Electronic device with speaker cavity cooling
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United States of America Patent
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-
Jan 2, 2018
Issued Date -
N/A
app pub date -
May 22, 2015
filing date -
Sep 30, 2014
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An electronic device may have a housing. The housing may enclose an interior cavity. A speaker may be mounted in an opening in the housing. The interior cavity may serve as a sealed back volume for the speaker during normal operation of the speaker. During normal operation, control circuitry in the interior cavity plays audio content through the speaker. When it is desired to cool the control circuitry and the speaker, the control circuitry supplies a subaudible signal to the speaker. Airflow regulators having one-way valves and valves that are controlled by the control circuitry are mounted in the housing. Movement of a diaphragm in the speaker when the subaudible speaker is applied causes the diaphragm to pump air through the airflow regulators, creating a cooling airflow through the interior cavity.
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