Array Substrate Uniform Electric Field via Dummy Electrode Lines
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In LCD displays with touch functions, achieving a uniform electric field to enhance display quality is challenging due to the influence of sensing electrodes on electrical signals, leading to non-uniform electrical fields and compromised display performance.
Innovation Solution
The array substrate incorporates alternately arranged driving and sensing electrode regions with dummy electrode lines and through holes to connect common electrodes, ensuring a uniform electric field by reducing the impact of sensing electrodes and maintaining a consistent electric field distribution across the substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If sensing electrode regions are incorporated into the array substrate, then touch functionality is enabled, but the electric field becomes non-uniform and display quality deteriorates
Solution Approach 1:
The patent introduces dummy driving electrode lines in the sensing electrode regions that are copies of the driving electrode lines in the driving electrode regions. These dummy lines replicate the electrical structure to compensate for the presence of sensing electrodes, thereby maintaining uniform electric field distribution while preserving touch functionality.
Solution Approach 2:
The patent modifies the electrical connection parameters by introducing through holes that connect the second common electrode in sensing electrode regions to the dummy driving electrode lines. This parameter change allows the sensing electrode regions to have the same electrical characteristics as driving electrode regions, ensuring uniform electric field distribution across the entire substrate.
2Device complexity
If the second common electrode is connected to the driving electrode line, then electrical connection is simplified, but the sensing electrode cannot function properly
Solution Approach 1:
The patent segments the electrical connection path by introducing dummy driving electrode lines as intermediate elements. The second common electrode connects to the dummy driving electrode line through through holes, which then connect to the driving electrode line. This segmentation allows the sensing electrode to maintain its functionality while achieving simplified overall connection structure.
Solution Approach 2:
The dummy driving electrode lines serve as intermediary elements between the second common electrode and the driving electrode line. These intermediary lines enable proper electrical connection in sensing electrode regions without interfering with the sensing electrode functionality, effectively mediating the connection between different functional regions.
3Manufacturing precision
If dummy electrode lines are added to balance electric fields, then display quality improves, but the device structure becomes more complex
Solution Approach 1:
The dummy driving electrode lines serve multiple functions: they balance the electric field in sensing electrode regions, provide a connection path for the second common electrode, and maintain the overall electrical symmetry of the substrate. This multi-functionality reduces the need for additional separate structures, thereby limiting the increase in device complexity while achieving uniform electric field distribution.
Data Source
AI summary
An array substrate includes at least one driving electrode region and at least one sensing electrode region which are alternately arranged along a row direction and are disconnected from each other, each driving electrode region and each sensing electrode region include one first common electrode and one second common electrode respectively, at least one driving electrode line continuously passes through the driving electrode region and the sensing electrode region alternately arranged along the row direction. The first common electrode in the driving electrode region is connected to the driving electrode line through at least one first through hole, the second common electrode in the sensing electrode region is disconnected from the driving electrode line.