Patents by Inventor Padmanabha Rao Ravillisetty

Padmanabha Rao Ravillisetty 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).

  • LED-based illumination modules with thin color converting layers
    Patent number: 8425065
    Abstract: An illumination module includes a plurality of Light Emitting Diodes (LEDs). The illumination module may include a reflective color converting element with a PTFE layer and a color converting layer fixed to the PTFE layer. The color converting layer includes phosphor particles embedded in a polymer matrix and has a thickness that is less than five times an average diameter of the phosphor particles. The illumination module may include a transmissive color converting element. The color converting elements may be produced by mixing a polymer binder with a solvent and phosphor particles to form a homogeneous suspension of the phosphor particles. The homogeneous suspension is applied to a surface to form an uncured color converting layer, which is heated to vaporize the solvent. The cured color converting layer includes the phosphor particles suspended in the polymer binder.
    Type: Grant
    Filed: December 16, 2011
    Date of Patent: April 23, 2013
    Assignee: Xicato, Inc.
    Inventors: Padmanabha Rao Ravillisetty, Gerard Harbers
  • LED-BASED ILLUMINATION MODULES WITH THIN COLOR CONVERTING LAYERS
    Publication number: 20120087124
    Abstract: An illumination module includes a plurality of Light Emitting Diodes (LEDs). The illumination module may include a reflective color converting element with a PTFE layer and a color converting layer fixed to the PTFE layer. The color converting layer includes phosphor particles embedded in a polymer matrix and has a thickness that is less than five times an average diameter of the phosphor particles. The illumination module may include a transmissive color converting element. The color converting elements may be produced by mixing a polymer binder with a solvent and phosphor particles to form a homogeneous suspension of the phosphor particles. The homogeneous suspension is applied to a surface to form an uncured color converting layer, which is heated to vaporize the solvent.
    Type: Application
    Filed: December 16, 2011
    Publication date: April 12, 2012
    Applicant: Xicato, Inc.
    Inventors: Padmanabha Rao Ravillisetty, Gerard Harbers