Patents by Inventor Pisit Kumnorkaew

Pisit Kumnorkaew 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).

  • Efficient light extraction method and device
    Patent number: 8076667
    Abstract: A tight emitting device comprises at least one p-type layer and at least one n-type layer and a microlens array surface. A method for improving light efficiency of a light emitting device, comprises depositing polystyrene microspheres by rapid convection deposition on surface of light emitting device; depositing a monolayer of close-packed SIO2 microspheres onto the polystyrene microspheres; and heal treating to convert the polystyrene microspheres into a planar microlayer film to provide a surface comprising substantially two-dimensional (2D) hexagonal close-packed SIO2 colloidal microsphere crystals partially imposed into a polystyrene monolayer film.
    Type: Grant
    Filed: December 24, 2007
    Date of Patent: December 13, 2011
    Assignee: Lehigh University
    Inventors: Nelson Tansu, Yik Khoon Ee, James F. Gilchrist, Pisit Kumnorkaew, Ronald A. Arif
  • EFFICIENT LIGHT EXTRACTION METHOD AND DEVICE
    Publication number: 20090315013
    Abstract: A tight emitting device comprises at least one p-type layer and at least one n-type layer and a microlens array surface. A method for improving light efficiency of a light emitting device, comprises depositing polystyrene microspheres by rapid convection deposition on surface of light emitting device; depositing a monolayer of close-packed SIO2 microspheres onto the polystyrene microspheres; and heal treating to convert the polystyrene microspheres into a planar microlayer film to provide a surface comprising substantially two-dimensional (2D) hexagonal close-packed S1O2 colloidal microsphere crystals partially imposed into a polystyrene monolayer film.
    Type: Application
    Filed: December 24, 2007
    Publication date: December 24, 2009
    Applicant: LEHIGH UNIVERSITY
    Inventors: Nelson Tansu, Yik Khoon Ee, James F. Gilchrist, Pisit Kumnorkaew, Ronald A. Arif