Green Color Filter Dye for High Transmittance
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Solution Overview
Problem
Current green color filters in LCD devices face challenges with low light transmittance and color purity, requiring improved colorants with high molar extinction coefficients and resistance to thermal, light, and moisture exposure.
Innovation Solution
A photosensitive composition comprising a high-transmissive green dye with specific halogenated metal phthalocyanine structure, combined with a binder resin, cross-linking agent, photopolymerization initiator, and solvent, which enhances light transmittance and color purity by optimizing the molar extinction coefficient and resistance properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a dye with low molar extinction coefficient is used, then the amount of dye required increases, but the light transmittance decreases and curing properties deteriorate
Solution Approach 1:
The patent modifies the chemical structure of the dye by introducing specific substituents (ether groups at predetermined positions) to change its optical parameters, specifically increasing the molar extinction coefficient. This allows achieving the desired light absorption with smaller amounts of dye, thereby improving light transmittance while maintaining effective curing properties.
Solution Approach 2:
The patent creates a composite photosensitive composition by combining the newly developed dye with specific binder resins, crosslinking agents, and photopolymerization initiators. This composite formulation optimizes the overall performance, ensuring high light transmittance, excellent curing properties, and improved thermal resistance simultaneously.
2Reliability
If a pigment is used instead of a dye, then thermal resistance improves, but light transmittance decreases
Solution Approach 1:
The patent develops a novel dye with modified chemical parameters that achieves pigment-like thermal stability while maintaining superior light transmittance. The specific molecular structure with ether substituents provides enhanced thermal resistance without compromising the optical properties, effectively bridging the gap between dye and pigment characteristics.
3Manufacturing precision
If the amount of polymerization compound is reduced to accommodate more dye, then color purity improves, but curing properties deteriorate
Solution Approach 1:
By increasing the molar extinction coefficient of the dye through structural modification, the patent enables achieving high color purity with reduced dye concentration. This leaves sufficient room in the composition for maintaining adequate amounts of polymerization compounds, thus preserving excellent curing properties while achieving high color purity.
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 solution achieves increased light transmittance and improved color purity, leading to enhanced luminance and contrast in display devices, while maintaining thermal and light stability.
Implementation Method 1
a photopolymerization initiator
Implementation Method 2
a high-transmissive green dye with specific halogenated metal phthalocyanine structure, which enhances light transmittance and color purity by optimizing the molar extinction coefficient
Data Source
AI summary
The present disclosure relates to a photosensitive composition for a green color filter. More particularly, the present disclosure relates to a dye for a green color filter which has a high light transmittance; a photosensitive composition including the dye; and a green color filter manufactured using the photosensitive composition.