Optical Layered Body Antistatic Resin Layer UV Resistance
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Solution Overview
Problem
Existing optical layered bodies for image display devices face challenges in maintaining high image contrast while ensuring ultraviolet resistance and oxidation resistance, as well as stability and physical properties like hardness and light transmittance, due to limitations with antistatic agents such as inorganic and organic conductive materials.
Innovation Solution
An optical layered body comprising a light transmitting substrate with a resin layer containing a binder resin, polythiophene, an auxiliary conductive agent, and a leveling agent, where the polythiophene is present in a specific weight ratio and includes an anionic compound, and the auxiliary conductive agent is chain-like metal oxide particles or carbon nanotubes, forming an electric communication network for improved conductivity and resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inorganic conductive materials (metal oxides) are used as antistatic agents, then antistatic property is improved, but light transmittance and image contrast are reduced
Solution Approach 1:
The patent changes the material parameter from inorganic conductive materials to organic conductive polymers, fundamentally altering the optical and electrical properties of the antistatic layer. This parameter change enables simultaneous achievement of high antistatic performance and high light transmittance, as organic polymers can be formulated to be transparent while maintaining conductivity through dopant incorporation.
Solution Approach 2:
The patent employs composite material structure by combining conductive polymer matrices with dopant particles or molecules. This composite approach allows the antistatic layer to achieve both optical transparency and electrical conductivity through the synergistic interaction between the polymer base and conductive dopants, resolving the contradiction between antistatic property and light transmittance.
2Reliability
If polythiophene is used as conductive polymer, then antistatic property is improved, but ultraviolet resistance and oxidation resistance are insufficient
Solution Approach 1:
The patent applies local quality by introducing specific functional groups or substituents at particular positions on the polythiophene chain. By modifying specific local regions of the polymer structure with electron-withdrawing or sterically protective groups, the patent enhances UV and oxidation resistance without compromising the overall antistatic functionality of the polythiophene backbone.
Solution Approach 2:
The patent changes the chemical structure parameters of polythiophene by introducing substituted variants with enhanced stability. This includes modifying the polymer backbone or side chains with groups that provide UV absorption or oxidation resistance, thereby transforming the material parameters to achieve both antistatic property and environmental stability.
3Reliability
If high addition amount of inorganic antistatic materials is used, then antistatic property is improved, but light transmittance and image contrast are reduced
Solution Approach 1:
The patent changes the concentration parameter by using organic conductive polymers that achieve sufficient conductivity at much lower addition amounts compared to inorganic materials. This parameter change in material type enables high antistatic performance with minimal impact on optical properties, as organic polymers can be formulated to be transparent even at low concentrations.
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 provides an optical layered body with enhanced antistatic properties, high image contrast, and stability in ultraviolet and oxidation resistance, maintaining conventional physical and optical characteristics, suitable for large-scale image display devices.
Implementation Method 1
the auxiliary conductive agent is chain-like metal oxide particles or carbon nanotubes, forming an electric communication network for improved conductivity and resistance
Implementation Method 2
stability in ultraviolet and oxidation resistance
Data Source
AI summary
The present invention provides an optical layered body which stably keeps light resistance such as ultraviolet resistance and oxidation resistance while keeping conventional physical properties and optical properties as the outermost surface material of an image display device, which is excellent in an antistatic property and which is capable of providing high image contrast when employed for an image display device. The optical layered body has a light transmitting substrate and a resin layer formed on one surface of the light transmitting substrate and is characterized in that the resin layer contains a binder resin, a polythiophene, an auxiliary conductive agent, and a leveling agent.