Touch Electrode Layout With Variable Connector Thickness
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Solution Overview
Problem
Current touch sensing units in display devices face challenges in achieving optimal touch sensitivity due to variations in electrode thickness and arrangement, leading to sensitivity deviations and reduced overall touch sensitivity.
Innovation Solution
The touch sensing unit incorporates first and second touch electrodes arranged along long and short sides of a touch sensing area, with first and second connecting electrodes of different thicknesses, where the second connecting electrodes are thinner than the first, to reduce resistance and improve sensitivity by minimizing sensitivity deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If uniform thickness electrodes are used, then manufacturing is simplified, but touch sensitivity is reduced due to resistance variations
Solution Approach 1:
The patent applies local quality by varying the thickness of connecting electrodes based on their specific location and function. First connecting electrodes have a first thickness while second connecting electrodes have a second thickness different from the first. This allows each electrode to be optimized for its local requirements - thicker electrodes where higher conductivity is needed, thinner electrodes where lower profile is beneficial - thereby improving overall touch sensitivity while maintaining manufacturing feasibility through a systematic thickness variation approach.
2Reliability
If thicker connecting electrodes are used, then electrical connection is improved, but sensitivity deviations increase
Solution Approach 1:
The patent implements local quality by assigning different thicknesses to different connecting electrodes based on their functional requirements. First connecting electrodes have a first thickness optimized for their connection needs, while second connecting electrodes have a second thickness optimized for their respective needs. This localized optimization ensures that each electrode achieves the appropriate balance between electrical connection quality and sensitivity deviation minimization, preventing uniform thickness from causing either excessive resistance or sensitivity variations.
Solution Approach 2:
The patent applies parameter changes by varying the thickness parameter of connecting electrodes. Instead of using a uniform thickness value, the patent specifies that first connecting electrodes have a first thickness and second connecting electrodes have a second thickness different from the first. This parameter variation allows optimization of electrical connection quality in different regions while controlling sensitivity deviations, directly addressing the contradiction between connection quality and sensitivity uniformity.
3Measurement precision
If thinner connecting electrodes are used, then sensitivity deviations are reduced, but electrical resistance increases
Solution Approach 1:
The patent applies local quality by assigning different thicknesses to different connecting electrodes based on their specific functional requirements. First connecting electrodes have a first thickness that balances sensitivity uniformity and electrical connection, while second connecting electrodes have a second thickness optimized for their respective needs. This ensures that thinner electrodes are used only where sensitivity uniformity is critical, while thicker electrodes are used where electrical connection quality is paramount.
Solution Approach 2:
The patent implements parameter changes by varying the thickness parameter of connecting electrodes to optimize both sensitivity uniformity and electrical connection quality. Instead of using a uniformly thin thickness that would increase resistance, the patent specifies that first connecting electrodes have a first thickness and second connecting electrodes have a second thickness different from the first. This parameter variation allows the system to achieve low sensitivity deviations while maintaining adequate electrical connection quality through strategic thickness differentiation.
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 configuration enhances the touch sensitivity of the touch sensing unit by reducing resistance and sensitivity deviations, resulting in improved performance and user interaction.
Implementation Method 1
a thickness of the second connecting electrodes is different from thicknesses of the first touch electrodes and the second touch electrodes, respectively
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.