1. Piezoelectric vs. Capacitive Based Force Sensing in Capacitive Touch Panels
- Author
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Shuo Gao, Victor Arcos, and Arokia Nathan
- Subjects
Force sensing ,capacitive touchscreen panel ,sensitivity ,piezoelectric film ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 - Abstract
High sensitivity force sensing is a desirable function of capacitance touch screen panels. In this paper, we report on a dynamic force detection technique by utilizing piezoelectric materials. The force-voltage responsivities are investigated for four widely used stack-ups, with various panel thicknesses and touch locations. Based on the theoretical analysis and simulation results, the maximum responsivity and the signal-to-noise ratio are achieved at 0.42 V/N and 59.1 dB, respectively. The proposed technique implements force sensing successfully, enhancing the human-machine interactivity experience.
- Published
- 2016
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