Patents by Inventor Duncan L. B. Smith

Duncan L. B. Smith 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).

  • Patent number: 7868562
    Abstract: The present invention provides a system and method for controlling one or more light-emitting elements which are driven by forward currents to generate mixed light for use, for example, through a luminaire. The system has one or more light sensors for acquiring feedback optical sensor data and a user interface for providing reference data representative of a desired mixed light. The system also has a controller for transforming either the sensor data or the reference data into the coordinate space of the other and to determine a difference between the sensor and the reference data in that coordinate space. The controller is configured to adjust the forward currents during operating conditions so that the sensor data matches the setpoint data. The present invention also provides a system and method that can at least partially compensate certain temperature induced effects when transforming the optical sensor or the reference data.
    Type: Grant
    Filed: December 11, 2007
    Date of Patent: January 11, 2011
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Marc Salsbury, Ian Ashdown, Duncan L. B. Smith, Shane P. Robinson, Ingo Speier
  • Publication number: 20080215279
    Abstract: The present invention provides a system and method for controlling one or more light-emitting elements which are driven by forward currents to generate mixed light for use, for example, through a luminaire. The system has one or more light sensors for acquiring feedback optical sensor data and a user interface for providing reference data representative of a desired mixed light. The system also has a controller for transforming either the sensor data or the reference data into the coordinate space of the other and to determine a difference between the sensor and the reference data in that coordinate space. The controller is configured to adjust the forward currents during operating conditions so that the sensor data matches the setpoint data. The present invention also provides a system and method that can at least partially compensate certain temperature induced effects when transforming the optical sensor or the reference data.
    Type: Application
    Filed: December 11, 2007
    Publication date: September 4, 2008
    Applicant: TIR Technology LP
    Inventors: Marc Salsbury, Ian Ashdown, Duncan L. B. Smith, Shane P. Robinson, Ingo Speier
  • Publication number: 20080136334
    Abstract: A system and method for controlling lighting are described. In general, the system and method may be used for controlling generation of light from the one or more lighting devices within a lighting system, in response to an external input. The control system generally comprises a control interface module and a light generation module. The control interface module is configured to receive the external input and convert same in accordance with a predefined internal control protocol. The light generation module is communicatively linked to the control interface module to receive the converted input and is operatively linked to the one or more light-emitting element modules for controlling generation of light thereby in accordance with the converted input. In one example, the light generation module is either interchangeable or interchangeably adaptable to receive the external input in accordance with one of two or more control protocols.
    Type: Application
    Filed: December 12, 2007
    Publication date: June 12, 2008
    Inventors: Shane P. Robinson, Bojana Bjeljac, Duncan L. B. Smith, Stefan Poli