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Pen-based form computer

  • US 5,347,477 A
  • Filed: 03/02/1993
  • Issued: 09/13/1994
  • Est. Priority Date: 01/28/1992
  • Status: Expired due to Term
First Claim
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1. A pen-base form computer comprising:

  • a palm-top computer being compatible with personal computers on data and file format and operated through form control, said palm-top computer being capable of receiving data input through a hand-writing operation and being either for independent use or on-line operation with external computer mainframes;

    a hand-writing display and input device comprising a touch control panel overlaid a LCD display to receive touch data or signals from a pen or the fingers;

    a gesture control unit for controlling the operations of recognition, insert, delete, escape, alter, scroll up, scroll down, scroll left, scroll right;

    a hand writing style training unit for recognition the user'"'"'s writing style through a learning procedure to learn particular characters written by the user;

    a form making unit to define port definition by making port geometry through gesture control and linking fixed format data field and free format field automatically without inputting any computer software program;

    a form processing unit being to drive different form operations through a page zero unit via a window control unit according to different gestures, said form processing unit needing only one memory space for its executing code while processing multiple forms and comprising a graphic/text recognition unit to receive input data;

    a pen input device unit being to obtain the non-distortion point by means of center point smoothing and moving window smoothing; and

    an on-line character recognition unit to recognize input characters according to stroke sectioning, stroke'"'"'s length, angle, sequence, velocity, Pen Up to Pen Down distance and angle by means of the a Dynamic Programming.

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