Touch Substrate Mounting Hole Electrode Integrity
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Solution Overview
Problem
The integrity of touch electrodes in display panels is compromised by mounting holes, leading to poor linearity and touch precision due to reduced capacitance values and incomplete patterns of touch sub-electrodes, resulting in vibrating or broken scribed lines around the hole periphery.
Innovation Solution
A touch substrate design with a mounting hole and hole edge region, featuring adjustable connecting units that increase the facing area of touch electrodes, reducing the difference in capacitance values between the hole edge and main touch regions, and incorporating a connecting ring and light blocking ring to enhance linearity and precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a mounting hole is provided in the touch substrate, then functional devices can be mounted, but the integrity of touch electrodes is compromised and touch precision deteriorates
Solution Approach 1:
The touch substrate is divided into a main touch region and a hole edge region. The connecting units are specifically arranged in the hole edge region to bridge the gap between touch electrodes separated by the mounting hole, effectively segmenting the electrode pattern while maintaining electrical connectivity.
Solution Approach 2:
The connecting units are locally concentrated in the hole edge region where the mounting hole affects electrode integrity, while the main touch region maintains its normal electrode pattern. This localized approach restores electrode integrity only where needed without affecting the overall touch substrate design.
2Adaptability or versatility
If touch electrodes are separated by a mounting hole, then device mounting is enabled, but capacitance values decrease and linearity deteriorates
Solution Approach 1:
The connecting units act as intermediary structures that bridge the gap between touch electrodes separated by the mounting hole. These connecting units restore the electrical connection and capacitance values that would otherwise be disrupted by the hole, thereby maintaining linearity and touch precision.
3Manufacturing precision
If connecting units are arranged in the hole edge region, then electrode integrity is restored, but the complexity of the touch substrate increases
Solution Approach 1:
The connecting units are integrated into the existing touch electrode structure, merging the function of electrode connection with the hole edge region design. This integration minimizes additional complexity while effectively restoring electrode integrity through the connecting units.
Data Source
AI summary
A touch substrate is provided with a mounting hole, and has a hole edge region around the mounting hole, and a main touch region located outside of the hole edge region. The touch substrate includes a substrate a plurality of first touch units disposed on the substrate and a plurality of second touch units disposed on the substrate and insulated from the plurality of first touch units. Each first touch unit extends in a first direction and includes a plurality of first touch electrodes and a plurality of first connecting portions, and each first connecting portion is electrically connected to two adjacent first touch electrodes. Each second touch unit extends in a second direction and includes a plurality of second touch electrodes and a plurality of second connecting portions. Each second connecting portion being electrically connected to two adjacent second touch electrodes; and the first direction intersecting with the second direction.