Multi-plate Micro-speaker Diaphragm for Acoustic Efficiency
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Solution Overview
Problem
Traditional micro-speakers with small diaphragm surface areas suffer from low electro-acoustic conversion efficiency and sound pressure levels due to limited volume displacement, which restricts their ability to effectively generate sound.
Innovation Solution
The design incorporates a housing with multiple diaphragm plates and insert plates, where flexible members allow for controlled movement of the diaphragm plates relative to the housing, increasing the effective surface area for sound generation by optimizing the interaction between the diaphragm and air through strategically placed apertures and driving devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the surface area of the diaphragm is increased to improve sound pressure level and electro-acoustic conversion efficiency, then the volume displacement and sound generation capability are improved, but the device size and complexity increase
Solution Approach 1:
The speaker divides the single diaphragm into multiple diaphragm plates (first diaphragm plate, second diaphragm plate, etc.) that can move independently or in coordination. Each diaphragm plate has its own driving device, allowing the system to achieve greater effective surface area and volume displacement without requiring a single large complex diaphragm structure
Solution Approach 2:
The patent introduces multiple diaphragm plates arranged in a stacked configuration with an insert plate positioned between them. This multi-layer arrangement increases the effective surface area in the vertical dimension rather than expanding horizontally, maintaining a compact footprint while improving electro-acoustic conversion efficiency
2Area of stationary object
If multiple diaphragm plates are introduced to increase effective surface area, then sound pressure level improves, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The speaker divides the single diaphragm into multiple diaphragm plates (first diaphragm plate, second diaphragm plate, etc.) that can move independently or in coordination. Each diaphragm plate has its own driving device, allowing the system to achieve greater effective surface area and volume displacement without requiring a single large complex diaphragm structure
Solution Approach 2:
The insert plate is positioned between the first diaphragm plate and the second diaphragm plate, creating a nested multi-layer structure. This nesting arrangement allows multiple diaphragm plates to be stacked within a compact space, increasing effective surface area while maintaining a manageable form factor for manufacturing and assembly
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 enhances the electroacoustic efficiency and sound pressure levels by increasing the air-load on the diaphragm plates, allowing for more effective sound radiation and improved sound generation capabilities.
Implementation Method 1
The insert plate driving device is configured to interact with the first driving device to move the first diaphragm plate relative to the housing and interact with the second driving device to move the second diaphragm plate relative to the housing
Data Source
AI summary
A speaker is provided. The speaker includes a housing. The speaker also includes a first diaphragm plate positioned within the housing and comprising a first driving device forming an exterior surface of the first diaphragm plate. The speaker further includes a second diaphragm plate positioned within the housing and comprising a second driving device forming an exterior surface of the second diaphragm plate. In addition, the speaker includes an insert plate fixedly attached to the housing and positioned between the first diaphragm plate and the second diaphragm plate. The insert plate includes an insert plate driving device positioned adjacent the first driving device and the second driving device. The insert plate driving device is configured to interact with the first driving device to move the first diaphragm plate relative to the housing and interact with the second driving device to move the second diaphragm plate relative to the housing.