Flexible Electromagnetic Shielding for Compact Devices
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Solution Overview
Problem
Incorporating wireless circuitry and batteries in compact electronic devices is challenging due to space constraints and the presence of metal components, which can affect antenna performance and provide inadequate structural support for mechanical components like buttons.
Innovation Solution
The use of flexible electromagnetic shielding layers and multi-level shielding structures with conductive fences and sacrificial layers to accommodate components of varying heights, along with a protective battery sleeve design, helps in efficient space utilization and structural support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rigid electromagnetic shielding structures are used to shield circuitry, then electromagnetic shielding effectiveness is improved, but the structure cannot accommodate components of varying heights and flexibility is reduced
Solution Approach 1:
The patent employs a flexible electromagnetic shielding layer that can dynamically conform to components of varying heights. This flexible layer replaces rigid shielding structures, allowing the shielding to adapt to different component configurations while maintaining electromagnetic shielding effectiveness through its conductive material properties.
Solution Approach 2:
The patent utilizes a flexible electromagnetic shielding layer made from conductive materials such as metal foil or conductive fabric. This flexible film can be draped over and attached to conductive fences, accommodating components of different heights while providing continuous electromagnetic shielding coverage.
2Strength
If metal components are used in device construction, then structural strength is improved, but antenna performance is degraded due to electromagnetic interference
Solution Approach 1:
The patent segments the device structure into shielded and unshielded regions using conductive fences and flexible shielding layers. These segmented shielding structures strategically block electromagnetic paths between metal components and antenna elements, preventing interference while allowing metal components to maintain their structural strength functions.
Solution Approach 2:
The patent introduces electromagnetic shielding structures as intermediary elements between metal components and antenna elements. These shielding structures act as mediators that block harmful electromagnetic fields from reaching the antenna, thereby protecting antenna performance without compromising the structural integrity of metal components.
3Volume of moving object
If compact device design is implemented to reduce device size, then portability is improved, but structural support for mechanical components becomes inadequate
Solution Approach 1:
The patent designs ledges and mounting structures that serve multiple functions: they provide structural support for mechanical components like buttons and switches, while simultaneously serving as attachment surfaces for electromagnetic shielding structures. This multi-functionality allows compact design without sacrificing structural support capabilities.
4Adaptability or versatility
If space is optimized to accommodate more components, then device functionality is improved, but manufacturing complexity increases due to multi-level shielding structures
Solution Approach 1:
The flexible shielding layer can be manufactured as a single continuous piece that is then draped and attached to conductive fences, simplifying the manufacturing process compared to assembling multiple rigid shielding components. This dynamic flexibility allows the shielding to accommodate various component layouts without requiring complex custom-fitted pieces for each configuration.
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 enhances the performance of electronic devices by effectively shielding components, optimizing space usage, and providing robust structural support for mechanical components, thereby improving the overall functionality and compactness of the devices.
Implementation Method 1
The electromagnetic shielding structures may include a conductive fence that surrounds some of the electronic components. A flexible electromagnetic shielding layer may be used to cover the electronic components and the conductive fence.
Implementation Method 2
The electromagnetic shielding structures may include a conductive fence that surrounds some of the electronic components.
Implementation Method 3
The electromagnetic shielding layer may be welded to the fence using a sacrificial layer of metal that helps to protect the shielding layer from damage during welding operations.
Data Source
AI summary
An electronic device may include subassemblies such as battery structures, electromagnetic shielding structures, and button structures. The electromagnetic shielding structures may include a conductive fence and a flexible shielding layer that covers electronic components. The electromagnetic shielding structure may be formed with a recess that receives a protruding portion of a battery. The recess may be formed from a multi-level shielding structure that includes rigid and flexible portions. The button structures may be mounted to a ledge that is formed as an integral part of a device housing. An electronic device battery may be enclosed in a protective battery sleeve. The battery sleeve may include a center portion that encloses the battery and peripheral portions that are folded and coupled to the center portion by adhesive material interposed between opposing surfaces of the folded peripheral portions and the center portion of the battery sleeve.