Touch Sensor Mesh Layout to Minimize Visible Boundaries
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Solution Overview
Problem
Electronic devices with touch sensing units face visibility issues due to reflection of external light, making the touch sensors discernible and affecting user experience.
Innovation Solution
The implementation of a touch sensing unit design featuring pattern parts with cut line parts and reference regions, where the difference between the number of cut line parts and the total sum of minimum spaced distances between pattern parts is carefully managed to minimize reflectivity differences, preventing the boundary from being visible under external light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous mesh lines are used in the touch sensing unit, then the sensing coverage is improved, but the boundary becomes visible due to reflection of external light
Solution Approach 1:
The continuous mesh lines are divided into multiple cut line parts with gaps between them. This segmentation reduces the continuous reflective surface area, thereby minimizing the visibility of the touch sensing unit boundary while maintaining sensing functionality through the distributed pattern of cut line parts
Solution Approach 2:
The cut line parts are strategically positioned and sized to create non-uniform gaps throughout the mesh pattern. This local variation in gap distribution optimizes light reflection characteristics in different regions, effectively reducing overall boundary visibility while preserving necessary sensing coverage
2Object-affected harmful factors
If the number of cut line parts is increased, then the reflectivity difference is reduced, but the manufacturing complexity increases
Solution Approach 1:
Instead of completely eliminating mesh lines or creating excessive cut line parts, the invention applies partial cutting action where only specific portions of the mesh lines are segmented. This partial approach achieves sufficient reduction in reflectivity difference while avoiding the manufacturing complexity that would result from complete segmentation
Solution Approach 2:
The invention optimizes parameters such as the number of cut line parts, their widths, and the spacing between them to achieve the desired balance. By carefully controlling these parameters, the reflectivity difference is reduced to an acceptable level while maintaining manufacturing feasibility
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
This design effectively reduces the visibility of the touch sensing unit boundaries under external light, enhancing user experience by maintaining sensor functionality while minimizing reflectivity differences.
Implementation Method 1
visibility issues due to reflection of external light, making the touch sensors discernible
Data Source
AI summary
An electronic device including: a first pattern part including first mesh lines in which a plurality of first cut line parts are defined; and a second pattern part spaced apart from the first pattern part in a first direction and including a plurality of second cut line parts in which a plurality of second cut line parts are defined. A first reference region is defined in the first pattern part; a second reference region having a same width and area as the first reference region in a second direction crossing the first direction is defined.