| 摘要 |
The present invention relates to a piezoelectric speaker capable of smoothly reproducing a low frequency while increasing an output sound pressure by dually installing a sound diaphragm and minimizing a short of an electrode due to a vibration by forming the electrode with a circuit pattern. The piezoelectric speaker includes: a first sound diaphragm, one pair of pattern electrodes which are formed on the upper side of the first sound diaphragm with the circuit pattern and apply an electric signal, at least two connection terminals which are flatly attached on the upper side of the pattern electrode and are made of conductive materials, a piezoelectric layer which is attached on the upper side of the connection terminal and outputs a sound by converting the electric signal applied through the pattern electrode into the vibration, a second sound diaphragm which is attached on the upper side of the piezoelectric layer, and a frame which is attached to surround the first sound diaphragm and the second sound diaphragm. |
