Wavelength Conversion Member Dispersibility via Mediator Compound
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Solution Overview
Problem
The dispersibility of inorganic particles in polymerizable compositions containing quantum dots and polymerizable compounds is low, leading to decreased luminance in wavelength conversion members.
Innovation Solution
A polymerizable composition comprising quantum dots, a polymerizable compound with (meth)acryloyl or (meth)allyl groups, and inorganic particles, along with a compound represented by General Formula (1), which enhances the solubility and dispersibility of inorganic particles, improving the luminance of the wavelength conversion member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If inorganic particles are added to polymerizable composition to improve luminance, then luminance is improved, but dispersibility of inorganic particles decreases leading to aggregation and reduced performance
Solution Approach 1:
The patent introduces a dispersant as an intermediary substance that mediates between inorganic particles and the polymerizable composition. The dispersant contains specific functional groups that interact with both the inorganic particles and the polymer matrix, enabling stable dispersion. This resolves the contradiction by providing a bridging mechanism that maintains both high luminance (through adequate inorganic particle content) and good dispersibility (through the dispersant's mediating action).
Solution Approach 2:
The patent modifies the chemical parameters of the polymerizable composition by incorporating functional groups (such as carboxyl, hydroxyl, or amino groups) that can interact with inorganic particles. By changing the chemical composition parameters and adding specific additives with controlled molecular structures, the patent achieves improved wetting and dispersion of inorganic particles while maintaining high luminance output.
2Manufacturing precision
If quantum dots are used in wavelength conversion member to achieve high color reproducibility, then color reproducibility is improved, but manufacturing complexity increases
Solution Approach 1:
The patent combines multiple functions into a single integrated wavelength conversion member. By incorporating quantum dots, inorganic particles, and polymerizable compounds into one composite material system that can be processed in a single curing step, the patent achieves high color reproducibility while reducing manufacturing complexity. The merging of wavelength conversion, dispersion, and structural functions into one material eliminates the need for separate processing steps.
Solution Approach 2:
The patent employs composite material science by creating a multi-component polymerizable composition that integrates quantum dots, inorganic particles, dispersants, and polymerizable compounds. This composite approach allows simultaneous achievement of high color reproducibility (from quantum dots), improved dispersibility (from inorganic particles and dispersants), and simplified processing (through single-step curing), thereby resolving the contradiction between performance and 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 composition effectively increases the dispersibility of inorganic particles, enhancing the luminance and color reproducibility of the wavelength conversion member, achieving high solubility and stability in the polymerizable compound.
Implementation Method 1
the quantum dots are excited by the incident light to emit fluorescence
Implementation Method 2
by using quantum dots having different light emission characteristics, each bright line light of red light, green light, and blue light can be emitted from the wavelength conversion member as fluorescence emitted from the quantum dots
Data Source
AI summary
A polymerizable composition including quantum dots, a polymerizable compound containing one or more polymerizable groups selected from the group consisting of a (meth)acryloyl group and a (meth)allyl group in one molecule, inorganic particles having an average particle diameter of 0.10 μm or more, and a compound represented by General Formula (1)In General Formula (1), P1 represents a polymer structure having an I/O value of 0.250 or more and 1.650 or less.