Photosensitive Resin Composition for Color Filters
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Solution Overview
Problem
Conventional color filters using triarylmethane compounds exhibit insufficient solubility, heat resistance, and light resistance due to the limitations of existing dyes, which affect the luminance and chemical resistance of the color filter.
Innovation Solution
A photosensitive resin composition comprising a specific cation and anion, represented by Chemical Formula 1, is used, which includes a dye with a maximum absorbance in the 600-700 nm range and high molar extinction coefficient, providing excellent spectral characteristics, heat resistance, light resistance, and chemical resistance, along with high luminance and solubility in organic solvents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional triarylmethane compounds are used as dyes in color filters, then the color filter can be manufactured with existing processes, but the solubility, heat resistance, and light resistance are insufficient
Solution Approach 1:
The patent modifies the molecular structure of triarylmethane compounds by introducing specific substituents (R1-R6 groups) and adjusting the cation-anion configuration to achieve optimal solubility while maintaining heat and light resistance. The dye is designed with specific molecular weight and structural parameters to balance solubility and durability properties.
Solution Approach 2:
The patent creates a composite dye structure consisting of a cation and anion with specific chemical formulas, combining multiple functional groups to achieve both solubility in organic solvents and enhanced heat/light resistance. The composite nature of the dye molecule allows simultaneous optimization of contradictory properties.
2Illumination intensity
If the dye content is increased to improve color characteristics and luminance, then the color filter performance improves, but the production cost increases
Solution Approach 1:
The patent optimizes the dye content to a specific range (15-40 wt%) to achieve high luminance while controlling production costs. This parameter optimization allows sufficient color characteristics without excessive material usage, balancing performance and cost-effectiveness.
3Reliability
If pigment is used instead of dye to improve heat resistance and light resistance, then the durability improves, but the solubility and dispersion uniformity deteriorate
Solution Approach 1:
The patent transitions from using pigment to using specifically designed dye compounds with optimized molecular parameters. The dye structure includes solubilizing groups and appropriate molecular weight to achieve uniform dispersion while maintaining heat and light resistance, eliminating the need for pigment's superior durability at the cost of poor solubility.
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 achieves excellent luminance, heat resistance, light resistance, and chemical resistance in color filters, reducing the unit cost of production while maintaining high color characteristics, even when used in a small amount.
Implementation Method 1
a photopolymerizable compound; a photopolymerization initiator
Implementation Method 2
a dye consisting of a cation and an anion... the dye has a maximum absorbance in the 600-700 nm range
Data Source
AI summary
A photosensitive resin composition, a photosensitive resin film, and a color filter, the composition including a binder resin; a dye consisting of a cation and an anion; a photopolymerizable compound; a photopolymerization initiator, and a solvent, wherein the dye is included in an amount of about 15 wt % to about 40 wt % based on a total weight of a photosensitive resin composition, and wherein the cation is represented by Chemical Formula 1: