Piezoelectric user interface arrangement, and method for driving piezoelectric elements in a user interface arrangement
AssigneeAito BV
InventorsDavide La Croce, Turo Hermanni Keski-Jaskari
Life of this patent
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Abstract
Piezoelectric user interface arrangement comprises a voltage converter for controllably generating voltage waveforms driving one or more piezoelectric elements. The voltage converter has a control input. A controller is coupled to said control input to control an output voltage of said voltage converter. The controller has one or more scaling inputs. The controller forms said control signals to make said output voltage follow a target waveform as a function of time. The controller is configured to scale said target waveform on the basis of scaling information received through said one or more scaling inputs.
Claims10
A piezoelectric user interface system, comprising:
- a voltage converter configured to controllably generate voltage waveforms for driving one or more piezoelectric elements, wherein the voltage converter has at least one control input;
- and
- a controller coupled to the at least one control input and configured to control an output voltage of the voltage converter by applying control signals to the at least one control input, wherein the controller has one or more scaling inputs;
- wherein the controller is configured to;
- form the control signals to make the output voltage follow an original target waveform as a function of time;
- determine that the original target waveform cannot be followed;
- and
- in response to determining that the original target waveform cannot be followed, scale the original target waveform based on scaling information received through the one or more scaling inputs so as to allow the output voltage to deviate from the original target waveform and follow the scaled target waveform.
A method for operating a piezoelectric user interface system, comprising:
- controllably generating, by a voltage converter of the piezoelectric user interface system, voltage waveforms for driving one or more piezoelectric elements, wherein the voltage converter has at least one control input;
- and
- controlling, by a controller of the piezoelectric user interface system coupled to the at least one control input, an output voltage of the voltage converter by applying control signals to the at least one control input, wherein the controller has one or more scaling inputs;
- wherein controlling the output signal comprises:
- forming, by the controller, the control signals to make the output voltage follow an original target waveform as a function of time;
- determining, by the controller, that the original target waveform cannot be followed;
- and
- in response to determining that the original target waveform cannot be followed, scaling, by the controller, the original target waveform based on scaling information received through the one or more scaling inputs so as to allow the output voltage to deviate from the original target waveform and follow the scaled target waveform.
Dependencies are inferred from the claim text.