Touch Control Electrode Structure With Mesh Connection Layer
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Solution Overview
Problem
Touch control panels with conductive bridges on thin-film encapsulation layers of display panels experience high connection resistance and open circuits, leading to decreased touch sensitivity and signal-to-noise ratio due to small contact areas between electrodes.
Innovation Solution
A touch control electrode structure featuring a substrate with patterned electrodes divided into portions, an insulating layer with through-holes for electrical connection, and a mesh structured electrical connection layer, which reduces connection resistance and enhances sensitivity and signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conductive bridges with stripe structure are used to connect electrodes, then the manufacturing process is simple, but the connection area is small causing high connection resistance and open circuits
Solution Approach 1:
The conductive bridge is segmented into multiple parallel conductive segments (first conductive segment and second conductive segment) instead of a single stripe structure. This segmentation increases the total connection area between electrodes while maintaining manufacturing simplicity through standardized patterning processes.
Solution Approach 2:
The conductive bridge structure transitions from a one-dimensional stripe to a two-dimensional mesh network formed by intersecting first and second conductive segments. This dimensional change significantly increases the connection area and provides multiple parallel conduction paths, reducing connection resistance and improving reliability.
2Area of stationary object
If small area contact points are used in conductive bridges, then the electrode structure is compact, but touch sensitivity decreases due to high connection resistance
Solution Approach 1:
The contact area between conductive bridge and electrode is segmented into multiple contact points along the first and second conductive segments. This segmentation distributes the electrical connection across multiple locations, increasing total contact area while keeping the overall structure compact and maintaining high touch sensitivity.
Solution Approach 2:
The contact interface evolves from point contacts to line contacts and eventually to area contacts through the mesh structure. The first and second conductive segments create extended contact zones with the electrodes, increasing the effective contact area without significantly increasing the footprint of the electrode structure.
3Device complexity
If stripe structured conductive bridges are used, then the device structure is simple, but RC delay increases due to high connection resistance
Solution Approach 1:
The conductive bridge is divided into multiple parallel conductive paths through the mesh structure of first and second conductive segments. This segmentation creates multiple parallel RC circuits with lower equivalent resistance, reducing the overall RC delay while maintaining a relatively simple device structure through regular patterning.
Solution Approach 2:
The conductive bridge structure transitions from one-dimensional stripe to two-dimensional mesh, creating multiple parallel conduction paths. This dimensional change reduces the equivalent resistance by providing multiple current flow paths, thereby decreasing RC delay without significantly increasing device complexity.
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 described structure decreases connection resistance, increases touch sensitivity, and improves the signal-to-noise ratio by ensuring reliable electrical connections through the mesh structure and through-holes, addressing the limitations of existing touch control panels.
Implementation Method 1
an electrical connection layer electrically connected to the first portion and the second portion... the electrical connection layer, the first portion, and the second portion are electrically connected to each other by the through-holes
Data Source
AI summary
The present disclosure provides a touch control electrode structure and a touch control panel. An insulating layer is disposed between the electrode layer and the electrical connection layer, and a plurality of through-holes are included in the insulating layer to correspond to the first portion and the second portion, so that the electrical connection layer, the first portion, and the second portion are electrically connected to each other by the through-holes, therefore connection resistance is decreased, touch sensitivity is increased, RC delay is decreased, and signal-to-noise ratio is increased.