Display Module Touch Electrodes Different Sizes Parasitic Capacitance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display modules lack enhanced sensitivity in input sensing, particularly in capacitive touch applications, due to limitations in electrode design and insulation layers, which affect the accuracy and reliability of touch input detection.
Innovation Solution
A display module with an input sensing unit directly integrated onto the display panel, featuring a first electrode and a second electrode with specific directional orientations and insulation layers to reduce parasitic capacitance, enhancing sensitivity and accuracy of touch input detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the input sensing unit is directly disposed on the display panel, then the sensitivity and accuracy of touch input detection is improved, but the device structure becomes more complex
Solution Approach 1:
The patent combines the display panel and input sensing unit into a single integrated structure, where the sensing unit is directly disposed on the display panel. This merging eliminates the need for separate sensing layers and reduces overall device complexity while maintaining high touch detection accuracy through the integrated electrode design.
Solution Approach 2:
The display panel serves multiple functions: it acts as both the display element and the substrate for the input sensing unit. The insulating layer integrated within the display panel structure provides both electrical insulation and structural support, reducing the need for additional components and simplifying the overall device architecture.
2Measurement precision
If electrodes of different sizes are used, then the signal-to-noise ratio is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent employs electrodes with different sizes at different locations within the sensing unit. The first electrode has a different area than the second electrode, allowing each electrode to be optimized for its specific functional requirements. This local quality variation improves the signal-to-noise ratio by creating differential capacitance responses to touch inputs.
3Length of moving object
If the module structure is made thinner, then the portability is improved, but the risk of cracks during folding increases
Solution Approach 1:
The patent uses a composite insulating layer structure combining organic and inorganic materials. This composite approach provides both mechanical flexibility to prevent cracks during folding and adequate thickness to maintain structural integrity. The multi-layer insulating structure distributes stress more evenly, reducing crack propagation risk in thin designs.
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 solution improves the sensitivity and accuracy of touch input detection by optimizing the electrode design and insulation layers, reducing parasitic capacitance and maintaining a thinner module structure, thus preventing cracks during folding and enhancing the signal-to-noise ratio.
Implementation Method 1
reducing parasitic capacitance
Data Source
AI summary
A display module includes a display panel and an input sensing unit. The display panel includes a base surface. The input sensing unit is directly disposed on the base surface. The input sensing unit includes a first electrode, a second electrode, and an insulation layer. The first electrode extends in a first direction. The first electrode includes a first opening area. The second electrode extends in a second direction intersecting the first direction. The second electrode is longer than the first electrode. The second electrode includes a second opening area of a size greater than a size of the first opening area. The insulation layer is configured to insulate the first electrode from the second electrode.