Touch Panel Electrode Layout for Foldable OLED Sensitivity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Foldable OLED display devices face challenges in maintaining touch control performance due to changes in thickness and dielectric constant, leading to reduced signal amounts and deteriorated touch control sensitivity.
Innovation Solution
A touch control panel design featuring intersecting touch control structures with extended branches and protrusions, increasing interaction areas and mutual capacitance values to enhance touch control performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the touch control panel uses a conventional structure without extended branches, then the device maintains simple structure and manufacturing process, but the interaction area between electrodes is limited, resulting in reduced mutual capacitance values and deteriorated touch control sensitivity
Solution Approach 1:
The touch control electrode is segmented into a main body and multiple extended branches, where each branch independently increases the interaction area with adjacent electrodes. This segmentation allows the electrode to cover more area without requiring a complete redesign of the entire touch control panel structure.
Solution Approach 2:
The electrode structure transitions from a simple planar configuration to a multi-dimensional layout with branches extending in different directions. This dimensional expansion increases the interaction area between electrodes, thereby enhancing mutual capacitance values and touch control sensitivity without significantly complicating the manufacturing process.
2Measurement precision
If the touch control electrode structure is extended with branches and protrusions to increase interaction area, then mutual capacitance values and touch control sensitivity are improved, but the manufacturing precision requirements increase due to more complex patterns
Solution Approach 1:
The complex electrode pattern is divided into modular segments (main body and branches) that can be fabricated using standard photolithography processes. Each segment is designed with clear geometric boundaries that are compatible with existing manufacturing capabilities, reducing the overall precision requirement compared to a completely new complex design.
Solution Approach 2:
The electrode structure parameters (branch length, width, spacing, and protrusion dimensions) are optimized to achieve maximum interaction area within the constraints of existing manufacturing precision. By carefully selecting these parameters, the design achieves enhanced sensitivity without requiring beyond-standard fabrication precision.
3Speed
If metal mesh is used for touch control electrodes instead of transparent conductive material, then resistance is reduced and response speed is improved, but the thickness increases slightly affecting flexibility
Solution Approach 1:
The electrode design compensates for the increased thickness by expanding the interaction area in the planar dimensions through branch extensions. This dimensional compensation ensures that the overall touch control performance, including response speed and sensitivity, is optimized despite the slight thickness increase from using metal mesh.
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 design improves touch control sensitivity and signal amount by increasing interaction areas and mutual capacitance, optimizing touch control performance in foldable OLED devices.
Implementation Method 1
a first touch control structure includes a plurality of first touch control electrodes and a plurality of first connecting parts, and a second touch control structure includes a plurality of second touch control electrodes and a plurality of second connecting parts... increasing interaction areas and mutual capacitance values to enhance touch control performance
Data Source
AI summary
A touch control panel, a touch control display panel, and a touch control display apparatus are provided. The touch control panel includes multiple first touch control structures extending along a first direction and multiple second touch control structures extending along a second direction. The first touch control structure includes multiple first touch control electrodes and multiple first connecting parts, and the second touch control structure includes multiple second touch control electrodes and multiple second connecting parts. The first touch control electrode and the second touch control electrode are disposed in a same layer, and the first connecting part or the second connecting part is disposed in the same layer as the first touch control electrode.