Method and apparatus for generating piezoelectric transducer excitation waveforms using a boost converter
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United States of America Patent
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Jun 14, 2016
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N/A
app pub date -
Sep 9, 2014
filing date -
Jan 7, 2011
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Abstract
Transducers formed as part of a touchscreen system emulate the motion of a pushbutton or other mechanical elements. A touchscreen system positions a transducer adjacent to an icon displayed on the touchscreen surface. When a user touches the icon, the transducer senses the touch and is then deformed in a pattern that emulates a mechanical motion, giving the user the sensation of touching a mechanical button. An excitation signal applied to the transducer is compared to a target excitation signal that, when applied to the transducer, causes the transducer to emulate the desired motion. When any differences between the two signals are detected, the excitation signal is adjusted so that the motion is corrected. The target excitation signal, or time and voltage segments defining it, are stored in memory and retrieved for comparison. The excitation signal is also selected to reduce any acoustic artifacts that can cause the transducer to generate audible clicks.
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Patent Owner(s)
- MAXIM INTEGRATED PRODUCTS, INC.
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- [Patents Count]
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Alini, Roberto | Dublin, US | 42 | 288 |
Coleman, Lee | Berkshire, GB | 5 | 122 |
Farooqui, Arshad Suhail | Westberkshire, GB | 5 | 22 |
Nickson, Paul | Newton, GB | 3 | 115 |
Umair, Muhammad | Santa Clara, US | 33 | 541 |
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