| 摘要 |
PROBLEM TO BE SOLVED: To provide a touch pad, capable of achieving slim size of a metal material, while using a piezoelectric film, stably and correctly recognizing various touch patterns of a long key, multi key, and slide key of a user, significantly improving security level, and using an electrostatic touch on a metal plate, without physical pressure.SOLUTION: A touch pad 100 comprises: a piezoelectric film 200 comprising plural touch keys K1, K2, K3, disposed on a bottom face of the touch pad 100 and emitting supersonic; and a control part for, analyzing displacement of the piezoelectric film 200 and a supersonic impedance reflected by the surface of the touch pad 100 and a touch object which is brought into contact with the surface, for confirming a touch of a user.SELECTED DRAWING: Figure 1 |
