Multi-layered Sealant Moisture Resistance LCD Panel
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Solution Overview
Problem
Liquid crystal displays (LCDs) face degradation in display quality due to moisture penetrating into the liquid crystal layer, which existing technologies have not effectively addressed.
Innovation Solution
A multi-layered sealant is used in the display panel, comprising a first sealant layer with an acrylate resin having at least 3 carbon atoms and a second sealant layer with a modified epoxy resin having a (meth)acrylate group, applied around the peripheral area to reduce moisture permeability by forming a boundary that decreases water absorption and solubility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single-layer sealant is used to seal the liquid crystal layer, then the manufacturing process is simple, but moisture can penetrate into the liquid crystal layer causing display quality degradation
Solution Approach 1:
The sealant is divided into multiple layers with different material compositions. The first sealant layer uses acrylate resin with functional groups having at least 3 carbon atoms, while the second sealant layer uses epoxy resin with (meth)acrylate groups. This segmentation allows each layer to provide different protective functions, collectively achieving superior moisture resistance that a single-layer sealant cannot provide.
Solution Approach 2:
The patent employs composite materials by combining different resin systems in a multi-layered sealant structure. The acrylate resin layer and epoxy resin layer are applied sequentially to form a composite sealing system that leverages the complementary properties of each material to prevent moisture penetration more effectively than either material alone.
2Reliability
If the sealant uses simple resin composition, then the manufacturing cost is low, but moisture permeability is high causing display degradation
Solution Approach 1:
Different regions of the sealant structure have different material qualities tailored to their specific functions. The first sealant layer contains acrylate resin with functional groups having at least 3 carbon atoms for specific bonding characteristics, while the second layer contains epoxy resin with (meth)acrylate groups for enhanced moisture barrier properties. This local differentiation of material quality optimizes moisture resistance while managing manufacturing complexity.
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 multi-layered sealant significantly reduces moisture permeability, thereby enhancing the display panel's durability and maintaining image quality by preventing moisture-induced degradation.
Implementation Method 1
Light is provided to the sealing composition to harden the sealing composition
Implementation Method 2
Heat is provided to the sealing composition to further harden the sealing composition
Data Source
AI summary
A display panel is provided. A first substrate includes a display area and a peripheral area. The peripheral area surrounds the display area. A second substrate is disposed on the first substrate. The second substrate faces the first substrate along a first direction. A liquid crystal layer is interposed between the first substrate and the second substrate. A multi-layered sealant is disposed on the peripheral area of the first substrate. The multi-layered sealant surrounds the liquid crystal layer. The multi-layered sealant includes a first sealant layer including an acrylate resin having a functional group having at least 3 carbon atoms, and a second sealant layer including an epoxy resin having a (meth)arcylate group.