Micro Speaker Active Region Using Hydrophobic MOP Adsorbent
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Solution Overview
Problem
Conventional adsorbent materials used in micro speakers, such as zeolites and carbon-based materials, face issues like hydrophilicity, electrical conductivity, and interference with electronic circuitry, leading to reduced acoustic performance and reliability in compact devices.
Innovation Solution
The use of a self-supporting monolith-like element with a porous reticulated structure made from microporous organic polymer (MOP) material, which is naturally hydrophobic and non-conductive, enhancing acoustic performance while minimizing the risk of material leakage and interference with electronic components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If zeolite based materials are used as adsorbent, then acoustic compliance is improved, but hydrophilicity causes performance to diminish when exposed to moisture
Solution Approach 1:
The patent combines microporous organic polymer (MOP) material with hydrophobic characteristics to create a composite adsorbent that maintains acoustic compliance while resisting moisture. This composite approach integrates the porous structure needed for acoustic performance with the hydrophobic properties that prevent moisture-related degradation.
Solution Approach 2:
The invention changes the material parameter from hydrophilic (zeolite) to hydrophobic (MOP material), fundamentally altering the chemical property of the adsorbent to prevent moisture absorption while maintaining the necessary acoustic compliance for speaker performance.
2Reliability
If carbon-based materials are used as adsorbent, then acoustic compliance is improved, but electrical conductivity causes short circuits and interferes with electronic circuitry
Solution Approach 1:
The patent employs MOP material that combines the desirable acoustic properties of carbon-based adsorbents with the electrical insulation properties of organic polymers, creating a composite that provides acoustic compliance without electrical conductivity.
Solution Approach 2:
The MOP material serves as a non-conductive alternative that eliminates the need for additional insulating barriers, effectively replacing the dual-function requirement of acoustic compliance and electrical isolation with a single material solution.
3Speed
If small grain size adsorbent material is used, then adsorption/desorption frequency response is improved, but material packs densely causing micropores to become inaccessible
Solution Approach 1:
The patent utilizes MOP material with inherently stable microporous structure that maintains pore accessibility even at small grain sizes. The unique porous architecture of MOP prevents the densification issue that plagues conventional materials, allowing both high-frequency response and micropore accessibility to be achieved simultaneously.
4Stability of the object's composition
If adsorbent material is bound into a solid block, then material stability is improved, but micropores are masked causing loss of performance
Solution Approach 1:
The MOP material is processed into a monolithic form that maintains its microporous structure throughout the bulk material. The processing method preserves pore accessibility while achieving the mechanical stability of a solid block, eliminating the trade-off between stability and performance.
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
The MOP-based adsorbent material significantly improves low-frequency acoustic response and reduces the risk of moisture damage, providing a stable and effective solution for compact speaker designs without compromising electronic functionality.
Implementation Method 1
an active region that comprises an adsorbent element in the form of a self-supporting monolith-like element with a porous reticulated structure, wherein the adsorbent element includes adsorbent material which comprises microporous organic polymer (MOP) material
Implementation Method 2
the adsorbent element includes adsorbent material which comprises microporous organic polymer (MOP) material... significantly improves low-frequency acoustic response
Data Source
AI summary
The present invention relates to a method and apparatus for providing and/or receiving audible sound. In particular, the invention relates to apparatus, such as a micro speaker, which includes an active region which comprises an adsorbent element in the form of a self-supporting monolith-like element with a porous reticulated structure. The adsorbent element includes adsorbent material which comprises microporous organic polymer (MOP) material. The apparatus of the present invention is suitable for use in an electronic device, for example a mobile or portable electronic device, to provide improved audible sound.