Fluorescent Resin Composition for Light-Resistant Color Conversion Films

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Solution Overview

Problem

Existing LED technologies face challenges in color gamut control, with methods using quantum dots having safety issues, stability problems, and high production costs, while compounds with BF2 or B(CN)2-based bodipy structures lack sufficient light and heat resistance for commercial use.

Innovation Solution

A compound represented by Chemical Formula 1, which includes specific substituents and bonds, is used in a photoresist fluorescent resin composition to create a color conversion film with improved color reproduction, solubility, and high light resistance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If quantum dots are used to obtain green and red colors, then color gamut is improved, but safety problems and stability issues occur

Engineering Contradiction:

ImprovestabilityVSAvoidsafety problems

Core Design Contradiction:

Stability of the object's compositionVSObject-affected harmful factors

Solution Approach 1:

The patent replaces quantum dots with organic fluorescent compounds that can be easily synthesized and disposed of, eliminating the safety and stability issues of quantum dots while maintaining color conversion functionality

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The patent uses composite organic fluorescent compounds with specific molecular structures (combining rigid and flexible groups) to achieve both stability and safety, avoiding the harmful elements in quantum dots

Inventive Principle:

Principle #40Composite materials

2Stability of the object's composition

If quantum dots are used to obtain green and red colors, then color gamut is improved, but production costs increase

Engineering Contradiction:

Improvecolor gamutVSAvoidproduction costs

Core Design Contradiction:

Stability of the object's compositionVSEase of manufacture

Solution Approach 1:

The patent employs organic fluorescent compounds that are cheaper to produce than quantum dots, using readily available starting materials and simpler synthesis procedures, thereby reducing production costs while maintaining color gamut

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The patent optimizes molecular structure parameters (substituent groups, conjugation length) to tune emission wavelengths and improve color gamut without increasing production complexity or cost

Inventive Principle:

Principle #35Parameter changes

3Use of energy by moving object

If BF2 or B(CN)2-based bodipy structures are used, then light efficiency is improved, but light resistance and heat resistance are insufficient

Engineering Contradiction:

Improvelight efficiencyVSAvoidlight resistance and heat resistance

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The patent creates composite molecular structures combining rigid aromatic groups (for stability and resistance) with flexible alkyl chains (for solubility and processability), achieving both high light efficiency and excellent light/heat resistance

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent introduces specific functional groups at different positions of the molecular structure - rigid groups at core positions for stability and flexibility at peripheral positions for solubility, optimizing local properties to achieve overall performance

Inventive Principle:

Principle #3Local quality

4Stability of the object's composition

If existing fluorescent compounds are used, then color reproduction is achieved, but solubility and processability are limited

Engineering Contradiction:

Improvecolor reproductionVSAvoidsolubility and processability

Core Design Contradiction:

Stability of the object's compositionVSEase of operation

Solution Approach 1:

The patent introduces flexible alkyl chains and alkoxy groups at specific positions of the molecular structure to improve solubility and processability while maintaining the core fluorescent structure for color reproduction

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent designs composite molecular structures with both rigid aromatic cores (for color properties) and flexible side chains (for solubility), achieving excellent processability while maintaining high color reproduction performance

Inventive Principle:

Principle #40Composite materials

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 achieves high color reproduction and light resistance, enabling wider color coordinates and better performance in display applications.

Implementation Method 1

photoresist fluorescent resin composition including the same, and a color conversion film prepared using the same

Methodology Applied

Scientific EffectFluorescence: Fluorescence

Data Source

PatentUS12584020B2Compound, photosensitive fluorescent resin composition comprising same, color conversion film prepared using same, backlight unit, and display device

Publication Date: 2026.03.24 LG CHEM LTD

AI summary

A compound represented by Chemical Formula 1:a photoresist fluorescent resin composition containing the compound of the Chemical Formula 1, a binder resin and a polymerizable compound including an ethylenically unsaturated bond, a color conversion film manufactured using the photoresist fluorescent resin composition, a backlight unit comprising the color conversion film, and a display apparatus comprising the backlight unit.