Array Panel Touch-Signal-Line Stacking for Aperture Gain
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Solution Overview
Problem
Existing liquid crystal display panels face issues with reduced aperture ratio and visual defects due to asymmetrical electric fields caused by the integration of touch signal lines in non-opening areas, leading to transmittance deviations and brightness differences.
Innovation Solution
The touch signal lines are arranged within the opening areas of sub-pixels, with a common electrode positioned between them and pixel electrodes to shield asymmetrical electric fields, and a function electrode structure that includes multiple sub-function electrode portions to enhance shielding and reduce black matrix patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If touch signal lines are integrated in non-opening areas, then device functionality is enhanced, but aperture ratio is reduced and visual defects occur
Solution Approach 1:
The touch signal line is repositioned from the planar non-opening area to a three-dimensional stacked configuration within the opening area, utilizing the vertical dimension to resolve the conflict between functionality and aperture ratio
Solution Approach 2:
The touch signal line is nested within the opening area structure, positioned between the common electrode and pixel electrode layers, allowing multiple functional elements to coexist in a compact vertical arrangement
2Adaptability or versatility
If touch signal lines are arranged in non-opening areas, then device functionality is enhanced, but asymmetrical electric fields cause visual defects
Solution Approach 1:
The common electrode serves as an intermediary shielding layer between the touch signal line and the pixel electrode, mediating the electric field interaction and preventing asymmetrical field distortion from reaching the liquid crystal layer
Solution Approach 2:
The common electrode is positioned in advance to preemptively shield against the potential harmful effect of asymmetrical electric fields generated by the touch signal line, preventing visual defects before they occur
3Area of stationary object
If touch signal lines are placed in opening areas, then aperture ratio is improved, but electric field shielding is required
Solution Approach 1:
The common electrode performs multiple functions simultaneously: it serves as the common electrode for liquid crystal driving and as a shielding layer for the touch signal line, reducing the need for additional dedicated shielding structures
Solution Approach 2:
The shielding function is merged with the common electrode structure, combining two functional requirements into a single electrode layer to reduce overall device complexity
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
This arrangement increases the aperture ratio by 2% and reduces visual defects, improving display quality and yield by stabilizing electric fields and minimizing black or white stains.
Implementation Method 1
a common electrode positioned between them and pixel electrodes to shield asymmetrical electric fields
Data Source
AI summary
An array substrate includes: a substrate; a sub-pixel, wherein the sub-pixel is located on the substrate, and the sub-pixel includes a pixel electrode and a common electrode, an orthographic projection of the pixel electrode on the substrate at least partially overlap an orthographic projection of an opening area of the sub-pixel on the substrate, and an orthographic projection of the common electrode on the substrate at least partially overlaps the orthographic projection of the opening area of the sub-pixel on the substrate; and a touch signal line, wherein the touch signal line is located on the substrate, and an orthographic projection of the touch signal line on the substrate partially overlaps the orthographic projection of the opening area of the sub-pixel on the substrate; the touch signal line, the common electrode and the pixel electrode are stacked in sequence along a direction away from the substrate.