Patent ID: 6788297
Filing Date: 2004-09-07
Classification: G06F

Abstract:
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, wherein said line type determining means sets, as a connecting line between two touch locations of adjacent touches, a line having a less curvature when the velocity of said writing stylus between said two touch locations on said touch surface is high than when the velocity is low; 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.