| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a piezoelectric actuator drive unit supporting three functions of a tactile feedback function, a receiver function for outputting voice, and a speaker function for generating music or the like, and capable of optimizing power and drive amplifier characteristics in the piezoelectric actuator drive unit vibrating a piezoelectric actuator. <P>SOLUTION: A piezoelectric actuator drive unit 6 comprises a piezoelectric actuator drive amplifier A0 and a piezoelectric actuator drive unit power supply 100. In a signal (a control signal 1) which controls the supply voltage VPP and amplifier bias voltage of the piezoelectric actuator drive amplifier A0, and a signal (control signal 2) which controls the driving force of the piezoelectric actuator drive amplifier A0, combinations of high and low signal levels of the control signal 1 and the control signal 2 are associated with the respective functions of the tactile feedback function, the receiver function, and the speaker function. <P>COPYRIGHT: (C)2012,JPO&INPIT |
