Patents by Inventor Lawrence Bruce Hewitt

Lawrence Bruce Hewitt 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).

  • Interactive system with successively activated illumination sources
    Patent number: 9329700
    Abstract: An illumination assembly for an interactive input system (20), comprises at least one imaging device (60) capturing image frames of a region of interest; a plurality of illumination sources (84a, 84b, 84c) associated with the imaging device and being located at different positions relative to the imaging device, the illumination sources providing illumination to the region of interest; and a controller (72) communicating with the illumination sources, the controller conditioning the illumination sources so that the illumination sources provide illumination to the region of interest in succession, the timing of image frame capture by the imaging device being coordinated with the illumination pattern of the illumination sources.
    Type: Grant
    Filed: January 14, 2011
    Date of Patent: May 3, 2016
    Assignee: SMART TECHNOLOGIES ULC
    Inventors: Grant McGibney, David Holmgren, Lawrence Bruce Hewitt
  • Interactive input system and method
    Patent number: 9274615
    Abstract: An interactive input system comprises at least two imaging assemblies capturing image frames of a region of interest from different vantages, each imaging assembly comprising an image sensor and signal processing circuitry implemented on an application specific integrated circuit (ASIC), image data acquired by the image sensor being pre-processed by the signal processing circuitry; and processing structure processing pre-processed image data output by the imaging assemblies to determine the location of at least one pointer within the region of interest.
    Type: Grant
    Filed: November 13, 2012
    Date of Patent: March 1, 2016
    Assignee: PixArt Imaging Inc.
    Inventors: Clinton Lam, Lawrence Bruce Hewitt, Trevor Akitt, Charles Ung
  • INTERACTIVE SYSTEM WITH SUCCESSIVELY ACTIVATED ILLUMINATION SOURCES
    Publication number: 20140022448
    Abstract: An illumination assembly for an interactive input system (20), comprises at least one imaging device (60) capturing image frames of a region of interest; a plurality of illumination sources (84a, 84b, 84c) associated sociated with the imaging device and being located at different positions relative to the imaging device, the illumination sources providing illumination to the region of interest; and a controller (72) communicating with the illumination sources, the controller conditioning the illumination sources so that the illumination sources provide illumination to the region of interest in succession, the timing of image frame capture by the imaging device being coordinated with the illumination pattern of the illumination sources.
    Type: Application
    Filed: January 14, 2011
    Publication date: January 23, 2014
    Applicant: SMART TECHNOLOGIES ULC
    Inventors: Grant McGibney, David Holmgren, Lawrence Bruce Hewitt