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Audio Signal Processing

Loudspeaker-with-heat-radiating-hole-and-electrical-device-employing-the-same

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Loudspeaker with heat radiating hole and electrical device employing the same

Details

Inventors: Watanabe, Shoji;
Assignee: NEC Corporation (Tokyo, JP)
Primary Examiner: Le; Huyen
Assistant Examiner:
Attorney, Agent or Firm: Sughrue, Mion, Zinn, Macpeak & Seas, PLLC

A loudspeaker is superior in space saving ability for enabling down-sizing of a device, to which the loudspeaker is employed, and has frequency characteristics easily designed and adjusted. The loudspeaker includes a vibration plate formed with a plurality of heat radiating through openings, and a vibrating portion responsive to an input electrical signal and driving the vibration plate for generating an acoustic vibration.

DETAILED DESCRIPTION It is therefore an object of the present invention to provide a loudspeaker superior in space saving ability for enabling down-sizing of a device, to which the loudspeaker is employed, and an electronic device using the same.
Another object of the present invention is to provide a loudspeaker having frequency characteristics easily designed and adjusted.
According to the first aspect of the present invention, a loudspeaker comprising: a vibration plate formed with a plurality of heat radiating through openings; and a vibrating portion responsive to an input electrical signal and driving the vibration plate for generating an acoustic vibration.
In the preferred construction, geometry of a plurality of heat radiating holes is selected depending upon a desired frequency characteristics of the loudspeaker.
A physical property of a plurality of heat radiating holes may be selected for obtaining the selected geometry.
In the alternative, a distribution of a plurality of heat radiating holes may be selected for obtaining the selected geometry.
A size or shape of each individual heat radiating hole may be adjusting for obtaining the selected physical property of a plurality of heat radiating holes.
An interval between mutually adjacent heat radiating holes may be selected for obtaining the selected distribution of a plurality of heat radiating holes, or in the alternative, number of heat generating holes to be formed through the vibration plate may be selected for obtaining the selected distribution of a plurality of heat radiating holes.
According to second aspect of the present invention, an electric device comprises: a casing housing functional components therein; a built-in loudspeaker including: a vibration plate forming a part of wall of the casing, the vibration plate being formed with a plurality of heat radiating holes determining frequency characteristics of the loudspeaker and serving for radiating internal heat of the electric device; and a vibrating portion driving the vibration plate for generating an acoustic vibration

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