Touch Panel Thin-Line Mesh Ink Blurring Control
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Solution Overview
Problem
In touch panels with conductive parts made of thin-line mesh, blurring of electrically conductive ink at intersections reduces visual quality due to the formation of large blurred regions.
Innovation Solution
Designing the thin-line mesh with acute and obtuse angular areas at intersections and using a doctor blade to fill electrically conductive ink into a printing plate with a groove pattern, where the squeezing direction passes through the acute angular area, reducing the size of the blurred region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If gravure printing or gravure offset printing is used to form thin-line mesh conductive parts, then the conductive pattern can be formed, but blurring of electrically conductive ink occurs at intersections reducing visual quality
Solution Approach 1:
The patent applies local quality by differentiating the treatment of different areas at intersections. The acute angular area is identified as the region where ink should be deposited, while the obtuse angular area is avoided. This localized approach ensures that ink is placed only where it will not blur, maintaining clarity at intersections while preserving the overall printing process.
Solution Approach 2:
The patent utilizes asymmetry by recognizing that intersections have non-uniform geometry with acute and obtuse angles. By asymmetrically directing the squeezing process to pass through only the acute angular area rather than treating all directions equally, the method prevents ink blurring while maintaining conductive functionality.
2Manufacturing precision
If the thin-line mesh is designed with conventional printing methods, then manufacturing is straightforward, but the blurred region at intersections is large affecting visual quality
Solution Approach 1:
The patent applies parameter changes by modifying the design parameters of the thin-line mesh at intersections. Specifically, the mesh is designed to form acute angular areas with specific angle ranges (30-60 degrees) rather than conventional symmetric intersections. This parameter optimization reduces the blurred region size while maintaining manufacturability through controlled design specifications.
3Manufacturing precision
If the doctor blade squeezing direction passes through the obtuse angular area, then ink filling is straightforward, but the blurred region becomes larger
Solution Approach 1:
The patent applies preliminary action by pre-designing the thin-line mesh with specific acute angular areas oriented in predetermined directions. This preliminary design allows the squeezing direction to be aligned with these pre-established acute angular areas, ensuring that ink is deposited in the optimal region without requiring complex real-time adjustments during the printing process.
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
Significantly reduces the size of the blurred region of electrically conductive ink at intersections, enhancing the visual quality of the touch panel by maintaining uniformity and transparency.
Implementation Method 1
a step of filling electrically conductive ink into a printing plate by a squeezing process using a doctor blade
Data Source
AI summary
A method for manufacturing a touch panel having a sensing area that includes a conductive part made up of thin-line mesh includes a step of designing the thin-line mesh, the thin-line mesh including a plurality of intersections, wherein the intersection forms therearound an acute angular area and an obtuse angular area, the acute angular area being defined between a pair of adjacently converging thin lines that forms an acute angle therebetween, the obtuse angular area being defined between a pair of adjacently converging thin lines that forms an obtuse angle therebetween, a step of filling electrically conductive ink into a printing plate by a squeezing process using a doctor blade, the printing plate having a groove pattern that conforms with the thin-line mesh, and a step of forming the conductive part by printing, in which the electrically conductive ink is transferred to a surface of a base member.