Conductive Mesh Layout to Reduce Moiré in Display Antennas
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The integration of conductive elements such as antennas and sensors in image display devices leads to reduced transmittance and image quality due to moiré phenomena and interference, necessitating improved conductive mesh structures that consider optical and electrical properties.
Innovation Solution
A conductive mesh structure with a dielectric layer and conductive mesh layer featuring intersecting conductive and dummy lines, separated by separation and segmented portions, with specific width ratios to enhance optical transmittance and electrical insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conductive lines are made wider to improve electrical conductivity, then electrical properties improve, but optical transmittance decreases
Solution Approach 1:
The conductive mesh structure is divided into multiple patterns (first mesh pattern with conductive lines and second mesh pattern with dummy lines) separated by separation portions. This segmentation allows each pattern to be optimized independently - conductive lines maintain sufficient width for electrical conductivity while separation portions reduce overall conductive area to improve optical transmittance.
Solution Approach 2:
Different regions of the mesh structure have different properties: the first mesh pattern regions have wider conductive lines for electrical conductivity, while the separation portions have no conductive material to maximize light transmission. This local differentiation resolves the contradiction between electrical and optical requirements.
2Manufacturing precision
If mesh patterns are made more regular to simplify manufacturing, then manufacturing precision improves, but moiré phenomena increase
Solution Approach 1:
The second mesh pattern uses dummy lines with segmented portions that create an asymmetric, irregular structure compared to the regular first mesh pattern. This asymmetry disrupts the periodicity that causes moiré effects while the dummy lines still provide electromagnetic shielding and aesthetic uniformity.
Solution Approach 2:
The dummy lines with segmented portions are pre-designed to counteract potential moiré effects before the display device is assembled. By introducing this irregular pattern in advance, the design prevents moiré phenomena from occurring when the mesh overlaps with pixel arrangements.
3Reliability
If separation portions are made wider to improve electrical insulation, then electrical properties improve, but optical transmittance decreases
Solution Approach 1:
The width of separation portions is optimized to a specific parameter range that simultaneously satisfies electrical insulation requirements and optical transmittance requirements. By carefully controlling this dimensional parameter, both electrical and optical performance are improved without compromise.
Data Source
AI summary
A conductive mesh structure includes a dielectric layer, a first mesh pattern disposed on a top surface of the dielectric layer and including conductive lines that intersect each other, a second mesh pattern disposed on the top surface of the dielectric layer and including dummy lines that intersect each other and segmented portions that cut portions of each of the dummy lines, and separation portions separating the first mesh pattern and the second mesh pattern. A ratio of a width of each of the separation portions to a width of each of the segmented portions is in a range from 0.7 to 1.6.