Non-linear resistive touch sensor

摘要

A touch sensor has a support layer (12) of an insulating material and a resistive layer (13) applied to the support layer. A resistive material is shaped according to an elongated pattern forming a sequence of touch positions, and has a single terminal (16) to be coupled to a sense input (17) of a detecting device (11), while an open end (15) of the sequence opposite to the terminal end remains unconnected. The detecting device detects an active resistance (R_p) between the single terminal and one of said touch positions that is touched by a user via a return capacitance constituted (C_u) by the user and a mass element (18) coupled to the detecting device. Advantageously only a single terminal is necessary, whereas a number of touch positions can be discriminated.