公开(公告)号：JPH10307661A

公开(公告)日：1998-11-17

申请号：JP6694598

申请日：1998-03-17

Applicant: IBM

Inventor： SELKER EDWIN JOSEPH ,  JONATHAN NOBLE BEZZ

IPC: G06F3/02 ,  H03K17/96

Abstract: PROBLEM TO BE SOLVED: To provide a key switch which feeds back tactile strength and timing that an operator can sense. SOLUTION: A piezoelectric key switch which provides a tactile response includes a bimorph piezoelectric element 10 which has its edge part fixed and a key pad 20 which is fitted to the bimorph piezoelectric element separately from the fixed edge part and the element bends with the key pad pressed, so that a voltage signal is generated between a grounded metal disk 15 and an electrode 17. The voltage signal from the electrode 17 is sent to a wire 18. In response to this voltage signal, a driving circuit provides a driving signal to cause the piezoelectric element to bend, thereby providing the key pad with upward tactile feedback.