Customized Audio Antenna Module Thermoformed Membrane
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Solution Overview
Problem
Portable communication devices, such as mobile phones, face challenges in achieving high performance audio/antenna modules that are suitable for both high production numbers and limited component sizes, requiring a solution that maximizes loudness and antenna radiation patterns while being compatible with mass production.
Innovation Solution
A customized audio/antenna module is designed with a maximized membrane area for transducers, incorporating a standard prefabricated magnetic circuit and voice coil, and an antenna structure suitable for the 0.7-2.6 GHz range, with a membrane structure thermoformed from laminated polymer foil and an acoustic back-chamber for enhanced loudness and reduced interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the membrane area of the transducer is maximized to achieve high loudness, then the audio performance is improved, but the device size and complexity increase
Solution Approach 1:
The membrane structure is divided into a center portion and a surround portion that can be separately manufactured and then assembled. This segmentation allows each part to be optimized independently and simplifies the manufacturing process while achieving the desired large membrane area for high loudness
Solution Approach 2:
The voice coil is positioned within the air gap of the magnetic circuit, and the membrane is suspended around it, creating a nested arrangement where components are efficiently space-utilized. This nesting allows the membrane to achieve maximum area while maintaining compact overall device dimensions
2Reliability
If a custom-designed transducer system is implemented to achieve optimal performance, then the audio and antenna performance is improved, but the manufacturing cost and time increase
Solution Approach 1:
The audio transducer and antenna are integrated into a single module housing, combining two functions into one assembly. This merging allows both components to be manufactured and tested together, improving reliability while simplifying the mass production process through unified manufacturing procedures
Solution Approach 2:
The magnetic circuit and voice coil are pre-assembled into the module housing before the membrane is attached. This preliminary assembly allows these components to be prepared in advance using standardized procedures, facilitating mass production while maintaining optimal performance characteristics
3Power
If the membrane area is increased to maximize transducer yield, then the loudness is improved, but the available space in the module casing is reduced
Solution Approach 1:
The membrane is configured to extend in multiple dimensions within the available space, utilizing the vertical dimension by suspending it between the upper and lower walls of the housing. This dimensional optimization allows maximum membrane area to be achieved within the constrained volume of the module casing
Solution Approach 2:
A thin film membrane made of laminated polymer foil is used, which provides sufficient structural integrity while occupying minimal volume. This thin film approach allows the membrane to achieve large surface area without significantly increasing the overall volume of the module casing
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 solution results in a self-contained audio/antenna module that achieves high loudness and optimal antenna performance with reduced interference, meeting the demands of high production volumes and compact device sizes.
Implementation Method 1
a standard, prefabricated magnetic circuit adapted to displace the membrane structure of the at least one transducer in accordance with incoming audio drive signals
Implementation Method 2
a membrane structure implemented in accordance with design constrains provided by an audio/antenna module casing
Data Source
AI summary
The present invention relates to a method for assembling a self-contained audio/antenna module for a portable communication device, the method comprising the steps of incorporating, into the audio/antenna module, one or more transducers, said incorporation comprising, for at least one transducer, the steps of custom designing and implementing a membrane structure for the at least one transducer in accordance with design constrains provided by an audio/antenna module casing, and incorporating a standard, prefabricated magnetic circuit into the audio/antenna module, said magnetic circuit being adapted to displace the membrane structure of the at least one transducer in accordance with incoming audio drive signals. The invention further relates to an audio/antenna module manufactured according to the above-mentioned method.