Patent ID: 7946183

Claim:
A bending-detection apparatus which detects a bending of a device, comprising: a sheet-shaped substrate having flexibility; a detecting mechanism which detects a bending deformation of the substrate and which includes a sensor measuring an electric potential difference, and a plurality of detecting sections arranged on a surface of the substrate at a plurality of areas, respectively, each of the detecting sections having: a piezoelectric layer provided on a surface of the substrate; a plurality of first electrodes which are conducted with each other and each of which extends in an extending direction on a surface of the piezoelectric layer; and a plurality of second electrodes which are conducted with each other and each of which extends on the surface of the substrate in the extending direction, and which are arranged on the surface of the substrate alternately with the plurality of first electrodes, wherein the sensor measures an electric potential difference between a first electrode and a second electrode, among the plurality of first and second electrodes, of each of the detecting sections, to detect the bending deformation of the substrate based on the measured potential difference, and the extending direction in which the first and second electrodes extend is different among the plurality of detecting sections.