Piezoelectric speaker
WO2026062966A1PCT designated stage Publication Date: 2026-03-26NITTO DENKO CORP
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Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2025-05-14
- Publication Date
- 2026-03-26
AI Technical Summary
Technical Problem
Existing piezoelectric speakers using piezoelectric actuators do not effectively produce sound with good low-frequency characteristics.
Method used
A piezoelectric speaker design incorporating a flexible piezoelectric actuator, a diaphragm, and an intervening layer with a driving coefficient of 1 [(kg·mm)/(GPa·m)] that vibrates the diaphragm to enhance low-frequency sound production.
Benefits of technology
The design achieves improved low-frequency sound quality by amplifying vibrations and extending the frequency range to lower frequencies, reducing odd-order mode vibrations, and facilitating easier fixation to a support.
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Smart Images
Figure JP2025017611_26032026_PF_FP_ABST
Abstract
A piezoelectric speaker (10) includes a bending-type piezoelectric actuator (35), a diaphragm (41), a fixing surface (17), and an interposing layer (42). The diaphragm (41) is vibrated by the bending-type piezoelectric actuator (35). The fixing surface (17) is a surface to be fixed to a support body (80). The interposing layer (42) is disposed between the diaphragm (41) and the fixing surface (17). The drive coefficient of the interposing layer (42) is 1 [(kg·mm) / (GPa·m3)] or more. The drive coefficient is a value obtained by dividing the product of the thickness of the interposing layer (42) and the density of the interposing layer (42) by the Young's modulus of the interposing layer (42).
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