Touch Sensing Unit With Differential Thickness for Touch Sensitivity
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Solution Overview
Problem
Existing touch sensing units in display devices suffer from sensitivity deviations and reduced overall touch sensitivity due to variations in the thickness and arrangement of connecting electrodes.
Innovation Solution
The touch sensing unit is designed with first and second connecting electrodes of different thicknesses to improve electrical connectivity and reduce sensitivity deviations, enhancing the overall touch sensitivity by optimizing the layout and arrangement of touch electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If uniform thickness connecting electrodes are used, then manufacturing is simpler, but touch sensitivity is reduced due to higher resistance
Solution Approach 1:
The patent applies local quality by differentiating the thickness of connecting electrodes based on their specific locations and functions. First connecting electrodes have a first thickness while second connecting electrodes have a second thickness, allowing each region to be optimized for its specific electrical connectivity requirements. This localized differentiation reduces resistance in critical paths while maintaining manufacturing feasibility.
Solution Approach 2:
The patent changes the physical parameter of thickness for connecting electrodes to optimize electrical performance. By varying the thickness parameter between different connecting electrode regions, the patent reduces overall resistance and improves touch sensitivity. This parameter change is implemented through selective deposition or etching processes that create different thickness profiles in different regions of the connecting electrode structure.
2Reliability
If thicker connecting electrodes are used, then electrical connectivity is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent segments the connecting electrode structure into multiple regions with different thickness requirements. First connecting electrodes and second connecting electrodes are treated as separate segments with distinct thickness specifications. This segmentation allows each segment to be optimized independently, reducing the overall manufacturing precision burden compared to requiring uniform thickness across the entire connecting electrode structure.
Solution Approach 2:
By assigning different thicknesses to different segments of the connecting electrode structure, the patent applies local quality principles. Each segment receives the thickness appropriate to its specific function and location, rather than uniformly thickening the entire structure. This approach improves electrical connectivity where needed while avoiding excessive thickness requirements that would demand extreme manufacturing precision.
3Reliability
If different thickness connecting electrodes are used, then resistance is reduced, but device complexity increases
Solution Approach 1:
The patent implements local quality by creating different thickness regions within the connecting electrode structure. First connecting electrodes have a first thickness optimized for their specific path, while second connecting electrodes have a second thickness optimized for their path. This localized differentiation reduces resistance in critical signal paths while maintaining manageable structural complexity through systematic organization of the different thickness regions.
Solution Approach 2:
The patent utilizes parameter changes by varying the thickness parameter across different regions of the connecting electrode structure. This parameter variation is implemented through controlled manufacturing processes that create distinct thickness profiles. The resulting structure achieves reduced resistance and improved touch sensitivity while maintaining device complexity at acceptable levels through systematic design of the parameter variations.
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
The improved design reduces resistance and sensitivity deviations, resulting in enhanced touch sensitivity and performance of the touch sensing unit.
Implementation Method 1
second connecting electrodes electrically connecting the second touch electrodes, in which a thickness of the second connecting electrodes is different from thicknesses of the first touch electrodes and the second touch electrodes
Data Source
AI summary
A display device including a substrate, a light emitting element, an inorganic layer on the light emitting element, an insulating layer on the inorganic layer and including a first surface facing the inorganic layer and a second surface opposite to the first surface, first touch electrodes disposed on the second surface of the insulating layer and arranged along a first direction, second touch electrodes disposed on the second surface of the insulating layer and arranged along a second direction, a first connecting electrode disposed on the second surface of the insulating layer and electrically connecting two adjacent first touch electrodes, and a second connecting electrode electrically connecting two adjacent second touch electrodes, in which the second connecting electrode is disposed on a layer different from the second touch electrodes, and a thickness of the second connecting electrode is less than thicknesses of the two adjacent second touch electrodes.