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US 9,781,515 B2Granted
Loudspeaker diaphragm, and loudspeaker, electronic device and mobile device including the diaphragm
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsTomonori Shibuya, Yoshiyuki Takahashi, Yoshimichi Kajihara, Tetsushi Itano, Mitsukazu Kuze, Takayuki Dan
Life of this patent
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Abstract
A loudspeaker diaphragm includes a base layer and a coating layer. The base layer contains natural fibers. The coating layer is composed of bamboo cellulose nanofibers and is formed at least on the first side of the base layer. The coating layer has a thickness in the range of 3% to 15%, both inclusive of the sum of the thicknesses of the base layer and the coating layer.
Claims11
A loudspeaker diaphragm comprising:
- a base layer containing natural fibers;
- and
- a coating layer containing bamboo cellulose nanofibers and formed at least on a first side of the base layer,
- wherein the coating layer has a thickness in a range of 3% to 15%, both inclusive of a sum of thicknesses of the base layer and the coating layer, and
- the coating layer includes a first coating part, and a second coating part thicker than the first coating part.
2 more elements
Dependencies are inferred from the claim text.