Array Substrate Common Electrode Layout for Uniform Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The non-uniform resistances of common electrodes in existing array substrates degrade the display effect of display devices due to variations in resistance levels across different sections of the electrodes.
Innovation Solution
The array substrate design rearranges body connection sections of adjacent sub-common electrodes on opposite sides to improve resistance uniformity, with pixel electrodes and common electrodes arranged to enhance electrical connectivity and reduce layout space, allowing for denser packing and improved display performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If common electrodes are arranged in conventional patterns, then the electrode structure is simple, but the resistance uniformity deteriorates
Solution Approach 1:
The common electrode is divided into multiple sub-common electrodes (first sub-common electrode, second sub-common electrode, etc.), each with its own body connection section. This segmentation allows independent optimization of resistance distribution across different regions, enabling uniform resistance characteristics while maintaining a manageable structural complexity through modular design.
Solution Approach 2:
The body connection sections of adjacent sub-common electrodes are positioned on opposite sides (first body connection section on first side, second body connection section on second side), creating an asymmetric arrangement. This asymmetric positioning optimizes current distribution paths and achieves uniform resistance across the common electrode structure without requiring overly complex symmetric patterns.
2Area of stationary object
If pixel electrodes and common electrodes are arranged at the same layer, then the layout space is reduced, but the electrical connectivity may be compromised
Solution Approach 1:
The electrode arrangement utilizes spatial dimensionality optimization by positioning body connection sections on opposite sides and arranging comb teeth in interdigitated patterns. This dimensional arrangement allows pixel electrodes and common electrodes to coexist at the same layer with sufficient electrical connectivity, as the three-dimensional spatial distribution compensates for the reduced layer separation.
Solution Approach 2:
The comb tooth structures serve as intermediary elements that facilitate electrical connectivity between pixel electrodes and common electrodes while maintaining compact layout. The interdigitated comb teeth create controlled coupling paths that ensure reliable electrical connection despite the same-layer arrangement, acting as mediators between the two electrode types.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Disclosed are an array substrate and a display device. The array substrate comprises: several sub-pixel units, each sub-pixel unit corresponding to one pixel electrode, and each row of sub-pixel units sharing a common electrode; each common electrode comprising multiple common sub-electrodes; the common sub-electrodes being comb-shaped interdigital electrodes; the common sub-electrodes comprising a main body connection part, a first comb-shaped branch and a shielding part; the first comb-shaped branch and the shielding part being located on the same side of the main body connection part; and the main body connection parts of two adjacent sub-common electrodes in each common electrode being located in opposite directions. Providing the main body connection parts of two adjacent common sub-electrodes in each common electrode in opposite directions increases the uniformity of resistance of the common electrodes, thereby improving the overall display effect.