Touch Electrode Layout With Variable Connectors for Sensitivity Uniformity
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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 electrode thickness and connectivity configurations.
Innovation Solution
A touch sensing unit design with first and second touch electrodes arranged along different axes, connected by first and second connecting electrodes of varying thicknesses to minimize resistance and sensitivity deviations, enhancing overall touch sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If uniform thickness electrodes are used, then manufacturing is simpler, but touch sensitivity is reduced due to resistance variations
Solution Approach 1:
The patent applies local quality by varying the thickness of connecting electrodes at different locations. Specifically, connecting electrodes have different thicknesses (first thickness for horizontal connections, second thickness for vertical connections) to locally compensate for resistance variations in different directions, thereby improving overall touch sensitivity without requiring complete uniformity across all electrodes.
Solution Approach 2:
The patent changes the physical parameter of electrode thickness to optimize performance. By adjusting the thickness parameter of connecting electrodes based on their orientation and position, the design compensates for resistance variations and improves touch sensitivity while maintaining manufacturability through controlled parameter variation rather than complete uniformity.
2Reliability
If thicker connecting electrodes are used, then resistance is reduced, but device complexity increases
Solution Approach 1:
The patent applies local quality by making connecting electrodes thicker only where needed for resistance compensation, rather than uniformly increasing all electrode thicknesses. The first connecting electrodes have a first thickness and the second connecting electrodes have a second thickness, creating localized variations that reduce resistance in specific directions without unnecessarily increasing overall device complexity.
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.