Metal Mesh Structure Right-Angle Node Design
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Solution Overview
Problem
Current metal mesh structures for touch electrodes in display devices have excessively large node areas due to the photolithography and etching processes, which affect the display performance by being visible to users.
Innovation Solution
The metal mesh structure is designed with first and second wires intersecting at nodes, where the included angle between the first wire and the second wire is a right angle, minimizing the node area and reducing the impact on display effect by adjusting the second included angle to 90 degrees through a bending design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If photolithography and etching processes are used to form metal mesh structure, then the metal mesh structure can be manufactured, but the node area becomes excessively large affecting display performance
Solution Approach 1:
The patent changes the geometric parameters of the wire structure by introducing bending portions that create right angles at nodes. This parameter change reduces the node area from what would be produced by conventional straight wire intersections, while still being manufacturable through standard photolithography and etching processes.
Solution Approach 2:
The patent applies curvature by introducing bending portions in the wires that form right angles at intersection nodes. These curved/bent wire segments replace straight line intersections, reducing the effective node area and improving display performance while maintaining structural integrity.
2Area of stationary object
If the included angle between first wire and second wire at node is made a right angle, then the node area is reduced, but the wire structure becomes more complex
Solution Approach 1:
The patent segments each wire into multiple portions (first portion, second portion, and bending portion) with distinct functions. This segmentation allows the bending portion to specifically address the node area reduction requirement while the other portions maintain the overall wire structure and connectivity, managing complexity through functional division.
Data Source
AI summary
A metal mesh structure includes at least one first wire extending along a first direction and at least one second wire extending along a second direction different from the first direction. The at least one first wire includes a first portion, a second portion and a first bending portion connected between the first portion and the second portion. The first bending portion crosses the at least one second wire to form a node. An extending line of the first portion along the first direction passes through the node and is overlapped with the second portion. A first included angle is included between the first direction and the second direction, and a second included angle is included between the first bending portion and the at least one second wire, wherein the first included angle is different from the second included angle, and the second included angle is 90 degrees.