Sparse touch sensing for capacitive touch screens

Improved capacitive touch screen responsiveness can be achieved at the expense of the touch screen controller analog hardware complexity and power consumption. This paper proposes a compressive sensing based approach to exploit the sparsity of simultaneous touches (e.g., 10 or less per person) with...

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Published in2012 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) pp. 2545 - 2548
Main Authors Chenchi Luo, McClellan, J., Borkar, M., Redfern, A.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.03.2012
Subjects
Capacitance
capacitive touch screens
Charge transfer
Compressed sensing
compressive sensing
Sensors
Sparse matrices
Topology
Voltage measurement
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Summary:Improved capacitive touch screen responsiveness can be achieved at the expense of the touch screen controller analog hardware complexity and power consumption. This paper proposes a compressive sensing based approach to exploit the sparsity of simultaneous touches (e.g., 10 or less per person) with respect to the number of sensor nodes (e.g., 100s) to achieve similar levels of responsiveness with lower levels of analog complexity and power consumption. This is done by showing that the number of measurements required for touch detection is related to the number of touches rather than the number of nodes.
ISBN:1467300454
9781467300452
ISSN:1520-6149
2379-190X
DOI:10.1109/ICASSP.2012.6288435