Magnetic Shield Plate for Speaker Field Containment
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Solution Overview
Problem
As electronic devices become thinner and their speakers more powerful, external magnetic fields generated by magnetic components interact adversely with adjacent articles, necessitating new methods to reduce magnetic field propagation.
Innovation Solution
Incorporating a plate of high permeability material within the electronic device, such as the rear panel or as an insert, to attenuate magnetic fields and improve speaker performance by redirecting magnetic fields within the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If speakers are made more powerful with stronger magnets, then speaker performance and efficiency are improved, but external magnetic field propagation increases causing interference with adjacent articles
Solution Approach 1:
The patent applies magnetic shielding material to redirect the harmful magnetic fields generated by powerful speaker magnets back into the speaker assembly, converting the harmful external radiation into beneficial internal magnetic flux that improves speaker efficiency while reducing external interference
Solution Approach 2:
The patent introduces magnetic shielding material as an intermediary component between the speaker magnets and the external environment, which mediates the magnetic field paths to contain fields within the device while maintaining speaker performance
2Length of moving object
If electronic devices are made thinner, then device portability and compactness are improved, but magnetic field containment becomes more difficult
Solution Approach 1:
The patent employs thin magnetic shielding films and plates that can be integrated into the slim device structure, providing effective magnetic field containment while maintaining the device's thin profile and portability
3Object-generated harmful factors
If magnetic shielding material is added to reduce external magnetic fields, then interference with magnetically susceptible materials is reduced, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent integrates magnetic shielding material into existing structural components such as the speaker assembly and device housing, allowing these components to serve both structural and magnetic shielding functions simultaneously, thereby reducing overall device complexity
Solution Approach 2:
The patent combines magnetic shielding functionality with existing speaker and housing structures, merging multiple functions into unified components to simplify the overall device architecture and manufacturing process
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
Effectively reduces external magnetic fields, minimizing interference with magnetically susceptible materials while enhancing speaker efficiency and performance by containing magnetic fields within the device.
Implementation Method 1
A plate of high permeability material is disposed within the electronic device and oriented such that it attenuates magnetic fields outside of the housing
Implementation Method 2
The plate of high permeability material may be configured to increase the magnetic fields in the speaker, improving its performance and/or efficiency
Data Source
AI summary
An electronic device having one or more magnets disposed within it (e.g., such as in a speaker) is equipped with a magnetic shield that attenuates magnetic fields propagating outside of the electronic device. The magnetic shield may be placed within the device such that it redirects the magnetic fields to contain them better within the one or more magnets, resulting in improved magnetic efficiency. In further embodiments, the magnetic shield may also function as a structural part of the electronic device and/or an electronic component with in the electronic device.