Alternating panel charge sharing technique for touch screen panel self-capacitance sensing IC

Abstract

This Letter presents a self-capacitance sensing (SCS) technique for touch screen panel with the alternating panel charge sharing (APCS) that effectively suppresses low-frequency noise and achieves a better signal-to-noise ratio (SNR). With the proposed APCS-based SCS, SNR is improved in measurement by 7.65 dB compared to the conventional panel charge sharing-based SCS. © 2020 The Institution of Engineering and Technology.