Patents by Inventor Christopher J. Silk

Christopher J. Silk 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).

  • POSITION SENSOR
    Publication number: 20090184940
    Abstract: A low-cost x-y digitizing system for use in consumer electronic devices, such as portable digital assistants, mobile telephones, web browsers and the like. The digitizer includes a resonant stylus, an excitation winding for energizing the resonant stylus and a set of sensor windings for sensing the signal generated by the stylus, from which the x-y position of the stylus is determined. A novel stylus design is described together with novel digitizer windings and novel excitation and processing circuitry.
    Type: Application
    Filed: March 3, 2009
    Publication date: July 23, 2009
    Applicant: Synaptics (UK) Limited
    Inventors: Christopher J. Silk, David T.E. Ely, Andrew M. Errington, Ian Collins, Geoffrey Foote, Julian Haines, Robert Bolender, Gareth J. McCaughan
  • Position sensor
    Patent number: 7511705
    Abstract: A low cost x-y digitizing system is described for use in consumer electronic devices, such as portable digital assistants, mobile telephones, web browsers and the like. The digitizer includes a resonant stylus, an excitation winding for energizing the resonant stylus and a set of sensor windings for sensing the signal generated by the stylus, from which the x-y position of the stylus is determined. A novel stylus design is described together with novel digitizer windings and novel excitation and processing circuitry.
    Type: Grant
    Filed: May 21, 2002
    Date of Patent: March 31, 2009
    Assignee: Synaptics (UK) Limited
    Inventors: Christopher J. Silk, David T. E. Ely, Andrew Errington, Ian Collins, Geoffrey Foote, Julian Haines, Robert J. Bolender, Gareth J. McCaughan
  • Position sensor
    Publication number: 20040233178
    Abstract: A low cost x-y digitising system is described for use in consumer electronic devices, such as portable digital assistants, mobile telephones, web browsers and the like. The digitiser includes a resonant stylus, an excitation winding for energising the resonant stylus and a set of sensor windings for sensing the signal generated by the stylus, from which the x-y position of the stylus is determined. A novel stylus design is described together with novel digitiser windings and novel excitation and processing circuitry.
    Type: Application
    Filed: May 6, 2004
    Publication date: November 25, 2004
    Inventors: Christopher J Silk, David T E Ely, Andrew Errington, Ian Collins, Geoffrey Foote, Julian Haines, Robert Bolender, Gareth J McCaughan