| 摘要 |
The present invention relates to a piezoelectric speaker capable of preventing partial vibrations by maintaining uniform vibrations on a piezoelectric layer or a sound diaphragm by including a partial vibration preventing film. The speaker includes the sound diaphragm, a pair of frames which are attached to the circumferences of the upper side and the lower side of the sound diaphragm, the piezoelectric layer which is attached to the upper side of the sound diaphragm and outputs a sound by converting the applied electric signal to the vibration, an amplitude control plate which is attached to the lower side of the sound diaphragm and is made of synthetic resin materials, and the partial vibration preventing film which is attached to the upper side of the sound diaphragm to cover the piezoelectric layer, has a metal thin film with a pattern shape on the bottom side thereof, and is made of the synthetic resin materials. |
