Transparent Shielding Sheet With Overlapping Metal Pattern Layout
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Solution Overview
Problem
Conventional electromagnetic wave shielding sheets are opaque and suffer from low light transmittance due to metal mesh or grid patterns, leading to light scattering and reduced visibility.
Innovation Solution
A conductive metal pattern is formed on a transparent sheet with rows of identically shaped figures that partially overlap, enhancing electromagnetic wave shielding performance while maintaining transparency through the use of an anti-reflective coating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If metal mesh or grid patterns are used for electromagnetic wave shielding, then electromagnetic wave shielding performance is improved, but light transmittance deteriorates and light scattering occurs
Solution Approach 1:
The continuous metal layer is segmented into discrete conductive metal patterns (circles, ellipses, or polygons) arranged in rows and columns. This segmentation allows light to pass through the gaps between patterns while maintaining electromagnetic wave shielding through the distributed conductive elements.
Solution Approach 2:
The conductive metal patterns are strategically positioned and sized to provide localized electromagnetic wave shielding at specific areas while maintaining overall transparency. The patterns have different geometries (circular, elliptical, polygonal) optimized for their specific functions in the shielding network.
2Object-affected harmful factors
If conventional metal patterns are used, then electromagnetic wave shielding is achieved, but visibility and transparency are reduced due to light scattering
Solution Approach 1:
The invention transitions from two-dimensional mesh patterns to a more sophisticated arrangement where conductive patterns are distributed across the surface in rows and columns with partial overlap. This dimensional arrangement optimizes both shielding coverage and light transmission pathways.
Solution Approach 2:
The conductive metal patterns use asymmetric geometries (ellipses with different major and minor axes, irregular polygons) rather than uniform circles. This asymmetry helps reduce regular light scattering patterns while maintaining effective electromagnetic wave interference coverage.
3Object-affected harmful factors
If uniform metal coverage is applied, then electromagnetic wave shielding is improved, but light transmittance and visibility deteriorate
Solution Approach 1:
Instead of complete metal coverage, the invention uses partial coverage with conductive patterns that provide sufficient electromagnetic wave shielding through their distributed arrangement. The patterns are spaced and sized to provide adequate shielding performance while allowing significant light transmission through the uncovered areas.
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
The solution provides uniform electromagnetic wave shielding with improved reflection and absorption performance, ensuring high light transmittance and visibility by preventing surface reflection.
Implementation Method 1
a conductive metal pattern which includes a first row, a second row, . . . and an Nth row in which identically-shaped figures are disposed to partially overlap in rows
Implementation Method 2
the performance of shielding electromagnetic waves such as electromagnetic interference (EMI) is uniform over the entire area of the sheet so that electromagnetic wave reflection and absorption performance can be improved
Implementation Method 3
by applying an anti-reflective coating layer, light emitted to an electromagnetic wave shielding sheet is not reflected from a surface and is completely incident on and transmitted inside the sheet
Data Source
AI summary
The present invention relates to an electromagnetic wave shielding sheet satisfying two conditions of maintaining transparency (visibility) and improving electromagnetic wave shielding performance and a manufacturing method thereof. One feature of the present invention provides a transparent sheet through which light can be transmitted, and an electromagnetic wave shielding sheet including a conductive metal pattern defined by lines on the transparent sheet. The conductive metal pattern may include a first row, a second row, . . . , and an Nth row formed by arranging figures of the same shape in a row to partially overlap each other. In addition, the first row, the second row, . . . , and the Nth row may be arranged in columns to partially overlap each other.