Capacitance Generating Device in Metal Bezel for Antenna and Over-Current Protection
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Solution Overview
Problem
Electronic devices with metal exteriors face issues of degraded antenna performance and risk of electric shock due to over-currents, which existing capacitors on printed circuit boards struggle to mitigate effectively.
Innovation Solution
Incorporating a capacitance generating device with a first metal plate, a second metal plate spaced apart, and a dielectric member between them, which forms part of the metal bezel and is electrically connected to the substrate to enhance antenna performance and prevent over-current damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If metal material is used for external appearance, then luxuriousness and elegance are enhanced, but antenna radiating performance degrades and over-current damage risk increases
Solution Approach 1:
The patent merges the protective capacitor function with the metal bezel structure by forming a capacitor using the metal bezel as one electrode and an internal metal plate as the other electrode, with a dielectric layer between them. This integration allows the metal bezel to serve both aesthetic and protective functions simultaneously, preventing antenna performance degradation without compromising the luxurious appearance.
2Shape
If metal material is used for external appearance, then luxuriousness and elegance are enhanced, but risk of electric shock and product damage from over-current increases
Solution Approach 1:
The patent combines the capacitor function with the metal bezel structure to create an integrated protective mechanism. The capacitor formed between the metal bezel and internal metal plate provides over-current protection, preventing electric shock and product damage while maintaining the metal exterior's aesthetic appeal.
3Reliability
If separate capacitors are mounted on substrate, then antenna performance is protected, but device space is consumed and capacitor damage risk remains
Solution Approach 1:
The patent eliminates the need for separate capacitor components by integrating the capacitor function directly into the metal bezel structure. The metal bezel itself becomes one electrode of the capacitor, with the internal metal plate serving as the other electrode. This integration saves device space while maintaining protective functionality.
Solution Approach 2:
The metal bezel serves multiple functions simultaneously: it provides the external aesthetic appearance, acts as a structural component, and functions as an electrode in the protective capacitor. This multi-functionality eliminates the need for dedicated capacitor components and reduces overall device complexity.
4Reliability
If multiple capacitors are mounted on substrate, then over-current protection is improved, but device complexity and space consumption increase
Solution Approach 1:
The patent simplifies the device structure by merging the capacitor function into the metal bezel assembly. Instead of mounting multiple separate capacitors on the substrate, the capacitor is formed by the metal bezel and internal metal plate with a dielectric layer, reducing component count and assembly complexity.
Solution Approach 2:
The metal bezel structure is designed to serve multiple purposes: providing aesthetic appearance, structural support, and capacitive protection. This multi-functionality reduces the number of separate components needed, thereby simplifying the overall device structure and reducing complexity.
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 antenna performance, reduces the risk of electric shock, and saves space by integrating capacitive functionality into the metal bezel, effectively addressing the challenges of over-currents and antenna degradation.
Implementation Method 1
a dielectric member interposed between the first metal plate and the second metal plate
Implementation Method 2
at least a part of the bezel that forms the external appearance of the electronic device is implemented as a capacitor
Data Source
AI summary
An electronic device is provided. The electronic device includes a first metal plate of a metal bezel that forms the external appearance of the electronic device, a second metal plate that overlaps the first metal plate while being spaced apart from the first metal plate, a dielectric member interposed between the first metal plate and the second metal plate, and a substrate electrically connected to a contact terminal of the second metal plate to feed power. Other embodiments are possible.