Conductive Mesh Antenna Structure for Moiré-Free Display Integration
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Solution Overview
Problem
Conductive elements in image display devices, such as antennas and sensors, reduce transmittance and cause moiré phenomena, interfering with image quality and radiation properties.
Innovation Solution
A conductive mesh structure with intersecting conductive lines and controlled transmittance and interior angles to suppress moiré and enhance optical and electrical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conductor such as a metal layer is used in the antenna or sensor member, then the radiation properties and sensing sensitivity are improved, but the transmittance of the image display device is reduced and image quality is deteriorated
Solution Approach 1:
The continuous metal layer is segmented into a mesh structure with conductive lines arranged in a grid pattern. This segmentation reduces the continuous conductive area while maintaining radiation properties, thereby improving transmittance and reducing moiré effects.
Solution Approach 2:
The mesh structure uses locally optimized conductive line arrangements where the line width, spacing, and pattern density are adjusted in different regions to balance radiation performance and optical transmittance requirements.
2Ease of manufacture
If a regular pattern structure in the mesh structure and pixel array structure overlap each other, then the manufacturing and alignment are simplified, but a moiré phenomenon occurs to interfere with the image
Solution Approach 1:
The mesh structure employs asymmetric or irregular patterns instead of regular grids. The conductive lines are arranged with varying spacing and orientations that do not align with the pixel array, thereby preventing moiré effects while maintaining ease of manufacturing.
Solution Approach 2:
The mesh pattern is designed with multi-directional conductive lines at different orientations (e.g., diagonal, horizontal, vertical lines at various angles). This dimensional diversity in pattern orientation prevents regular overlap with the pixel array, eliminating moiré phenomena.
3Reliability
If the conductive lines are made thicker to improve radiation properties, then the antenna gain is improved, but the transmittance of the mesh structure is reduced
Solution Approach 1:
The mesh structure incorporates multiple layers or nested patterns of conductive lines where thinner lines are arranged in complementary patterns. This nesting allows the structure to achieve sufficient radiation properties through cumulative effect while maintaining lower individual line widths for better transmittance.
Solution Approach 2:
The conductive lines incorporate curved or non-linear paths instead of straight lines. This curvature increases the effective electrical length and radiation efficiency without increasing the physical footprint or line width, thereby maintaining antenna gain while preserving transmittance.
Data Source
AI summary
A conductive mesh structure according to an embodiment includes a dielectric layer, and a conductive mesh layer including first conductive lines and second conductive lines arranged on the dielectric layer and intersecting each other. The conductive mesh layer satisfies a predetermined range of transmittance and numerical values related to the interior angle of a mesh unit cell. An antenna element in which moiré is suppressed can be manufactured from the conductive mesh structure.