| 摘要 |
PROBLEM TO BE SOLVED: To provide a stable flexible speaker which can be formed in any desired shape by using a flexible film-like sounding body and has no significant change in the frequency characteristics, even if it is inflected. SOLUTION: The flexible speaker consists of a base layer constituted of an elastic film formed of a polymer material such as elastomer and a pair of electrode layers formed by applying an elastic conductive polymer material on both faces of the base layer. A DC bias voltage is applied, between the electrode layers via terminal wires and an AC sound signal is superimposed on the DC bias voltage to change attracting force generated between the electrode layers. The base layer is compressed and elongated by the change in attracting force between the electrode layers, and thereby sounds are generated. The elastic materials, of which the base layer and the electrode layers are formed, increase the flexibility of the shape of the flexible speaker, and at the same time, minimize the change in the frequency characteristics due to inflection. COPYRIGHT: (C)2010,JPO&INPIT
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