Surface shape recognition sensor device

摘要

A detection element ( 1 A) having a detection electrode ( 11 A) connected to a surface shape detection unit ( 2 ) and a detection electrode ( 12 A) connected to a common potential, and a detection element ( 1 B) having a detection electrode ( 11 B) connected to the surface shape detection unit ( 2 ) and a detection electrode ( 12 B) connected to a biometric recognition unit ( 3 ) are arranged. The surface shape detection unit ( 2 ) outputs a signal representing the three-dimensional pattern of the surface shape corresponding to the contact portion to each detection element on the basis of individual capacitances obtained from the detection elements ( 1 A, 1 B). The biometric recognition unit ( 3 ) determines whether an object ( 9 ) is a living body, on the basis of a signal corresponding to the impedance of the object ( 9 ) connected between the detection electrode ( 12 B) of the detection element ( 1 B) and the detection electrode ( 12 A) of the detection element ( 1 A).