In-Cell Capacitance Touch-Panel with Improved Sensitivity

摘要

We present a novel pixel circuit for an in-cell capacitive type force-sensitive touch panel The TFT based capacitance sensor system comprises an active pixel sensor circuit with novel sensing capacitor structure and in-pixel amplification to achieve a high sensitivity. The observed 8.5x increase in sensitivity over standard methods provides a practical solution to obtain a robust, mechanically compact and low-cost force sensitive multi-touch panel.