| 20080317266 | Contact Structure of a Film-Type Audio-Speaker - The invention is a contact structure of a film-type audio-speaker of a structure appropriate for transmitting audio signal current to the entire audio-speaker surface without attenuating the strength of the signals while achieving enhanced durability. There is provided a contact structure for use in a film-type audio-speaker including a piezoelectric film unit having a piezoelectric film which is obtained by surface-treating a film and coating an electrically conductive polymer layer on the surface of the film, and one or more terminal portions which are electrically connected to a piezoelectric film unit, the contact structure of the film-type audio-speaker comprising: a metal electrically conductive layer coated around the circumference of the piezoelectric film unit, and having a relatively excellent electrical conductivity in comparison with the electrically conductive polymer layer, wherein the terminal portions are in close contact with the metal electrically conductive layer. | 12-25-2008 |
