Dye Multimer Coloring Composition for Color Filter Light Fastness
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing coloring compositions for color filters face challenges in achieving good exposure sensitivity and light fastness while maintaining stability against heat and light, with issues like light scattering and color unevenness, particularly in the context of solid-state imaging devices.
Innovation Solution
A coloring composition incorporating a dye multimer with a specific colorant structure and a photostable group within the same molecule, combined with a curable compound, such as a polyfunctional polymerizable monomer, to enhance exposure sensitivity and light fastness, and potentially including a polymerization initiator, acid group, or polymerizable group.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pigment dispersion method is used to manufacture color filters, then heat resistance and light fastness are improved, but light scattering and color unevenness occur
Solution Approach 1:
The patent changes the physical state of the coloring agent from particulate (pigment) to molecular (dye), and further modifies the dye by introducing polymerizable groups and photostabilizer structures. This transforms the dye into a dye multimer that can be cured to form a crosslinked structure, thereby improving both color uniformity and environmental stability simultaneously
Solution Approach 2:
The patent creates a composite structure by combining multiple functional components within the dye multimer molecule itself: the colorant structure provides coloring, the polymerizable groups enable crosslinking for heat resistance, and the photostabilizer structures prevent light-induced degradation. This multi-functional composite approach resolves the contradiction between color uniformity and environmental stability
2Manufacturing precision
If a dye is used as color material to suppress light scattering, then color uniformity is improved, but heat resistance and light fastness deteriorate
Solution Approach 1:
The patent fundamentally changes the molecular structure of the dye by incorporating polymerizable functional groups and photostabilizer moieties directly into the dye molecule. This structural modification enables the dye to undergo photo-curing and form a crosslinked network, transforming it from a simple organic dye with poor stability to a crosslinked polymer structure with excellent heat and light resistance while maintaining color uniformity
Solution Approach 2:
The patent introduces photostabilizer structures as intermediary components within the dye multimer that act as mediators between the colorant and environmental factors. These photostabilizer groups absorb and dissipate energy from UV and visible light, preventing direct degradation of the colorant chromophores, thereby maintaining both color uniformity and light fastness
3Reliability
If heating treatment is performed after film formation to improve light fastness, then light fastness is improved, but color transfer among adjacent patterns occurs
Solution Approach 1:
The patent performs preliminary action by incorporating photostabilizer structures and polymerizable groups into the dye multimer before film formation. The photostabilizer groups are pre-positioned within the molecular structure to provide immediate protection against light-induced degradation, eliminating the need for post-formation heating treatment that would cause color transfer
Solution Approach 2:
The patent replaces the thermal curing mechanism (heating treatment) with a photo-curing mechanism. The polymerizable groups in the dye multimer undergo polymerization upon exposure to actinic light, forming a crosslinked structure at room or low temperature. This substitution of thermal process with photochemical process prevents color transfer while achieving excellent light fastness
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 effectively improves exposure sensitivity and light fastness of the cured film, reduces development residues, and maintains compatibility, enabling the formation of thin films with precise colored patterns suitable for small pixel sizes in solid-state imaging devices.
Implementation Method 1
a photostable group having a structure that absorbs energy from UV light, visible light, or heat
Implementation Method 2
a polymerizable group having a structure that undergoes polymerization or crosslinking when exposed to actinic light
Data Source
AI summary
A coloring composition having good light fastness and exposure sensitivity in the case of preparing a cured film; and a cured film, a color filter, a pattern forming method, a method for manufacturing a color filter, a solid-state imaging device, an image display device, and a dye multimer, each using the coloring composition, are provided. The coloring composition contains a dye multimer having a colorant structure and at least one structure selected from structures of Formulas (1) to (5) in the same molecule (Formula (1) is shown below), and a curable compound: