Method and a touch sensing device for implementing the method

摘要

The present invention relates to a method for determining an acoustic response attributed to a location of an impact, in particular a touch event, on a surface of an object including at least one transducer comprising the steps of: a) receiving an acoustic signal from at least one transducer, wherein the signal corresponds to a predetermined excitation (E) at at least one location on the surface; b) determining an acoustic response based on the acoustic signal received in step a); and c) determining the acoustic response attributed to at least one location on the surface different to the location of the predetermined excitation based on at least two different acoustic responses determined in step b).

主权项

1. A method for determining an acoustic response attributed to a location of an impact, in particular a touch event, on a surface of an object including at least one transducer comprising the steps of:
a) receiving an acoustic signal from the at least one transducer, wherein the signal corresponds to a predetermined excitation (E) at at least one location on the surface; b) determining an acoustic response based on the acoustic signal received in step a); c) determining the acoustic response attributed to at least one location on the surface different to the location of the predetermined excitation based on at least two different acoustic responses determined in step b); g) determining a first representative function based on the distance between an auxiliary location, which is positioned away from the location of the predetermined excitation and the locations on the surface different to the location of the predetermined excitation, and the location on the surface different to the location of the predetermined excitation; h) determining a second representative function based on the distance between the auxiliary location and the location of the predetermined excitation; i) computing a ratio between the first representative function determined in step g) and the second representative function determined in step h); j) repeating step g) for each location on the surface different to the location of the predetermined excitation and for each auxiliary location; and k) repeating step h) for each location of the predetermined excitation.