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Writing device for storing handwriting

  • US 5,215,397 A
  • Filed: 03/30/1992
  • Issued: 06/01/1993
  • Est. Priority Date: 04/01/1991
  • Status: Expired due to Fees
First Claim
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1. A writing device for storing locus data which represents contacting movements which occur when said writing device moves during contact with a writing surface and non-contacting movements which occur when said writing device is not in contact with a writing surface, said writing device comprising:

  • writing means;

    stress sensor means for detecting force applied to said writing means while said writing means is moved in contact with said writing surface for sensing handwriting on said writing surface;

    optical sensing means for optically detecting relative positions of said writing means and handwriting written thereby when said writing means has been moved while not in contact with said writing surface;

    locus detection means for detecting said contacting movements and said non-contacting movements of said writing means based upon signals output from said stress sensor means and said optical sensing means, and providing locus data representative thereof;

    storing means for storing said detected locus data; and

    casing means for housing said writing means, said stress sensor means, said optical sensing means, and said storing means therein.

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