Experimental study on reactive switch by using piezoelectric devices

The keyboard switch is an important for today's advanced systems. This paper proposes a new type of emulated reactive keyboard switch by using piezoelectric devices. The proposed reactive switch consists of two elements of piezoelectric devices that sensed and actuated by DSP micro controller. We investigate how each reaction force of switches effects to the touch feeling via sensory test. According to results of feeling test, we develop an actual reactive switch for demonstrating reaction force. Validity of proposed reactive switch is verified by actual experimental tests.