Granted Patent B2

US 12,656,871 · App. 18/690,612 · Granted Jun 16, 2026

Inventor: Fumiaki Nakao (Kawasaki, JP)

Assignee: KYOCERA Corporation

G06F3/016

Abstract

Claims (26)

1 . An electrical device comprising:

a vibrator that, when receiving an electrical signal, vibrates a vibration target; and

a controller that inputs a composite pulse, which is a combination of a first electrical pulse and a second electrical pulse, to the vibrator,

wherein the first electrical pulse is a signal that causes the vibration target to vibrate,

wherein pulse width of the first electrical pulse is a period of time from the input of the first electrical pulse to the vibrator until displacement of the vibration target becomes maximum,

wherein the second electrical pulse is a signal that offsets the vibration of the vibration target caused by the first electrical pulse,

wherein the composite pulse is configured as a single pulse, and

wherein the controller adjusts pulse width of the composite pulse such that a maximum value of a second wave of a vibration waveform of the vibration target achieves a preset ratio with respect to a maximum value of a first wave.

2 . The electrical device according to claim 1 , wherein the pulse width of the first electrical pulse is a period of time half as long as a natural period of a vibration system including the vibration target.

3 . The electrical device according to claim 1 , wherein polarity of the second electrical pulse is the same as polarity of the first electrical pulse.

4 . The electrical device according to claim 1 , wherein pulse width of the second electrical pulse is a period of time half as long as a natural period of a vibration system including the vibration target.

5 . The electrical device according to claim 1 , wherein pulse width of the composite pulse is a period of time equal to a natural period of a vibration system including the vibration target.

6 . The electrical device according to claim 1 , wherein the controller inputs, to the vibrator, a composite pulse that is obtained by superimposing a part of the first electrical pulse and a part of the second electrical pulse upon each other.

7 . The electrical device according to claim 6 , wherein pulse width of the composite pulse is smaller than a period of time equal to a natural period of a vibration system including the vibration target.

8 . The electrical device according to claim 1 , wherein the vibrator includes a piezoelectric element,

wherein the first electrical pulse is a first voltage pulse, and

wherein the second electrical pulse is a second voltage pulse.

9 . The electrical device according to claim 1 , wherein the first electrical pulse has a rectangular shape,

wherein the second electrical pulse has a rectangular shape.

10 . A method for controlling vibration, the method comprising:

inputting a composite pulse, which is a combination of a first electrical pulse and a second electrical pulse, to a vibrator that, when receiving an electrical signal, vibrates a vibration target; and

adjusting pulse width of the composite pulse such that a maximum value of a second wave of a vibration waveform of the vibration target achieves a preset ratio with respect to a maximum value of a first wave,

wherein the first electrical pulse is a signal that causes the vibration target to vibrate,

wherein pulse width of the first electrical pulse is a period of time from the input of the first electrical pulse to the vibrator until displacement of the vibration target becomes maximum

wherein the second electrical pulse is a signal that offsets the vibration of the vibration target caused by the first electrical pulse, and

wherein the composite pulse is configured as a single pulse.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (11)