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Graphene composite acoustic diaphragm

  • US 9,900,698 B2
  • Filed: 06/30/2015
  • Issued: 02/20/2018
  • Est. Priority Date: 06/30/2015
  • Status: Active Grant
First Claim
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1. An audio device comprising:

  • a support structure;

    an acoustic element disposed within a recess of the support structure; and

    a diaphragm coupled to the support structure, the diaphragm comprising;

    a center portion comprising a base material;

    a flexible portion comprising the base material and surrounding the center portion and configured to flex in response to a movement of the center portion with respect to the support structure; and

    a graphene flake material molded into the base material, wherein a concentration of the graphene flake material is higher within the center portion than within the flexible portion such that an elastic modulus of the center portion is greater than an elastic modulus of the flexible portion.

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