Pixel Electrode Rough Surface Drains Alignment Liquid
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Solution Overview
Problem
The manufacturing of liquid crystal display panels faces issues with uneven thickness of the alignment layer due to accumulation of alignment liquid in recesses on the pixel electrode, caused by the absence of post spacers on the array substrate, leading to defects in display quality.
Innovation Solution
The array substrate incorporates a conductive portion with a rough surface on the pixel electrode to effectively drain alignment liquid, ensuring even thickness of the alignment layer by improving infiltration and fluidity, thus preventing uneven brightness (Mura) in liquid crystal display panels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If alignment liquid is transferred to the pixel electrode surface, then the alignment layer is formed, but the alignment liquid accumulates in the recess caused by the via hole, resulting in uneven thickness of the alignment layer
Solution Approach 1:
The invention applies a rough surface treatment specifically to the conductive portion (peripheral body) that surrounds the recess, while other areas maintain their original smooth surfaces. This localized surface modification creates capillary channels only where needed for drainage, allowing the alignment liquid to be drained from the recess without affecting the alignment layer formation in other areas.
Solution Approach 2:
The rough surface structure acts as an intermediary mechanism between the recess and the external environment. The capillary channels formed by the rough surface serve as intermediate pathways that facilitate the drainage of alignment liquid from the recess, preventing direct accumulation while maintaining the overall alignment layer structure.
2Object-generated harmful factors
If post spacers are added to the array substrate to drain alignment liquid, then alignment liquid drainage is improved, but the device complexity increases
Solution Approach 1:
The invention merges the drainage function with the existing conductive portion (peripheral body) of the pixel electrode structure. By forming a rough surface on the conductive portion, the drainage function is integrated into the existing structure without adding separate post spacer components, thus avoiding increased device complexity.
Solution Approach 2:
The rough surface structure on the conductive portion provides self-service drainage functionality. The capillary channels formed by the rough surface automatically drain the alignment liquid through capillary action without requiring additional active components or complex control mechanisms.
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
The solution achieves an even thickness of the alignment layer, enhancing display quality by preventing the accumulation of redundant alignment liquid and addressing the issue of uneven brightness, thereby improving the overall performance of liquid crystal display panels.
Implementation Method 1
a rough surface is disposed on the conductive portion and is configured to drain alignment liquid
Data Source
AI summary
The present application discloses an array substrate and a liquid crystal display panel. The array substrate includes an underlay substrate, a first electrode layer, a protection layer, and a second electrode layer that are disposed sequentially. The second electrode layer includes a pixel electrode, and the pixel electrode includes a pixel electrode main body and a conductive portion connected to each other. A rough surface is disposed on the conductive portion for draining redundant alignment liquid on the conductive portion such that a thickness of an alignment layer formed by curing the alignment liquid is even.