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Optica Publishing Group
  • Journal of Display Technology
  • Vol. 11,
  • Issue 2,
  • pp. 165-169
  • (2015)

Position Tracking Based on Particle Filter for Self-Capacitance Single-Touch Screen Panels

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Abstract

This work presents a novel particle filter (PF) method to track nonlinear and non-Gaussian dynamic state-space models (DSSMs) for a capacitive touch panel system to achieve an accurate touch position and smooth trajectory when the touch movement changes rapidly with a nonlinear trajectory. Touched positions in the axis-intersect method are also detected using a micro-controller unit (MCU) and a sensor integrated circuit (IC). Additionally, the proposed PF method is designed to achieve the trajectory tracking of calculated positions timely. Experimental results demonstrate that the proposed PF method offers a better root mean square error (RMSE) of linear and nonlinear tracking trajectories than that of the Kalman filter (KF) based on the capacitive touch panel (CTP).

© 2014 IEEE

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