Patents by Inventor Pasi Tapani Laakkonen

Pasi Tapani Laakkonen 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).

  • Layered light guide with diffractive structures
    Patent number: 7798699
    Abstract: A layered light guide structure has a number of planar light guides arranged in a stack to receive a number of different color light beams from the edge of the light guides. Each of the planar light guides has one or more diffractive structures imparted or provided on its upper surface. The diffractive structures on each light guide are configured to diffract light of a particular wavelength range so that they efficiently diffract the guided light within that light guide. The diffractive structure can be one or more keypad symbols such that the layered light guide structure can be used as a keypad. The symbols can be pixelized such that the pixels can have different color patterns. The diffractive structure can also be a simple patch so that the layered light guide structure can be used as a back-light source.
    Type: Grant
    Filed: November 10, 2008
    Date of Patent: September 21, 2010
    Assignee: Nokia Corporation
    Inventors: Pauli Laitinen, Max Lindfors, Lea Myyryläinen, Pasi Tapani Laakkonen
  • Layered light guide with diffractive structures
    Publication number: 20100118403
    Abstract: A layered light guide structure has a number of planar light guides arranged in a stack to receive a number of different color light beams from the edge of the light guides. Each of the planar light guides has one or more diffractive structures imparted or provided on its upper surface. The diffractive structures on each light guide are configured to diffract light of a particular wavelength range so that they efficiently diffract the guided light within that light guide. The diffractive structure can be one or more keypad symbols such that the layered light guide structure can be used as a keypad. The symbols can be pixelized such that the pixels can have different color patterns. The diffractive structure can also be a simple patch so that the layered light guide structure can be used as a back-light source.
    Type: Application
    Filed: November 10, 2008
    Publication date: May 13, 2010
    Inventors: Pauli Laitinen, Max Lindfors, Lea Myyrylainen, Pasi Tapani Laakkonen