Array Substrate Common Electrode Segmentation for Voltage Drop Reduction
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Solution Overview
Problem
Traditional liquid crystal display devices with fringe field switching mode suffer from significant voltage drops in common electrode signals due to high resistance, leading to uneven display quality.
Innovation Solution
The array substrate design includes a common electrode line connected to the common electrode within each subpixel, with separate arrangements and insulation to reduce voltage drop, and the use of shielding electrodes to prevent interference signals, improving display evenness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a whole ITO common electrode is used to cover the entire display region, then the common electrode can provide uniform coverage, but significant voltage drop occurs due to resistance, adversely affecting display evenness
Solution Approach 1:
The patent divides the common electrode into multiple independent common electrode units, each connected to the common electrode line at different positions. This segmentation reduces the resistance path length for each unit, thereby minimizing voltage drop and improving display evenness across the display region.
Solution Approach 2:
The patent transitions from a planar common electrode structure to a multi-layer structure where common electrode units are arranged in different layers. The first common electrode unit is arranged in a first layer and the second common electrode unit is arranged in a second layer, creating a three-dimensional arrangement that reduces resistance and improves signal distribution.
2Device complexity
If the common electrode line is arranged at the periphery of the display region, then the structure is simple, but the voltage drop between regions adjacent to and away from the common electrode line is significant
Solution Approach 1:
The common electrode is segmented into multiple units distributed across different regions of the display, with each unit connected to the common electrode line at different positions. This segmentation allows for more uniform voltage distribution while maintaining structural simplicity.
Solution Approach 2:
Different regions of the display have locally optimized common electrode configurations, with common electrode units strategically positioned to address specific voltage drop issues in different areas, achieving overall display evenness through localized optimizations.
Data Source
AI summary
The present disclosure provides an array substrate, a display panel, a display device and a method for manufacturing the array substrate. The array substrate includes: a plurality of gate lines and a plurality of data lines arranged in a crisscross manner on a base substrate, so as to define a plurality of subpixels; and a common electrode arranged opposite to each of the plurality of subpixels. At least one of the subpixels is provided with a common electrode line connected to the common electrode at an identical subpixel region.