Patents by Inventor Lizhu Lu

Lizhu Lu 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).

  • Phosphors with long-persistent green phosphorescence
    Patent number: 6267911
    Abstract: This invention relates to phosphors including long-persistence green phosphors. Phosphors of the invention are represented by the general formula: MkAl2O4:2xEu2+,2yR3+ wherein k−1-2x-2y, x is a number ranging from about 0.0001 to about 0.05, y is a number ranging from about x to about 3x, M is an alkaline earth metal, and R3+ is one or more trivalent metal ions. Phosphors of this invention include powders, ceramics, single crystals and single crystal fibers. A method of manufacturing improved phosphors and a method of manufacturing single crystal phosphors are also provided.
    Type: Grant
    Filed: November 6, 1998
    Date of Patent: July 31, 2001
    Assignees: University of Georgia Research Foundation, Inc., University of Puerto Rico
    Inventors: William M Yen, Weiyi Jia, Lizhu Lu, Huabiao Yuan
  • Long-persistence blue phosphors
    Patent number: 6117362
    Abstract: This invention relates to phosphors including long-persistence blue phosphors. Phosphors of the invention are represented by the general formula:MO . mAl.sub.2 O.sub.3 :Eu.sup.2+,R.sup.3+wherein m is a number ranging from about 1.6 to about 2.2, M is Sr or a combination of Sr with Ca and Ba or both, R.sup.3+ is a trivalent metal ion or trivalent Bi or a mixture of these trivalent ions, Eu.sup.2+ is present at a level up to about 5 mol % of M, and R.sup.3+ is present at a level up to about 5 mol % of M. Phosphors of this invention include powders, ceramics, single crystals and single crystal fibers. A method of manufacturing improved phosphors and a method of manufacturing single crystal phosphors are also provided.
    Type: Grant
    Filed: November 6, 1998
    Date of Patent: September 12, 2000
    Assignees: University of Georgia Research Foundation, Inc., University of Puerto Rico
    Inventors: William M. Yen, Weiyi Jia, Lizhu Lu, Huabiao Yuan