Light Absorptive Compound for Blue Light Cutting
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Solution Overview
Problem
Existing light-absorbing agents for display devices have poor solubility in solvents and affinity with hydrophobic substances, leading to inadequate light absorption and surface bleeding, especially around the 400 nm wavelength, which affects the durability and color expression of display elements.
Innovation Solution
A compound represented by formula (I) with specific structural components, such as a methylene group, secondary amino group, or sulfur atom, is developed, which is excellent in solubility in various solvents and affinity with hydrophobic substances, forming a polymer composition that can be used in optical films and pressure-sensitive adhesives to selectively absorb light around 400 nm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a light absorbing agent is added to a protection film to prevent deterioration from UV rays, then the light resistance of display devices is improved, but the solubility of the light absorbing agent in solvents is insufficient causing surface bleeding
Solution Approach 1:
The patent modifies the chemical structure of the light absorbing agent by introducing specific functional groups (carboxyl group, hydroxyl group, or amino group) and controlling molecular weight parameters to achieve both effective UV absorption and sufficient solubility in common solvents, preventing surface bleeding while maintaining light resistance
Solution Approach 2:
The patent creates a composite light absorbing agent structure combining a core absorbing moiety with solubilizing side chains or functional groups, allowing the material to simultaneously exhibit strong UV absorption properties and good solubility characteristics in various solvents
2Object-affected harmful factors
If a light absorbing agent is added to achieve blue light cutting function, then the blue light cutting performance is improved, but the solubility in pressure-sensitive adhesive or solvent is insufficient causing bleeding during heating and stretching
Solution Approach 1:
The patent optimizes molecular weight parameters and introduces specific functional groups (carboxyl, hydroxyl, or amino groups) to enhance both blue light cutting capability and solubility stability, ensuring the agent remains dissolved during processing operations like heating and stretching
Solution Approach 2:
The patent uses solvent molecules as intermediaries that interact with the light absorbing agent through improved solubility parameters, allowing the agent to remain uniformly dissolved in the pressure-sensitive adhesive or solvent during processing and application
3Object-affected harmful factors
If a light absorbing agent is used to absorb light around 400 nm for blue light cutting, then the blue light cutting function is improved, but the affinity with hydrophobic substances is insufficient reducing effectiveness
Solution Approach 1:
The patent modifies the chemical structure by introducing hydrophobic character through specific functional groups and molecular weight control, enhancing the affinity with hydrophobic substances while maintaining the ability to absorb light around 400 nm for effective blue light cutting
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 compound effectively enhances the blue light cutting function and light resistance of display elements by stable absorption of light around 400 nm, preventing surface bleeding and maintaining optical performance.
Implementation Method 1
a light absorptive compound which is capable of selectively absorbing light around a wavelength of 400 nm
Data Source
AI summary
The object of the present invention is to provide a light absorptive compound which is capable of selectively absorbing light around a wavelength of 400 nm, and is excellent in solubility in various solvents and/or affinity with hydrophobic substances. Also, the object of the present invention is to provide an optical film containing such a light absorptive compound, and a cured layer. A compound represented by the following formula (I):