Low energy and latency touch detection using group testing

This paper presents a novel touch detection scheme on a capacitive touch screen with reduced sensing latency and low power consumption. We make use of the fact that a small number of touch sensors have appreciable changes in their capacitance values corresponding to the touch locations; this enables reduction in energy consumption via sensing fewer number of measurements compared to the standard approach. In particular, we use the concept of group testing for designing our touch detection scheme. We demonstrate simulation results confirming that the detection performance of our scheme is comparable to the standard method with significantly lower energy requirement.