TOUCH-SENSITIVE INTERFACE DEVICE AND METHOD
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United States of America Patent
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Issued Date -
Aug 20, 2009
app pub date -
Mar 27, 2009
filing date -
Feb 18, 2008
priority date (Note) -
Abandoned
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Abstract
A touch-sensitive interface device includes:—a touch-sensitive keypad including elements for generating a voltage as the effect of a mechanical deformation, and—a signal processing electronic interface adapted to detect pressing and/or releasing of a voltage generator elements and to go to standby after the pressing and/or the releasing of each voltage generator elements. The voltage generator elements preferably includes a piezoelectric element. In embodiments, the electronic interface includes at least one voltage comparator device, the generation of a parameterable threshold voltage to which the voltage comparator device compares the voltage at the terminals of a voltage generator element, and a card including a central processor unit and its power supply unit. The parameterable threshold voltage can be increased or decreased to detect positive and negative peaks of at least one voltage generator elements respectively caused by pressing or releasing at least one voltage generator elements.
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