PRESSURE SENSITIVE DEVICE

This device is a touch screen or touch keyboard having a surface (1) and using force or pressure sensors (T1-T4) to measure force applied by the finger to the surface. Calculation of the position of the finger at areas not directly overlying any of the sensors is carried out on the basis of the data from the sensors. Three or four such sensors may be used. In addition to those sensors, there is a further sensor (T5) to which a weight (4) is attached to measure the forces applied to the screen or keyboard as a whole to compensate in the calculations for movements (change of orientation) of the screen or keyboard.