Patent ID: 6330359
Filing Date: 2001-12-11
Classification: G06F,G06K

Abstract:
A pen-grip type of input device comprising:a support body adapted to be attached to a pen,pressure detecting means provided on the support body and having sensor parts corresponding to at least two fingers of a writer, each of said sensor parts detecting changes in pressure in a direction perpendicular to a longitudinal axis of a pen caused by the corresponding finger of the writer, said sensor parts being provided around the support body;unit waveform generating means for obtaining outputs of the pressure detecting means showing changes in pressure of each finger and for obtaining a write start point and a write end point of each finer on the basis of the pressure change, and for generating a unit waveform corresponding to each finger, each of said unit waveforms starting from a first one of the write start points of the fingers and ending at a last one of the write end points of the fingers, said unit waveforms corresponding to a single letter, character, numeral, figure or symbol inputted by the writer;analyzing means for analyzing the unit waveforms to obtain waveform characteristics of the waveforms, and for identifying letters, characters, numerals, figures or symbols which are written by the writer, by comparing the waveform characteristics with reference waveform characteristics which are pre-learned and pre-stored waveform characteristic of letters, characters, numerals, figures or symbols pre-written by the writer, andsaid unit waveform generating means picks out the unit waveforms on the basis of threshold level.