Piezoelectric Speaker Vibration Isolation for Compact Devices
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Solution Overview
Problem
The increasing miniaturization of electronic devices has created a challenge in accommodating traditional voice coil speakers, which are large and complex, leaving limited space for additional components.
Innovation Solution
The integration of piezoelectric speakers, which are thinner and more compact, along with a vibration isolator to enable independent vibration and a watertight seal, allowing for smaller device designs and improved sound quality through multiple speakers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If traditional voice coil speakers are used, then sound quality can be maintained, but the device size increases and space for additional components is reduced
Solution Approach 1:
The patent replaces the traditional voice coil electromagnetic mechanism with a piezoelectric mechanism. The piezoelectric speaker uses piezoelectric materials that convert electrical signals directly into mechanical vibrations, eliminating the need for voice coils, magnets, and complex electromagnetic assemblies, thereby significantly reducing device volume and complexity
Solution Approach 2:
The patent changes the fundamental operating parameters of the speaker system by transitioning from electromagnetic actuation to piezoelectric actuation. This parameter change enables a compact form factor while maintaining speaker functionality, as piezoelectric materials can achieve comparable vibration amplitudes with much smaller physical dimensions
2Volume of moving object
If piezoelectric speakers are used to reduce device size, then device volume decreases, but the speaker diaphragm may vibrate with the housing reducing sound quality
Solution Approach 1:
The patent introduces a vibration isolator as an intermediary element between the piezoelectric speaker diaphragm and the device housing. This isolator prevents direct mechanical coupling, allowing the diaphragm to vibrate freely in response to audio signals without being constrained or damped by the housing structure, thereby maintaining sound quality in the compact design
Solution Approach 2:
The patent segments the speaker assembly from the housing by introducing the vibration isolator, creating independent vibration zones. This segmentation allows the diaphragm to operate independently from the housing, preventing unwanted vibrations and maintaining acoustic performance
3Stability of the object's composition
If the speaker diaphragm is made visible, then the housing structure is compromised, but aesthetic appearance is reduced
Solution Approach 1:
The patent applies color matching between the speaker diaphragm and the housing exterior surface. By matching the color and visual properties of the diaphragm to the housing, the speaker becomes visually imperceptible, creating an aesthetically pleasing appearance while maintaining the housing's structural integrity and continuous surface
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 solution enables the creation of smaller electronic devices with additional features while maintaining or improving sound quality, and provides an aesthetically appealing design by making the speaker diaphragm nearly imperceptible from the housing.
Implementation Method 1
A piezoelectric speaker according to embodiments of the disclosure can be relatively thin compared to traditional voice coil speakers
Implementation Method 2
A vibration isolator is coupled between the piezoelectric speaker diaphragm and the housing to enable the piezoelectric speaker diaphragm to vibrate independently from the housing
Data Source
AI summary
An electronic device has an exterior housing with a piezoelectric speaker disposed in an opening formed within the housing. The piezoelectric speaker includes a speaker diaphragm that is secured within the opening with a vibration isolator. The vibration isolator allows the diaphragm to vibrate independently from the housing.