Curved Display Panel Black Matrix Position Stability
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Solution Overview
Problem
Existing curved display panels face issues of light leakage and color shift due to the black matrix (BM) shifting on the upper substrate, which is exacerbated by the BM and photo spacers being formed in separate processes.
Innovation Solution
Integrally forming the isolating layer and BM as a single structure on the lower substrate, with the BM disposed on the lower substrate to prevent shifting, and using a color resist layer with different thicknesses and colors to differentiate the main and sub-isolating pillars, allowing for a unified manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the black matrix (BM) is disposed on the upper substrate to prevent light leakage, then light leakage is prevented, but the BM shifts in curved display panels having large displacement between upper and lower substrates, causing color shift
Solution Approach 1:
The patent inverts the conventional approach by disposing the black matrix (BM) on the lower substrate instead of the upper substrate. This inversion resolves the contradiction because the lower substrate provides a stable reference plane that does not shift during curvature formation, thereby maintaining BM position stability while still preventing light leakage from liquid crystals around gate and data lines.
Solution Approach 2:
The patent introduces an integrally formed structure comprising the isolating layer and BM as a unified component disposed on the lower substrate. This intermediary structure serves as a stable reference framework that prevents both light leakage and position shift, mediating between the requirements for light blocking and position stability in curved display panels.
2Reliability
If the black matrix (BM) and photo spacers are formed in two different processes, then each component can be optimized independently, but the manufacturing process becomes complex and equipment and mask requirements increase
Solution Approach 1:
The patent merges the formation of the black matrix (BM) and photo spacers into a single integrally formed structure created in one manufacturing process. This combining approach reduces process complexity and equipment/mask requirements while maintaining component optimization through careful design of the unified structure's geometric features and material properties.
Solution Approach 2:
The integrally formed structure serves multiple functions simultaneously: it acts as both the black matrix for light blocking and the photo spacer for mechanical support and alignment. This multi-functionality eliminates the need for separate formation processes while maintaining the optimized performance of each individual component through integrated design.
Data Source
AI summary
A display panel and a method of manufacturing the same are disclosed. The display panel comprises an upper substrate and a lower substrate disposed opposite to each other, a TFT layer is disposed on a side of the lower substrate away from the upper substrate, a color resist layer is disposed on a side of the TFT layer away from the lower substrate, an isolating layer and a black matrix are disposed on a side of the color resist layer away from the TFT layer, and the isolating layer and the BM are an integrally formed structure.