Patents by Inventor Chang-Hun Yun

Chang-Hun Yun 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: 20240113149
    Abstract: Disclosed are a backside illuminated image sensor and a method of manufacturing the same. More particularly, a backside illuminated image sensor and a method of manufacturing the backside illuminated image sensor include a plurality of sequential layers have different refractive indexes to extend a path of incident light passing through a lens, thereby increasing sensitivity.
    Type: Application
    Filed: March 27, 2023
    Publication date: April 4, 2024
    Inventors: Chang Hun HAN, Ju Hwan JUNG, Sang Won YUN, Tae Wook KANG
  • Patent number: 11940932
    Abstract: Provided is an operating method of a storage device. The method includes providing temperature information of each of a plurality of volatile memory devices in the storage device to a host device; and receiving a setting command related to a refresh operation of the plurality of volatile memory devices from the host device, wherein the plurality of volatile memory devices are classified into groups based on temperature information, and wherein the setting command indicates a number of rows of the plurality of volatile memory devices to be refreshed differently for each of the groups based on the temperature information.
    Type: Grant
    Filed: June 28, 2021
    Date of Patent: March 26, 2024
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Doo Hwan Oh, Seung-Hun Lee, Jin Hun Jeong, Chang Ho Yun, Kyung-Hee Han
  • Patent number: 10676595
    Abstract: Disclosed are methods for combining a thermoplastic polymer with a carbon nanomaterial. More particularly, A method of preparing a thermoplastic polymer combined with a carbon nanomaterial includes combining the carbon nanomaterial with a pyrene derivative by stirring 1 to 40 wt % of a carbon nanomaterial, 1 to 40 wt % of a polycyclic aromatic hydrocarbon derivative, and 20 to 98 wt % of a solvent with a mechanical mixer. According to the present invention, the resulting materials exhibit excellent tensile strength, tensile modulus, electromagnetic shielding effects and anti-static effects, and the like.
    Type: Grant
    Filed: February 13, 2019
    Date of Patent: June 9, 2020
    Assignee: LG CHEM, LTD.
    Inventors: Yeon Sik Choi, Su Min Lee, Chang Hun Yun, Gi Dae Choi
  • Publication number: 20190177509
    Abstract: Disclosed are methods for combining a thermoplastic polymer with a carbon nanomaterial. More particularly, A method of preparing a thermoplastic polymer combined with a carbon nanomaterial includes combining the carbon nanomaterial with a pyrene derivative by stirring 1 to 40 wt % of a carbon nanomaterial, 1 to 40 wt % of a polycyclic aromatic hydrocarbon derivative, and 20 to 98 wt % of a solvent with a mechanical mixer. According to the present invention, the resulting materials exhibit excellent tensile strength, tensile modulus, electromagnetic shielding effects and anti-static effects, and the like.
    Type: Application
    Filed: February 13, 2019
    Publication date: June 13, 2019
    Inventors: Yeon Sik Choi, Su Min Lee, Chang Hun Yun, Gi Dae Choi
  • Patent number: 10266675
    Abstract: Disclosed are a thermoplastic polymer combined with a carbon nanomaterial and a method of preparing the same. More particularly, a thermoplastic polymer combined with carbon nanomaterial, comprising 0.1 to 15 wt % of a carbon nanomaterial, 0.025 to 30 wt % of a polycyclic aromatic hydrocarbon derivative, and 55 to 99.875 wt % of a thermoplastic polymer, wherein the carbon nanomaterial and the polycyclic aromatic hydrocarbon derivative combine through ?-? interaction, and the polycyclic aromatic hydrocarbon derivative covalently combines with the thermoplastic polymer, is disclosed. The thermoplastic polymer combined with the carbon nanomaterial and the method of preparing the same, according to the present invention, exhibit excellent tensile strength, tensile modulus, electromagnetic shielding effects and anti-static effects, and the like.
    Type: Grant
    Filed: August 28, 2014
    Date of Patent: April 23, 2019
    Assignee: LG CHEM, LTD.
    Inventors: Yeon Sik Choi, Su Min Lee, Chang Hun Yun, Gi Dae Choi
  • Patent number: 9932494
    Abstract: Disclosed are a resin composition and a molded product obtained using the same. By using the resin composition according to the present invention, a molded product having excellent tensile strength, tensile modulus, electromagnetic shielding effects, anti-static effects, and the like may be provided.
    Type: Grant
    Filed: August 28, 2014
    Date of Patent: April 3, 2018
    Assignee: LG CHEM, LTD.
    Inventors: Yeon Sik Choi, Su Min Lee, Chang Hun Yun, Gi Dae Choi
  • Patent number: 9840609
    Abstract: Provided is a thermoplastic resin composition for a radar cover which exhibits excellent mechanical properties as well as a good balance between electromagnetic reflection loss and electromagnetic penetration loss, which is required for a radar protection, by including 85 wt % to 95 wt % of a thermoplastic resin, 1 wt % to 5 wt % of carbon nanotubes, and 3 wt % to 10 wt % of carbon black, wherein a weight ratio of the carbon nanotubes to the carbon black is in a range of 3:7 to 1:7.
    Type: Grant
    Filed: December 5, 2014
    Date of Patent: December 12, 2017
    Assignee: LG CHEM, LTD.
    Inventors: Su Min Lee, Yeon Sik Choi, Gi Dae Choi, Chang Hun Yun
  • Publication number: 20160355670
    Abstract: Provided is a thermoplastic resin composition for a radar cover which exhibits excellent mechanical properties as well as a good balance between electromagnetic reflection loss and electromagnetic penetration loss, which is required for a radar protection, by including 85 wt % to 95 wt % of a thermoplastic resin, 1 wt % to 5 wt % of carbon nanotubes, and 3 wt % to 10 wt % of carbon black, wherein a weight ratio of the carbon nanotubes to the carbon black is in a range of 3:7 to 1:7.
    Type: Application
    Filed: December 5, 2014
    Publication date: December 8, 2016
    Inventors: Su Min LEE, Yeon Sik CHOI, Gi Dae CHOI, Chang Hun YUN
  • Publication number: 20160046794
    Abstract: Disclosed are a thermoplastic polymer combined with a carbon nanomaterial and a method of preparing the same. More particularly, a thermoplastic polymer combined with carbon nanomaterial, comprising 0.1 to 15 wt % of a carbon nanomaterial, 0.025 to 30 wt % of a polycyclic aromatic hydrocarbon derivative, and 55 to 99.875 wt % of a thermoplastic polymer, wherein the carbon nanomaterial and the polycyclic aromatic hydrocarbon derivative combine through ?-? interaction, and the polycyclic aromatic hydrocarbon derivative covalently combines with the thermoplastic polymer, is disclosed. The thermoplastic polymer combined with the carbon nanomaterial and the method of preparing the same, according to the present invention, exhibit excellent tensile strength, tensile modulus, electromagnetic shielding effects and anti-static effects, and the like.
    Type: Application
    Filed: August 28, 2014
    Publication date: February 18, 2016
    Inventors: Yeon Sik Choi, Su Min Lee, Chang Hun Yun, Gi Dae Choi
  • Publication number: 20160032144
    Abstract: Disclosed are a resin composition and a molded product obtained using the same. By using the resin composition according to the present invention, a molded product having excellent tensile strength, tensile modulus, electromagnetic shielding effects, anti-static effects, and the like may be provided.
    Type: Application
    Filed: August 28, 2014
    Publication date: February 4, 2016
    Inventors: Yeon Sik CHOI, Su Min LEE, Chang-Hun YUN, Gi Dae CHOI
  • Patent number: 8574689
    Abstract: There are provided an optical compensation film including an alignment film whose adhesiveness to a substrate and a liquid crystal layer and alignment property are excellent when a novel substrate is used to solve the problem regarding deteriorated durability being caused when a retardation film including a liquid crystal film is used under a hot and humid environment, and an integrated polarizing plate comprising the same. The O-plate includes a substrate; an alignment film prepared by coating the substrate with a composition for an alignment film that is composed of polyvinyl alcohol, a multifunctional acrylate monomer, a compatibilizing agent, a photo initiator and a solvent, followed by undergoing drying, curing and rubbing processes; and a splay-aligned liquid crystal film formed on the alignment film.
    Type: Grant
    Filed: November 15, 2007
    Date of Patent: November 5, 2013
    Assignee: LG Chem, Ltd.
    Inventors: Du-Hyun Shin, Chang-Hun Yun, Byoung-Kun Jeon, Moon-Soo Park
  • Patent number: 8355103
    Abstract: Disclosed herein are an integrated O film for improving a viewing angle of a TN-LCD, and a polarizer plate and TN-LCD including the same. Also disclosed herein are a compensation film which is capable of improving a contrast characteristic at a front side and an inclination angle and minimizing a color variation according to a viewing angle in a dark state, and a polarizer plate and TN-LCD including the same. The integrated O film includes a transversely-stretched negative biaxial (B) film and a positive O film laminated on the transversely-stretched negative B film.
    Type: Grant
    Filed: December 27, 2011
    Date of Patent: January 15, 2013
    Assignee: LG Chem, Ltd.
    Inventors: Byoung-Kun Jeon, Sergey Belyaev, Chang-Hun Yun, Moon-Soo Park
  • Patent number: 8236269
    Abstract: Disclosed are rigid random coils, having a contour length larger than a diameter thereof, an average bending ratio Db of 0.1˜0.8, and a weight average molecular weight of 1×108˜9×108 g/mole, and a resin composition or organic solvent composition including the same. The rigid random coils have the properties intermediate between those of polymers and rigid rod particles, and thus may be used as filler of various resins, aqueous solutions or organic solvents.
    Type: Grant
    Filed: February 13, 2007
    Date of Patent: August 7, 2012
    Assignee: LG Chem, Ltd.
    Inventors: Heon-Sang Lee, Chang-Hun Yun, Heon-Mo Kim
  • Publication number: 20120194765
    Abstract: Disclosed herein are an integrated O film for improving a viewing angle of a TN-LCD, and a polarizer plate and TN-LCD including the same. Also disclosed herein are a compensation film which is capable of improving a contrast characteristic at a front side and an inclination angle and minimizing a color variation according to a viewing angle in a dark state, and a polarizer plate and TN-LCD including the same. The integrated O film includes a transversely-stretched negative biaxial (B) film and a positive O film laminated on the transversely-stretched negative B film.
    Type: Application
    Filed: December 27, 2011
    Publication date: August 2, 2012
    Inventors: Byoung Kun JEON, Sergey Belyaev, Chang-Hun Yun, Moon-Soo Park
  • Patent number: 8107042
    Abstract: Disclosed herein are an integrated O film for improving a viewing angle of a TN-LCD, and a polarizer plate and TN-LCD including the same. Also disclosed herein are a compensation film which is capable of improving a contrast characteristic at a front side and an inclination angle and minimizing a color variation according to a viewing angle in a dark state, and a polarizer plate and TN-LCD including the same. The integrated O film includes a transversely-stretched negative biaxial (B) film and a positive O film laminated on the transversely-stretched negative B film.
    Type: Grant
    Filed: June 5, 2007
    Date of Patent: January 31, 2012
    Assignee: LG Chem, Ltd.
    Inventors: Byoung-Kun Jeon, Sergey Belyaev, Chang-Hun Yun, Moon-Soo Park
  • Publication number: 20090117293
    Abstract: There are provided an optical compensation film including an alignment film whose adhesiveness to a substrate and a liquid crystal layer and alignment property are excellent when a novel substrate is used to solve the problem regarding deteriorated durability being caused when a retardation film including a liquid crystal film is used under a hot and humid environment, and an integrated polarizing plate comprising the same. The O-plate includes a substrate; an alignment film prepared by coating the substrate with a composition for an alignment film that is composed of polyvinyl alcohol, a multifunctional acrylate monomer, a compatibilizing agent, a photo initiator and a solvent, followed by undergoing drying, curing and rubbing processes; and a splay-aligned liquid crystal film formed on the alignment film.
    Type: Application
    Filed: November 15, 2007
    Publication date: May 7, 2009
    Inventors: Du-Hyun Shin, Chang-Hun Yun, Byoung-Kun Jeon, Moon-Soo Park
  • Publication number: 20090096959
    Abstract: Disclosed herein are an integrated O film for improving a viewing angle of a TN-LCD, and a polarizer plate and TN-LCD including the same. Also disclosed herein are a compensation film which is capable of improving a contrast characteristic at a front side and an inclination angle and minimizing a color variation according to a viewing angle in a dark state, and a polarizer plate and TN-LCD including the same. The integrated O film includes a transversely-stretched negative biaxial (B) film and a positive O film laminated on the transversely-stretched negative B film.
    Type: Application
    Filed: June 5, 2007
    Publication date: April 16, 2009
    Inventors: Byoung-Kun Jeon, Sergey Belyaev, Chang-Hun Yun, Moon-Soo Park
  • Publication number: 20080004396
    Abstract: Disclosed are rigid random coils, having a contour length larger than a diameter thereof, an average bending ratio Db of 0.1˜0.8, and a weight average molecular weight of 1×108˜9×108 g/mole, and a resin composition or organic solvent composition including the same. The rigid random coils have the properties intermediate between those of polymers and rigid rod particles, and thus may be used as filler of various resins, aqueous solutions or organic solvents.
    Type: Application
    Filed: February 13, 2007
    Publication date: January 3, 2008
    Applicant: LG CHEM, LTD.
    Inventors: Heon Sang LEE, Chang Hun YUN, Heon Mo KIM