Display Substrate Electrode Lead Gaps for Touch Accuracy
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Solution Overview
Problem
Capacitive touch screens face challenges in accurately detecting touch points due to the lack of effective electrical disconnection between electrodes, leading to reduced accuracy and increased manufacturing complexity.
Innovation Solution
A display substrate design featuring electrode leads with gaps that electrically disconnect adjacent electrodes, allowing for precise touch point detection by creating a shadow region during material evaporation, thereby improving accuracy and simplifying manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If gaps are added to electrode leads to achieve electrical disconnection, then touch detection accuracy is improved, but manufacturing complexity increases
Solution Approach 1:
The electrode lead is segmented by introducing gaps that divide the continuous conductive structure into separate sections. This segmentation achieves electrical disconnection between adjacent electrodes while maintaining the overall lead structure, enabling accurate touch detection through proper electrode isolation.
Solution Approach 2:
The gap structure extends in multiple dimensions (length, width, and depth) to achieve effective electrical disconnection. The gap's three-dimensional configuration ensures complete isolation between adjacent electrodes, preventing signal interference and improving touch detection accuracy.
2Quantity of substance
If more electrodes are disposed on the substrate, then touch screen functionality is enhanced, but electrical interference between electrodes increases
Solution Approach 1:
By segmenting the electrode leads with gaps, adjacent electrodes are electrically isolated from each other. This allows a higher density of electrodes to be arranged on the substrate without causing signal interference, as each electrode maintains independent electrical connectivity.
3Reliability
If electrode leads with gaps are used, then electrical disconnection is achieved, but manufacturing process complexity increases
Solution Approach 1:
The gaps are designed and positioned in advance during the electrode lead fabrication process. By pre-planning the gap locations and dimensions in the manufacturing process, reliable electrical disconnection is achieved without requiring complex post-processing or additional manufacturing steps.
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 enhances touch accuracy and reduces manufacturing complexity by ensuring electrical disconnection between electrodes, allowing for a higher number of electrodes on the substrate while maintaining a thin design, thus improving display performance and touch effects.
Implementation Method 1
creating a shadow region during material evaporation
Data Source
AI summary
A display substrate includes a substrate, a plurality of electrode leads disposed on the substrate, and a plurality of electrodes electrically disconnected with each other disposed on the substrate. Each electrode is in direct contact with one or more of the plurality of electrode leads, and a thickness of each electrode lead is greater than a thickness of a corresponding electrode. At least one of the plurality of electrode leads is respectively provided with at least one gap, and each gap is configured to electrically disconnect one of the plurality of electrodes that is in direct contact with a corresponding electrode lead from another one of the plurality of electrodes that is adjacent to the corresponding electrode lead.