Open AccessA Touchpad for Force and Location Sensing
Author(s) -
Kim DongKi,
Kim JongHo,
Kwon HyunJoon,
Kwon YoungHa
Publication year - 2010
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.10.1510.0073
Subject(s) - touchpad , materials science , computer science , biomedical engineering , computer hardware , engineering
This paper presents the design and fabrication model of a touchpad based on a contact‐resistance‐type force sensor. The touchpad works as a touch input device, which can sense contact location and contact force simultaneously. The touchpad is 40 mm wide and 40 mm long. The touchpad is fabricated by using a simple screen printing technique. The contact location is evaluated by the calibration setup, which has a load cell and three‐axis stages. The location error is approximately 4 mm with respect to x‐axis and y‐axis directions. The force response of the fabricated touchpad is obtained at three points by loading and unloading of the probe. The touchpad can detect loads from 0 N to 2 N. The touchpad shows a hysteresis error rate of about 11% and uniformity error rate of about 3%.