Display Panel Light Shielding Layer Sharp Edge Fabrication
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Solution Overview
Problem
The existing patterned light shielding layers in display panels, formed via wet processes, often have poor linearity and sharpness, leading to inadequate light shielding and reduced display contrast due to their non-ideal edge characteristics.
Innovation Solution
A method for fabricating a top substrate with a patterned light shielding layer that involves forming a patterned anti-reflective layer and a hydrophobic layer on the support plate, followed by the deposition of the light shielding layer using a wet process such as ink-jet printing, ensuring sharp edges and improved linearity, and optionally including a protective layer and an underlying layer for enhanced performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a patterned light shielding layer is formed via wet process (ink-jet, screen or APR printing), then the light shielding layer can be applied to prevent light leakage, but the edges of the patterned light shielding layer have poor linearity and sharpness, resulting in poorer shielding effect and worse contrast
Solution Approach 1:
The patent applies preliminary action by forming a hydrophobic layer on the substrate before depositing the light shielding material. This pre-treatment creates a surface that controls the spreading and drying of the ink-jet applied material, ensuring sharp edges and good linearity are achieved during the deposition process itself, rather than requiring post-processing or accepting poor edge quality
Solution Approach 2:
The patent changes the surface energy parameters of the substrate by applying a hydrophobic layer treatment. This parameter change in surface wettability controls how the light shielding ink interacts with the substrate during deposition, enabling the formation of patterns with sharp edges and excellent linearity that were not achievable with standard hydrophilic surfaces using wet processes
2Ease of manufacture
If the patterned light shielding layer is formed with wet processes, then the manufacturing process is simple and cost-effective, but the linearity and sharpness of the edges are far from ideal
Solution Approach 1:
The hydrophobic layer is formed as a preliminary step before light shielding deposition, preparing the surface to receive the ink-jet applied material in a controlled manner. This maintains the simplicity of wet processes while dramatically improving edge quality
Solution Approach 2:
The hydrophobic layer acts as an intermediary between the substrate and the light shielding material. It mediates the interaction during deposition, controlling the flow and drying characteristics of the ink to produce sharp edges, while still allowing the overall process to remain a simple wet process application
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 provides a patterned light shielding layer with sharp edges and good linearity, effectively preventing light leakage and improving display contrast without compromising image quality.
Implementation Method 1
a top surface of the patterned anti-reflective layer may be modified, and a hydrophobic layer may be formed on the top surface of the patterned anti-reflective layer
Data Source
AI summary
A display panel according to an embodiment has a first region and a second region beside the first region, and includes a top substrate, a bottom substrate and a display layer disposed between the top and the bottom substrate. The top substrate comprises a support plate having an outer surface, a patterned light shielding layer disposed on the outer surface of the support plate and located within the first region, and a patterned anti-reflective layer disposed on the outer surface of the support plate and being blank at the first region. The patterned light shielding layer of the display panel may be formed on the outer surface of the support plate via a wet process and may be patterned with sharp edges and good linearity to provide the desirable light shielding effect.