Patent ID: 8120588

Claim:
Sensor assembly including a coordinate input surface and, under a region of the surface, at least a first switch assembly and a second switch assembly, each including at least a first conductive element and a second conductive element, the second conductive element being movable relative to the first conductive element; the first and second switch assemblies and their respective first and second conductive elements being arranged so that: when no force is exerted on the region of the surface or when a force smaller than a first threshold force is exerted thereon, the first and second conductive elements of the first switch assembly are not in contact with each other and the first and second conductive elements of the second switch assembly are not in contact with each other; when a force larger than the first threshold force and smaller than a second threshold force is exerted on the region, the first and second conductive elements of the first switch assembly are in contact with each other and the first and second conductive elements of the second switch assembly are not in contact with each other; and when a force larger than the second threshold force is exerted on the region, the first and second conductive elements of the first switch assembly are in contact with each other and the first and second conductive elements of the second switch assembly are in contact with each other.