Curable Quantum Dot Resin Layer for Display Devices
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Solution Overview
Problem
Existing methods for manufacturing color filters, such as pigment dispersion and inkjet printing, face challenges in reducing curing shrinkage rates and improving luminance, particularly when using quantum dots, which can lead to surface omissions and cracking in the resin layer, and limited color characteristics.
Innovation Solution
A curable composition incorporating a quantum dot, a binder resin with specific structural units including acrylate and thioaryl groups, and a solvent, which minimizes curing shrinkage and enhances luminance by reducing intermolecular free volume and improving quantum dot dispersion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If quantum dots are used in the curable composition, then luminance is improved, but curing shrinkage rate increases causing surface omissions and cracking
Solution Approach 1:
The patent changes the chemical composition parameters of the binder resin by incorporating specific structural units (Formula 1-1 to 1-3 and Formula 2) that modify the curing behavior. This parameter change reduces the curing shrinkage rate while maintaining quantum dot dispersion, thereby preventing surface omissions and cracking while preserving luminance enhancement
Solution Approach 2:
The patent creates a composite curable composition combining quantum dots with a specially designed binder resin system. The binder resin comprises multiple structural units (acrylate groups in Formula 1-1 to 1-3 and thioaryl groups in Formula 2) that work synergistically to reduce curing shrinkage and improve compatibility with quantum dots, resolving the contradiction between luminance improvement and surface quality
2Reliability
If pigment dispersion method is used, then heat resistance and durability are improved, but process complexity and yield management difficulty increase
Solution Approach 1:
The patent merges the advantages of pigment dispersion (heat resistance, durability) with the simplicity of inkjet printing by using a curable composition that can be applied in a single step. The binder resin system maintains the thermal stability and durability characteristics while enabling direct patterning without multiple coating, exposure, development, and curing steps
Solution Approach 2:
The patent changes the chemical parameters of the coloring material from traditional pigments to quantum dots dispersed in a specially formulated binder resin. This parameter change maintains heat resistance and durability while simplifying the manufacturing process by eliminating the need for separate coating, exposure, and development steps
3Illumination intensity
If multiple pigments are mixed for color filter manufacturing, then color characteristics are improved, but material cost and process complexity increase
Solution Approach 1:
The patent changes the fundamental parameter of color generation from pigment mixing to quantum dot size-dependent emission. By controlling quantum dot size and composition, precise color characteristics are achieved without needing to mix multiple pigments, thereby simplifying the formulation and reducing material cost while maintaining excellent color 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 composition effectively reduces curing shrinkage, prevents surface omissions and cracking, and enhances luminance by optimizing the binder resin's molecular structure and quantum dot dispersion, leading to improved patterning and color reproducibility in display devices.
Implementation Method 1
capable of minimizing or reducing curing shrinkage rate during a thermal process
Implementation Method 2
A curable composition including a quantum dot
Data Source
AI summary
A curable composition includes: (A) a quantum dot; (B) a binder resin including a structural unit represented by Chemical Formula 1-1, a structural unit represented by Chemical Formula 1-2, a structural unit represented by Chemical Formula 1-3, and a structural unit represented by Chemical Formula 2; and (C) a solvent. A resin layer is manufactured using the curable composition, and a display device includes the resin layer.