate. A buffer layer is formed on the transparent substrate that comprises PbO, GaN, PbTiO3, La0.5Sr0.5CoO3 (LSCO), or LaxPb1-xCoO3 (LPCO) so that separation between the buffer layer and the transparent substrate occurs at substantially high temperatures.
    Type: Grant
    Filed: September 7, 2005
    Date of Patent: July 31, 2012
    Assignee: Massachusetts Institute of Technology
    Inventors: Il-Doo Kim, Harry L. Tuller, Yong Woo Choi, Akintunde I. Akinwande
  • Publication number: 20120100661
    Abstract: Discussed are an ink containing nanoparticles for formation of thin film of a solar cell and its preparation method, CIGS thin film solar cell having at least one light absorption layer formed by coating or printing the above ink containing nanoparticles on a rear electrode, and a process for manufacturing the same. More particularly, the above absorption layer includes Cu, In, Ga and Se elements as constitutional ingredients thereof and such elements exist in the light absorption layer by coating or printing an ink that contains Cu2Se nanoparticles and (In,Ga)2Se3 nanoparticles on the rear electrode, and heating the treated electrode with the ink. Since Cu(In,Ga)Se2 (CIGS) thin film is formed using the ink containing nanoparticles, a simple process is used without requirement of vacuum processing or complex equipment and particle size of the thin film, Ga doping concentration, etc., can be easily regulated.
    Type: Application
    Filed: December 27, 2011
    Publication date: April 26, 2012
    Inventors: Young-Ho Choe, Young-Hee Lee, Yong-Woo Choi, Hyung-Seok Kim, Ho-Gyoung Kim
  • Publication number: 20110285952
    Abstract: A liquid crystal display includes first and second substrates. The first substrate has a first insulating substrate, and a pixel electrode formed on the first insulating substrate with a first opening pattern. The second substrate has a second insulating substrate, and a common electrode formed on the second insulating substrate with a second opening pattern. The first and the second opening patterns proceed parallel to each other while being arranged in an alternate manner. A liquid crystal material is injected between the first and the second substrates. A spacer is positioned at an end of the second opening pattern to maintain the distance between the first and the second substrates.
    Type: Application
    Filed: August 2, 2011
    Publication date: November 24, 2011
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Joong-Hyun MUN, Jang-Kun SONG, Yong-Woo CHOI, Bo-Sung KIM, Kwan-Wook JUNG, Jung-Ho LEE, Hyo-Rak NAM
  • Patent number: 8009257
    Abstract: A liquid crystal display includes first and second substrates. The first substrate has a first insulating substrate, and a pixel electrode formed on the first insulating substrate with a first opening pattern. The second substrate has a second insulating substrate, and a common electrode formed on the second insulating substrate with a second opening pattern. The first and the second opening patterns proceed parallel to each other while being arranged in an alternate manner. A liquid crystal material is injected between the first and the second substrates. A spacer is positioned at an end of the second opening pattern to maintain the distance between the first and the second substrates.
    Type: Grant
    Filed: October 26, 2010
    Date of Patent: August 30, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Joong-Hyun Mun, Jang-Kun Song, Yong-Woo Choi, Bo-Sung Kim, Kwan-Wook Jung, Jung-Ho Lee, Hyo-Rak Nam
  • Publication number: 20110037933
    Abstract: A liquid crystal display includes first and second substrates. The first substrate has a first insulating substrate, and a pixel electrode formed on the first insulating substrate with a first opening pattern. The second substrate has a second insulating substrate, and a common electrode formed on the second insulating substrate with a second opening pattern. The first and the second opening patterns proceed parallel to each other while being arranged in an alternate manner. A liquid crystal material is injected between the first and the second substrates. A spacer is positioned at an end of the second opening pattern to maintain the distance between the first and the second substrates.
    Type: Application
    Filed: October 26, 2010
    Publication date: February 17, 2011
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Joong-Hyun Mun, Jang-Kun Song, Yong-Woo Choi, Bo-Sung Kim, Kwan-Wook Jung, Jung-Ho Lee, Hyo-Rak Nam
  • Patent number: 7868862
    Abstract: A liquid crystal display is provided. The liquid crystal display includes a plurality of first pixels provided with RGB color filters and a plurality of second pixels provided with CMY color filters are formed at a liquid crystal display panel. A video processing part is inputted with RGB data to generate CMY data, and selectively outputs RGB data inputted in accordance with a clock signal and CMY data generated in accordance with a clock signal. A control part controls a supply of RGB data or CMY data inputted from the video processing part in accordance with the clock signal. In accordance with a control part, a data driving part converts RGB data or CMY data outputted from the control part into an analog data, and then supplies it to the plurality of first pixel or the plurality of second pixel.
    Type: Grant
    Filed: December 2, 2006
    Date of Patent: January 11, 2011
    Assignee: LG Display Co., Ltd.
    Inventors: Dong Hoon Lee, Sun Hwa Lee, Yong Woo Choi
  • Publication number: 20100319776
    Abstract: Disclosed are an ink containing nanoparticles for formation of thin film of a solar cell and its preparation method, CIGS thin film solar cell having at least one light absorption layer formed by coating or printing the above ink containing nanoparticles on a rear electrode, and a process for manufacturing the same. More particularly, the above absorption layer comprises Cu, In, Ga and Se elements as constitutional ingredients thereof and such elements exist in the light absorption layer by coating or printing an ink that contains Cu2Se nanoparticles and (In,Ga)2Se3 nanoparticles on the rear electrode, and heating the treated electrode with the ink. According to the present invention, since Cu(In,Ga)Se2, that is, CIGS, thin film is formed using the ink containing nanoparticles, a simple process is preferably used without requirement of vacuum processing or complex equipment and particle size of the thin film, Ga doping concentration, etc. can be easily regulated.
    Type: Application
    Filed: April 11, 2008
    Publication date: December 23, 2010
    Applicant: LG ELECTRONICS INC.
    Inventors: Young-Ho Choe, Young-Hee Lee, Yong-Woo Choi, Hyung-Seok Kim, Ho-Gyoung Kim
  • Patent number: 7847772
    Abstract: A method of fabricating a flat panel display includes, judging a panel defect area and a non-defect area of a display panel, generating a first compensation data for compensating the panel defect area, first modulating a data of the panel defect area by using the first compensation data, judging a brightness at a border between the panel defect area and the non-defect area of the display panel after compensating the panel defect, generating a second compensation data for compensating the border and the panel defect area, second modulating a data of the border and the panel defect area by using the second compensation data, adding the first compensation data and the second compensation data to calculate a resultant compensation data, and storing the resultant compensation data at a data modulation memory.
    Type: Grant
    Filed: June 29, 2006
    Date of Patent: December 7, 2010
    Assignee: LG Display, Co., Ltd.
    Inventors: Yong Woo Choi, Jong Hee Hwang
  • Patent number: 7843542
    Abstract: A liquid crystal display includes first and second substrates. The first substrate has a first insulating substrate, and a pixel electrode formed on the first insulating substrate with a first opening pattern. The second substrate has a second insulating substrate, and a common electrode formed on the second insulating substrate with a second opening pattern. The first and the second opening patterns proceed parallel to each other while being arranged in an alternate manner. A liquid crystal material is injected between the first and the second substrates. A spacer is positioned at an end of the second opening pattern to maintain the distance between the first and the second substrates.
    Type: Grant
    Filed: June 23, 2008
    Date of Patent: November 30, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Joong-Hyun Mun, Jang-Kun Song, Yong-Woo Choi, Bo-Sung Kim, Kwan-Wook Jung, Jung-Ho Lee, Hyo-Rak Nam
  • Patent number: 7830492
    Abstract: A liquid crystal display includes first and second substrates. The first substrate has a first insulating substrate, and a pixel electrode formed on the first insulating substrate with a first opening pattern. The second substrate has a second insulating substrate, and a common electrode formed on the second insulating substrate with a second opening pattern. The first and the second opening patterns proceed parallel to each other while being arranged in an alternate manner. A liquid crystal material is injected between the first and the second substrates. A spacer is positioned at an end of the second opening pattern to maintain the distance between the first and the second substrates.
    Type: Grant
    Filed: November 12, 2009
    Date of Patent: November 9, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Joong-Hyun Mun, Jang-Kun Song, Yong-Woo Choi, Bo-Sung Kim, Kwan-Wook Jung, Jung-Ho Lee, Hyo-Rak Nam
  • Publication number: 20100053485
    Abstract: A liquid crystal display includes first and second substrates. The first substrate has a first insulating substrate, and a pixel electrode formed on the first insulating substrate with a first opening pattern. The second substrate has a second insulating substrate, and a common electrode formed on the second insulating substrate with a second opening pattern. The first and the second opening patterns proceed parallel to each other while being arranged in an alternate manner. A liquid crystal material is injected between the first and the second substrates. A spacer is positioned at an end of the second opening pattern to maintain the distance between the first and the second substrates.
    Type: Application
    Filed: November 12, 2009
    Publication date: March 4, 2010
    Inventors: Joong-Hyun Mun, Jang-Kun Song, Yong-Woo Choi, Bo-Sung Kim, Kwan-Wook Jung, Jung-Ho Lee, Hyo-Rak Nam
  • Patent number: 7639337
    Abstract: A liquid crystal display includes first and second substrates. The first substrate has a first insulating substrate, and a pixel electrode formed on the first insulating substrate with a first opening pattern. The second substrate has a second insulating substrate, and a common electrode formed on the second insulating substrate with a second opening pattern. The first and the second opening patterns proceed parallel to each other while being arranged in an alternate manner. A liquid crystal material is injected between the first and the second substrates. A spacer is positioned at an end of the second opening pattern to maintain the distance between the first and the second substrates.
    Type: Grant
    Filed: January 12, 2009
    Date of Patent: December 29, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Joong-Hyun Mun, Jang-Kun Song, Yong-Woo Choi, Bo-Sung Kim, Kwan-Wook Jung, Jung-Ho Lee, Hyo-Rak Nam
  • Publication number: 20090290106
    Abstract: A thin film transistor array substrate is provided with a gate line assembly, a data line assembly, and thin film transistors. The data line assembly crosses over the gate line assembly while defining pixel regions. A pixel electrode is formed at each pixel region. A color filter substrate is provided with a black matrix, and color filters of red, green and blue are formed at the black matrix at the pixel regions. An overcoat layer covers the color filters, and a common electrode is formed on the overcoat layer with an opening pattern. The thin film transistor array substrate, and the color filter substrates face each other, and a liquid crystal material is injected between the thin film transistor array substrate, and the color filter substrate. The blue color filter has a thickness smaller than the red color filter or the green color filter such that the liquid crystal cell gap at the blue color filter is larger than the liquid crystal cell gap at the red or green color filter.
    Type: Application
    Filed: July 31, 2009
    Publication date: November 26, 2009
    Inventors: Jang-Kun Song, Kyeong-Hyeon Kim, Jae-Jin Lyu, Seung-Hee Lee, Seung-Beom Park, Yong-Woo Choi
  • Patent number: 7605886
    Abstract: A thin film transistor array substrate is provided with a gate line assembly, a data line assembly, and thin film transistors. The data line assembly crosses over the gate line assembly while defining pixel regions. A pixel electrode is formed at each pixel region. A color filter substrate is provided with a black matrix, and color filters of red, green and blue are formed at the black matrix at the pixel regions. An overcoat layer covers the color filters, and a common electrode is formed on the overcoat layer with an opening pattern. The thin film transistor array substrate, and the color filter substrates face each other, and a liquid crystal material is injected between the thin film transistor array substrate, and the color filter substrate. The blue color filter has a thickness smaller than the red color filter or the green color filter such that the liquid crystal cell gap at the blue color filter is larger than the liquid crystal cell gap at the red or green color filter.
    Type: Grant
    Filed: May 31, 2006
    Date of Patent: October 20, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jang-Kun Song, Kyeong-Hyeon Kim, Jae-Jin Lyu, Seung-Hee Lee, Seung-Beom Park, Yong-Woo Choi
  • Publication number: 20090128725
    Abstract: A liquid crystal display includes first and second substrates. The first substrate has a first insulating substrate, and a pixel electrode formed on the first insulating substrate with a first opening pattern. The second substrate has a second insulating substrate, and a common electrode formed on the second insulating substrate with a second opening pattern. The first and the second opening patterns proceed parallel to each other while being arranged in an alternate manner. A liquid crystal material is injected between the first and the second substrates. A spacer is positioned at an end of the second opening pattern to maintain the distance between the first and the second substrates.
    Type: Application
    Filed: January 12, 2009
    Publication date: May 21, 2009
    Inventors: Joong-Hyun Mun, Jang-Kun Song, Yong-Woo Choi, Bo-Sung Kim, Kwan-Wook Jung, Jung-Ho Lee, Hyo-Rak Nam