Electroconductive Mesh Film Layout to Prevent End-Line Collapse
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Solution Overview
Problem
In conventional electroconductive films, mesh portions with a smaller pitch at the end of the pattern can cause electroconductive lines to collapse during manufacturing, leading to increased visibility when incorporated in display devices.
Innovation Solution
The electroconductive film features a mesh-like pattern with distinct mesh portions at the ends, where the sum of the pitches of adjacent mesh portions is greater than the standard pitch, and these portions are shaped differently from the standard mesh portions, preventing line collapse and reducing visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the pitch of mesh portions at the end part is reduced to maintain uniformity, then the electroconductive lines may collapse or connect during manufacturing, but reducing the pitch increases the visibility of the electroconductive lines
Solution Approach 1:
The patent applies local quality by making the mesh portions at the end part dissimilar in shape to the standard mesh portions. Specifically, the end mesh portions have a configuration where the sum of adjacent pitches is greater than the standard pitch, creating a local structural difference that prevents line collapse while maintaining overall pattern uniformity.
Solution Approach 2:
The patent segments the mesh pattern into different types: standard mesh portions with uniform pitch and end mesh portions with modified pitch relationships. This segmentation allows the end portions to have special geometric properties (sum of pitches greater than standard pitch) that prevent collapse, while the majority of the pattern maintains standard uniformity.
2Manufacturing precision
If the pitch of mesh portions at the end part is reduced to maintain pattern uniformity, then manufacturing defects such as line collapse may occur, but this results in increased visibility of electroconductive lines in display devices
Solution Approach 1:
The patent applies preliminary anti-action by pre-configuring the end mesh portions with a specific geometric relationship (sum of adjacent pitches greater than standard pitch) that counteracts the tendency toward line collapse during manufacturing. This preventive structural design eliminates the need for post-manufacturing corrections and ensures consistent quality.
Solution Approach 2:
The patent changes the geometric parameters of end mesh portions specifically. Instead of maintaining uniform pitch throughout, the end portions have modified pitch relationships where the sum of adjacent pitches exceeds the standard pitch, creating a parameter variation that prevents manufacturing defects while maintaining overall pattern consistency.
3Ease of manufacture
If uniform mesh pitch is maintained throughout the electroconductive pattern, then the structure is simple to manufacture, but mesh portions at the end part may collapse or connect during manufacturing
Solution Approach 1:
The patent maintains ease of manufacture by keeping the majority of the mesh pattern uniform and simple, while applying a localized modification only at the end portions. This local quality approach ensures that most of the structure remains simple to manufacture while the critical end portions have enhanced reliability through their modified geometric configuration.
Solution Approach 2:
The patent segments the mesh pattern into standard portions (simple to manufacture with uniform pitch) and end portions (with modified pitch relationships for reliability). This segmentation allows the bulk of the structure to maintain manufacturing simplicity while the end segments provide the necessary structural reinforcement to prevent collapse.
Data Source
AI summary
A first electroconductive pattern includes a plurality of first electroconductive lines extending in a first direction along a main surface and a plurality of second electroconductive lines extending along the main surface in a second direction orthogonal to the first direction, each of a first pitch of the first mesh portion and a second pitch of the second mesh portion is smaller than a third pitch of the third mesh portion, a sum of the first pitch and the second pitch is greater than the third pitch, and in a case where a difference between the sum and the third pitch is assumed to be a fourth pitch, each of the first pitch and the second pitch is greater than the fourth pitch, and the first mesh portion and the second mesh portion are dissimilar in shape to the third mesh portion.