Array Substrate Electrode Layout for Flicker-Free Display Uniformity
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Solution Overview
Problem
Current display devices suffer from poor display effects due to uneven brightness caused by uneven diffusion of alignment fluid during the formation of the alignment film on the array substrate, leading to issues like screen flickering and jittering, especially when displaying blue images.
Innovation Solution
The array substrate incorporates a design with lap electrodes lapped to the common electrode layer and auxiliary electrodes not lapped to the common electrode layer in the common signal lines, reducing the number of vias needed and ensuring uniform storage capacitance across sub-pixel regions, thereby improving the uniformity of alignment fluid diffusion and reducing brightness unevenness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vias are used to electrically connect the common electrode layer to the common signal line, then electrical connection is achieved, but the alignment fluid diffusion becomes uneven causing screen flickering and jittering
Solution Approach 1:
The patent extracts and eliminates the via structure from the electrical connection path between the common electrode layer and common signal line. By removing the via, the source of alignment fluid diffusion disruption is eliminated, thereby solving the screen flickering and jittering problems while maintaining electrical connection through the direct lapping contact between the common electrode layer and common signal line.
2Reliability
If multiple vias are formed for electrical connection, then connection reliability improves, but the manufacturing complexity and risk of alignment fluid diffusion issues increase
Solution Approach 1:
The via structure is completely extracted and removed from the design. Instead of forming multiple vias for electrical connection, the patent uses a direct lapping contact between the common electrode layer and common signal line, simplifying the structure while maintaining connection reliability.
Solution Approach 2:
The patent merges the electrical connection function with the alignment film formation process. The common signal line is designed to extend over the common electrode layer with direct contact, combining the electrical connection path with the alignment fluid diffusion path, thereby eliminating the need for separate via structures.
3Illumination intensity
If the common signal line is directly connected to the common electrode layer through lapping, then alignment fluid diffusion uniformity improves, but the electrical connection design becomes more complex
Solution Approach 1:
The common signal line is designed to serve multiple functions simultaneously: it provides electrical connection to the common electrode layer through direct lapping contact, and it serves as the alignment reference for alignment fluid diffusion. This multi-functionality reduces the need for separate structures and simplifies the overall design.
Solution Approach 2:
The common signal line is designed to maintain equipotential contact with the common electrode layer through the lapping connection. This ensures uniform electrical potential distribution across the common electrode layer, which in turn promotes uniform alignment fluid diffusion and eliminates display non-uniformity issues.
Data Source
AI summary
An array substrate (000) and a display apparatus, relating to the technical field of display. The array substrate (000) comprises: a substrate (100); a pixel electrode layer (200) and a common electrode layer (300) located on the substrate (100); and a plurality of common signal lines (400) located on the substrate (100), wherein the common signal lines (400) are insulated from the pixel electrode layer (200) and electrically connected to the common electrode layer (300), and an orthographic projection of the common signal lines (400) on the substrate (100) and an orthographic projection of the pixel electrode layer (200) on the substrate (100) have an overlapping area. The common signal lines (400) are provided with a plurality of electrode structures (400a), wherein different electrode structures (400a) are located in different sub-pixel areas (00a), and the plurality of electrode structures (400a) comprise: a connection electrode (401) connected with the common electrode layer (300), and an auxiliary electrode (402) not connected with the common electrode layer (300). The connection electrode (401) and the auxiliary electrode (402) are both provided in the common signal lines (400), and thus the sizes of storage capacitors (Cst) in the sub-pixel areas (00a) where the connection electrode (401) and the auxiliary electrode (402) are located are approximately the same, thereby reducing the probability of bad phenomena such as picture flicker and jitter of the picture displayed by the display apparatus.