| 摘要 |
PROBLEM TO BE SOLVED: To provide a technology that can eliminate a variation in the intensity of vibration of an operation panel when the operation panel is pressed.SOLUTION: Piezoelectric elements 17a to 17f are bonded to the rear surface of a touch panel 12. A control unit 1 detects the voltage differences between maximum detection voltages of the piezoelectric elements 17a to 17f when the touch panel 12 is pressed, and controls to shift the timing to vibrate the piezoelectric elements 17a to 17f according to the detected voltage differences so that the vibrations of the piezoelectric elements 17a to 17f are aligned at the position where the touch panel 12 has been pressed. |
