Digital pen converting handwritten characters into machine text has pen movement sensor and piezo sensors for detecting fingertip pressure and writing pressure

摘要

The digital pen has sensor ball at the bottom end of the pen, which rotates during the writing movement, a writing channel filled with a writing fluid, a magnetic needle contained within a magnetic field, and piezoelectric pressure sensors for detecting the fingertip pressure and a piezoelectric ring to detect the writing pressure. Detected analogue values are converted into digital values.