Method and apparatus for an incidental use piezoelectric energy source with thin-film battery
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United States of America Patent
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Issued Date -
May 6, 2004
app pub date -
Nov 5, 2002
filing date -
Nov 5, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The manufacture and use of piezoelectric materials as thin-film battery charging devices that may be operated incidentally to the normal use of another device are taught. For example, a user pressing a button to achieve a desired operation may incidentally charge the battery of the device in use. The present invention also relates to an electric device that may be self-charging under normal use. The present invention may also provide for a battery charging system and/or method for battery charging, including one that is completely self-contained. A piezoelectric element may be used to convert the mechanical energy obtained from the depression of a button or other actuator into the proper electrical form for storage in a thin-film battery. Circuitry may be included to regulate the electrical energy to proper charging levels, including circuitry used to protect a thin-film battery from overcharge, or to prevent other damage to a battery.
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