Titanium Nitride Black Resin for High OD Color Filters
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional resin black matrices for liquid crystal displays face challenges in achieving high optical density (OD) values while maintaining adhesion and resistance, leading to issues with flatness and alignment due to increased surface steps and peeling problems.
Innovation Solution
A black resin composition using titanium nitride compound particles with specific properties, including a diffraction angle of 42.5° to 42.8°, crystallite size of not more than 50 nm, and a specific surface area of 5 to 100 m2/g, is employed as a light shielding agent, enhancing adhesion and resistance without increasing film thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the resin black matrix is made thicker to achieve higher OD value, then the light shielding performance is improved, but the flatness of the color filter deteriorates due to increased surface steps
Solution Approach 1:
The patent changes the physical and chemical parameters of the light shielding material by using titanium nitride compound particles with specific properties (diffraction angle 42.5° to 42.8°, crystallite size not more than 50 nm, specific surface area 5 to 100 m2/g). These parameter changes enable achieving higher OD values with thinner film thickness, thereby resolving the contradiction between light shielding performance and flatness.
2Illumination intensity
If the volume ratio of light shielding agent is increased to achieve higher OD value and thinner film, then the adhesion of the resin black matrix to glass decreases and the matrix is peeled off
Solution Approach 1:
The patent uses titanium nitride compound particles with specifically controlled parameters (crystallite size not more than 50 nm, specific surface area 5 to 100 m2/g) that provide both high light shielding efficiency and good adhesion properties, resolving the contradiction between achieving thin high-OD films and maintaining adhesion to glass substrates.
3Illumination intensity
If the volume ratio of light shielding agent is increased to achieve higher OD value and thinner film, then the resistance of the resin black matrix decreases
Solution Approach 1:
The patent employs titanium nitride compound particles with optimized parameters (crystallite size not more than 50 nm, specific surface area 5 to 100 m2/g) that maintain sufficient resistance even when the resin content is reduced, thereby resolving the contradiction between achieving thin high-OD films and maintaining electrical resistance.
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 results in a thin, high-OD resin black matrix with improved adhesion and resistance, enabling higher display performance and flatness without the need for an over-coat, thereby enhancing the overall display quality.
Implementation Method 1
a black resin composition comprising at least a light shielding agent, a resin and a solvent, the light shielding agent containing at least titanium nitride compound particles
Implementation Method 2
the angle of diffraction 2θ of the peak originated from (200) plane of the titanium nitride compound particles when CuKα line is used as the X-ray source is not less than 42.5° and not more than 42.8°
Data Source
AI summary
A black resin composition capable of forming a black matrix having high OD value and high adhesion as well as high resistance is disclosed. The black resin composition is a black resin composition comprising at least a light shielding agent, a resin and a solvent, which light shielding agent contains at least titanium nitride compound particles, wherein the angle of diffraction 2θ of the peak originated from (200) plane of the titanium nitride compound particles when CuKα line is used as the X-ray source is not less than 42.5° and not more than 42.8°. Using this black resin composition allows a thin resin black matrix having a high light shielding property and high resistance to be readily attained.