I. Introduction
Owing to the advantages of high durability, high optical transmissivity, and multi-touch capability, the capacitive touch screens have become mainstream input device in many applications, such as smart phone, tablet PC, wearable device, 3D or 4D visualization interactions and commercial office etc [1] –[4]. Design of touch screen system with low cost, low power, high responsiveness, and noise immunity is indubitably desired in academic and commercial fields.