Patents by Inventor Joayoung Jeong

Joayoung Jeong 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).

  • High quantum yield infranred phosphors and methods of making phosphors
    Publication number: 20090095940
    Abstract: Embodiments of the present disclosure include Gd3+—Nd3+ infrared phosphor compositions, methods of making Gd3+—Nd3+ infrared phosphor compositions, and the like.
    Type: Application
    Filed: July 7, 2008
    Publication date: April 16, 2009
    Inventors: Richard S. Meltzer, Sergey Feofilov, Yi Zhou, Douglas Keszler, Joayoung Jeong, Weiyi Jia
  • Yellow ZnS-based phosphor, process of preparing the same and display device using the phosphor
    Patent number: 7264751
    Abstract: A yellow ZnS-based phosphor having improved color coordinates and luminance for use in intermediate- and low-voltage display devices using improved activators and coactivators has color coordinates (x, y) shifting to a yellow emission as the amount of an activator is increased. Therefore, the ZnS: (Au or Cu), In phosphor can be advantageously utilized for various display applications including vacuum fluorescent displays (VFDs) and field emission displays (FEDs).
    Type: Grant
    Filed: February 20, 2003
    Date of Patent: September 4, 2007
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Sanghyuk Lee, Sanghoon Shin, Yongchan You, Joayoung Jeong
  • Yellow ZnS-based phosphor, process of preparing the same and display device using the phosphor
    Patent number: 7067073
    Abstract: A yellow ZnS-based phosphor which has improved color coordinates and luminance for use in intermediate- and low-voltage display devices using improved activators and coactivators is a (ZnS: Mn, Cu) phosphor which has color coordinates (x, y) shifting to a yellow emission as the amount copper added as an activator is increased. The phosphor has enhanced luminance by adding a trivalent metal as a coactivator. Therefore, the (ZnS: Mn, Cu) phosphor can be advantageously utilized for various display applications including vacuum fluorescent displays (VFDs) and field emission displays (FEDs).
    Type: Grant
    Filed: February 20, 2003
    Date of Patent: June 27, 2006
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Sanghyuk Lee, Kyuchan Park, Sanghoon Shin, Yongchan You, Joayoung Jeong
  • Yellow ZnS-based phosphor, process of preparing the same and display device using the phosphor
    Publication number: 20040100185
    Abstract: A yellow ZnS-based phosphor having improved color coordinates and luminance for use in intermediate- and low-voltage display devices using improved activators and coactivators has color coordinates (x, y) shifting to a yellow emission as the amount of an activator is increased. Therefore, the ZnS: (Au or Cu), In phosphor can be advantageously utilized for various display applications including vacuum fluorescent displays (VFDs) and field emission displays (FEDs).
    Type: Application
    Filed: February 20, 2003
    Publication date: May 27, 2004
    Applicant: Samsung SDI Co., Ltd.
    Inventors: Sanghyuk Lee, Sanghoon Shin, Yongchan You, Joayoung Jeong
  • Yellow ZnS-based phosphor, process of preparing the same and display device using the phosphor
    Publication number: 20030197460
    Abstract: A yellow ZnS-based phosphor which has improved color coordinates and luminance for use in intermediate- and low-voltage display devices using improved activators and coactivators is a (ZnS: Mn, Cu) phosphor which has color coordinates (x, y) shifting to a yellow emission as the amount copper added as an activator is increased. The phosphor has enhanced luminance by adding a trivalent metal as a coactivator. Therefore, the (ZnS: Mn, Cu) phosphor can be advantageously utilized for various display applications including vacuum fluorescent displays (VFDs) and field emission displays (FEDs).
    Type: Application
    Filed: February 20, 2003
    Publication date: October 23, 2003
    Applicant: Samsung SDI Co., Ltd.
    Inventors: Sanghyuk Lee, Kyuchan Park, Sanghoon Shin, Yongchan You, Joayoung Jeong