Device and method for locating a locally deforming contact on a deformable touch-sensitive surface of an object
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United States of America Patent
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Apr 14, 2015
Grant Date -
Aug 9, 2012
app pub date -
Jun 2, 2010
filing date -
Jul 29, 2009
priority date (Note) -
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Abstract
A device for locating a locally deforming contact on a deformable touch-sensitive surface of an object includes at least one transmitting transducer and at least one receiving transducer configured to respectively transmit and capture elastic mechanical waves propagating in the deformable touch-sensitive surface of the object. Further, an electronic central processing unit is connected to the transmitting and receiving transducers and is programmed to detect a frequency offset of at least one natural mode of a resonant vibration of the touch-sensitive surface due to presence of the locally deforming contact, the vibration being produced by the propagation of the waves transmitted in the touch-sensitive surface, and to locate the locally deforming contact by analyzing the frequency offset.
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