Actuator
AssigneeSeiko Epson Corporation
InventorTetsuro MATSUMOTO
Life of this patent
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Abstract
An actuator includes an electrolyte membrane, first and second driving electrodes that are disposed on the opposite surfaces and that give a potential difference to the electrolyte membrane, a sensor that is formed on the electrolyte membrane and that detects a force acting on the electrolyte membrane, and a driving control circuit that supplies a drive voltage to the first and second driving electrodes on the basis of an instruction signal and a detection output of the sensor. The driving control circuit applies a PWM drive voltage with a duty ratio corresponding to a difference between the instruction signal and the detection output of the sensor across the first driving electrode and the second driving electrode.
Claims9
An actuator comprising:
- a layer that contains an electrolyte, and that is deformed with an application of an electric field thereto;
- and
- a first driving electrode and a second driving electrode that apply the electric field to the electrolyte,
- wherein the first driving electrode is supplied with a first drive voltage and the second driving electrode is supplied with a second drive voltage, and
- wherein at least one of the first drive voltage and the second drive voltage is PWM-modulated.
Dependencies are inferred from the claim text.