Display Device Epoxy-Amine Binding for Cost Reduction
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Solution Overview
Problem
Existing display devices face challenges in reducing fabrication costs while maintaining a simple structure, which is essential for efficient production and performance.
Innovation Solution
A display device is designed with a substrate having light-emitting and non-light-emitting areas, featuring a light emitting element layer, a thin-film encapsulation layer, a wavelength conversion layer, a binding member with an epoxy group, and an auxiliary layer with an amine group. These components are strategically positioned and chemically bonded to simplify the structure and reduce costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a binding member and auxiliary layer are used to couple substrates, then coupling reliability is improved, but device structure becomes more complex
Solution Approach 1:
The patent introduces a binding member containing epoxy groups and an auxiliary layer containing amine groups as intermediary components between the first and second substrates. These layers chemically bond to each other (epoxy-amine reaction) to form a reliable coupling interface, while the binding member also bonds to the wavelength conversion layer and the auxiliary layer bonds to the color filter layer, creating a stable multi-layer structure without requiring direct substrate-to-substrate bonding
Solution Approach 2:
The patent controls the chemical parameters of the binding member and auxiliary layer by selecting materials with specific functional groups (epoxy groups in binding member, amine groups in auxiliary layer). The chemical bonding reaction between these groups is controlled through parameters such as curing temperature and time, transforming the physical state from uncured to cured to establish reliable coupling while maintaining structural simplicity
2Reliability
If multiple layers are added to improve coupling, then coupling reliability is improved, but fabrication cost increases
Solution Approach 1:
The patent controls the thickness parameters of the binding member (0.1-4.5 μm) and auxiliary layer (1-5 μm) to optimize both coupling reliability and fabrication cost. By maintaining these layers within specific thickness ranges, the patent achieves sufficient chemical bonding strength without requiring excessive material quantities, thereby controlling manufacturing costs while ensuring reliable coupling between substrates
Solution Approach 2:
The patent uses composite material structures where the binding member contains epoxy resin with epoxy groups and the auxiliary layer contains amine-functionalized materials. These composite layers provide both mechanical support and chemical bonding functionality, achieving reliable coupling through the epoxy-amine reaction while using materials that can be applied through standard fabrication processes
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 proposed solution effectively reduces fabrication costs and simplifies the structure of the display device, while maintaining performance by utilizing a chemically bonded binding member and auxiliary layer, which enhances coupling reliability and light conversion efficiency.
Implementation Method 1
the epoxy group of the binding member and the amine group of the auxiliary layer are chemically bonded to each other
Implementation Method 2
a wavelength conversion layer on the thin-film encapsulation layer
Data Source
AI summary
A display device includes: a substrate comprising light-emitting areas and a non-light-emitting area; a light emitting element layer on the substrate; a thin-film encapsulation layer on the light emitting element layer; a wavelength conversion layer on the thin-film encapsulation layer; a binding member on the wavelength conversion layer and comprising an epoxy group; an opposing substrate facing the substrate; a color filter layer on a surface of the opposing substrate; and an auxiliary layer on the color filter layer and comprising an amine group, wherein the binding member and the auxiliary layer are in contact with each other, and the epoxy group of the binding member and the amine group of the auxiliary layer are chemically bonded to each other.