Color Filter Dispersion Liquid for High Luminance and Heat Resistance
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Solution Overview
Problem
Current color filters for liquid crystal and organic light-emitting displays face challenges in achieving high luminance with excellent heat and light resistance, as existing resin compositions either lack sufficient resistance or result in poor performance due to issues with pigment or dye-based materials.
Innovation Solution
A color material dispersion liquid containing a specific cation and polyoxometalate anion, where molybdenum and tungsten are present in a polyoxometalate anion with a controlled molar ratio, is used to form a coating film with high luminance, heat resistance, and light resistance, utilizing a polymer dispersant and ester solvent for improved stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If dyes are used as color material to achieve high luminance, then luminance is improved, but heat resistance and light resistance deteriorate
Solution Approach 1:
The invention uses a composite color material comprising both a dye component and a pigment component. The dye provides high luminance while the pigment provides heat and light resistance. This composite approach allows the color filter to achieve high luminance (from the dye) while maintaining excellent heat and light resistance (from the pigment), thereby resolving the contradiction between luminance and reliability.
2Reliability
If pigments are used as color material to improve heat resistance, then heat resistance is improved, but luminance deteriorates
Solution Approach 1:
The invention employs a composite color material system where pigment and dye are combined in specific proportions. The pigment component ensures heat resistance and light resistance, while the dye component contributes high luminance. By optimizing the composition ratio, the invention achieves both high heat resistance (from pigment) and high luminance (from dye), resolving the contradiction between reliability and illumination intensity.
3Stability of the object's composition
If polysiloxane dye is used to achieve cross-linking, then structural stability is improved, but solubility and dispersion stability deteriorate
Solution Approach 1:
The invention extracts the essential function of cross-linking stability from the polysiloxane dye while eliminating its harmful effects on solubility and dispersion. Instead of using polysiloxane dye, the invention employs a composite system where the pigment component provides structural stability and the dye component maintains solubility and dispersion stability. This separation of functions resolves the contradiction between structural stability and ease of operation.
Data Source
AI summary
An object of the present invention is to provide: a color material dispersion liquid which is able to form a coating film with high luminance, excellent heat resistance and excellent light resistance. Disclosed is a color material dispersion liquid comprising a color material represented by the following general formula (I), a specific dispersant, and a specific solvent, wherein molybdenum and tungsten are contained in a polyoxometalate anion in the color material, and a molar ratio between the molybdenum and the tungsten is 0.4:99.6 to 15:85:(Symbols shown in the general formula (I) are described in the Description.)