Patent ID: 8872798

Claim:
An electronic device, comprising: a substrate having a top surface and a bottom surface which are co-planar, the substrate being capable of expanding linearly in any direction co-planar with the top surface and bottom surface, and also being capable of deflecting in a direction perpendicular to the to surface and bottom surface; sensor module mounted to the bottom surface, the sensor module comprising: at least one expansion detector operative to detect and collect expansion data representative of a linear expansion of the substrate, the linear expansion being independent of deflection; and at least one deflection detector operative to detect and collect deflection data that is representative of deflection, the deflection being independent of linear expansion; and a processing module operative to: receive expansion data and deflection data from the module; construct a first image based upon the collected expansion data; construct a second image based on the collected deflection data, the second image being different from the first image; and analyze the first image and second image to determine whether a user event has occurred.