Design of force measurement module for force touch screens

Abstract

This paper presents a foce touch technology that uses strain gauge sensors for next-generation 3D touch screens. We developed a force measurement module using strain gauges, and configured a system that was identifiable according to touch pressure, and tested the force measurement module. We found that the thickness of the base pad in the force measurement module is very important for touch sensitivity, and carried out thickness optimization of the base pad. We successfully conducted an experiment to display touch signals on a screen with various touch pressure and multi-touch testing. This study confirmed the possibility of applying to the force touch screen using the force measurement module.