Patents by Inventor Seong Jae Choi

Seong Jae 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: 10920134
    Abstract: Disclosed herein is a method for preparing a multilayer of nanocrystals. The method comprises the steps of (i) coating nanocrystals surface-coordinated by a photosensitive compound, or a mixed solution of a photosensitive compound and nanocrystals surface-coordinated by a material miscible with the photosensitive compound, on a substrate, drying the coated substrate, and exposing the dried substrate to UV light to form a first monolayer of nanocrystals, and (ii) repeating the procedure of step (i) to form one or more monolayers of nanocrystals on the first monolayer of nanocrystals.
    Type: Grant
    Filed: March 20, 2017
    Date of Patent: February 16, 2021
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Eun Joo Jang, Shin Ae Jun, Sung Hun Lee, Jong Jin Park, Seong Jae Choi, Tae Kyung Ahn
  • Patent number: 10202545
    Abstract: Disclosed herein is a nanocrystal comprising a core comprising a first nanocrystal material, the first nanocrystal material including a Group II-VI semiconductor compound or a Group III-V semiconductor compound; a shell being disposed upon a surface of the core and comprising a second nanocrystal material, the second nanocrystal material being different from the first nanocrystal material and including a Group II-VI semiconductor compound or a Group III-V semiconductor compound; and an alloy interlayer disposed between the core and the shell, wherein the emission peak wavelength of the nanocrystal is shifted into a shorter wavelength than the emission peak wavelength of the core.
    Type: Grant
    Filed: April 28, 2017
    Date of Patent: February 12, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Shin Ae Jun, Eun Joo Jang, Seong Jae Choi
  • Patent number: 9902902
    Abstract: Disclosed herein is a quantum dot phosphor for light emitting diodes, which includes quantum dots and a solid substrate on which the quantum dots are supported. Also, a method of preparing the quantum dot phosphor is provided. Since the quantum dot phosphor of the current invention is composed of the quantum dots supported on the solid substrate, the quantum dots do not aggregate when dispensing a paste obtained by mixing the quantum dots with a paste resin for use in packaging of a light emitting diode. Thereby, a light emitting diode able to maintain excellent light emitting efficiency can be manufactured.
    Type: Grant
    Filed: October 21, 2016
    Date of Patent: February 27, 2018
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Eun Joo Jang, Mi Yang Kim, Hyung Kun Kim, Shin Ae Jun, Yong Wan Jin, Seong Jae Choi
  • Publication number: 20170237029
    Abstract: Disclosed herein is a nanocrystal comprising a core comprising a first nanocrystal material, the first nanocrystal material including a Group II-VI semiconductor compound or a Group III-V semiconductor compound; a shell being disposed upon a surface of the core and comprising a second nanocrystal material, the second nanocrystal material being different from the first nanocrystal material and including a Group II-VI semiconductor compound or a Group III-V semiconductor compound; and an alloy interlayer disposed between the core and the shell, wherein the emission peak wavelength of the nanocrystal is shifted into a shorter wavelength than the emission peak wavelength of the core.
    Type: Application
    Filed: April 28, 2017
    Publication date: August 17, 2017
    Inventors: Shin Ae JUN, Eun Joo JANG, Seong Jae CHOI
  • Publication number: 20170190966
    Abstract: Disclosed herein is a method for preparing a multilayer of nanocrystals. The method comprises the steps of (i) coating nanocrystals surface-coordinated by a photosensitive compound, or a mixed solution of a photosensitive compound and nanocrystals surface-coordinated by a material miscible with the photosensitive compound, on a substrate, drying the coated substrate, and exposing the dried substrate to UV light to form a first monolayer of nanocrystals, and (ii) repeating the procedure of step (i) to form one or more monolayers of nanocrystals on the first monolayer of nanocrystals.
    Type: Application
    Filed: March 20, 2017
    Publication date: July 6, 2017
    Inventors: Eun Joo JANG, Shin Ae JUN, Sung Hun LEE, Jong Jin PARK, Seong Jae CHOI, Tae Kyung AHN
  • Patent number: 9637682
    Abstract: Disclosed herein is a nanocrystal comprising a core comprising a first nanocrystal material, the first nanocrystal material including a Group II-VI semiconductor compound or a Group III-V semiconductor compound; a shell being disposed upon a surface of the core and comprising a second nanocrystal material, the second nanocrystal material being different from the first nanocrystal material and including a Group II-VI semiconductor compound or a Group III-V semiconductor compound; and an alloy interlayer disposed between the core and the shell, wherein the emission peak wavelength of the nanocrystal is shifted into a shorter wavelength than the emission peak wavelength of the core.
    Type: Grant
    Filed: February 5, 2015
    Date of Patent: May 2, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Shin Ae Jun, Eun Joo Jang, Seong Jae Choi
  • Patent number: 9598634
    Abstract: Disclosed herein is a method for preparing a multilayer of nanocrystals. The method comprises the steps of (i) coating nanocrystals surface-coordinated by a photosensitive compound, or a mixed solution of a photosensitive compound and nanocrystals surface-coordinated by a material miscible with the photosensitive compound, on a substrate, drying the coated substrate, and exposing the dried substrate to UV light to form a first monolayer of nanocrystals, and (ii) repeating the procedure of step (i) to form one or more monolayers of nanocrystals on the first monolayer of nanocrystals.
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: March 21, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Eun Joo Jang, Shin Ae Jun, Sung Hun Lee, Jong Jin Park, Seong Jae Choi, Tae Kyung Ahn
  • Publication number: 20170037309
    Abstract: Disclosed herein is a quantum dot phosphor for light emitting diodes, which includes quantum dots and a solid substrate on which the quantum dots are supported. Also, a method of preparing the quantum dot phosphor is provided. Since the quantum dot phosphor of the current invention is composed of the quantum dots supported on the solid substrate, the quantum dots do not aggregate when dispensing a paste obtained by mixing the quantum dots with a paste resin for use in packaging of a light emitting diode. Thereby, a light emitting diode able to maintain excellent light emitting efficiency can be manufactured.
    Type: Application
    Filed: October 21, 2016
    Publication date: February 9, 2017
    Inventors: Eun Joo JANG, Mi Yang KIM, Hyung Kun KIM, Shin Ae JUN, Yong Wan JIN, Seong Jae CHOI
  • Patent number: 9475984
    Abstract: Disclosed herein is a quantum dot phosphor for light emitting diodes, which includes quantum dots and a solid substrate on which the quantum dots are supported. Also, a method of preparing the quantum dot phosphor is provided. Since the quantum dot phosphor of the current invention is composed of the quantum dots supported on the solid substrate, the quantum dots do not aggregate when dispensing a paste obtained by mixing the quantum dots with a paste resin for use in packaging of a light emitting diode. Thereby, a light emitting diode able to maintain excellent light emitting efficiency can be manufactured.
    Type: Grant
    Filed: February 14, 2014
    Date of Patent: October 25, 2016
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Eun Joo Jang, Mi Yang Kim, Hyung Kun Kim, Shin Ae Jun, Yong Wan Jin, Seong Jae Choi
  • Patent number: 9117945
    Abstract: Disclosed are a carbon nano-tube (CNT) thin film treated with chemical having an electron withdrawing functional group and a manufacturing method thereof. Specifically, the CNT thin film comprises a CNT composition to be applied on a plastic substrate. The CNT composition comprises a CNT; and chemical connected to the CNT and having an electron withdrawing functional group. In addition, the method for manufacturing a CNT thin film comprises steps of preparing a CNT; treating the CNT with chemical having an electron withdrawing functional group; mixing the CNT treated with the chemical with a dispersing agent or dispersing solvent to prepare a CNT dispersed solution; and forming a CNT thin film with the CNT dispersed solution. According to the CNT thin film and the manufacturing method thereof, a resistance of an electrode is decreased to improve the electric conductivity of the electrode.
    Type: Grant
    Filed: February 14, 2008
    Date of Patent: August 25, 2015
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hyeon Jin Shin, Seonmi Yoon, Jaeyoung Choi, Young Hee Lee, Seong Jae Choi, Soo Min Kim
  • Patent number: 9090817
    Abstract: Disclosed herein is a quantum dot phosphor for light emitting diodes, which includes quantum dots and a solid substrate on which the quantum dots are supported. Also, a method of preparing the quantum dot phosphor is provided. Since the quantum dot phosphor of the current invention is composed of the quantum dots supported on the solid substrate, the quantum dots do not aggregate when dispensing a paste obtained by mixing the quantum dots with a paste resin for use in packaging of a light emitting diode. Thereby, a light emitting diode able to maintain excellent light emitting efficiency can be manufactured.
    Type: Grant
    Filed: February 14, 2014
    Date of Patent: July 28, 2015
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Eun Joo Jang, Mi Yang Kim, Hyung Kun Kim, Shin Ae Jun, Yong Wan Jin, Seong Jae Choi
  • Patent number: 9079244
    Abstract: Methods for producing nanoparticle thin films are disclosed. According to one of the methods, a nanoparticle thin film is produced by modifying the surface of nanoparticles to allow the nanoparticles to be charged, controlling an electrostatic attractive force between the charged nanoparticles and a substrate and a repulsive force between the individual nanoparticles by a variation in pH to control the number density of the nanoparticles arranged on the substrate.
    Type: Grant
    Filed: April 4, 2007
    Date of Patent: July 14, 2015
    Assignees: SAMSUNG ELECTRONICS CO., LTD., SEOUL NATIONAL UNIVERSITY INDUSTRY FOUNDATION
    Inventors: Seong Jae Choi, Jae Young Choi, Eun Joo Jang, Bulliard Xavier, Yu Jin Kang, Wan Ki Bae, Kook Heon Char
  • Publication number: 20150159083
    Abstract: Disclosed herein is a nanocrystal comprising a core comprising a first nanocrystal material, the first nanocrystal material including a Group II-VI semiconductor compound or a Group III-V semiconductor compound; a shell being disposed upon a surface of the core and comprising a second nanocrystal material, the second nanocrystal material being different from the first nanocrystal material and including a Group II-VI semiconductor compound or a Group III-V semiconductor compound; and an alloy interlayer disposed between the core and the shell, wherein the emission peak wavelength of the nanocrystal is shifted into a shorter wavelength than the emission peak wavelength of the core.
    Type: Application
    Filed: February 5, 2015
    Publication date: June 11, 2015
    Inventors: Shin Ae JUN, Eun Joo JANG, Seong Jae CHOI
  • Publication number: 20140158979
    Abstract: Disclosed herein is a quantum dot phosphor for light emitting diodes, which includes quantum dots and a solid substrate on which the quantum dots are supported. Also, a method of preparing the quantum dot phosphor is provided. Since the quantum dot phosphor of the current invention is composed of the quantum dots supported on the solid substrate, the quantum dots do not aggregate when dispensing a paste obtained by mixing the quantum dots with a paste resin for use in packaging of a light emitting diode. Thereby, a light emitting diode able to maintain excellent light emitting efficiency can be manufactured.
    Type: Application
    Filed: February 14, 2014
    Publication date: June 12, 2014
    Applicant: SAMSUNG ELECTRONICS CO., LTD
    Inventors: Eun Joo JANG, Mi Yang KIM, Hyung Kun KIM, Shin Ae JUN, Yong Wan JIN, Seong Jae CHOI
  • Publication number: 20140158938
    Abstract: Disclosed herein is a quantum dot phosphor for light emitting diodes, which includes quantum dots and a solid substrate on which the quantum dots are supported. Also, a method of preparing the quantum dot phosphor is provided. Since the quantum dot phosphor of the current invention is composed of the quantum dots supported on the solid substrate, the quantum dots do not aggregate when dispensing a paste obtained by mixing the quantum dots with a paste resin for use in packaging of a light emitting diode. Thereby, a light emitting diode able to maintain excellent light emitting efficiency can be manufactured.
    Type: Application
    Filed: February 14, 2014
    Publication date: June 12, 2014
    Applicant: SAMSUNG ELECTRONICS CO., LTD
    Inventors: Eun Joo JANG, Mi Yang KIM, Hyung Kun KIM, Shin Ae JUN, Yong Wan JIN, Seong Jae CHOI
  • Patent number: 8664637
    Abstract: Disclosed herein is a quantum dot phosphor for light emitting diodes, which includes quantum dots and a solid substrate on which the quantum dots are supported. Also, a method of preparing the quantum dot phosphor is provided. Since the quantum dot phosphor of the current invention is composed of the quantum dots supported on the solid substrate, the quantum dots do not aggregate when dispensing a paste obtained by mixing the quantum dots with a paste resin for use in packaging of a light emitting diode. Thereby, a light emitting diode able to maintain excellent light emitting efficiency can be manufactured.
    Type: Grant
    Filed: July 29, 2011
    Date of Patent: March 4, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Eun Joo Jang, Mi Yang Kim, Hyung Kun Kim, Shin Ae Jun, Yong Wan Jin, Seong Jae Choi
  • Patent number: 8658439
    Abstract: Disclosed herein is a quantum dot phosphor for light emitting diodes, which includes quantum dots and a solid substrate on which the quantum dots are supported. Also, a method of preparing the quantum dot phosphor is provided. Since the quantum dot phosphor of the current invention is composed of the quantum dots supported on the solid substrate, the quantum dots do not aggregate when dispensing a paste obtained by mixing the quantum dots with a paste resin for use in packaging of a light emitting diode. Thereby, a light emitting diode able to maintain excellent light emitting efficiency can be manufactured.
    Type: Grant
    Filed: November 4, 2010
    Date of Patent: February 25, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Eun Joo Jang, Mi Yang Kim, Hyung Kun Kim, Shin Ae Jun, Yong Wan Jin, Seong Jae Choi
  • Patent number: 8603836
    Abstract: Disclosed is a transparent carbon nanotube (CNT) electrode using a conductive dispersant. The transparent CNT electrode comprises a transparent substrate and a CNT thin film formed on a surface the transparent substrate wherein the CNT thin film is formed of a CNT composition comprising CNTs and a doped dispersant. Further disclosed is a method for producing the transparent CNT electrode. The transparent CNT electrode exhibits excellent conductive properties, can be produced in an economical and simple manner by a room temperature wet process, and can be applied to flexible displays. The transparent CNT electrode can be used to fabricate a variety of devices, including image sensors, solar cells, liquid crystal displays, organic electroluminescence (EL) displays and touch screen panels, that are required to have both light transmission properties and conductive properties.
    Type: Grant
    Filed: February 14, 2012
    Date of Patent: December 10, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Seon Mi Yoon, Jae Young Choi, Dong Kee Yi, Seong Jae Choi, Hyeon Jin Shin
  • Patent number: 8586458
    Abstract: Provided are a method of doping carbon nanotubes, p-doped carbon nanotubes prepared using the method, and an electrode, a display device or a solar cell including the carbon nanotubes. Particularly, a method of doping carbon nanotubes having improved conductivity by reforming the carbon nanotubes using an oxidizer, doped carbon nanotubes prepared using the method, and an electrode, a display device or a solar cell including the carbon nanotubes are provided.
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: November 19, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Seon-mi Yoon, Seong-jae Choi, Hyeon-jin Shin, Jae-young Choi, Sung-jin Kim, Young-hee Lee
  • Patent number: 8501529
    Abstract: Provided are a method of doping carbon nanotubes, p-doped carbon nanotubes prepared using the method, and an electrode, a display device or a solar cell including the carbon nanotubes. Particularly, a method of doping carbon nanotubes having improved conductivity by reforming the carbon nanotubes using an oxidizer, doped carbon nanotubes prepared using the method, and an electrode, a display device or a solar cell including the carbon nanotubes are provided.
    Type: Grant
    Filed: October 7, 2010
    Date of Patent: August 6, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Seon-mi Yoon, Seong-jae Choi, Hyeon-jin Shin, Jae-young Choi, Sung-jin Kim, Young-hee Lee