Patents by Inventor James Chienchung Shih

James Chienchung Shih 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).

  • Phosphor compositions and methods of making the same
    Patent number: 9567518
    Abstract: Disclosed herein are emissive ceramic elements having low amounts of certain trace elements. Applicants have surprisingly found that a lower internal quantum efficiency (IQE) may be attributed to specific trace elements that, even at very low amounts (e.g., 50 ppm or less), can cause significant deleterious effects on IQE. In some embodiments, the emissive ceramic element includes a garnet host material and an amount of Ce dopant. The emissive ceramic element may, in some embodiments, have an amount of Na in the composition less than about 67 ppm, an amount of Mg in the composition less than about 23 ppm, or an amount of Fe in the composition less than about 21 ppm.
    Type: Grant
    Filed: September 25, 2014
    Date of Patent: February 14, 2017
    Assignee: NITTO DENKO CORPORATION
    Inventors: Hiroaki Miyagawa, Bin Zhang, James Chienchung Shih
  • PHOSPHOR COMPOSITIONS AND METHODS OF MAKING THE SAME
    Publication number: 20150008818
    Abstract: Disclosed herein are emissive ceramic elements having low amounts of certain trace elements. Applicants have surprisingly found that a lower internal quantum efficiency (IQE) may be attributed to specific trace elements that, even at very low amounts (e.g., 50 ppm or less), can cause significant deleterious effects on IQE. In some embodiments, the emissive ceramic element includes a garnet host material and an amount of Ce dopant. The emissive ceramic element may, in some embodiments, have an amount of Na in the composition less than about 67 ppm, an amount of Mg in the composition less than about 23 ppm, or an amount of Fe in the composition less than about 21 ppm.
    Type: Application
    Filed: September 25, 2014
    Publication date: January 8, 2015
    Inventors: HIROAKI MIYAGAWA, BIN ZHANG, JAMES CHIENCHUNG SHIH
  • Phosphor compositions and methods of making the same
    Patent number: 8871114
    Abstract: Disclosed herein are emissive ceramic elements having low amounts of certain trace elements. Applicants have surprisingly found that a lower internal quantum efficiency (IQE) may be attributed to specific trace elements that, even at very low amounts (e.g., 50 ppm or less), can cause significant deleterious effects on IQE. In some embodiments, the emissive ceramic element includes a garnet host material and an amount of Ce dopant. The emissive ceramic element may, in some embodiments, have an amount of Na in the composition less than about 67 ppm, an amount of Mg in the composition less than about 23 ppm, or an amount of Fe in the composition less than about 21 ppm.
    Type: Grant
    Filed: August 15, 2012
    Date of Patent: October 28, 2014
    Assignee: Nitto Denko Corporation
    Inventors: Hiroaki Miyagawa, Bin Zhang, James Chienchung Shih
  • PHOSPHOR COMPOSITIONS AND METHODS OF MAKING THE SAME
    Publication number: 20130069007
    Abstract: Disclosed herein are emissive ceramic elements having low amounts of certain trace elements. Applicants have surprisingly found that a lower internal quantum efficiency (IQE) may be attributed to specific trace elements that, even at very low amounts (e.g., 50 ppm or less), can cause significant deleterious effects on IQE. In some embodiments, the emissive ceramic element includes a garnet host material and an amount of Ce dopant. The emissive ceramic element may, in some embodiments, have an amount of Na in the composition less than about 67 ppm, an amount of Mg in the composition less than about 23 ppm, or an amount of Fe in the composition less than about 21 ppm.
    Type: Application
    Filed: August 15, 2012
    Publication date: March 21, 2013
    Applicant: NITTO DENKO CORPORATION
    Inventors: Hiroaki Miyagawa, Bin Zhang, James Chienchung Shih