Metal Grid With Varied Patterns To Reduce Moiré Fringe
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Solution Overview
Problem
The existing touch screens with regular metal grids experience moiré fringe interference due to line overlapping with the black matrix in display modules, which degrades display quality, and reducing wire width leads to issues like breakage and poor antistatic capacity.
Innovation Solution
A metal grid with multiple repeat units featuring at least two different basic patterns, such as square, non-square parallelogram, and triangle patterns, arranged irregularly, which are pieced together to reduce line overlapping and improve moiré fringe, even with larger wire widths, while avoiding metal wire breakage and poor antistatic issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the line width of the metal wire is reduced to improve moiré fringe, then the moiré fringe phenomenon is reduced, but metal wire breakage and poor antistatic capacity occur
Solution Approach 1:
The patent applies asymmetry by using irregularly arranged basic patterns (squares, triangles, parallelograms) with different shapes and orientations in the metal grid. This asymmetric design breaks the regular periodic structure that causes moiré fringes when overlapping with the black matrix, while maintaining sufficient wire width for structural integrity and antistatic function
Solution Approach 2:
The patent implements local quality by varying the pattern types and arrangements in different regions of the metal grid. Different basic patterns (squares, triangles, parallelograms) are distributed throughout the grid structure, creating local variations that prevent uniform overlapping with the black matrix while maintaining overall grid functionality
2Ease of manufacture
If a regular metal grid structure is used, then the manufacturing is simple and resistance is low, but line overlapping with black matrix causes moiré fringe
Solution Approach 1:
The patent applies segmentation by dividing the metal grid into multiple discrete basic patterns (squares, triangles, parallelograms) that are arranged irregularly. This segmentation breaks the continuous regular grid structure into distinct pattern units, preventing uniform line overlapping with the black matrix while maintaining manufacturability through standardized pattern elements
Solution Approach 2:
The patent uses asymmetry by employing irregular arrangements of different basic patterns with varying orientations and shapes. This asymmetric design disrupts the periodic structure that causes moiré fringes, while the patterns remain manufacturable using standard photolithography processes
Data Source
AI summary
The embodiments of the invention provide a metal grid, a touch screen, a display device and a manufacture method of touch screen, and refer to display technology field. The invention can improve the phenomenon of moiré fringe when the line width of the metal wire is relatively large. The metal grid comprises multiple repeat units, the metal wires in the repeat unit form at least two different kinds of basic patterns, and the repeat unit is pieced together by one or more of the at least two different kinds of basic patterns.