Colored Dispersion for Black Matrix Light Shielding
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Solution Overview
Problem
Conventional black matrix compositions for large-scale TVs face challenges in maintaining dispersion stability, adhesion to substrates, and process margin due to high carbon black content, leading to increased viscosity and reduced productivity.
Innovation Solution
A colored dispersion using a binder resin with specific monomers, combined with a dispersing agent and pigment, is developed to enhance light-shielding properties while maintaining dispersion stability and improving adhesion and photosensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the content of carbon black is increased to improve light-shielding property, then light-shielding property is improved, but viscosity increases and dispersion stability deteriorates
Solution Approach 1:
The patent introduces a specific binder resin containing polyfunctional monomers as an intermediary substance between carbon black particles and the composition matrix. This binder resin with multiple functional groups effectively binds carbon black particles, preventing aggregation and maintaining dispersion stability even at high carbon black content (30-60 wt%), thereby resolving the contradiction between light-shielding property and dispersion stability.
Solution Approach 2:
The patent creates a composite photoresist composition system combining carbon black pigment, specific binder resin containing polyfunctional monomers, and other components. This composite approach allows the system to achieve both high light-shielding property through high carbon black content and stable dispersion through the synergistic interaction of multiple components, particularly the polyfunctional monomer-based binder resin.
2Illumination intensity
If the content of carbon black is increased to improve light-shielding property, then light-shielding property is improved, but process characteristic deteriorates
Solution Approach 1:
The binder resin containing polyfunctional monomers acts as a mediator that maintains process characteristics despite high carbon black content. The polyfunctional monomers provide adequate solubility and reactivity, ensuring the composition can be properly applied and processed while achieving high light-shielding property.
Solution Approach 2:
The patent changes key parameters of the composition system by introducing binder resin with specific polyfunctional monomers (containing both hydroxyl groups and carboxylic acid groups). This parameter change in the chemical structure of the binder enables the system to maintain appropriate viscosity and processability even with 30-60 wt% carbon black content.
3Illumination intensity
If the content of carbon black is increased to improve light-shielding property, then light-shielding property is improved, but adhesion to substrate deteriorates
Solution Approach 1:
The patent develops a composite photoresist composition where the binder resin containing polyfunctional monomers provides adhesion-promoting functional groups. These groups (hydroxyl and carboxylic acid) can interact with the substrate surface, ensuring good adhesion even when carbon black content is high and would otherwise compromise film strength and adhesion.
4Illumination intensity
If the content of carbon black is increased to improve light-shielding property, then light-shielding property is improved, but photosensitivity decreases
Solution Approach 1:
The patent changes the chemical parameters of the binder resin by incorporating polyfunctional monomers with specific functional groups. These monomers provide adequate solubility and photoreactivity, maintaining photosensitivity in the composition even at high carbon black content where light absorption would otherwise be excessive.
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 stable dispersion, improved adhesion, and increased photosensitivity, ensuring high light-shielding properties and wide process margins, thus addressing the limitations of conventional compositions.
Implementation Method 1
a colored dispersion comprising: a binder resin including monomers represented by the following formulas 1 to 4, and a dispersing agent and a pigment
Implementation Method 2
a photoresist composition including the same and a black matrix prepared by using the same
Data Source
AI summary
A colored dispersion according to the present invention comprises a resin including monomers of Formulas 1 to 4, as a binder resin.Accordingly, a photoresist composition for a black matrix of a high light shielding property, which has the dispersion stability of the colored dispersion according to the present invention, could be provided, and a black matrix of high sensibility having an uniform process characteristic while maintaining a high light-shielding property could be produced.