Sharing Electrode Array Substrate for Smoother LCD Pixel Layout
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Solution Overview
Problem
Display panels with backlight sources, such as LCDs, suffer from low light transmittance due to a small light-transmitting region, which limits display brightness and efficiency.
Innovation Solution
The array substrate design includes multiple gate lines, data lines, and pixel units with a drive circuit and sharing electrodes, where the sharing electrodes are formed in different metal layers to prevent jagged edges and optimize the layout, allowing for increased light transmittance by reducing non-light-transmitting areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the pixel design uses conventional electrode layout, then the drive circuit can be properly formed, but the light-transmitting region area is small resulting in low light transmittance
Solution Approach 1:
The sharing electrode is divided into two layers (first sharing electrode in first metal layer, second sharing electrode in second metal layer) stacked in the vertical dimension. This multi-layer stacking allows the electrode to occupy vertical space rather than horizontal space, thereby increasing the light-transmitting region area in the planar view while maintaining proper electrode connectivity and drive circuit formation.
Solution Approach 2:
The sharing electrode is segmented into multiple parts distributed across different metal layers. The first sharing electrode and second sharing electrode are electrically connected through connection holes, creating a segmented structure that distributes the electrode function across multiple layers, thus increasing light transmittance while maintaining electrical functionality.
2Device complexity
If the sharing electrode is formed in a single metal layer, then the structure is simple, but jagged edges occur reducing display quality
Solution Approach 1:
By moving part of the sharing electrode to another metal layer, the design eliminates jagged edges in the planar view. The multi-layer configuration allows for smoother electrode edges while distributing the structural complexity across multiple fabrication layers, improving display quality without overwhelming manufacturing complexity.
3Area of stationary object
If more metal layers are used for sharing electrodes, then light transmittance increases, but manufacturing complexity increases
Solution Approach 1:
The sharing electrode function is segmented across two metal layers rather than using a single complex layout. This segmentation allows each layer to have a simpler, more regular pattern that is easier to manufacture, while the combination of layers achieves the desired light transmittance improvement.
Solution Approach 2:
The design uses vertical stacking in the third dimension to solve the light transmittance problem, rather than expanding the horizontal electrode pattern which would increase planar complexity. This dimensional transition maintains manufacturing simplicity while achieving the light transmittance goal.
Data Source
AI summary
An array substrate and a method for manufacturing the same, and a display panel are provided. The array substrate includes a base substrate, gate lines, data lines, and multiple pixel units. The pixel unit includes a pixel electrode, a drive circuit, and a sharing electrode. The pixel electrode is electrically connected to the drive circuit. The drive circuit includes a first thin-film transistor, a second thin-film transistor, and a third thin-film transistor. A source of the third thin-film transistor is connected to a drain of the second thin-film transistor. A drain of the third thin-film transistor is connected to the sharing electrode. The sharing electrode includes a first sharing electrode and a second sharing electrode electrically connected to the first sharing electrode. The projection of the first sharing electrode on the base substrate at least partially overlaps the projection of the pixel electrode on the base substrate.