Dye Multimer Color Filter Inkjet Resolution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional pigment dispersion methods for producing color filters face challenges such as color unevenness, reduced contrast due to light scattering, and poor heat and light fastness, especially in solid-state image sensors, while dye-based compositions suffer from issues like elution during alkali development, penetration into adjacent layers, and heat-induced color transfer.
Innovation Solution
A colored composition comprising a dye multimer with a weight-average molecular weight of 5,000 to 20,000 and dispersity of 1.00 to 2.50, incorporating an alkali-soluble group, a polymerizable compound, and a solvent, which suppresses elution, penetration, and heat diffusion, and is suitable for forming high-resolution, heat-resistant color filters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pigment dispersion method is used to produce color filters, then light fastness and heat fastness are improved, but resolution is reduced due to color unevenness caused by coarse pigment particles
Solution Approach 1:
The patent changes the fundamental parameter of the coloring material from pigment to dye, and specifically uses a dye multimer with controlled molecular weight (5,000-20,000) and dispersity (1.00-2.50). This parameter change allows the material to be applied by inkjet method achieving high resolution while the multimer structure provides sufficient fastness properties.
Solution Approach 2:
The patent creates a composite coloring system by forming a dye multimer through polymerization of dye monomers. This composite structure combines the high resolution capability of dye-based materials with the fastness properties typically associated with pigments, resolving the contradiction between resolution and reliability.
2Illumination intensity
If conventional dyes are used in colored compositions, then color reproduction is improved, but elution during alkali development and penetration into adjacent layers occur
Solution Approach 1:
The patent changes the molecular weight parameter of the dye to a specific range (5,000-20,000) and controls dispersity (1.00-2.50). This parameter optimization allows the dye to maintain good color reproduction while the higher molecular weight and controlled polydispersity reduce elution and penetration issues compared to conventional low molecular weight dyes.
Solution Approach 2:
The patent introduces an alkali-soluble group as a functional intermediary on the dye multimer structure. This group enables the dye to be properly processed during photolithography development while the multimer structure prevents excessive elution and penetration, balancing color reproduction with compositional stability.
3Manufacturing precision
If dye-based compositions are used instead of pigment dispersion, then resolution is improved, but heat-induced color transfer occurs
Solution Approach 1:
The patent optimizes the molecular weight parameter to 5,000-20,000 and dispersity to 1.00-2.50, which provides sufficient thermal stability to prevent heat-induced color transfer during manufacturing processes like ITO sputtering, while maintaining the high resolution benefits of dye-based materials.
Solution Approach 2:
The patent converts the potential harm of heat exposure during manufacturing into a benefit by using the controlled polymerization of dye monomers. The resulting dye multimer structure with specific molecular weight and dispersity actually improves heat resistance compared to conventional dyes, turning the heat exposure challenge into an opportunity to achieve both high resolution and thermal stability.
4Productivity
If inkjet method is used to produce color filters, then productivity is improved, but nozzle clogging occurs due to coagulation of pigment
Solution Approach 1:
The patent changes the coloring material from pigment to dye multimer with molecular weight 5,000-20,000 and dispersity 1.00-2.50. This parameter change eliminates coagulation issues that cause nozzle clogging in pigment-based inkjet inks, enabling stable discharge and maintaining high productivity through the inkjet method.
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 enables the production of color filters with improved heat fastness, discharge stability, and reduced color mixing, enhancing the performance of both liquid crystal displays and solid-state image sensors by preventing elution, penetration, and heat-induced color transfer.
Implementation Method 1
have favorable spectral characteristics in terms of color reproduction; have a large molar absorbance coefficient
Implementation Method 2
a colored curable composition in which a pigment is dispersed in a curable composition by photolithography
Data Source
AI summary
The invention provides a colored composition including a dye multimer having an alkali-soluble group as a dye, the dye multimer having a weight-average molecular weight (Mw) of from 5,000 to 20,000 and a dispersity (weight-average molecular weight (Mw) / number-average molecular weight (Mn)) of from 1.00 to 2.50.