Color Filter Substrate with Surface-Modified Metal Particles
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Solution Overview
Problem
Current display technologies face challenges in achieving high luminance and economical efficiency in color filter substrates for display panels, particularly in the dispersion of metal particles within color filters, which often require leveling agents.
Innovation Solution
A color filter substrate with surface-modified metal particles, including silver particles of varying diameters for blue, green, and red filters, eliminates the need for leveling agents by using hydrocarbon compounds to enhance particle dispersibility, thereby improving luminance and processability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If metal particles are used in color filters to enhance luminance, then luminance and color intensity are improved, but particle aggregation occurs and dispersibility deteriorates
Solution Approach 1:
A leveling agent comprising a specific compound (with molecular weight 100-500, containing aromatic hydrocarbon group and heteroatom) is introduced as an intermediary substance between metal particles and the resin matrix. This leveling agent adsorbs onto the metal particle surfaces and provides steric or electrostatic repulsion, preventing aggregation while improving dispersibility throughout the color filter layer.
Solution Approach 2:
The invention changes the chemical and physical parameters of the dispersing system by selecting a leveling agent with specific molecular weight (100-500), specific functional groups (aromatic hydrocarbon and heteroatom), and specific structural characteristics. These parameter changes optimize the interaction between the leveling agent and metal particles, achieving both good dispersibility and aggregation prevention.
2Stability of the object's composition
If traditional leveling agents are used to improve particle dispersibility, then dispersibility is enhanced, but manufacturing cost increases and process complexity increases
Solution Approach 1:
The invention optimizes the molecular weight parameter of the leveling agent to a specific range (100-500), which balances dispersing effectiveness with ease of handling and processing. This parameter optimization allows for simplified manufacturing processes while maintaining excellent particle dispersibility, reducing both cost and process complexity.
Solution Approach 2:
The leveling agent is designed as a composite molecular structure combining aromatic hydrocarbon groups (for hydrophobic interaction with metal particles) and heteroatoms (for polar interactions and steric stabilization). This composite structure provides multifunctional performance in a single additive, simplifying the formulation and manufacturing process.
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 increases luminance by optimizing photon scattering and absorption ratios, enhancing fluorescence intensity, and provides an economical advantage by eliminating the need for traditional leveling agents.
Implementation Method 1
increases luminance by optimizing photon scattering and absorption ratios
Implementation Method 2
increases luminance by optimizing photon scattering and absorption ratios
Implementation Method 3
surface-modified metal particles including metal particles and a hydrocarbon compound surface modification layer covering the metal particles
Implementation Method 4
enhancing fluorescence intensity
Data Source
AI summary
A color filter substrate comprises an insulating substrate and a color filter layer including a blue color filter and a green color filter spaced apart from each other on the insulating substrate, wherein the blue color filter includes first metal particles having a first mean diameter, and the green color filter includes second metal particles having a second mean diameter larger than the first mean diameter.