Patents by Inventor Chang Hun Han

Chang Hun Han 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).

  • Optical film and method of preparing same
    Patent number: 8951643
    Abstract: The present invention relates to an optical film and method of manufacturing the same. The optical film of the present invention includes an acrylic resin and a core-shell type graft copolymer wherein the core includes a conjugate diene rubber, and the shell includes an acrylic monomer, an aromatic vinyl monomer, and a maleimide monomer.
    Type: Grant
    Filed: October 1, 2009
    Date of Patent: February 10, 2015
    Assignee: LG Chem, Ltd.
    Inventors: Byoung-Il Kang, Chang-Hun Han, Jung-A Yoo, Song-Taek Oh
  • Acrylic resin composition, and optical film comprising same
    Patent number: 8926872
    Abstract: The present invention relates to an acrylic copolymer resin containing: 1) an alkyl (meth)acrylate-based monomer; 2) a (meth)acrylate-based monomer containing an aliphatic ring and/or an aromatic ring; and 3) at least an imide-based monomer or a styrene-based monomer, to a resin composition containing said acrylic copolymer resin and a resin containing an aromatic ring and/or an aliphatic ring in the main chain thereof, to an optical film comprising said resin composition, and to a liquid crystal display device comprising said optical film. The optical film according to the present invention has excellent heat resistance, optical transparency, etc.
    Type: Grant
    Filed: September 20, 2013
    Date of Patent: January 6, 2015
    Assignee: LG Chem, Ltd.
    Inventors: Su-Kyung Kim, Byoung-Il Kang, Dae-Woo Lee, Byoung-Kue Chun, Chang-Hun Han, Da-Eun Sung
  • Resin composition and optical film formed by using the same
    Patent number: 8928976
    Abstract: Provided are a resin composition and an optical film formed by using the same, and more particularly, a resin composition including 85 to 95 parts by weight of a matrix copolymer resin including an alkyl(meth)acrylate-based unit, an acryl-based unit containing a benzene ring, and a (meth)acrylic acid unit, and 5 to 15 parts by weight of a polymer resin having a molecular weight range of 150,000 to 1,000,000 and an optical film formed by using the composition. A resin composition according to the present invention may provide a protective film for a polarizing plate having excellent heat resistance and toughness as well as excellent optical properties, and thus, an optical film formed by using the resin composition of the present invention may be used in information electronic devices such as display devices for various applications.
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: January 6, 2015
    Assignee: LG Chem, Ltd.
    Inventors: Byoung-Il Kang, Chang-Hun Han, Dae-Woo Lee, Jae-Bum Seo, Jung-Tae Park, Eun-Jung Choi, Joon-Sik Kim, Beom-Suk Kim, Nam-Jeong Lee, Sang-Min Kwak, Jun-Geun Um, Suk-Il Youn, Joong-Hoon Lee
  • Optical film and a production method therefor
    Patent number: 8911854
    Abstract: The present invention provides an optical film and s retardation film characterized in that each of them includes: an acrylic resin; and 20-65 parts by weight of at least two graft copolymers containing a conjugated diene-based rubber, based on 100 parts by weight of the acrylic resin, wherein at least two of the graft copolymers have different particle sizes. The present invention also provides a production method therefore.
    Type: Grant
    Filed: June 3, 2009
    Date of Patent: December 16, 2014
    Assignee: LG Chem, Ltd.
    Inventors: Byoung-II Kang, Chang-Hun Han, Chan-Hong Lee, Dae-Woo Lee, Jae-Bum Seo, Sang-Seop Kim
  • OPTICAL FILM AND METHOD OF MANUFACTURING THE SAME
    Publication number: 20140239523
    Abstract: The present invention provides an optical film and a retardation film that each include an acryl resin, and 20 to 65 parts by weight of a graft copolymer including a conjugated diene rubber based on 100 parts by weight of the acryl resin, and an electronic device including the same.
    Type: Application
    Filed: May 2, 2014
    Publication date: August 28, 2014
    Applicant: LG CHEM, LTD.
    Inventors: Byoung-Il KANG, Chan-Hong LEE, Chang-Hun HAN
  • Acrylic copolymer with high heat resistance and high strength, and optical film comprising the same
    Patent number: 8765896
    Abstract: The present invention relates to an acrylic copolymer having high heat resistance and high strength, and an optical film comprising the same, and more particularly, to an acrylic copolymer for optical films in which alkyl (meth)acrylate monomers; (meth)acrylate monomers comprising aromatic rings and/or aliphatic rings; and (meth)acrylamide monomers are included and polymerized. An acrylic copolymer according to the present invention is excellent in heat resistance while maintaining transparency. Further, an optical film comprising a compound resin including the acrylic copolymer has superior transparency and heat resistance and is excellent in formability, adhesion, retardation properties, and durability.
    Type: Grant
    Filed: June 8, 2011
    Date of Patent: July 1, 2014
    Assignee: LG Chem, Ltd.
    Inventors: Su-Kyung Kim, Da-Eun Sung, Chang-Hun Han, Byung-Il Kang, Jae-Bum Seo, Eun-Jung Choi, Byoung-Kue Chun, Yu-Taek Sung
  • Optical film and method of manufacturing the same
    Patent number: 8758655
    Abstract: The present invention provides an optical film and a retardation film that each include an acryl resin, and 20 to 65 parts by weight of a graft copolymer including a conjugated diene rubber based on 100 parts by weight of the acryl resin, and an electronic device including the same.
    Type: Grant
    Filed: September 17, 2008
    Date of Patent: June 24, 2014
    Assignee: LG Chem, Ltd.
    Inventors: Byoung-Il Kang, Chan-Hong Lee, Chang-Hun Han
  • Photo Sensor
    Publication number: 20140124843
    Abstract: Disclosed is a photo sensor including a first conductive type semiconductor substrate, a photodiode region in a light receiving region of the semiconductor substrate, a first transistor including a first gate, a first source region and a first drain region, the first transistor being adjacent to the photodiode region, and a light-absorption control layer in a first region of the photodiode region, the light-absorption control layer exposing a second region of the photodiode region, wherein the first region is spaced apart from the first source region, and the second region is another portion of the photodiode region contacting the first source region.
    Type: Application
    Filed: February 8, 2013
    Publication date: May 8, 2014
    Inventor: Chang Hun HAN
  • ACRYLIC RESIN COMPOSITION, AND OPTICAL FILM COMPRISING SAME
    Publication number: 20140092473
    Abstract: The present invention relates to an acrylic copolymer resin containing: 1) an alkyl (meth)acrylate-based monomer; 2) a (meth)acrylate-based monomer containing an aliphatic ring and/or an aromatic ring; and 3) at least an imide-based monomer or a styrene-based monomer, to a resin composition containing said acrylic copolymer resin and a resin containing an aromatic ring and/or an aliphatic ring in the main chain thereof, to an optical film comprising said resin composition, and to a liquid crystal display device comprising said optical film. The optical film according to the present invention has excellent heat resistance, optical transparency, etc.
    Type: Application
    Filed: September 20, 2013
    Publication date: April 3, 2014
    Applicant: LG CHEM, LTD.
    Inventors: Su-Kyung Kim, Byoung-II Kang, Dae-Woo Lee, Byoung-Kue Chun, Chang-Hun Han, Da-Eun Sung
  • Variable capacitor and method for driving the same
    Patent number: 8659868
    Abstract: Disclosed herein is a variable capacitor and its driving method, the variable capacitor including, a movable first electrode; and a second electrode formed with an insulating film, fixed in place, and its insulating film contacting the first electrode that is moved.
    Type: Grant
    Filed: May 27, 2011
    Date of Patent: February 25, 2014
    Assignee: LG Innotek Co., Ltd.
    Inventors: Chang Wook Kim, Dong Chan Park, Ju Young Song, Sang Hun Lee, Sung Bae Cho, Hyun Ho Yang, Jun Bo Yoon, Dong Hun Choi, Chang Hun Han
  • RESIN COMPOSITION FOR OPTICAL FILM AND OPTICAL FILM USING THE SAME
    Publication number: 20140046016
    Abstract: The present invention relates to a resin composition for an optical film comprising a copolymer which includes an alkyl (meth)acrylate unit, a (meth)acrylate unit having a benzene ring, and a (meth)acrylic acid unit, wherein a content of a residual monomer is less than 2000 ppm in the resin composition and an optical film using the same.
    Type: Application
    Filed: June 1, 2012
    Publication date: February 13, 2014
    Applicant: LG CHEM, LTD.
    Inventors: Byoung-II Kang, Chang-Hun Han, Dae-Woo Lee, Jae-Bum Seo, Beom-Seok Kim, Eun-Jung Choi, Joon-Sik Kim, Nam-Jeong Lee, Su-Kyung Kim, Da-Eun Sung
  • RESIN COMPOSITION FOR OPTICAL FILM AND OPTICAL FILM USING THE SAME
    Publication number: 20140036363
    Abstract: Provided are a resin composition for an optical film including an alkyl(meth)acrylate unit, a benzyl(meth)acrylate unit, a (meth)acrylic acid unit, and a unit expressed by Chemical Formula I, an optical film, a polarizing plate, and an image display device using the resin composition.
    Type: Application
    Filed: January 30, 2012
    Publication date: February 6, 2014
    Applicant: LG CHEM, LTD.
    Inventors: Jae-Bum Seo, Chang-Hun Han, Dae-Woo Lee, Jung-Tae Park, Eun-Jung Choi, Byoung-II Kang, Joon-Sik Kim, Su-Kyung Kim, Da-Eun Sung, Nam-Jeong Lee, Beom-Suk Kim, Yu-Taek Sung
  • ALKYL(METH)ACRYLATE-BASED THERMOPLASTIC RESIN COMPOSITION AND THERMOPLASTIC RESIN WITH HIGH SCRATCH RESISTANCE AND LOW YELLOWNESS
    Publication number: 20140039104
    Abstract: Disclosed are an alkyl(meth)acrylate-based thermoplastic resin composition and a thermoplastic resin with modified scratch resistance and yellowness. The alkyl(meth)acrylate-based thermoplastic resin composition provides improved scratch resistance and low yellowness index while maintaining transparency, flowability, and impact strength, even when the total content of the vinyl cyan-based monomer contained in the resin composition is reduced to a level unattainable by conventional techniques, and the content of the alkyl(meth)acrylate-based monomer is increased.
    Type: Application
    Filed: July 27, 2012
    Publication date: February 6, 2014
    Applicant: LG CHEM, LTD.
    Inventors: Hyun Seok Yang, Dae Woo Lee, Han Jong You, Chang Hun Han, Seong Lyong Kim
  • METHOD FOR PREPARING ACRYLIC COPOLYMER RESIN FOR OPTICAL FILM AND METHOD FOR FABRICATING OPTICAL FILM USING THE SAME
    Publication number: 20140015152
    Abstract: There is provided a method for preparing an acrylic copolymer resin for an optical film includes: suspension-polymerizing an acrylic monomer containing a benzene ring, an alkyl(meth)acrylate monomer, and a (meth)acrylic acid monomer to prepare a copolymer; and thermally treating the copolymer at a temperature ranging from 240° C. to 300° C. As the method for preparing an acrylic copolymer of the present invention, a resin having an effectively lowered CTE can be manufactured by inducing the formation of a glutaric anhydride structure by using suspension polymerization that facilitates adjustment of the molecular weight of a resin.
    Type: Application
    Filed: February 2, 2012
    Publication date: January 16, 2014
    Applicant: LG Chem, Ltd
    Inventors: Eun Jung Choi, Chang- Hun Han, Jae-Bum Seo, Beom-Seok Kim, Byouung-Il Kang, Nam-Jeong Lee, Su-Kyung Kim, Jun-Geun Um, Da-Eun Sung, Joong-Hoon Lee
  • Resin composition for optical film, and polarizer protective film and liquid crystal display including the same
    Patent number: 8623960
    Abstract: Provided are a resin composition including an acryl-based copolymer resin including an alkyl(meth)acrylate-based monomer and an imide-based monomer, additionally copolymerizable with a styrene-based monomer, and a polycarbonate-based resin having a melt index (MI) of 30 g/10 min or more under conditions of a load of 1.2 kg and a temperature of 300° C., a polarizer protective film including the resin composition, and a liquid crystal display including the polarizer protective film. The polarizer protective film according to the present invention has excellent heat resistance, transparency, and optical properties.
    Type: Grant
    Filed: January 20, 2012
    Date of Patent: January 7, 2014
    Assignee: LG Chem, Ltd.
    Inventors: Eun-Jung Choi, Byoung-Il Kang, Chang-Hun Han, Jae-Bum Seo
  • METHOD OF PREPARING RESIN COMPOSITION FOR OPTICAL FILM BY USING CONTINUOUS BULK POLYMERIZATION AND METHODS OF PREPARING OPTICAL FILM AND POLARIZING PLATE USING THE RESIN COMPOSITION
    Publication number: 20140000801
    Abstract: Provided is a method of preparing a resin composition for an optical film. The method includes forming a four-component copolymer by reacting an alkyl(meth)acrylate-based monomer, an acrylate-based monomer containing a benzene ring, and a (meth)acrylic acid monomer by using a continuous bulk polymerization method; and forming a resin composition for an optical film by removing unreacted monomer and solvent from a reaction product in a devolatilizer.
    Type: Application
    Filed: April 5, 2012
    Publication date: January 2, 2014
    Inventors: Jae-Bum Seo, Chang-Hun Han, Dae-Woo Lee, Jung-Tae Park, Eun-Jung Choi, Byoung-II Kang, Joon-Sik Kim, Nam-Jeong Lee, Sang-Min Kwak, Joong-Hoon Lee
  • RESIN COMPOSITION AND OPTICAL FILM FORMED BY USING THE SAME
    Publication number: 20130314785
    Abstract: Provided are a resin composition and an optical film formed by using the same, and more particularly, a resin composition including 85 to 95 parts by weight of a matrix copolymer resin including an alkyl(meth)acrylate-based unit, an acryl-based unit containing a benzene ring, and a (meth)acrylic acid unit, and 5 to 15 parts by weight of a polymer resin having a molecular weight range of 150,000 to 1,000,000 and an optical film formed by using the composition. A resin composition according to the present invention may provide a protective film for a polarizing plate having excellent heat resistance and toughness as well as excellent optical properties, and thus, an optical film formed by using the resin composition of the present invention may be used in information electronic devices such as display devices for various applications.
    Type: Application
    Filed: July 30, 2013
    Publication date: November 28, 2013
    Applicant: LG Chem, Ltd.
    Inventors: Byoung-Il KANG, Chang-Hun HAN, Dae-Woo LEE, Jae-Bum SEO, Jung-Tae PARK, Eun-Jung CHOI, Joon-Sik KIM, Beom-Suk KIM, Nam-Jeong LEE, Sang-Min KWAK, Jun-Geun UM, Suk-Il YOUN, Joong-Hoon LEE
  • Acrylic resin composition, and optical film comprising same
    Patent number: 8568624
    Abstract: The present invention relates to an acrylic copolymer resin containing: 1) an alklyl (meth)acrylate-based monomer; 2) a (meth)acrylate-based monomer containing an aliphatic ring and/or an aromatic ring; and 3) at least an imide-based monomer or a styrene-based monomer, to a resin composition containing said acrylic copolymer resin and a resin containing an aromatic ring and/or an aliphatic ring in the main chain thereof, to an optical film comprising said resin composition, and to a liquid crystal display device comprising said optical film. The optical film according to the present invention has excellent heat resistance, optical transparency, etc.
    Type: Grant
    Filed: February 18, 2010
    Date of Patent: October 29, 2013
    Assignee: LG Chem, Ltd.
    Inventors: Su-Kyung Kim, Byoung-Il Kang, Dae-Woo Lee, Byoung-Kue Chun, Chang-Hun Han, Da-Eun Sung
  • Acryl-based copolymers and optical film including the same
    Patent number: 8536275
    Abstract: The present invention relates to acryl-based copolymers including an alkyl(meth)acrylate-based monomer; a (meth)acrylate-based monomer containing an aromatic ring; and a maleimide-based monomer, a resin composition including the same, and an optical film prepared by using the same.
    Type: Grant
    Filed: June 13, 2011
    Date of Patent: September 17, 2013
    Assignee: LG Chem, Ltd.
    Inventors: Byung-Il Kang, Chang-Hun Han, Dae-Woo Lee, Eun-Jung Choi
  • RESIN COMPOSITION FOR OPTICAL FILM, AND POLARIZER PROTECTIVE FILM AND LIQUID CRYSTAL DISPLAY INCLUDING THE SAME
    Publication number: 20130190451
    Abstract: Provided are a resin composition including an acryl-based copolymer resin including an alkyl(meth)acrylate-based monomer and an imide-based monomer, additionally copolymerizable with a styrene-based monomer, and a polycarbonate-based resin having a melt index (MI) of 30 g/10 min or more under conditions of a load of 1.2 kg and a temperature of 300° C., a polarizer protective film including the resin composition, and a liquid crystal display including the polarizer protective film. The polarizer protective film according to the present invention has excellent heat resistance, transparency, and optical properties.
    Type: Application
    Filed: January 20, 2012
    Publication date: July 25, 2013
    Inventors: Eun-Jung CHOI, Byoung-Il KANG, Chang-Hun HAN, Jae-Bum SEO