Light-Scattering Resin Layer Adhesion in Display Laminates
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Solution Overview
Problem
The presence of a light scattering agent in resin layers leads to the generation of defect portions, where the resin layer is absent or significantly reduced in thickness, causing issues in display devices.
Innovation Solution
A layered body comprising a substrate layer with a resin layer containing a light scattering agent, where the contact angle difference between the substrate and resin layers is controlled within specific ranges, and optionally incorporating quantum dots, to enhance adhesion and reduce defect formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light scattering agent is contained in a resin layer, then light scattering property is improved, but defect portions are generated in the resin layer
Solution Approach 1:
The patent applies parameter changes by controlling the contact angle difference between the substrate layer and resin layer within a specific range (5° or less). This parameter control ensures proper wetting and adhesion of the resin layer containing light scattering agents, preventing defect formation while maintaining light scattering properties. The contact angle serves as a critical parameter that balances light scattering functionality with layer integrity.
Solution Approach 2:
The patent utilizes light scattering agents (which create micro-scale porous or particulate structures) within the resin layer to achieve light scattering properties. By carefully controlling the integration of these scattering agents through contact angle management, the patent prevents their aggregation or improper distribution that would cause defects, while still achieving the desired light scattering effect.
2Illumination intensity
If a light scattering agent is contained in a resin layer, then light scattering property is improved, but adhesion between layers deteriorates
Solution Approach 1:
The patent controls the contact angle difference parameter between substrate and resin layers to 5° or less, which optimizes the wetting behavior and interfacial adhesion. This parameter control ensures that the resin layer properly adheres to the substrate even when containing light scattering agents, preventing delamination while maintaining light scattering functionality.
Solution Approach 2:
The patent creates a composite structure by integrating light scattering agents into the resin layer while managing interfacial properties. The composite material approach combines the resin matrix with light scattering particles, and the contact angle control ensures proper bonding between this composite layer and the substrate, maintaining both adhesion and light scattering properties.
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 effectively suppresses defect portions in the resin layer, ensuring high adhesion and consistent light scattering properties, thereby improving the integrity and performance of display devices.
Implementation Method 1
a resin layer disposed on at least one surface of the substrate layer, wherein the resin layer contains a light scattering agent (A)
Implementation Method 2
when a contact angle of the substrate layer with respect to diiodomethane is indicated by θs (°) and a contact angle of the resin layer with respect to diiodomethane is indicated by θr (°), the following formula: |θs−θr|≤21 is satisfied
Data Source
AI summary
There are provided a layered body and a display device including the same, the layered body including a substrate layer and a resin layer disposed on at least one surface of the substrate layer, in which the resin layer contains a light scattering agent (A), and, when the contact angle of the substrate layer with respect to diiodomethane is indicated by θs (°) and the contact angle of the resin layer with respect to diiodomethane is indicated by θr (°), the following formula: |θs−θr|≤21 is satisfied.