Patents by Inventor Byungchul Choi

Byungchul 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: 11646398
    Abstract: A semiconductor light emitting device including a semiconductor laminate having first and second surfaces, the semiconductor laminate including first and second conductivity-type semiconductor layers, and an active layer between the semiconductor layers; a partition structure on the first surface, the partition structure having a window defining a light emitting region of the first surface of the semiconductor laminate; a wavelength converter in the window, the wavelength converter being configured to convert a wavelength of light emitted from the active layer; and a first electrode and a second electrode on the second surface of the semiconductor laminate and respectively connected to the first conductivity-type semiconductor layer and the second conductivity-type semiconductor layer, wherein the semiconductor laminate includes a plurality of first patterns arranged in the light emitting region of the first surface, and a plurality of second patterns arranged in a covered region of the first surface contacti
    Type: Grant
    Filed: May 18, 2021
    Date of Patent: May 9, 2023
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kiwon Park, Namsung Kim, Youngsub Shin, Jonghyun Lee, Daemyung Chun, Byungchul Choi
  • Publication number: 20220199679
    Abstract: A semiconductor light emitting device is provided. The semiconductor light emitting device includes a plurality of light emitting structures, each of which includes a first surface and a second surface, a plurality of embossed portions provided on the first surface; a partition wall structure provided on the first surface of the plurality of light emitting structures and including a plurality of partition walls which define a plurality of pixel spaces; and a fluorescent layer provided in the plurality of pixel spaces. A bottom surface of the partition wall structure contacts the plurality of embossed portions.
    Type: Application
    Filed: December 6, 2021
    Publication date: June 23, 2022
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kiwon PARK, Geunwoo KO, Inho KIM, Sungwook LEE, Jonghyun LEE, Byungchul CHOI
  • Publication number: 20220085257
    Abstract: A semiconductor light emitting device including a semiconductor laminate having first and second surfaces, the semiconductor laminate including first and second conductivity-type semiconductor layers, and an active layer between the semiconductor layers; a partition structure on the first surface, the partition structure having a window defining a light emitting region of the first surface of the semiconductor laminate; a wavelength converter in the window, the wavelength converter being configured to convert a wavelength of light emitted from the active layer; and a first electrode and a second electrode on the second surface of the semiconductor laminate and respectively connected to the first conductivity-type semiconductor layer and the second conductivity-type semiconductor layer, wherein the semiconductor laminate includes a plurality of first patterns arranged in the light emitting region of the first surface, and a plurality of second patterns arranged in a covered region of the first surface contacti
    Type: Application
    Filed: May 18, 2021
    Publication date: March 17, 2022
    Inventors: Kiwon PARK, Namsung KIM, Youngsub SHIN, Jonghyun LEE, Daemyung CHUN, Byungchul CHOI
  • Patent number: 8192874
    Abstract: Disclosed is a lithium secondary battery using a cathode containing a lithium-containing transition metal oxide and an anode containing graphitized carbon, characterized in that an ammonium compound capable of providing ammonium ions is added to a non-aqueous electrolyte. Therefore, the present invention provides a lithium secondary battery having improved high-temperature performance by reducing decreases of residual capacity and recovery capacity resulting from high-temperature storage of the battery, via addition of such an ammonium compound.
    Type: Grant
    Filed: November 13, 2009
    Date of Patent: June 5, 2012
    Assignee: LG Chem, Ltd.
    Inventors: Soo ik Jo, Jisang Yu, Byungchul Choi, Changjoo Han
  • Publication number: 20100055575
    Abstract: Disclosed is a lithium secondary battery using a cathode containing a lithium-containing transition metal oxide and an anode containing graphitized carbon, characterized in that an ammonium compound capable of providing ammonium ions is added to a non-aqueous electrolyte. Therefore, the present invention provides a lithium secondary battery having improved high-temperature performance by reducing decreases of residual capacity and recovery capacity resulting from high-temperature storage of the battery, via addition of such an ammonium compound.
    Type: Application
    Filed: November 13, 2009
    Publication date: March 4, 2010
    Applicant: LG CHEM, LTD.
    Inventors: Soo ik JO, Jisang YU, Byungchul CHOI, Changjoo HAN
  • Patent number: 7638229
    Abstract: Disclosed is a lithium secondary battery using a cathode containing a lithium-containing transition metal oxide and an anode containing graphitized carbon, characterized in that an ammonium compound capable of providing ammonium ions is added to a non-aqueous electrolyte. Therefore, the present invention provides a lithium secondary battery having improved high-temperature performance by reducing decreases of residual capacity and recovery capacity resulting from high-temperature storage of the battery, via addition of such an ammonium compound.
    Type: Grant
    Filed: February 13, 2006
    Date of Patent: December 29, 2009
    Assignee: LG Chem, Ltd.
    Inventors: Soo ik Jo, Jisang Yu, Byungchul Choi, Changjoo Han
  • Publication number: 20070003824
    Abstract: Disclosed is a lithium secondary battery using a cathode containing a lithium-containing transition metal oxide and an anode containing graphitized carbon, characterized in that an ammonium compound capable of providing ammonium ions is added to a non-aqueous electrolyte. Therefore, the present invention provides a lithium secondary battery having improved high-temperature performance by reducing decreases of residual capacity and recovery capacity resulting from high-temperature storage of the battery, via addition of such an ammonium compound.
    Type: Application
    Filed: February 13, 2006
    Publication date: January 4, 2007
    Inventors: Soo Jo, Jisang Yu, Byungchul Choi, Changjoo Han