Single-Layer Touch Substrate Breakpoint Grid Shadow Elimination
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Solution Overview
Problem
In single-layer touch substrates, the continuous metal grid of touch electrodes and leads results in visual shadows due to inconsistent patterns, affecting visibility and user experience.
Innovation Solution
A touch substrate design featuring a single-layer conductive layer with touch electrodes and leads forming grid-like structures that include breakpoints and connection lines of similar shapes, ensuring consistent patterns and eliminating shadows by matching the reflection properties of touch electrodes and leads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a continuous metal grid structure is used for touch electrodes and leads, then electrical conductivity and touch sensitivity are improved, but visual shadows appear due to inconsistent patterns between touch electrodes and leads
Solution Approach 1:
The continuous metal grid is segmented by introducing breakpoints in the touch electrode grid lines. These breakpoints divide the continuous grid into separate segments, allowing the reflection patterns of touch electrodes and leads to be aligned, thereby eliminating visual shadows while maintaining electrical conductivity through alternative current paths.
Solution Approach 2:
Different regions of the conductive layer are designed with different properties: touch electrode regions have grid lines with breakpoints for optimized reflection control, while lead regions maintain continuous connections for electrical conductivity. This local differentiation allows simultaneous optimization of visual appearance and electrical performance.
2Object-affected harmful factors
If breakpoints are introduced in the touch electrode grid lines, then visual shadows are eliminated through consistent pattern matching, but electrical conductivity may be affected
Solution Approach 1:
The breakpoints are strategically positioned in advance during the design stage to ensure that they do not interrupt critical current paths. By pre-planning the breakpoint locations at intersections or less critical areas, the design maintains electrical conductivity while achieving visual shadow elimination.
Solution Approach 2:
The reflection patterns of touch electrodes and leads are made consistent by copying the lead pattern characteristics to the touch electrode grid lines. This pattern matching ensures that both structures reflect light similarly, eliminating visual shadows while the breakpoint placement preserves electrical connectivity.
Data Source
AI summary
Provided are a touch substrate, a display panel, and a touch display device. The touch substrate, including: a base substrate; a conductive layer on the base substrate, the conductive layer being a single-layer structure, and the conductive layer including a plurality of touch electrodes and a plurality of leads electrically connected with the plurality of touch electrodes; where: a first grid-like structure is formed between adjacent leads, and a first disconnection line is arranged between the adjacent leads in the first grid-like structure; the touch electrodes have a second grid-like structure, and the second grid-like structure includes a plurality of breakpoints; and a connection line between the plurality of breakpoints has a substantially same shape as the first disconnection line.