Patents by Inventor Bojana Bjeljac

Bojana Bjeljac 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: 7973495
    Abstract: The present invention provides a method and apparatus for adaptive control of a solid-state lighting system consisting of one or more groups of one or more light-emitting elements The invention comprises a voltage control device to provide each group with an independently controllable voltage A feedback system to detect and generate a signal representative of drive currents through the one or more groups A computing device then adaptively evaluates, based on the signal, a required voltage that achieves a desired respective drive current in each of the one or more groups.
    Type: Grant
    Filed: March 12, 2007
    Date of Patent: July 5, 2011
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Toma Ion, Shahriar Mohammadi, Bojana Bjeljac, Paul Jungwirth
  • Publication number: 20090326730
    Abstract: The present invention provides a method and apparatus for controlling the activation of an electronic device. For a desired activation ratio, which defines the “ON” time relative to the “OFF” time of the electronic device for a given time period, the method and apparatus according to the present invention evaluates an activation sequence. The activation sequence comprises two or more activation time periods and one or more deactivation periods, wherein the ratio between the two or more activation periods and the predetermined time period is equivalent to the desired activation ratio.
    Type: Application
    Filed: March 14, 2007
    Publication date: December 31, 2009
    Applicant: TIR TECHNOLOGY LP
    Inventors: Bojana Bjeljac, Ian Ashdown, Ion Toma
  • Publication number: 20090058322
    Abstract: The present invention provides a method and apparatus for adaptive control of a solid-state lighting system consisting of one or more groups of one or more light-emitting elements The invention comprises a voltage control device to provide each group with an independently controllable voltage A feedback system to detect and generate a signal representative of drive currents through the one or more groups A computing device then adaptively evaluates, based on the signal, a required voltage that achieves a desired respective drive current in each of the one or more groups.
    Type: Application
    Filed: March 12, 2007
    Publication date: March 5, 2009
    Applicant: TIR TECHNOLOGY LP
    Inventors: Ion Toma, Shahriar Mohammadi, Bojana Bjeljac, Paul Jungwirth
  • 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