Electrical device and method for controlling vibration
AssigneeKYOCERA Corporation
InventorFumiaki Nakao
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Abstract
An electrical device includes a vibrator and a controller. When receiving an electrical signal, the vibrator vibrates a vibration target. The controller inputs a first electrical pulse to the vibrator. 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. After inputting the first electrical pulse, the controller inputs a second electrical pulse to the vibrator in such a way as to offset the vibration of the vibration target.
Claims10
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.
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.
Dependencies are inferred from the claim text.