Pen computer with character recognition in pen using writing head ball contacting X and Y direction balls that are mounted on respective shafts

摘要

Ball 15 is moved across paper and can be supplied with ink through supply unit 14. Movement of ball 15 is tracked in orthogonal "X" and "Y" directions (shown schematically ) by contacting balls 20, 21 mounted on respective shafts 220. Sensing units 24 generate signals in response to detected movement of shafts 220.