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Pressure sensitive writing tablet, control method and control program therefor

  • US 20020113779A1
  • Filed: 02/19/2002
  • Published: 08/22/2002
  • Est. Priority Date: 02/21/2001
  • Status: Active Grant
First Claim
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1. A pressure sensitive writing tablet comprising:

  • a touch panel for generating an output signal corresponding to a touch surface pressure distribution relating to touch locations where a writing stylus touched the touch surface;

    means for generating touch data including data on a touch location and a touch time for each touch of said writing stylus to said touch surface by sampling the output signal of said touch panel, determining if there was a touch of said writing stylus to said touch surface based on the sampled data, and, if there was a touch, detecting the touch location and touch time of said touch;

    means for determining, based on said touch data, whether each touch of said touch data is a touch on a contiguous line input on said touch panel;

    means for generating velocity data by calculating, based on said touch data, a velocity of said writing stylus at each segment of the contiguous line input on said touch surface, said velocity data including data relating to the calculated velocities;

    means for determining, based on said velocity data, a type of a line connecting the touch locations of two touches that are on the contiguous line and temporally adjacent to each other in the detection order defined as adjacent touches;

    means for producing a line drawing connecting the touch locations of the respective adjacent touches based on the line types determined by said line type determining means; and

    a display device for displaying the line drawing produced by said line drawing producing means.

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