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Electronic pen for interacting with substrate

  • US 8,284,409 B2
  • Filed: 01/09/2012
  • Issued: 10/09/2012
  • Est. Priority Date: 05/25/1999
  • Status: Expired due to Fees
First Claim
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1. An electronic pen for interacting with a substrate having a pattern of coded data printed thereon, said pen comprising:

  • an infrared light source for illuminating an area of the substrate;

    an image sensor for imaging at least some of the coded data illuminated in said area when the pen is used to interact with the substrate;

    a force sensor configured to sense interaction between the pen and the substrate;

    a processing system configured for;

    determining digital ink from the imaged coded data, said digital ink comprising a sequence of pen positions representing handwritten information;

    storing the digital ink in a memory buffer;

    determining, from the imaged coded data, whether said pen is positioned within a predetermined functional zone of said substrate; and

    initiating a response in said pen in the event that the pen is positioned within the predetermined functional zone,wherein the response is initiated without reference to a remote computer system.

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