Patents by Inventor Han-Jin Ahn

Han-Jin Ahn 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).

  • Publication number: 20140368775
    Abstract: An alignment film for liquid crystal display device includes a first portion positioned towards to the liquid crystal layer and a second portion positioned away from the liquid crystal layer. The first portion provides improved anchoring force while the second portion exhibits a lower volume resistance than the first portion. Thus, AC image sticking and DC image sticking can be minimized at the same time.
    Type: Application
    Filed: June 17, 2014
    Publication date: December 18, 2014
    Inventors: SeungRyull Park, HyunJin Park, JinPil Kim, Han Jin Ahn, Hanseok Lee, Su-Bin Lee
  • Publication number: 20140368779
    Abstract: Provided is a method of manufacturing new liquid crystal display device according to an embodiment of the present invention. Firstly, an alignment film is formed on a substrate. The alignment film is divided into a first alignment film formed using, as a precursor, liquid-state polyimide that contains a photodecomposition substance and a second alignment film formed using, as a precursor, a polyamic acid that does not contain a photodecomposition substance. UV light is irradiated to the alignment film, and decomposed substances formed by irradiation of the UV light is removed by an at least two-step removing process. By the method of manufacturing a liquid crystal display device according to the exemplary embodiment of the present disclosure, bright spots are minimized in pixels and a brightness of black is lowered, so that a liquid crystal display device with a high contrast ratio can be realized.
    Type: Application
    Filed: June 17, 2014
    Publication date: December 18, 2014
    Inventors: SeungRyull Park, HyunJin Park, JinPil Kim, Han Jin Ahn, Hanseok Lee, Su-Bin Lee
  • Patent number: 8395739
    Abstract: An in-plane-switching mode liquid crystal display device is disclosed. The LCD device includes: first and second substrates opposite to each other; a liquid crystal layer interposed between the first and second substrates; a passivation film formed on the first substrate in which a thin film transistor is disposed; pixel and common electrodes arranged alternately with each other; and a first alignment film formed on the pixel and common electrodes. The liquid crystal layer and the passivation film are formed to have lower non-resistances than that of the first alignment film.
    Type: Grant
    Filed: December 16, 2009
    Date of Patent: March 12, 2013
    Assignee: LG Display Co., Ltd.
    Inventors: Han Shin Hwang, Joung Won Woo, Dong Guk Kim, Woo Keun Lee, Han Jin Ahn
  • Publication number: 20110147743
    Abstract: The present invention relates to a thin film transistor substrate and a method for fabricating the same, which can shorten a process time, prevent a scratch from taking place at an alignment film, and increase black luminance. The thin film transistor substrate includes a thin film transistor formed on a substrate, a protective film formed to flatten a step of the thin film transistor and have an uneven surface with repetitive projected patterns and recessed patterns, a pixel electrode formed on the protective film to maintain an uneven shape of the protective film, and an alignment film formed both on the protective film and the pixel electrode to maintain the uneven shapes of the protective film and the pixel electrode.
    Type: Application
    Filed: December 15, 2010
    Publication date: June 23, 2011
    Inventors: Han-Jin Ahn, Su-Hyun Park
  • Publication number: 20110051066
    Abstract: Disclosed are an apparatus and method for fabricating an alignment layer for liquid crystal displays, capable of shortening process time, preventing scratches of alignment layers and decreasing black luminance. The method includes coating an alignment agent on a substrate, arranging a nano pattern mold with a groove and a protrusion to contact the alignment agent, pre-curing the alignment agent, separating the nano pattern mold from the alignment agent, and hard-curing the alignment agent separated from the nano pattern mold to form an alignment layer.
    Type: Application
    Filed: December 18, 2009
    Publication date: March 3, 2011
    Inventors: Han-Jin Ahn, Han-Shin Hwang
  • Patent number: 7755733
    Abstract: A liquid crystal display apparatus includes a first display substrate, a second display substrate and a liquid crystal layer disposed therebetween. The first and second display substrates include first and second vertical inorganic alignment layers, respectively, to vertically align liquid crystal molecules of the liquid crystal layer. The first and second vertical inorganic alignment layers each include a silicon carbide and are formed on the first and second display substrates, respectively, by a chemical vapor deposition method or a sputtering method. Thus, processes for the vertical inorganic alignment layer may be simplified, thereby improving manufacturing productivity of the liquid crystal display apparatus.
    Type: Grant
    Filed: June 14, 2006
    Date of Patent: July 13, 2010
    Assignees: Samsung Electronics Co., Ltd., Industry-Academic Cooperation Foundation, Yonsai University
    Inventors: Soon-Joon Rho, Hong-Koo Baik, Kyung-Chan Kim, Jong-Bok Kim, Byoung-Har Hwang, Han-Jin Ahn
  • Publication number: 20100165277
    Abstract: An in-plane-switching mode liquid crystal display device is disclosed. The LCD device includes: first and second substrates opposite to each other; a liquid crystal layer interposed between the first and second substrates; a passivation film formed on the first substrate in which a thin film transistor is disposed; pixel and common electrodes arranged alternately with each other; and a first alignment film formed on the pixel and common electrodes. The liquid crystal layer and the passivation film are formed to have lower non-resistances than that of the first alignment film.
    Type: Application
    Filed: December 16, 2009
    Publication date: July 1, 2010
    Inventors: Han Shin HWANG, Joung Won Woo, Dong Guk Kim, Woo Keun Lee, Han Jin Ahn
  • Publication number: 20070279562
    Abstract: An alignment layer for an LCD includes a thin layer of silicon oxide SiOx. The silicon oxide layer horizontally aligns liquid crystals thereon when the value of x is in the range from about 1.0 to about 1.5, but vertically aligns the liquid crystals when the value of x is in a range from about 1.5 to about 2.0. The alignment layer is readily formed on a large area of the substrate through chemical vapor deposition or evaporation deposition. Because the alignment layer is thermally and physically stable, the operational characteristics of the liquid crystal display employing this alignment layer are improved. In addition, the alignment layer has a thickness of about 500 to about 3000 angstroms thereby improving light transmittance of the LCD having the alignment layer.
    Type: Application
    Filed: April 12, 2007
    Publication date: December 6, 2007
    Inventors: Soon-Joon Rho, Baek-Kyun Jeon, Kyoong-Ok Park, Hee-Keun Lee, Hong-Koo Baik, Kyung-Chan Kim, Jong-Bok Kim, Byoung-Har Hwang, Dong-Choon Hyun, Han-Jin Ahn
  • Publication number: 20070110920
    Abstract: A liquid crystal display apparatus includes a first display substrate, a second display substrate and a liquid crystal layer disposed therebetween. The first and second display substrates include first and second vertical inorganic alignment layers, respectively, to vertically align liquid crystal molecules of the liquid crystal layer. The first and second vertical inorganic alignment layers each include a silicon carbide and are formed on the first and second display substrates, respectively, by a chemical vapor deposition method or a sputtering method. Thus, processes for the vertical inorganic alignment layer may be simplified, thereby improving manufacturing productivity of the liquid crystal display apparatus.
    Type: Application
    Filed: June 14, 2006
    Publication date: May 17, 2007
    Inventors: Soon-Joon Rho, Hong-Koo Baik, Kyung-Chan Kim, Jong-Bok Kim, Byoung-Har Hwang, Han-Jin Ahn