Vibration device and driving device
AssigneeMurata Manufacturing Co., Ltd.
InventorKatsumi Fujimoto
Life of this patent
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Abstract
A vibration device is provided that includes a vibration element with a piezoelectric vibrator and a driving device that causes the vibration element to vibrate. The vibration element includes a translucent body and the piezoelectric vibrator is electrically coupled to the driving device. The driving device includes a first circuit that applies an electric signal to the piezoelectric vibrator to render the vibration element in a resonant state, a second circuit that applies an electric signal to the piezoelectric vibrator according to a feedback signal output from the piezoelectric vibrator, and a switch that switches coupling between the first circuit and the piezoelectric vibrator and coupling between the second circuit and the piezoelectric vibrator at a certain timing.
Claims20
A vibration device comprising:
- a vibration element that includes a vibrator and a translucent body;
- and
- a driving device that is electrically coupled to the vibrator and configured to cause the vibration element to vibrate, wherein the driving device including:
- a first circuit configured to apply an electric signal to the vibrator to render the vibration element in a resonant state,
- a second circuit configured to apply an electric signal to the vibrator based on a feedback signal output from the vibration element, and
- a switch configured to switch between the first circuit being coupled to the vibrator and the second circuit being coupled to the vibrator,
- wherein the vibrator of the vibration element includes a feedback electrode that is configured to generate the feedback signal.
A vibration device comprising:
- a vibration element that includes a vibrator and a translucent body;
- and
- a driving device configured to cause the vibration element to vibrate to move water droplets from the translucent body of the vibration element,
- wherein the driving device includes:
- a first circuit configured to drive the vibrator to render the vibration element in a resonant state,
- a second circuit configured to drive a vibration of the vibrator based on a feedback signal output from the vibration element, and
- a switch configured to switch between the first circuit being coupled to the vibrator and the second circuit being coupled to the vibrator,
- wherein the vibrator of the vibration element includes a feedback electrode that is configured to generate the feedback signal.
A driving device to cause a vibration element including a vibrator to vibrate, the driving device comprising:
- a first circuit configured to apply an electric signal to the vibrator so as to render the vibration element in a resonant state;
- a second circuit configured to apply an electric signal to the vibrator based on a feedback signal output from the vibration element;
- and
- a switch configured to switch between the first circuit being coupled to the vibrator and the second circuit being coupled to the vibrator at a defined timing;
- wherein the vibrator of the vibration element includes a feedback electrode that is configured to generate the feedback signal.
Dependencies are inferred from the claim text.