HDMI Shield With Deflectable Fingers For EMI Protection
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Solution Overview
Problem
HDMI connectors are susceptible to electromagnetic interference (EMI) which can interfere with signal transmission, and existing shielding solutions are not easily adaptable or reusable.
Innovation Solution
A single sheet of metal with deflectable fingers is used to create a shield for HDMI connectors, allowing for easy installation and removal, providing a ground contact and reducing EMI interference while being reusable across different connectors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a flexible plastic film is used as shielding material, then the shielding can be trimmed to any desired shape or size, but the shielding cannot be easily removed or reused
Solution Approach 1:
The shielding is divided into multiple deflectable fingers that can independently move. This segmentation allows the shielding to be easily installed and removed by deflecting the fingers, while still maintaining the desired shape when in place. The modular finger structure enables reuse without damage.
Solution Approach 2:
The shielding transitions from a static structure to a dynamic one with deflectable fingers. These fingers can move between a constrained position (when installed) and a deflected position (when being installed or removed), enabling easy operation while maintaining structural integrity for reuse.
2Reliability
If a rigid shielding structure is used, then the shielding provides stable EMI protection, but the shielding cannot be easily installed or removed
Solution Approach 1:
The shielding incorporates deflectable fingers that can dynamically change state. When installed, the fingers are constrained to provide stable EMI protection. During installation or removal, the fingers can be deflected to move aside, enabling easy operation without compromising protection when in place.
Solution Approach 2:
The shielding uses thin metal fingers that are flexible enough to be deflected during installation/removal but rigid enough to provide effective EMI shielding when in place. This flexible structure maintains reliability while enabling ease of operation.
3Stability of the object's composition
If adhesive is used to attach shielding to the connector, then the shielding remains securely in place, but the shielding cannot be easily removed or reused
Solution Approach 1:
The shielding replaces permanent adhesive attachment with a dynamic mechanical interface using deflectable fingers. These fingers can be deflected to disengage from the connector, allowing easy removal and reuse. When engaged, the fingers provide sufficient constraint to maintain stable attachment without permanent bonding.
Solution Approach 2:
The deflectable fingers provide their own attachment mechanism through elastic deflection and recovery. No external adhesive is needed - the fingers themselves create the attachment through their ability to deflect and return to position, enabling both secure mounting and easy removal.
Data Source
AI summary
An electromagnetic shield comprises a single sheet of metal having outer and inner peripheries. The outer periphery forms a plurality of outer deflectable fingers extending outward from a bent edge of the outer periphery for contacting a surface of a faceplate. The plurality of outer deflectable fingers is deflectable to allow for installation and removal of the faceplate. The inner periphery has an opening for receiving an HDMI connector and forming a plurality of inner deflectable fingers extending inwardly from a bent edge of the inner periphery. The plurality of inner deflectable fingers is deflectable to allow for insertion and removal of the HDMI connector.