Quantum-Dot Color Conversion Panel With Low-Refractive Layer
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Solution Overview
Problem
Existing color conversion panels face challenges in achieving high luminous efficiency due to light loss and difficulties in processing low refractive index materials, particularly with thermosetting materials requiring high-temperature baking and expensive hollow particles causing scattering issues.
Innovation Solution
A color conversion panel design incorporating a substrate, a color conversion layer with quantum dots, a low refractive layer composed of a polymer matrix and hollow particles, and a planarization layer, where the low refractive layer has a refractive index of less than 1.32 and high light transmittance, formed through a hydrolysis-condensation reaction of specific silicone-based polymers and including hollow metal oxide particulates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If thermosetting low refractive index material is used, then low refractive index is achieved, but high-temperature baking process is required
Solution Approach 1:
The patent changes the chemical composition parameters of the low refractive index material from thermosetting to thermoplastic polymer base, enabling the material to achieve low refractive index properties without requiring high-temperature baking processes. This parameter change transforms the manufacturing conditions from high-temperature curing to lower-temperature processing.
Solution Approach 2:
The patent employs a thermoplastic polymer-based low refractive index material that can be processed and discarded more easily compared to thermosetting materials. The material allows for simpler manufacturing processes and can be reprocessed if needed, reducing manufacturing complexity and waste.
2Temperature
If vapor deposition method is used, then low refractive index is achieved, but low-refractive properties are difficult to obtain
Solution Approach 1:
The patent creates a composite low refractive index material by combining thermoplastic polymer base with specific additives and fillers. This composite approach allows precise control of the refractive index property while maintaining ease of manufacturing, achieving both low refractive index and high manufacturing precision simultaneously.
3Temperature
If hollow particles are used, then low refractive index is achieved, but scattering occurs in etch and patterning processes
Solution Approach 1:
The patent replaces expensive and problematic hollow particles with a thermoplastic polymer-based material system that achieves low refractive index without the scattering issues. This substitution eliminates the harmful scattering effect during etch and patterning processes while maintaining the desired optical properties.
Solution Approach 2:
The patent changes the material parameters from hollow particle-based to thermoplastic polymer-based low refractive index material. This parameter change fundamentally alters the material's interaction with light and processing chemicals, eliminating scattering problems during subsequent fabrication steps.
4Length of stationary object
If coating layer refractive index is lowered, then coating layer thickness is decreased, but manufacturing complexity increases
Solution Approach 1:
The patent changes the base material parameters to thermoplastic polymer, which enables the formation of ultra-thin low refractive index coating layers through simpler deposition processes. This parameter change allows thickness reduction without proportionally increasing manufacturing complexity, as the thermoplastic material is more easily processed into thin films.
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 design significantly enhances luminous efficiency by reducing light reflection and increasing light transmittance, improving optical properties and maintaining durability through the use of a low refractive index layer and planarization layer.
Implementation Method 1
the low refractive layer includes a polymer matrix and hollow particles dispersed in the polymer matrix... The low refractive layer has a refractive index of less than 1.32
Implementation Method 2
the polymer matrix may include a silicone-based polymer formed by a hydrolysis-condensation reaction of a compound represented by Chemical Formula 1 and/or a compound represented by Chemical Formula 2
Implementation Method 3
the polymer matrix may include a silicone-based polymer formed by a hydrolysis-condensation reaction
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A color conversion panel includes a substrate, a color conversion layer disposed on the substrate and including a color conversion member, a low refractive layer disposed between the substrate and the color conversion layer, disposed on the color conversion layer, or disposed between the substrate and the color conversion layer and disposed on the color conversion layer, and a planarization layer covering the low refractive layer and the color conversion layer, wherein the color conversion member includes quantum dots and the low refractive layer includes a polymer matrix and hollow particles dispersed in the polymer matrix.