Multi-way interactive capacitive touch system with palm rejection of active stylus for 86” touch screen panels

Abstract

There have been many recent advances in capacitive touch systems (CTSs) [1-5]. Multiple-way interactive CTSs (MI-CTSs) that can simultaneously communicate with each other on a real-time basis have been demanded; however, such MI-CTSs have not yet been reported. In addition, palm rejection in an active stylus would be a very useful feature for when the palm inevitably touches a touch screen panel (TSP) [5]. In this paper, an MI-CTS with the palm rejection for an active stylus is reported. This allows simultaneous interaction between CTSs on a real-time basis, while lessening the computational load.