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US-2015372681-A1 · Dec 24, 2015 · US
Method for controlling a piezoelectric device having a piezoelectric element mounted on a substrate
US9685601B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9685601-B2 |
| Application number | US-201414888350-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 23, 2014 |
| Priority date | Apr 30, 2013 |
| Publication date | Jun 20, 2017 |
| Grant date | Jun 20, 2017 |
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Abstract
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A method for controlling a piezoelectric device including a piezoelectric element attached to a substrate, with the substrate and the piezoelectric element being made of materials having different coefficients of thermal expansion includes the step of subjecting the piezoelectric element to a predetermined electric voltage in order to cause a predetermined set deformation of the piezoelectric element. The predetermined electric voltage comprises a compensation portion determined according to ambient temperature to cancel a stress generated on the piezoelectric element due to a differential thermal expansion between the piezoelectric element and the substrate.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for controlling a piezoelectric device comprising a piezoelectric element fixed on a substrate, with the substrate and the piezoelectric element being made of materials having different coefficients of thermal expansion, with the method comprising the step of subjecting the piezoelectric element to a predetermined electric voltage to cause a predetermined set deformation of the piezoelectric element, wherein the predetermined electric voltage comprises a compensation portion determined according to ambient temperature to cancel a stress generated on the piezoelectric element due to a differential thermal expansion between the piezoelectric element and the substrate. 2. The method according to claim 1 , wherein the ambient temperature is periodically measured and the compensation portion is periodically determined. 3. The method according to claim 1 , wherein the compensation portion is determined using a table relating ambient temperature values with compensation portion values. 4. A piezoelectric device comprising a piezoelectric element fixed on a substrate, with the substrate and the piezoelectric element being made of materials having different coefficients of thermal expansion, with the device comprising a control unit which is connected to an energizing circuit of the piezoelectric element and which is so arranged as to implement the method according to claim 1 .
Assignees
Inventors
Classifications
- H03L1/026Primary
by using a memory for digitally storing correction values (H03L1/025 takes precedence) · CPC title
Electricity · mapped topic
- H01L41/042Primary
Electricity · mapped topic
Electricity · mapped topic
Piezoelectric or electrostrictive active materials · CPC title
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- What does patent US9685601B2 cover?
- A method for controlling a piezoelectric device including a piezoelectric element attached to a substrate, with the substrate and the piezoelectric element being made of materials having different coefficients of thermal expansion includes the step of subjecting the piezoelectric element to a predetermined electric voltage in order to cause a predetermined set deformation of the piezoelectric e…
- Who is the assignee on this patent?
- Safran Electronics & Defense
- What technology area does this patent fall under?
- Primary CPC classification H03L1/026. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jun 20 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).