Patent ID: 7434459

Claim:
A method comprising: sensing force information at a plurality of points on a substantially continuous surface, the force information related to an object on the surface; calculating a distribution of force exerted by the object, relative to the surface, based on the force information; and determining a location of the object on the surface, based on the distribution of force, wherein computing a center of force comprises: computing a total force applied to the surface by the object; computing the center of force of the object on the surface; determining a first component of the center of force by computing a first quotient of a first sum and a total force applied to the surface by the object, the first sum obtained by summing a first force applied at a first point and a second force applied at a second point; and determining a second component of the center of pressure, perpendicular to the first component, by computing a second quotient of a second sum and the total force, the second sum being obtained by summing the first force applied at the first point and a third force applied at a third point.