Light Absorption Filter Room-Temperature Decolorization
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Solution Overview
Problem
Existing light absorption filters require heating during ultraviolet irradiation to achieve decolorization, and they can exhibit secondary absorption issues associated with dye decomposition, which affects their productivity and performance.
Innovation Solution
A light absorption filter comprising a resin, a compound with an acid group, a compound that forms a hydrogen bond and generates a radical upon ultraviolet irradiation, and a dye with a main absorption wavelength band in the 400 to 700 nm range, specifically using a squarine-based coloring agent, which is chemically bonded to the polymer and decolorized upon UV exposure, minimizing secondary absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heating is applied during ultraviolet irradiation to achieve decolorization, then the decolorization effect is improved, but the productivity and energy efficiency deteriorate due to the need for additional heating processes
Solution Approach 1:
The patent changes the chemical parameters of the light absorption filter by incorporating specific compounds (compounds of formula 1 and compounds of formula 2) that enable decolorization to occur at room temperature during UV irradiation, eliminating the need for heating and thus improving productivity while maintaining decolorization effectiveness
Solution Approach 2:
The patent replaces the thermal mechanism (heating) with a photochemical mechanism (UV-induced radical generation). The compounds of formula 2 generate radicals upon UV irradiation that directly facilitate decolorization without requiring thermal energy, substituting a mechanical/thermal process with a photochemical one
2Reliability
If heating is applied during ultraviolet irradiation to achieve decolorization, then the decolorization effect is improved, but the energy consumption increases due to additional heating requirements
Solution Approach 1:
The patent changes the operational parameters from requiring elevated temperatures to operating at room temperature by using UV-sensitive compounds that generate radicals upon light exposure, thereby reducing energy consumption while achieving the same decolorization effect
Solution Approach 2:
The patent substitutes thermal energy input with photochemical energy input. The compounds of formula 2 absorb UV energy and convert it directly into chemical action through radical generation, eliminating the need for separate heating energy input
3Reliability
If conventional light absorption filters are used, then light absorption is achieved, but secondary absorption occurs due to dye decomposition upon ultraviolet irradiation
Solution Approach 1:
The patent introduces compounds of formula 2 as intermediaries that generate radicals upon UV irradiation. These radicals act as mediators to facilitate the decolorization process and prevent direct dye decomposition, thereby eliminating secondary absorption while maintaining light absorption properties through the controlled action of the intermediary compounds
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 enables excellent decolorization at room temperature with reduced secondary absorption, improving the productivity and performance of the filter by maintaining effective light absorption properties without the need for heating.
Implementation Method 1
a compound B that forms a hydrogen bond with the acid group contained in the compound A and generates a radical upon ultraviolet irradiation
Implementation Method 2
irradiating with an ultraviolet ray
Data Source
AI summary
A light absorption filter containing a resin, a compound A having an acid group, a compound B that forms a hydrogen bond with the acid group contained in the compound A and generates a radical upon ultraviolet irradiation, and a dye having a main absorption wavelength band in a wavelength range of 400 to 700 nm. There is also an optical filter that uses the light absorption filter and a manufacturing method for the optical filter, as well as an organic electroluminescent display device, an inorganic electroluminescent display device, or a liquid crystal display device, which includes the optical filter.