Patents by Inventor Hee-Jean Lee

Hee-Jean 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: 8545717
    Abstract: The present invention relates to a composition comprising a curable dichroic dye and a curable liquid crystal compound, which are used to prepare an optical component that is vertically oriented to give a narrow viewing angle, to form an optical component, and an optical component comprising an optical component layer prepared using the same. There is provided a composition for forming an optical component comprising 0.1-90 parts by weight of a dichroic dye and 10-98.85 parts by weight of a curable liquid crystal compound, and there is also provided an optical component comprising an optical component layer in which a curable liquid crystal compound and a curable dichroic dye are vertically oriented.
    Type: Grant
    Filed: July 4, 2008
    Date of Patent: October 1, 2013
    Assignee: LG Chem, Ltd.
    Inventors: Yong Il Cho, Dae Hee Lee, Sin Young Kim, Hee Jean Lee, Su Young Ryu
  • Patent number: 8207283
    Abstract: Disclosed is a method for producing a norbornene monomer composition, a norbornene polymer produced using the norbornene monomer composition, an optical film including the norbornene polymer, and a method for producing the norbornene polymer. The method includes reacting a reaction solution that contains cyclopentadiene, dicyclopentadiene, or a mixture of cyclopentadiene and dicyclopentadiene, an acetate compound, and a solvent so that a content of an exo isomer is 50 mol % or more. Variables such as a reaction temperature, a reaction time, a molar ratio between reactants, and addition of a solvent are controlled so that the exo isomer is contained in content of 50 mol % or more. Accordingly, it is possible to industrially produce an acetate norbornene addition polymer by using the acetate norbornene monomer composition containing the exo isomer in content of 50 mol % or more.
    Type: Grant
    Filed: April 6, 2011
    Date of Patent: June 26, 2012
    Assignee: LG Chem, Ltd.
    Inventors: Dai-Seung Choi, Hye-Young Jung, Sung-Don Hong, Jung-Min Lee, Hee-Jean Lee, Sung-Ho Chun
  • Patent number: 8207279
    Abstract: Disclosed is a method for producing a norbornene monomer composition, a norbornene polymer produced using the norbornene monomer composition, an optical film including the norbornene polymer, and a method for producing the norbornene polymer. The method includes reacting a reaction solution that contains cyclopentadiene, dicyclopentadiene, or a mixture of cyclopentadiene and dicyclopentadiene, an acetate compound, and a solvent so that a content of an exo isomer is 50 mol % or more. Variables such as a reaction temperature, a reaction time, a molar ratio between reactants, and addition of a solvent are controlled so that the exo isomer is contained in content of 50 mol % or more. Accordingly, it is possible to industrially produce an acetate norbornene addition polymer by using the acetate norbornene monomer composition containing the exo isomer in content of 50 mol % or more.
    Type: Grant
    Filed: June 26, 2007
    Date of Patent: June 26, 2012
    Assignee: LG Chem, Ltd.
    Inventors: Dai-Seung Choi, Hye-Young Jung, Sung-Don Hong, Jung-Min Lee, Hee-Jean Lee, Sung-Ho Chun
  • Publication number: 20110245443
    Abstract: Disclosed is a method for producing a norbornene monomer composition, a norbornene polymer produced using the norbornene monomer composition, an optical film including the norbornene polymer, and a method for producing the norbornene polymer. The method includes reacting a reaction solution that contains cyclopentadiene, dicyclopentadiene, or a mixture of cyclopentadiene and dicyclopentadiene, an acetate compound, and a solvent so that a content of an exo isomer is 50 mol % or more. Variables such as a reaction temperature, a reaction time, a molar ratio between reactants, and addition of a solvent are controlled so that the exo isomer is contained in content of 50 mol % or more. Accordingly, it is possible to industrially produce an acetate norbornene addition polymer by using the acetate norbornene monomer composition containing the exo isomer in content of 50 mol % or more.
    Type: Application
    Filed: April 6, 2011
    Publication date: October 6, 2011
    Inventors: Dai-Seung CHOI, Hye-Young Jung, Sung-Don Hong, Jung-Min Lee, Hee-Jean Lee, Sung-Ho Chun
  • Publication number: 20100068419
    Abstract: There is provided a retardation film capable of adjusting an angle between a proceeding direction of a film and an optical axis of liquid crystal by employing an alignment layer formed of polymers including norbornene and improving thermal stability and photoreaction rate, a method for preparing the retardation film and a polarizer comprising the retardation film.
    Type: Application
    Filed: April 23, 2008
    Publication date: March 18, 2010
    Inventors: Sin Young Kim, Eun Kyung Kim, Moon Soo Park, Yong Il Cho, Sung Ho Chun, Hee Jean Lee, Heon Kim
  • Publication number: 20100055353
    Abstract: The present invention relates to a composition comprising a curable dichroic dye and a curable liquid crystal compound, which are used to prepare an optical component that is vertically oriented to give a narrow viewing angle, to form an optical component, and an optical component comprising an optical component layer prepared using the same. There is provided a composition for forming an optical component comprising 0.1-90 parts by weight of a dichroic dye and 10-98.85 parts by weight of a curable liquid crystal compound, and there is also provided an optical component comprising an optical component layer in which a curable liquid crystal compound and a curable dichroic dye are vertically oriented.
    Type: Application
    Filed: July 4, 2008
    Publication date: March 4, 2010
    Applicant: LG CHEM, LTD.
    Inventors: Yong Il Cho, Dae Hee Lee, Sin Young Kim, Hee Jean Lee, Su Young Ryu
  • Publication number: 20100010177
    Abstract: Disclosed is a method for producing a norbornene monomer composition, a norbornene polymer produced using the norbornene monomer composition, an optical film including the norbornene polymer, and a method for producing the norbornene polymer. The method includes reacting a reaction solution that contains cyclopentadiene, dicyclopentadiene, or a mixture of cyclopentadiene and dicyclopentadiene, an acetate compound, and a solvent so that a content of an exo isomer is 50 mol % or more. Variables such as a reaction temperature, a reaction time, a molar ratio between reactants, and addition of a solvent are controlled so that the exo isomer is contained in content of 50 mol % or more. Accordingly, it is possible to industrially produce an acetate norbornene addition polymer by using the acetate norbornene monomer composition containing the exo isomer in content of 50 mol % or more.
    Type: Application
    Filed: June 26, 2007
    Publication date: January 14, 2010
    Applicant: LG CHEM, LTD.
    Inventors: Dai-Seung Choi, Hye-Young Jung, Sung-Don Hong, Jung-Min Lee, Hee-Jean Lee, Sung-Ho Chun