Discussion and Improvement of Signal to Noise Ratio on Projected Capacitive Touch Screen

摘要

In this paper, the signal to noise ratio (SNR) of projected capacitive (pro-cap) touch screen and the touch pattern designs to affect the SNR are discussed. Meanwhile, we simulate the influence of the resistance and capacitance on SNR. Simulation results verify that Clothes Pattern is better than the traditional Diamond Pattern on improvement of SNR.