Display-Integrated Antenna Layout for NFC Through Conductive Shields
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Solution Overview
Problem
The performance of communications interfaces, such as NFC, in computing devices is often impeded by the conductive components of the display, particularly the conductive shield, which can interfere with antenna signals and prevent effective short-range communication through the display layer.
Innovation Solution
The antenna is positioned between the conductive shield and the display layer, allowing short-range communication to occur through the display layer by placing it between the shield and the outer layer, and using a conductive shield with apertures to mitigate signal attenuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the antenna is mounted within the display assembly between the conductive shield and the light emitter, then wireless communication performance is improved, but the device structure becomes more complex
Solution Approach 1:
The antenna is integrated into the display assembly by mounting it on the conductive shield, which is already part of the display structure. This merging approach allows the antenna to utilize the existing display assembly framework, improving wireless communication performance while avoiding the need for a completely separate antenna mounting structure.
Solution Approach 2:
The antenna is positioned in a specific spatial dimension within the display assembly, mounted on the conductive shield facing toward the light emitter. This dimensional placement optimizes the antenna's orientation for wireless signal transmission through the display, improving communication performance without adding external components.
2Reliability
If the antenna is positioned close to the conductive shield, then interference from the conductive shield is reduced, but the antenna mounting space becomes more constrained
Solution Approach 1:
The conductive shield is designed with specific local properties where the antenna is mounted, creating an optimized interface between the shield and antenna. This localized design allows the antenna to be positioned close to the shield for reduced interference while maintaining adequate mounting space through careful design of the contact area and surrounding structure.
Solution Approach 2:
The antenna mounting structure incorporates flexible or adjustable elements that allow the antenna to be positioned at optimal distances from the conductive shield. This dynamic adjustment capability enables the system to balance interference reduction with space constraints, optimizing NFC performance within the available volume.
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 enables effective short-range communication through the display layer while protecting internal components from electrostatic discharge and electromagnetic interference, enhancing antenna performance and maintaining display integrity.
Implementation Method 1
an antenna mounted between the conductive shield and the light emitter, the antenna configured for wireless communication through the outer layer
Implementation Method 2
a conductive shield disposed within the housing... minimizing interference from the conductive shield
Data Source
AI summary
A computing device includes: a housing; a display assembly supported by the housing, the display assembly including: an outer layer disposed at an exterior of the housing; a conductive shield disposed within the housing; a light emitter and a display layer disposed between the outer layer and the conductive shield; and an antenna mounted between the conductive shield and the light emitter, the antenna configured for wireless communication through the outer layer.