Piezo speaker and installation method for laptop personal computer and other multimedia applications
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United States of America Patent
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Jun 10, 1997
Grant Date -
N/A
app pub date -
Jul 6, 1994
filing date -
Jul 6, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
This application outlines several applications of a piezoelectric materials invention to produce quality loudspeakers in applications where coil driven dynamic speakers are difficult or impossible to implement with an appreciable degree of sound quality. This invention includes a series of modifications to a laptop computer such as the IBM 750c. The modifications to the computer consist of placing piezoelectric patches behind the LCD and directly to the back wall of the laptop lid. Damping materials and stiffeners are also added to the back wall to reduce structural resonance. A system consisting of an audio amplifier and transformer is used to drive the piezo speaker.
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