Piezoelectric Speaker Laminate With Interposed Layer
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Solution Overview
Problem
The existing methods for attaching piezoelectric speakers to supports are cumbersome and can restrict the emission of lower-frequency sounds, making them inconvenient and limited by the support material.
Innovation Solution
A piezoelectric speaker-forming laminate is designed with a porous body layer or resin layer interposed between the piezoelectric film and the pressure-sensitive adhesive, allowing for easier attachment by removing the release layer and sticking the adhesive face to the support, which enhances the ability to emit lower-frequency sounds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adhesive is applied to the piezoelectric speaker or support and then stuck together, then the piezoelectric speaker can be fixed to the support, but the procedure becomes troublesome and complex
Solution Approach 1:
The pressure-sensitive adhesive is pre-applied to the piezoelectric speaker diaphragm during manufacturing, and a release layer is temporarily attached to protect the adhesive surface. This preliminary preparation allows the adhesive to be ready for use without requiring separate application steps during installation, thus simplifying the attachment procedure while ensuring reliable fixing.
2Ease of operation
If the piezoelectric speaker is stuck directly to the support, then the attachment is simple, but lower-frequency sound emission is hindered
Solution Approach 1:
The pressure-sensitive adhesive layer acts as an intermediary between the piezoelectric speaker diaphragm and the support. This thin adhesive layer provides sufficient mechanical bonding to hold the speaker in place while being acoustically transparent enough to allow vibration transmission for lower-frequency sound emission, thus resolving the conflict between attachment ease and sound emission quality.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration simplifies the attachment process and prevents support materials from hindering lower-frequency sound emission, resulting in a more convenient and versatile piezoelectric speaker with improved sound emission characteristics.
Implementation Method 1
a pressure-sensitive adhesive layer 51, and a pressure-sensitive adhesive face 17 formed of a surface (principal surface) of the pressure-sensitive adhesive layer 51
Implementation Method 2
a piezoelectric speaker employing a piezoelectric film
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
A piezoelectric speaker-forming laminate (10) includes: a piezoelectric film (35); a pressure-sensitive adhesive face (17); an interposed layer (40) being a porous body layer and/or a resin layer disposed between the piezoelectric film (35) and the pressure-sensitive adhesive face (17); and a release layer (20) joined to the pressure-sensitive adhesive face (17). The pressure-sensitive adhesive face (17) is disposed in such a manner that at least a portion of the piezoelectric film (35) overlaps the pressure-sensitive adhesive face (17) when the piezoelectric film (35) is viewed in plan. The piezoelectric film (35) and the interposed layer (40) are allowed to be fixed to a support (80) as a piezoelectric speaker or a portion of a piezoelectric speaker by sticking the pressure-sensitive adhesive face (17) from which the release layer (20) has been removed to the support (80).