研究目的
Investigating the implementation of force sensing in capacitive touch screen panels using piezoelectric materials to enhance human-machine interactivity.
研究成果
The proposed piezoelectric film-based touch screen panels achieve high force sensitivity with a responsivity of 0.42 V/N and a signal-to-noise ratio of 59.1 dB, offering a revolutionary solution for force sensing in capacitive touch panels.
研究不足
The study focuses on simply supported cases due to the complexity of fully clamped cases. The analysis may not fully capture edge effects where displacements are small.
1：Experimental Design and Method Selection:
The study utilizes piezoelectric materials for dynamic force detection in capacitive touch screen panels. Theoretical analysis and simulations are conducted to investigate force-voltage responsivities for different stack-ups.
2：Sample Selection and Data Sources:
Four widely used stack-ups with various panel thicknesses and touch locations are investigated. Data is sourced from simulations and theoretical models.
3：List of Experimental Equipment and Materials:
Piezoelectric films, capacitive touch screen panels, simulation software (COMSOL).
4：Experimental Procedures and Operational Workflow:
The study involves applying uniform forces over small concentric circles on the touch panel and measuring the induced voltage for force interpretation.
5：Data Analysis Methods:
The relationship between force, stress, and displacement is analyzed using Navier-Stokes double Fourier series solution and simulation results from COMSOL.
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